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
Floods in California
Throughout the nation, the USGS operates a streamgage network in near real-time that helps emergency managers and others protect life and property due to floods and other water-related hazards. The USGS California Water Science Center maintains nearly 500 streamgages that provides key streamflow and water level data for flood forecasters, the public, and emergency managers at the federal, state...
Monitoring Storm Tide and Flooding From Hurricane Irma Along the U.S. Virgin Islands, Puerto Rico, and the Southeastern United States
The U.S. Geological Survey (USGS), in cooperation with the Federal Emergency Management Agency, deployed a temporary monitoring network of storm-surge and barometric pressure sensors at 249 locations along the Puerto Rico, Florida, Georgia, and South Carolina coasts to record the timing, areal extent, and magnitude of hurricane storm tide and coastal flooding generated by Hurricane Irma.
Guidance and Instructions for the Preparation of Data Furnished to the USGS for Review and Publication
The annual review by USGS personnel of furnished records is designed to ensure that furnished records are collected in accordance with USGS standards. Furnished records are provided to the USGS by Federal Energy Regulatory Commission (FERC) licensees and other cooperating agencies as a method for reviewing and quality assuring their records so that the data are collected using methods that result...
California Streamgage Information
To help emergency managers and others protect life and property due to floods and other water-related hazards, the USGS delivers a continuous source of streamflow information. The U.S. Geological Survey has been measuring streamflow in the U.S. for over 120 years. We operate more than 7,500 streamgages in the U.S. and nearly 500 in California that collect data to determine the amount of water...
High streamflow measured across California during New Year's storm
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 flow at USGS streamgage 11172945 on Alameda Creek, 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.
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
Floods in California
Throughout the nation, the USGS operates a streamgage network in near real-time that helps emergency managers and others protect life and property due to floods and other water-related hazards. The USGS California Water Science Center maintains nearly 500 streamgages that provides key streamflow and water level data for flood forecasters, the public, and emergency managers at the federal, state...
Monitoring Storm Tide and Flooding From Hurricane Irma Along the U.S. Virgin Islands, Puerto Rico, and the Southeastern United States
The U.S. Geological Survey (USGS), in cooperation with the Federal Emergency Management Agency, deployed a temporary monitoring network of storm-surge and barometric pressure sensors at 249 locations along the Puerto Rico, Florida, Georgia, and South Carolina coasts to record the timing, areal extent, and magnitude of hurricane storm tide and coastal flooding generated by Hurricane Irma.
Guidance and Instructions for the Preparation of Data Furnished to the USGS for Review and Publication
The annual review by USGS personnel of furnished records is designed to ensure that furnished records are collected in accordance with USGS standards. Furnished records are provided to the USGS by Federal Energy Regulatory Commission (FERC) licensees and other cooperating agencies as a method for reviewing and quality assuring their records so that the data are collected using methods that result...
California Streamgage Information
To help emergency managers and others protect life and property due to floods and other water-related hazards, the USGS delivers a continuous source of streamflow information. The U.S. Geological Survey has been measuring streamflow in the U.S. for over 120 years. We operate more than 7,500 streamgages in the U.S. and nearly 500 in California that collect data to determine the amount of water...
High streamflow measured across California during New Year's storm
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 flow at USGS streamgage 11172945 on Alameda Creek, 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.
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.