http://www.usgs.gov/alerts/landslides.rss Landslides Hazard Alerts posted by the U.S. Geological Survey, web browsers may or may not display the latest alert first. U.S. Geological Survey en-us public domain Sun, 04 Jul 2009 04:48:23 GMT Sun, 04 Jul 2009 04:48:23 GMT http://www.usgs.gov/alerts/cap/USGS-landslides.20081215T194706 At 10:14 AM, December, 15, 2008, the National Weather Service in San Diego issued a Flash Flood Warning for the area burned by the Santiago Fire in Orange County California. Areas potentially affected by this warning include the area burned by the 2007 Santiago Fire, Silverado Canyon, Fremont Canyon, the towns of Silverado and Modjeska, and the cities of Tustin Foothills, Tustin, and Mission Viejo. Debris flows issuing from burned basins can impact roads travelling up Silverado Creek, Williams Canyon, Harding Canyon and Modjeska Creek. jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20081215T194706 20081215T194706.000Z Mon, 15 Dec 2008 19:47:06 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20081215T171517 At 6:30 AM, December, 15, 2008, the National Weather Service in San Diego issued a Flash Flood Warning for the area burned by the Freeway Complex. Areas potentially affected by debris flows are Olinda Village near Brea, Carbon Canyon, Brush Canyon, Box Canyon and San Antonio near Yorba Linda, and the Cascade apartments in Anaheim. Residents and motorists in, and below the recently burned areas should be alert to debris flows that may block roads and culverts. jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20081215T171517 20081215T171517.000Z Mon, 15 Dec 2008 17:15:17 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20081215T171316 At 3:20 AM, December, 15, 2008, the National Weather Service in Oxnard issued Flash Flood Warnings for the areas burned by the Corral, Sesnon, Sayre, Marek, Griffith Park, Barham, Ranch, Buckweed, Magic, Santa Anita, and North Fires in eastern Ventura and western Los Angeles Counties. Doppler radar has indicated that heavy rainfall is moving east towards the burned areas. Rainfall may meet or exceed USGS thresholds for rainfall conditions that may trigger debris flows in burned areas. jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20081215T171316 20081215T171316.000Z Mon, 15 Dec 2008 17:13:16 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20081215T171057 At 12:21 AM, December, 15, 2008, the National Weather Service in Oxnard issued a Flash Flood Warnings for the areas burned by the Gap and Tea fires. Locations in the warning include, but are not limited to, locations near and downstream of the burned areas burned by the Gap and Tea fires. jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20081215T171057 20081215T171057.000Z Mon, 15 Dec 2008 17:10:57 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20081126T163623 At 10:58 PM, Nov. 25, 2008, the National Weather Service issued a Flash Flood Warning for the area burned by the Tea Fire. Areas potentially affected include the city of Montecito, highway 192 and Mountain Drive in the vicinity of Westmont College. jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20081126T163623 20081126T163623.000Z Wed, 26 Nov 2008 16:36:23 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20081126T163327 Between 1:23 AM and 2:20 AM, Nov. 26, 2008, the National Weather Service in Oxnard, CA, issued a Flash Flood Warnings for areas burned by the Sayre, Marek, Sesnon, and Santa Anita fires in Los Angeles County. jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20081126T163327 20081126T163327.000Z Wed, 26 Nov 2008 16:33:27 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20081126T162948 At 3:28 AM, Nov. 26, 2008, the National Weather Service in San Diego, CA, issued a Flash Flood Warning for the area burned by the Freeway Complex in southwestern San Bernardino, north-central Orange, and northwestern Riverside Counties in Southern California. Areas prone to debris flow include the cities of Yorba Linda, San Antonio, Brea, Olinda Village, and portions of Anaheim (Cascade Apartments). Carbon Canyon, Brush Canyon, Box Canyon are also prone to debris flow and mandatory evacuations have occurred in some of these canyons in the Yorba Linda area. jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20081126T162948 20081126T162948.000Z Wed, 26 Nov 2008 16:29:48 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20080522T201150 On Thursday, May 22, 2008, the National Weather Service issued a flash flood warning for North Central San Diego County in Southwest California. Locations in the warning include but are not limited to: Fallbrook, Rainbow, Pauma Valley, Palomar Mountain, Rincon and Valley Center. Areas burned by the Rice and Poomacha Fires will also be affected. jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20080522T201150 20080522T201150.000Z Thu, 22 May 2008 20:11:50 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20080522T191306 On Thursday, May 22, 2008 the National Weather Service issued a flash flood warning for Southwestern San Bernardino County, Northeastern Orange County, and Western Riverside Counties, in Southwest California. This includes the cities of Yorba Linda and Corona. In addition to flash flooding, rainfall is expected to cause debris flows in the areas burned by the Santiago and Sierra fires. jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20080522T191306 20080522T191306.000Z Thu, 22 May 2008 19:13:06 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20071207T172254 On Friday, December 07, 2007, the National Weather Service issued a flash flood warning for