National Weather Service United States Department of Commerce

Inclement Weather For California; Fire Weather Threat In The High Plains

A strong storm and frontal system will move through Central and Southern California over the next two days, perhaps lingering through midweek. Expect heavy snowfall across the Sierra into the Southern California mountains and heavy rainfall which may cause flooding and debris flows in Southern California. There is an elevated to critical fire weather risk across the Southern High Plains. Read More >

Cold Advisory For Newborn Livestock (CANL)

The CANL graphics below show the risk of cold exposure to newborn livestock. The risk is related to wind chill temperature, precipitation, and humidity, and ranges from "NONE" for no risk, to "EXTREME" for rare and particularly dangerous situations. For more information click here for the product fact sheet. The images below are each valid for a 6 hour time period out to 36 hours. Click on the images to expand and see the forecast valid time. The CANL images are updated at least twice daily at 5 am and 5 pm.
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  • NONE: Wind Chill above 41 degrees
  • SLIGHT: Wind Chill less than 41 degrees for two or more hours
  • MILD: Wind Chill less than 32 degrees for two or more hours
  • MODERATE: Wind Chill less than 0 degrees for two or more hours or Wind Chill less than 36 degrees for two or more hours and .02" precipitation
  • SEVERE: Wind Chill of -9 degrees or colder for two or more hours, or wind chill of less than 34 degrees for two or more hours and .05" of precipitation
  • EXTREME: Wind Chill of -18 or colder for two or more hours, or wind chill less than 32 degrees for two or more hours and .1" of precipitation
  • For sunny conditions (Cloud cover less than 40%), reduce wind chill thresholds by 10 degrees 
  • For humid conditions (Minimum relative humidity remaining above 95%), increase wind chill thresholds by 10 degrees
  • For dry snow conditions (Maximum temperature remains less than 26F), double the precipitation thresholds for MOD-EXTREME