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 >

Overview
Latest Forecast
24Hr Precipitation and High Temperature Outlook
Radar
Safety Tips
Storm Reports

Overview

Periods of moderate to heavy rainfall are expected through tomorrow evening. Flash flooding and debris flows will be possible, especially over burn scars, mountainous terrain, saturated soils, and narrow canyons. Prolonged periods of light to moderate rain are expected in the interim. An additional 0.5 to 2 inches of rain is expected. Additionally, strong to severe thunderstorms are possible, most likely across the Four Corners area, which could lead to even heavier rain rates, hail, and damaging winds.

Please see the map below for more information. If the map is not working, please go to detailed hazard viewer for the latest watches and warnings in effect.

Click on any area for more detailed information on each Warning, Watch or Advisory.

(Click on any Point on the Map for the latest Forecast)

Expected Precipitation

High Temperature Forecast

Flood Safety

GJT RSS Feed

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

Significant Rainfall Expected Through Thursday Night

Please see the map below for more information. If the map is not working, please go to detailed hazard viewer for the latest watches and warnings in effect.