western San Diego County in Southwest California. This includes the cities of Ramona, Poway, Escondido, El Cajon, Valley Center, Santee and Lakeside. In addition to flash flooding, rainfall is expected to cause debris flows in the Poomacha, Rice, and Witch fire burned areas. jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20071207T172254 20071207T172254.000Z Fri, 7 Dec 2007 17:22:54 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20071203T180530 ...HEAVY RAINFALL WILL GIVE A RISK FOR LANDSLIDES TO WESTERN WASHINGTON THROUGH TONIGHT.. HEAVY RAINS OF 3 TO 6 INCHES OVER THE PAST 24 HOURS HAVE SATURATED SOILS AROUND WESTERN WASHINGTON. HEAVY RAINFALL RATES OF 0.25 TO TO 0.50 INCHES PER HOUR WILL CONTINUE THROUGH THE MID AFTERNOON HOURS. THIS WILL PUT EXTRA PRESSURE ON SOIL STABILITY. INDICES DEVELOPED BY THE U.S.G.S. SHOW THAT LANDSLIDES ARE POSSIBLE DURING INTENSE RAINFALL OR WHEN RAINFALL AMOUNTS EXCEED ONE INCH IN 24 HOURS. OBSERVED RAINFALLS HAVE ALREADY EXCEEDED THAT AMOUNT TODAY...INCLUDING THE SEATTLE AREA. WHILE THE U.S.G.S. RAINFALL THRESHOLDS APPLY TO THE SEATTLE AREA OF PUGET SOUND...MOST OF THE LOWLANDS OF WESTERN WASHINGTON ARE SUSCEPTIBLE TO LANDSLIDES DUE TO WET SOILS. AREAS MOST SUSCEPTIBLE TO LANDSLIDES UNDER THESE CONDITIONS ARE STEEP COASTAL BLUFFS AND OTHER STEEP HILLSIDES. baum@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20071203T180530 20071203T180530.000Z Mon, 3 Dec 2007 18:05:30 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20071130T235305 On Friday, November 30, 2007, the National Weather Service issued flash flood warnings for the Poomacha, Rice, Santiago, Grass Valley, Slide, Pinnacles and Emerald burn areas in San Diego and San Bernardino Counties. The watch is in effect until 5:30 pm pst. Heavy rain capable of producing significant mud and debris flows was occurring over the warned area. Locations in the warning include, but are not limited to, Palomar Mountain. Debris flows and rock slides are expected with this storm. These can potentially trap and kill people caught in their path. Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, country roads and farmland along the banks of creeks and streams. cannon@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20071130T235305 20071130T235305.000Z Fri, 30 Nov 2007 23:53:05 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20071130T211526 On Friday, November 30, 2007, the National Weather Service issued a flash flood warning for the Poomacha and Rice burn areas in north-central San Diego County. The watch is in effect until 11:45 am pst. At 9:32 am, heavy rain capable of producing significant mud and debris flows was occurring over the warned area. Locations in the warning include, but are not limited to, Palomar Mountain. Debris flows and rock slides are expected with this storm. These can potentially trap and kill people caught in their path. Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, country roads and farmland along the banks of creeks and streams. jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20071130T211526 20071130T211526.000Z Fri, 30 Nov 2007 21:15:26 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20071130T192344 On Friday, November 30, 2007, the National Weather Service issued a flash flood warning for the Poomacha and Rice burn areas in north-central San Diego County. The watch is in effect until 11:45 am pst. At 9:32 am, heavy rain capable of producing significant mud and debris flows was occurring over the warned area. Locations in the warning include, but are not limited to, Palomar Mountain. Debris flows and rock slides are expected with this storm. These can potentially trap and kill people caught in their path. Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, country roads and farmland along the banks of creeks and streams. jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20071130T192344 20071130T192344.000Z Fri, 30 Nov 2007 19:23:44 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20070831T220147 On Friday, August 31, 2007, the National Weather Service issued a flash flood warning for South Central San Bernardino County in Southeast California. This warning includes the areas near Big Bear Lake and Lake Arrowhead, Big Bear city and the watersheds burned by the Pinnacles and Millard-Heart-Sawtooth Complex fires and is in effect until 4:30 pm pdt. State highway 173, north of Lake Arrowhead and the neigborhoods of Morongo Valley, Yucca Valley and Pioneertown will be subject to flash flooding and debris flows. Roads within the burned areas, including Big Morongo Canyon Rd, may also be impacted jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20070831T220147 20070831T220147.000Z Fri, 31 Aug 2007 22:01:47 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20070831T215151 On Friday, August 31, 2007 the National Weather Service issued a flash flood warning for western Riverside county in southwest California. This warning includes the cities of Beaumont, Banning, Temecula and Hemet, and is in effect until 4:30 pm pdt. At 2:22 pm pdt, flash flooding was reported from a thunderstorm over the warned area. The watersheds recently burned by the Esperanza fire will be particularly susceptible to flash floods and debris flows during the rainstorms. Communities of Beaumont and Banning, located adjacent to the burned area, including Smith canyon and Potrero creek may be affected by these events. Roads that cross burned drainages are also susceptible to flash flooding and debris flows. These include, but are not limited to; Beaumont ave., Circle C rd., Castille Cyn rd., Highland Springs