At atmospheric river brought heavy precipitation to California from December 31, 2022 through January 2, 2023. USGS crews took 77 measurements at 58 sites across the state, with northern California being hardest hit. This map shows where some of the highest streamflow occurred. Data are provisional and subject to revision.
Mark R Dickman
Mark Dickman is a Associate Director for Data at the California Water Science Center.
Science and Products
Monitoring storm tide and flooding from Hurricane Irma along the U.S. Virgin Islands, Puerto Rico, and the Southeastern United States, September 2017
Hurricane Irma skirted the northern coasts of the U.S. Virgin Islands and Puerto Rico, with maximum sustained winds of 185 miles per hour (mi/h) on September 6, 2017. The hurricane first made landfall in Florida near Cudjoe Key, in the lower Florida Keys, with maximum sustained winds of 130 mi/h on September 10, 2017. The hurricane made a second Florida landfall on Marco Island, Florida, with maxi
Floods in California
Monitoring Storm Tide and Flooding From Hurricane Irma Along the U.S. Virgin Islands, Puerto Rico, and the Southeastern United States
California Streamgage Information
At atmospheric river brought heavy precipitation to California from December 31, 2022 through January 2, 2023. USGS crews took 77 measurements at 58 sites across the state, with northern California being hardest hit. This map shows where some of the highest streamflow occurred. Data are provisional and subject to revision.
High flows at streamgage 11172945 (Alameda Creek above Div Dam near Sunol, California) were captured by USGS hydrologic technician Louis Cannarozzi on 12/31/2022. Heavy precipitation caused higher-than-normal streamflow in many areas as an atmospheric river moved through northern California.
High flows at streamgage 11172945 (Alameda Creek above Div Dam near Sunol, California) were captured by USGS hydrologic technician Louis Cannarozzi on 12/31/2022. Heavy precipitation caused higher-than-normal streamflow in many areas as an atmospheric river moved through northern California.
Science and Products
Monitoring storm tide and flooding from Hurricane Irma along the U.S. Virgin Islands, Puerto Rico, and the Southeastern United States, September 2017
Hurricane Irma skirted the northern coasts of the U.S. Virgin Islands and Puerto Rico, with maximum sustained winds of 185 miles per hour (mi/h) on September 6, 2017. The hurricane first made landfall in Florida near Cudjoe Key, in the lower Florida Keys, with maximum sustained winds of 130 mi/h on September 10, 2017. The hurricane made a second Florida landfall on Marco Island, Florida, with maxi
Floods in California
Monitoring Storm Tide and Flooding From Hurricane Irma Along the U.S. Virgin Islands, Puerto Rico, and the Southeastern United States
California Streamgage Information
At atmospheric river brought heavy precipitation to California from December 31, 2022 through January 2, 2023. USGS crews took 77 measurements at 58 sites across the state, with northern California being hardest hit. This map shows where some of the highest streamflow occurred. Data are provisional and subject to revision.
At atmospheric river brought heavy precipitation to California from December 31, 2022 through January 2, 2023. USGS crews took 77 measurements at 58 sites across the state, with northern California being hardest hit. This map shows where some of the highest streamflow occurred. Data are provisional and subject to revision.
High flows at streamgage 11172945 (Alameda Creek above Div Dam near Sunol, California) were captured by USGS hydrologic technician Louis Cannarozzi on 12/31/2022. Heavy precipitation caused higher-than-normal streamflow in many areas as an atmospheric river moved through northern California.
High flows at streamgage 11172945 (Alameda Creek above Div Dam near Sunol, California) were captured by USGS hydrologic technician Louis Cannarozzi on 12/31/2022. Heavy precipitation caused higher-than-normal streamflow in many areas as an atmospheric river moved through northern California.