Hydrologic Conditions Update and Outlook for 2013-14 Flood Season December 2013 Hydrology and Flood Operations Office Division of Flood Management Department.

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Presentation transcript:

Hydrologic Conditions Update and Outlook for Flood Season December 2013 Hydrology and Flood Operations Office Division of Flood Management Department of Water Resources

Overview Precipitation Runoff Storage Outlook

California Climate Tracker – Calendar Year Precipitation (Jan-Nov) Sierra Region Summer Monsoon Influence Red is Record Dry 8-Station Index and 5-Station Index on track for record low totals Statewide average accumulation record low

Runoff – Water Year Perspective Sacramento 4 Rivers Index Below Normal in WY 2012 and Dry in WY 2013 San Joaquin 4 Rivers Index Dry in WY 2012 and Critically Dry in WY 2013 April-July runoff below average for both basins for past 2 years

Sacramento WY versus Apr-July Runoff Volumes April-July Runoff Volume (MAF) Water Year Runoff Volume (MAF) WY

San Joaquin WY versus Apr-July Runoff Volumes April-July Runoff Volume (MAF) Water Year Runoff Volume (MAF) WY 2012 WY

Reservoir Storage WY Present

U. S. Outlook – Climate Prediction Center January 2014

U. S. Seasonal Outlook – Climate Prediction Center January 2014 – March 2014

California Outlook No clear climate signal due to neutral El Niño Southern Oscillation conditions DWR Experimental Forecast suggests dry winter with possible Spring improvement if El Niño continues to develop

Flood Forecasting Authority - California Water Code (Section 236) DWR in joint collaboration with National Weather Service’s (NWS) California-Nevada River Forecast Center (CNRFC) – Provide year-round daily forecasts of reservoir inflows, river flows, and water levels throughout California – Issue river and tide Forecast for 94 locations in California, parts of Nevada Forecasts used by the Flood Operations Center to determine the level of joint Federal-State flood response activation and operations

Operations Schedule Winter Mode [~October 15 th to April 15 th ] Weekdays: Forecasts issued by 9:00 AM and 3:00 PM Weekends: Forecast issued by 9:00 AM Summer Mode [~April 15 th to October 15 th ] Forecasts issued by 9:00 AM daily Flooding - Forecasts also issued at 9:00 PM & 3:00 AM

Weather and Hydrology briefings –During flood season (mid-October – mid-April) –Joint effort between DWR and CNFRC –Information sharing and coordination between State & Federal Partners

Public California Data Exchange (CDEC access) Agency access - To Apply Webcast Weather/Hydrology Briefings – California Nevada River Forecast Center Information and Contacts

Questions?

Sudhakar Talanki, PE Chief, River Forecasting Section Hydrology Branch Hydrology and Flood Operations Office Division of Flood Management Department of Water Resources

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