ave., Old Banning Idyllwild rd., shirleon dr., Poppet Flats rd., state Highway 243, Cryer drive and Mt. Edna rd. jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20070831T215151 20070831T215151.000Z Fri, 31 Aug 2007 21:51:51 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20070815T185348 On Tuesday, Aug. 14, 2007 the National Weather Service issued a flash flood warning for south central San Bernardino county and western Riverside county and north central San Diego county in Southwest California. This warning includes, but is not limited to, the cities of East Hemet, Forest Falls, Idyllwild, Valle Vista, Cherry Valley, Beaumont and Banning. The warning is effective until 4:30 pm pdt. The watersheds recently burned by the Esperanza fire will be particularly susceptible to flash floods and debris flows during the rainstorms. Communities of Beaumont and Banning, located adjacent to the burned area, includeing Smith canyon and Potrero creek may be affected by these events. Roads that cross burned drainages are also susceptible to flash flooding and debris flows. These include, but are not limited to; Beaumont ave., Circle C rd., Castille Cyn rd., Highland Springs ave., Old Banning Idyllwild rd., shirleon dr., Poppet Flats rd., state Highway 243, Cryer drive and Mt. Edna rd. jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20070815T185348 20070815T185348.000Z Wed, 15 Aug 2007 18:53:48 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20070815T172303 On Tuesday, Aug. 14, 2007 the National Weather Service issued a flash flood warning for south central San Bernardino county and western Riverside county and north central San Diego county in Southwest California. This warning includes, but is not limited to, the cities of East Hemet, Forest Falls, Idyllwild, Valle Vista, Cherry Valley, Beaumont and Banning. The warning is effective until 4:30 pm pdt. The watersheds recently burned by the Esperanza fire will be particularly susceptible to flash floods and debris flows during the rainstorms. Communities of Beaumont and Banning, located adjacent to the burned area, includeing Smith canyon and Potrero creek may be affected by these events. Roads that cross burned drainages are also susceptible to flash flooding and debris flows. These include, but are not limited to; Beaumont ave., Circle C rd., Castille Cyn rd., Highland Springs ave., Old Banning Idyllwild rd., shirleon dr., Poppet Flats rd., state Highway 243, Cryer drive and Mt. Edna rd. jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20070815T172303 20070815T172303.000Z Wed, 15 Aug 2007 17:23:03 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20061222T180629 On Saturday, December 16, 2006 the National Weather Service issued a Flash Flood Warning for the cities of Yucaipa, Redlands, Highland and particularly Plunge Creek north of Highland. Doppler radar indicated flash flooding for a stationary thunderstorm near Plunge Creek. In addition to flash flooding, rainfall is expected to cause debris flows in recently burned areas. Residents and motorists in and below burned areas should be alert to heavy mud and debris flows which may block roads and culverts. Potentially dangerous flooding and property loss could result in areas where runoff is restricted or blocked. This warning was cancelled at 8:00 pm December, 16, 2006 jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20061222T180629 20061222T180629.000Z Fri, 22 Dec 2006 18:06:29 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20061211T180338 On Saturday, December, 9, 2006 the National Weather Service issued Flash Flood Warnings for specific burned areas in Southern California. Areas in, or below steep slopes in the Topanga, Shekell, Day, and School fire burn areas are at risk and are susceptible to flash flooding, mud slides, rock slides and debris flows. Residents and motorists in and below burned areas should be alert to heavy mud and debris flows which may block roads and culverts. Potentially dangerous flooding and property loss could result in areas where runoff is restricted or blocked. jegartner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20061211T180338 20061211T180338.000Z Mon, 11 Dec 2006 18:03:38 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060831T184846 Recent rainfall has soaked hillsides in the mountainous areas of the southeastern United States. In the Appalachian Mountains of North Carolina and the Blue Ridge Mountains of Virginia, 4.5 to 5.3 inches of rain has already occurred in the last several days before August 31, 2006. This preliminary rainfall soaking the soil and rock of hillsides can make these regions highly susceptible to landslides if major rainfall occurs when Hurricane or Tropical Storm Ernesto reaches these areas in the next couple of days, which is the predicted direction of the major rainfall of the continuing path of the hurricane. Rain is expected to persist throughout the central and northern Eastern United States beginning soon and continuing through this weekend. If the rainfall is intense, fast moving landslides, e.g. debris flows and rock falls, may be initiated. With less intense rainfall, but consistent heavy rain lasting for several days, more slowly moving landslides, such as earth slumps and block slides, are likely to initiate. Based on previous damaging hurricanes and heavy storms, parts of the mountainous Eastern United States, specifically Virginia, are particularly prone to landslides including the areas in the Appalachians and Blue Ridge Mountains. Such landslides can occur on hillsides that have slope as little as approximately 15 degrees. The