National Weather Service United States Department of Commerce

Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Drought typically refers to deficiency in precipitation, relative to the local area's climate, which persists over a period of time such that it causes a water shortage. This water shortage may impact streams & rivers, local water supplies, and agriculture.

Drought Information
 

The U.S. Drought Monitor
Static images. Overview of drought types and drought impacts updated weekly based upon a combination of sources.

Drought indeces
Static images. Derived from model output.

Fire weather forecasts
Static images. National forecasts of fire weather conditions from the NWS Storm Prediction Center

Severe Fire Potential Mapping System
Interactive maps of current fires and fire potential from the US Forecast Service.

CPC last month soil moisture percentile
Static images, no QC. Updated hourly. Raw model output should be used with caution.

CPC last month runoff percentile
Static images, no QC. Updated hourly. Raw model output should be used with caution.

CPC last month evaporation percentile
Static images, no QC. Updated hourly. Raw model output should be used with caution.