Arctic Air Spreads South and East from Rockies Friday through Next Week

Arctic air is plunging across the Rockies and Great Plains and will reach the Deep South and Great Lakes Saturday night, and the Eastern Seaboard by Sunday night, bringing dangerously cold wind chill temperatures. Snow and heavy winds could produce blizzard conditions in the Northern Plains Friday. There is a wintry mix expected in the Midwest/Northeast and rain for the Southeast into Saturday. Read More >

Hazardous Weather Conditions

Cold Weather Advisory in effect from January 18, 03:00 AM MST until January 18, 12:00 PM MST

Current conditions at

ST. MARY (SRYM8)

Lat: 48.74108°NLon: 113.43289°WElev: 4557.0ft.

2°F

-17°C

Humidity	69%
Wind Speed	NE 5 MPH
Barometer	NA
Dewpoint	-6°F (-21°C)
Visibility	NA
Wind Chill	-8°F (-22°C)
Last update	18 Jan 07:11 AM MST

More Information:

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

Extended Forecast for

St Mary MT

Cold Weather Advisory until January 18, 12:00pm

Click here for hazard details and duration

Cold Weather Advisory

Cold Weather Advisory until January 18, 12:00pm
NOW until 12:00pm Sat
Cold Weather Advisory
Today
High: 12 °F
Decreasing
Clouds
Tonight
Low: 8 °F
Increasing
Clouds
Sunday
High: 15 °F
Mostly Cloudy
Sunday Night
Low: -7 °F
Partly Cloudy
M.L.King Day
High: 18 °F
Sunny
Monday Night
Low: 13 °F
Mostly Cloudy
Tuesday
High: 26 °F
Partly Sunny
Tuesday Night
Low: 13 °F
Partly Cloudy

Detailed Forecast

Today

Mostly cloudy, then gradually becoming sunny, with a high near 12. Wind chill values as low as -10. North northeast wind around 6 mph becoming light and variable in the afternoon.

Tonight

Increasing clouds, with a steady temperature around 8. Wind chill values as low as -5. South southwest wind around 6 mph.

Sunday

Mostly cloudy, with a high near 15. Wind chill values as low as -5. West southwest wind 5 to 10 mph becoming north in the afternoon. Winds could gust as high as 21 mph.

Sunday Night

Partly cloudy, with a low around -7. Wind chill values as low as -15. North wind 5 to 8 mph becoming light and variable in the evening.

M.L.King Day

Sunny, with a high near 18. West southwest wind 6 to 14 mph, with gusts as high as 31 mph.

Monday Night

Mostly cloudy, with a low around 13. West southwest wind 16 to 18 mph, with gusts as high as 40 mph.

Tuesday

Partly sunny, with a high near 26. West southwest wind 14 to 18 mph, with gusts as high as 39 mph.

Tuesday Night

Partly cloudy, with a low around 13. West southwest wind 9 to 11 mph, with gusts as high as 28 mph.

Wednesday

Mostly sunny, with a high near 28.