combination of saturated soil and rock, heavy rainfall (perhaps the approximately maximum predicted 6.9 inches in 24 hours), could possibly trigger rapidly moving landslides from steep hillside slopes that contain weakened geologic materials. gwieczor@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060831T184846 20060831T184846.000Z Thu, 31 Aug 2006 18:48:46 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060721T154051 At 4:52 pm, Thursday, July 20,2006 the National Weather Service in Oxnard issued a Flash Flood Warning for North Central Los Angeles County in Southwest California. This warning is in effect until 6:15 pm, and includes the Antelope Valley cities of Lancaster and Palmdale. At 4:48 pm local law enforcement officials reported flash flooding between Highway 138 and Avenue K to the Kern County line. Excessive runoff from heavy rainfall will cause flooding of small low water crossings, urban areas, highways, streets, underpasses and other drainage areas and low lying spots. cannon@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060721T154051 20060721T154051.000Z Fri, 21 Jul 2006 15:40:51 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060720T201808 At 11:43 am, Thursday, July 20, 2006 the National Weather Service of San Diego issued a Flash Flood Watch. Areas in, or below steep slopes in the Sawtooth and Millard Burn areas and are especially at risk and are the most susceptible to flash flooding, mud slides, rock slides and debris flows. A flow of monsoon moisture into Southern California will continue to bring scattered showers and thunderstorms today. Thunderstorms this afternoon and evening will have the potential to produce locally heavy rainfall rates of up to three quarters of an inch per hour. cannon@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060720T201808 20060720T201808.000Z Thu, 20 Jul 2006 20:18:08 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060720T161849 At 3:57 am, Thursday, July 20, 2006 the National Weather Service for Los Angeles and Oxnard, California issued a flash flood watch for the mountains of Los Angeles, Ventura and Santa Barbara Counties. An influx of deep subtropical moisture into Southwestern California will cause an increasing chance of showers and thunderstorms today. The chance of thunderstorms will be greatest this afternoon and evening across the Cuyama Valley, Antelope Valley and the Santa Barbara Mountains, Ventura and Los Angeles Counties excluding the Santa Monica Mountains. The mid and upper level winds which will be steering any thunderstorms will be very weak. Therefore thunderstorms and heavy showers could linger over any particular area for a while, producing heavy rainfall and a threat of flash flooding and debris flows. The Perkins Burn Area is a recent fire that will be particularly vulnerable to flash flooding with debris flows should thunderstorms develop over that region this afternoon through this evening. cannon@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060720T161849 20060720T161849.000Z Thu, 20 Jul 2006 16:18:49 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060720T160742 The flash flood watch for the Antelope Valley, Cuyama Valley, Los Angeles County Mountains excluding the Santa Monica Range, San Luis Obispo County Interior Valleys, San Luis Obispo Mountains, Santa Barbara County Mountains and Ventura County Mountains of Southern California has been cancelled. Shower and thunderstorm activity was greatly inhibited across the region this afternoon and any isolated showers that develop through the early evening are not expected to produce flash flooding. cannon@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060720T160742 20060720T160742.000Z Thu, 20 Jul 2006 16:07:42 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060720T160202 At 10:20 am, Wednesday, July 19, 2006 the National Weather Service for Los Angeles and Oxnard, California issued a flash flood watch for portions of Los Angeles, Ventura, Santa Barbara and San Luis Obispo Counties. A moist tropical airmass over the region has produced the potential for thunderstorms with heavy downpours that could produce flash flooding. This threat will develop this afternoon and continue through the evening hours and this watch is in effect from 1 pm to 8 pm. The flash flood watch includes the following areas in southwest California; Antelope Valley, Cuyama Valley, Los Angeles County Mountains excluding the Santa Monica Range, San Luis Obispo County Interior Valleys, San Luis Obispo Mountains, Santa Barbara County Mountains and Ventura County Mountains. The Perkins Burn Area is a recent fire that will be particularly vulnerable to flash flooding with debris flows should thunderstorms develop over that region later in the day. cannon@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060720T160202 20060720T160202.000Z Thu, 20 Jul 2006 16:02:02 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060719T153717 At 5:32 pm, Tuesday, July 18, 2006, th National Weather Service cancelled the Flash Flood and Debris Flow Watch for the Sawtooth and Millard burned areas, including portions of Apple and Lucerne Valleys, Coachella Valley and San Bernardino and Riverside County mountains. cannon@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060719T153717 20060719T153717.000Z Wed, 19 Jul 2006 15:37:17 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060719T152725 The flash flood watch for the Cuyama Valley, San Luis Obispo County Mountains, Santa Barbara County Mountains and Ventura County Mountains was cancelled at 7:22 pm, Tuesday, July 18, 2006. Thunderstorm activity