Dangerous Cold Weather for Most of the Country; Rare Winter Storm for the South; Fire Weather Concerns for Southern California

Arctic air will filter south and east through early this week. As this cold air moves across the South, a rare winter storm is forecast to develop from Texas, Gulf Coast States into the Southeast through early this week. Several new daily record low temperatures are expected, including new record-low maximum temperatures. For Southern California, fire weather concerns increase this week. Read More >

Hazardous Weather Conditions

Cold Weather Advisory until January 21, 11:00 AM MST

Current conditions at

Henry's Lake (ITD55)

Lat: 44.61831°NLon: 111.33548°WElev: 6617.0ft.

50°F

10°C

Humidity	46%
Wind Speed	ESE 17 MPH
Barometer	NA
Dewpoint	30°F (-1°C)
Visibility	NA
Wind Chill	44°F (7°C)
Last update	21 Jan 05:15 AM MST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

10 Miles WNW West Yellowstone MT

Cold Weather Advisory January 21, 05:54am until January 21, 11:00am

Click here for hazard details and duration

...

Cold Weather Advisory January 21, 05:54am until January 21, 11:00am
NOW until 11:00am Tue
Cold Weather Advisory
Today
High: 5 °F
Cold
Tonight
Low: 2 °F
Slight Chance
Snow
Wednesday
High: 12 °F
Chance Snow
then Mostly
Sunny
Wednesday Night
Low: -4 °F
Mostly Clear
Thursday
High: 11 °F
Mostly Sunny
Thursday Night
Low: 4 °F
Slight Chance
Snow
Friday
High: 13 °F
Snow
Friday Night
Low: -1 °F
Snow Likely

Detailed Forecast

Today

Partly sunny and cold, with a high near 5. Wind chill values as low as -30. Southwest wind 16 to 18 mph, with gusts as high as 25 mph.

Tonight

A 20 percent chance of snow. Partly cloudy, with a steady temperature around 2. Wind chill values as low as -15. Southwest wind 10 to 15 mph, with gusts as high as 18 mph.

Wednesday

A 30 percent chance of snow before 11am. Mostly sunny, with a high near 12. Wind chill values as low as -15. Northwest wind 8 to 11 mph, with gusts as high as 18 mph. New snow accumulation of less than a half inch possible.

Wednesday Night

Mostly clear, with a low around -4. Wind chill values as low as -15. West northwest wind 6 to 10 mph.

Thursday

Mostly sunny, with a high near 11. West northwest wind 6 to 11 mph becoming south southwest in the morning. Winds could gust as high as 18 mph.

Thursday Night

A 20 percent chance of snow after 11pm. Mostly cloudy, with a low around 4. South wind around 15 mph, with gusts as high as 20 mph.

Friday

Snow. High near 13. South southwest wind 9 to 13 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Friday Night

Snow likely, mainly before 11pm. Mostly cloudy, with a low around -1. North wind 10 to 18 mph, with gusts as high as 22 mph.

Saturday

A chance of snow, mainly before 11am. Partly sunny, with a high near 7.