Heat Builds in the West; Severe Thunderstorms and Heavy Rain in the Upper Midwest and Mid-Mississippi Valley; Extremely Critical Fire Weather in the Northwest on Saturday

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Severe thunderstorms and heavy rainfall are expected over parts of the Upper Midwest to mid-Mississippi Valley today. Critical to extremely critical fire weather conditions from the Northwest and the northern Great Basin on Saturday and Sunday. 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. The first set of images are the 24 hour maximums for days 1, 2, and 3. The second set of images are each valid for a 6 hour time period out to 66 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.

Day 1 Maximum	Day 2 Maximum	Day 3 Maximum

0 Hour	6 Hour	12 Hour

18 Hour	24 Hour	30 Hour

36 Hour	42 Hour	48 Hour

54 Hour	60 Hour	66 Hour

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

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