dissipated or moved out of the region cannon@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060719T152725 20060719T152725.000Z Wed, 19 Jul 2006 15:27:25 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060718T213923 At 2:08 pm on Tuesday July 18, 2006 the National Weather Service issued a flash flood watch for portions of Ventura, Santa Barbara and San Luis Obispo counties. Of particular concern is the Perkins burn area in Santa Barbara County that would be prone to mud and debris flows if heavy showers develop over the region. A moist, tropical airmass over the region today has produced the potential for thunderstorms with heavy downpours that could produce flash flooding. This threat will develop as the afternoon progresses and will continue through the early evening hours until 8:00 pm. Thunderstorms this afternoon and early evening have the potential for producing heavy downpours with flash flooding. Flash flooding could result in flooded rural roadways and debris flows near and downstream of the Perkins burn area. cannon@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060718T213923 20060718T213923.000Z Tue, 18 Jul 2006 21:39:23 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060718T193716 At 11:24 am PDT on Tuesday, July 18, 2006, the National Weather Service extended the Flash Flood and Debris Flow Watch for the Sawtooth and Millard burned areas until 9:00 pm PDT. A flow of monsoonal moisture into southern California will bring favorable conditions for showers and thunderstorms. Storms will have the potential to produce locally heavy rain and thus flash flooding and debris flows from the Sawtooth and Millard burn areas. Locally heavy rainfall rates up to two thirds of an inch per hour will be possible. cannon@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060718T193716 20060718T193716.000Z Tue, 18 Jul 2006 19:37:16 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060717T220303 At 2:08 pm PDT on Monday, July 17, 2006, the National Weather Service issued a Flash Flood and Debris Flow Watch for the Sawtooth and Millard burned areas, including portions of Apple and Lucerne Valleys, Coachella Valley and San Bernardino and Riverside County mountains. The Watch remains in effect through Tuesday evening. A flow of monsoonal moisture will continue into southern California through this week and will bring favorable conditions for showers and thunderstorms. Storms will have the potential to produce locally heavy rain and thus flash flooding and debris flows from the Sawtooth and Millard burn areas. Locally heavy rainfall rates up to two thirds of an inch per hour will be possible. cannon@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060717T220303 20060717T220303.000Z Mon, 17 Jul 2006 22:03:03 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060522T153745 At 6:02 am PST on Monday May 22, 2006 the flash flood watch for the recently burned areas in Santa Barbara, Ventura and Los Angeles Counties was cancelled. The bulk of the heavy showers and isolated thunderstorms have moved to the east of Los Angeles and Ventura Counties. There will still be a chance of showers through the afternoon but rainfall rates will be well below the rainfall thresholds for flash floods and debris flows from recently burned areas. cannon@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060522T153745 20060522T153745.000Z Mon, 22 May 2006 15:37:45 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060522T144154 At 8:41 pm PDT on Saturday May 20, 2006, the National Weather Service issued a Flash Flood and Debris Flow Watch for recently burned areas in Santa Barbara, Ventura and Los Angeles Counties. The Watch remains in effect for Monday morning, May 22, 2006. A strong Pacific storm system could bring rainfall rates of one half of an inch per hour; these rates exceed USGS rainfall thresholds for flash floods and debris flows from recently burned areas. cannon@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060522T144154 20060522T144154.000Z Mon, 22 May 2006 14:41:54 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060406T213015 THE FLASH FLOOD WATCH FOR THE BURN AREAS OF SOUTHWEST CALIFORNIA WILL EXPIRE AT 2 PM PDT THIS AFTERNOON. SCATTERED SHOWERS ARE EXPECTED TO CONTINUE THROUGH THE EARLY EVENING HOURS. SOME SHOWERS MAY PRODUCE BRIEF HEAVY RAIN. HOWEVER...THE SHOWERS ARE MOVING RAPIDLY EAST AND ANY HEAVY RAIN THAT DOES FALL IS NOT EXPECTED TO LINGER OVER ANY ONE AREA FOR MORE THAN A FEW MINUTES. AS A RESULT...BURN AREA MUD AND DEBRIS FLOWS ARE NO LONGER EXPECTED. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060406T213015 20060406T213015.000Z Thu, 6 Apr 2006 21:30:15 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060403T214057 Description: Recent almost continuous rainfall has soaked hillsides in the San Francisco Bay area making them highly susceptible to landslides. Large slow-moving landslides have already recently occurred in San Mateo and Marin Counties. Rain is expected to continue throughout this week and more slow moving landslides are expected to initiate and start moving during the next several weeks even after the rain stops. Parts of the Bay Area particularly prone to landslides include the areas in or near the Santa Cruz Mountains, Mount Tamalpais and the East Bay hills. Such landslides can occur on hillsides that slope as little as 5-8 degrees. Heavy rainfall, perhaps 5 inches in 24 hours, could also trigger rapidly moving debris flows from steep slopes. