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 >

Customize Your Weather.gov

LOADING...
About This Page Font:  A   A   A  
About This Page Font:  A   A   A  

Low bandwidth users: Enter state and zone here for Fire Weather Forecast:

Click map for Forecast and Color/Point Forecast Matrices, or enter coordinates:


Additional overlays: Fire Perimeters | RADAR | RAWS Observations |
 

 

 
 
 
 
 

There are 2 ways to get information from this map:

  • Entering a lat/lon in decimal degrees in the appropriate boxes.
  • Clicking on the map.

After that, 3 or 4 tabs will open up below the map:

  • If there are Red Flag Warnings or Fire Weather Watches on the clicked area, the text for those will show up in the first tab. Otherwise this tab will not show up.
  • A tab with the Fire Weather Forecast Discussion and the forecast for the Fire Weather Zone clicked upon will be in the second tab.
  • A color coded Fire Weather Matrix will show up in the next tab. Some offices have created custom thresholds for the matrix. Otherwise, "default" parameters will be used. Note: This information covers the area on the map within the "green square".
  • The final tab has a 3 hourly point forecast matrix for the next 6 days. Note: This information covers the area on the map within the "green square".
  • Sometimes, a second click is required to get the map to react.

If you have feedback, questions, or notice issues with the products or data, send an email to the local office. Their contact information can be found at the bottom of this page.

If you have feedback, questions, or notice issues of a technical nature, send an email to wr.web.support@noaa.gov