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060403T214057 20060403T214057.000Z Mon, 3 Apr 2006 21:40:57 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060403T190431 Recent, almost continuous rainfall has soaked hillsides in the San Francisco Bay area making them highly susceptible to landslides. Large slow-moving landslides have already recently occurred in San Mateo and Marin Counties. Rain is expected to continue throughout this week and more slow moving landslides are expected to initiate and start moving during the next several weeks even after the rain stops. Parts of the Bay Area particularly prone to landslides include the areas in or near the Santa Cruz Mountains, Mount Tamalpais and the East Bay hills. Such landslides can occur on hillsides that slope as little as 5-8 degrees. Heavy rainfall, perhaps 5 inches in 24 hours, could also trigger rapidly moving debris flows from steep slopes. gwieczor@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060403T190431 20060403T190431.000Z Mon, 3 Apr 2006 19:04:31 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060403T170312 A Flash Flood and Debris Flow Watch issued by the National Weather Service for recently burned areas in Ventura and Los Angeles Counties for Monday April 3 through Wednesday morning, April 5. There could be rainfall rates of one half inches per hour; these rates exceed USGS rainfall thresholds for flash floods and debris flows from recently burned areas. dakinner@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060403T170312 20060403T170312.000Z Mon, 3 Apr 2006 17:03:12 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060329T173921 At 10:00 am PST on Wednesday March 29, the flash flood watch for the recently burn areas in Orange, Riverside, San Bernardino and San Diego Counties expired. The threat of flash floods and debris flows no longer exists for the burned areas. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060329T173921 20060329T173921.000Z Wed, 29 Mar 2006 17:39:21 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060329T154011 A Flash Flood and Debris Flow Watch issued by the National Weather Service for recently burned areas in San Bernardino, Orange, Riverside, and San Diego Counties remains in effect until 10:00 am PST, Wednesday March 29, 2006. There could be rainfall rates of one third to two thirds of an inch per hour; these rates exceed USGS rainfall thresholds for flash floods and debris flows from recently burned areas. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060329T154011 20060329T154011.000Z Wed, 29 Mar 2006 15:40:11 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060329T152520 At 1:42 am PST on Wednesday, March 29, the National Weather Service issued a Warning for flash flood and debris-flow activity from the Harvard burned area above Burbank, Central Los Angeles County, California. NWS Doppler radar indicated heavy showers moving into the Harvard burned area. Automated rain gages reported more than one third of an inch of rain in one half hour. Rainfall at these rates will likely result in flash floods and debris flows in and below the Harvard burned area. The Warning is in effect until 2:45 am PST. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060329T152520 20060329T152520.000Z Wed, 29 Mar 2006 15:25:20 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060329T151523 At 9:47 pm PST on Tuesday March 28, the National Weather Service cancelled the flash flood watch of the recent burn areas in Los Angeles and Ventura Counties in southwest California. The frontal system responsible for producing heavy rain across southwestern California during the past day has moved eastward out of the area. The threat of flash floods and debris flows no longer exists for the burned areas. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060329T151523 20060329T151523.000Z Wed, 29 Mar 2006 15:15:23 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060328T212426 The Flash Flood and Debris Flow Watch issued by the National Weather Service for areas of Ventura and Los Angeles Counties burned in 2005 remains in effect as of 12:33 PST, Tuesday March 28, 2006. Burned areas include the School Canyon, Topanga, Harvard, Tovey and Gorman Fires. Rainfall intensities could exceed one half an inch per hour; these rates exceed USGS rainfall thresholds for flash floods and debris flows from recently burned areas. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060328T212426 20060328T212426.000Z Tue, 28 Mar 2006 21:24:26 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060327T182752 At 9:59 am PST on Monday, March 27, the National Weather Service issued a Watch for flash flood and debris flows from areas of Ventura and Los Angeles Counties burned in 2005. These include the School Canyon, Topanga, Harvard, Tovey and Gorman Fires. Rainfall rates could reach one half to three quarters of an inch per hour; these rates exceed USGS rainfall thresholds for flash floods and debris flows from recently burned areas. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060327T182752 20060327T182752.000Z Mon, 27 Mar 2006 18:27:52 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060327T144239 At 4:09 am PST on Monday, March 27, the National Weather Service issued a Watch for flash flood and debris flows from recently burned areas of Ventura and Los Angeles Counties. These include the School Canyon, Topanga, Harvard, Tovey and Gorman Fires. Rainfall rates could exceed two thirds of an inch per hour, which exceeds USGS rainfall thresholds for recently burned areas. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060327T144239 20060327T144239.000Z Mon, 27 Mar 2006 14:42:39 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060313T151136 At 2:35 am PST on Friday, March 10, the National Weather Service issued a Watch for flash flood and debris-flow activity from recently burned areas of Ventura and Los Angeles Counties. These include the School Canyon, Topanga, Harvard, Piru, Simi, and Foothill Fires. There was the potential for brief heavy rain along with isolated thunderstorms. Rainfall intensities could exceed USGS thresholds, especially for the 2005 burned areas. The Watch was allowed to expire on 5:46 pm PST on Saturday, March 11. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060313T151136 20060313T151136.000Z Mon, 13 Mar 2006 15:11:36 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060303T195928 At 11:26 am PST on Friday March 3, the National Weather Service cancelled the flash flood watch of the recent burn areas in Los Angeles and Ventura Counties in southwest California. The heavy rain showers that occurred earlier in the day have rapidly decreased in coverage and the threat of flash floods and debris flows no longer exists for the burned areas. cannon@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060303T195928 20060303T195928.000Z Fri, 3 Mar 2006 19:59:28 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060303T162017 At 8:00 am PST on Friday, March 3, the National Weather Service issued a Warning for flash flood and debris-flow activity from the Harvard burned area above Burbank, Central Los Angeles County, California. At 7:55 NWS Doppler radar indicated heavy showers over the Hollywood Hills moving northeast at approximately 30 mph. Rainfall rates with these showers exceed one half inch per hour. Based on thresholds provided by the USGS, these rainfall rates are sufficient to trigger flash flooding and debris flows in and below the recently burned area. These showers will be in the vicinity of the Harvard burned area by 8:15am. The Warning is in effect until 10:00am. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060303T162017 20060303T162017.000Z Fri, 3 Mar 2006 16:20:17 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060303T160746 At 7:51 am on Friday, March 3, the National Weather Service issued a Watch for flash flood and debris-flow activity from recently burned areas of Santa Ventura and Los Angeles Counties. These include the School Canyon, Topanga, Harvard, Tovey, and Gorman Fires. There is a potential that rainfall rates will exceed one half inch per hour across Ventura and Los Angeles Counties. From thresholds provided by the USGS, rainfall at these rates could result in flash flooding and debris flows in and below recently burned areas until 6 pm March 3. The watch issued at 1:45 am for Santa Barbara County and the Gaviota burned area has been cancelled. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060303T160746 20060303T160746.000Z Fri, 3 Mar 2006 16:07:46 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060303T145610 At 1:34 pm on Friday, March 3, the National Weather Service issued a Watch for flash flood and debris-flow activity from recently burned areas of Santa Barbara, Ventura and Los Angeles Counties. These include the Gaviota, School Canyon, Topanga, Harvard, Tovey, and Gorman Fires. There is a potential that rainfall rates will exceed one inch per hour across Santa Barbara County and one half inch per hour across Ventura and Los Angeles Counties. From thresholds provided by the USGS, rainfall at these rates could result in flash flooding and debris flows in and below recently burned areas through the afternoon of March 3. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060303T145610 20060303T145610.000Z Fri, 3 Mar 2006 14:56:10 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060301T181711 At 6:08 pm on Monday, February 27 the National Weather Service issued a Warning for flash flood and debris-flow activity from the Topanga burned area in Ventura County. Areas that could be impacted include State Highway 118 near Santa Susana Pass, Santa Susana Pass Road and residences in and below the burned area. The Warning is based on a comparison of forecast and measured precipitation with rainfall thresholds provided by the USGS. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060301T181711 20060301T181711.000Z Wed, 1 Mar 2006 18:17:11 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060301T181339 Between 2:37 pm on Saturday, February 25 and 9:14 pm on Monday, February 27, the National Weather Service issued Watches for flash flood and debris-flow activity for the recently burned areas in Ventura and Los Angeles Counties. Watches were issued for the Gaviota, School Canyon, Topanga, Harvard, Gorman, and Tovey burned areas. The Watches are based on a comparison of forecast and measured precipitation with rainfall thresholds provided by the USGS. The final Watch was cancelled at 3:14 am, Tuesday, February 28, 2006. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060301T181339 20060301T181339.000Z Wed, 1 Mar 2006 18:13:39 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060221T151908 Between 4:05 am on Saturday, February 18 and 3:41 am on Sunday, February 19, the National Weather Service issued Watches for flash flood and debris-flow activity for the recently burned areas in Ventura and Los Angeles Counties. Watches were issued for the School Canyon, Topanga, Harvard and Tovey burned areas. The Watches are based on a comparison of forecast and measured precipitation with rainfall thresholds provided by the USGS. The final Watch was cancelled at 9:05 am, Sunday, February 19. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060221T151908 20060221T151908.000Z Tue, 21 Feb 2006 15:19:08 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060221T151719 Between 4:05 am on Saturday, February 18 and 3:41 am on Sunday, February 19, the National Weather Service issued Watches for flash flood and debris-flow activity for the recently burned areas in Ventura and Los Angeles Counties. Watches were issued for the School Canyon, Topanga, Harvard and Tovey burned areas. The Watches are based on a comparison of forecast and measured precipitation with rainfall thresholds provided by the USGS. The final Watch was cancelled at 9:05 am, Sunday, February 19. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060221T151719 20060221T151719.000Z Tue, 21 Feb 2006 15:17:19 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060216T194637 Watersheds burned by the Sierra Fire in Orange County are susceptible to flash floods and debris flows during rainstorms. Drainageways in Featherly Regional Park, stream crossings on State Highways 91 and 241 and Gypsum Canyon Road, and Santiago Reservoir could be impacted by these events. A short period of moderate rainfall on the burned watersheds can lead to flash floods and debris flows. Rainfall that is normally absorbed by vegetation can run off almost instantly. This causes creeks and drainage areas to flood much sooner during a storm, and with more water than is normal. In addition, the soils in a burn scar are highly erodible so flood waters can contain significant amounts of ash, mud, boulders, and vegetation. Within the burned area and downstream, the powerful force of rushing water, soil, and rock can destroy culverts, bridges, roadways, and structures, and can cause injury or death if care is not taken. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060216T194637 20060216T194637.000Z Thu, 16 Feb 2006 19:46:37 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060129T215754 Date: Sunday, January 29, 2006, 1:00 p.m., PST The U.S. Geological Survey advises that wet soil conditions and continuing rainfall are likely to result in additional landslides during the next several days. Given the wet soil conditions, landslides are highly probable during intense rainfall or when rainfall amounts exceed 1.5 inches in 24 hours. Steep coastal bluffs and other steep hillsides are particularly susceptible to landslides under present conditions. For more information about current conditions, see the following web pages: http://www.wrh.noaa.gov/sew/ pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060129T215754 20060129T215754.000Z Sun, 29 Jan 2006 21:57:54 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060117T183555 Between 2:25 pm on Thursday January 12 and 3:51 am Saturday January 14, 2006, the National Weather Service issued Flash Flood Watches for the recently burned areas in Ventura and Los Angeles Counties. Watches were issued for the Topanga, Harvard, School Canyon, Gorman, Tovey, Pine, Crown, Foothill, Piru, Simi, and Padua burned areas. The Watches indicated that these areas are susceptible to debris flows and flash floods. The Watches were based on comparison of predicted rainfall amounts with rainfall thresholds provided by the USGS. The final Flash Flood Watch was cancelled at 7:14 am Saturday January 14, 2006. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060117T183555 20060117T183555.000Z Tue, 17 Jan 2006 18:35:55 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060106T211312 The U.S. Geological Survey advises that wet soil conditions and continuing rainfall are likely to result in additional landslides during the next several days. Given the wet soil conditions, landslides are highly probable during intense rainfall or when rainfall amounts exceed one inch in 24 hours. Steep coastal bluffs and other steep hillsides are particularly susceptible to landslides under present conditions. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060106T211312 20060106T211312.000Z Fri, 6 Jan 2006 21:13:12 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060103T175910 Between 3:16 am on Friday December 30, 2005 and 1:35 pm Monday January 2, 2006, the NWS issued Flash Flood Watches and Warnings for the recently burned areas in Santa Barbara, Ventura, and Los Angeles Counties. Watches and Warnings were issued for the Gaviota, Topanga, Harvard, School Canyon, Gorman, Tovey, Pine, Crown Foothill, Piru, Simi, and Padua burned areas and indicated that these areas are susceptible to debris flows and flash floods. The Watches and Warnings were based on comparison of predicted and measured rainfall amounts with rainfall thresholds provided by the USGS. The final Flash Flood Watch was cancelled at 6:31 pm Monday January 2, 2006. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060103T175910 20060103T175910.000Z Tue, 3 Jan 2006 17:59:10 +0000 http://www.usgs.gov/alerts/cap/USGS-landslides.20060103T173359 Between 3:16 am on Friday December 30, 2005 and 1:35 pm Monday January 2, 2006, the NWS issued Flash Flood Watches and Warnings for the recently burned areas in Santa Barbara, Ventura, and Los Angeles Counties. Watches and Warnings were issued for the Gaviota, Topanga, Harvard, School Canyon, Gorman, Tovey, Pine, Crown Foothill, Piru, Simi, and Padua burned areas and indicated that these areas are susceptible to debris flows and flash floods. The Watches and Warnings were based on comparison of predicted and measured rainfall amounts with rainfall thresholds provided by the USGS. The final Flash Flood Watch was cancelled at 6:31 pm Monday January 2, 2006. pgori@usgs.gov Geo http://www.usgs.gov/alerts/cap/USGS-landslides.20060103T173359 20060103T173359.000Z Tue, 3 Jan 2006 17:33:59 +0000