Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

Hazardous Weather Conditions

Current conditions at

BIG SHEEP MOUNTAIN (LCFM8)

Lat: 47.02819°NLon: 105.80472°WElev: 3172.0ft.

42°F

6°C

Humidity	66%
Wind Speed	WSW 18 MPH
Barometer	NA
Dewpoint	31°F (-1°C)
Visibility	NA
Wind Chill	34°F (1°C)
Last update	09 Dec 03:08 AM MST

More Information:

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

Extended Forecast for

10 Miles NW Rock Springs MT

Winter Weather Advisory December 9, 04:11am until December 9, 02:00pm

High Wind Warning December 9, 04:11am until December 9, 05:00pm

Click here for hazard details and duration

Winter Weather Advisory

High Wind Warning

Winter Weather Advisory December 9, 04:11am until December 9, 02:00pm
High Wind Warning December 9, 04:11am until December 9, 05:00pm
NOW: Multiple hazards in effect
Click HERE for Details
Overnight
Low: 43 °F
Rain Likely
and Breezy
Tuesday
High: 44 °F⇓
Very Windy.
Chance Rain
then Mostly
Sunny
Tuesday Night
Low: 23 °F
Increasing
Clouds
Wednesday
High: 40 °F
Snow then
Rain/Snow
Wednesday Night
Low: 29 °F
Rain Likely
Thursday
High: 38 °F
Rain/Snow
Likely
Thursday Night
Low: -4 °F
Snow Likely
Friday
High: 5 °F
Snow Likely

Detailed Forecast

Overnight

Rain likely, mainly before 5am. Cloudy, with a steady temperature around 43. Breezy, with a west southwest wind around 29 mph, with gusts as high as 41 mph. Chance of precipitation is 60%.

Tuesday

A 40 percent chance of rain, mainly before 9am. Cloudy, then gradually becoming mostly sunny, with a temperature rising to near 44 by 8am, then falling to around 36 during the remainder of the day. Very windy, with a west northwest wind 38 to 43 mph decreasing to 28 to 33 mph. Winds could gust as high as 60 mph.

Tuesday Night

Increasing clouds, with a low around 23. West northwest wind 15 to 20 mph becoming west northwest 6 to 11 mph after midnight. Winds could gust as high as 28 mph.

Wednesday

Snow before 2pm, then rain. High near 40. South wind 7 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

Wednesday Night

Rain likely, mainly between 11pm and 5am. Cloudy, with a low around 29. South southwest wind 11 to 13 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%.

Thursday

Snow likely before 8am, then rain and snow likely between 8am and 2pm, then snow likely after 2pm. Cloudy, with a high near 38. West wind 11 to 18 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

Thursday Night

Snow likely, mainly before 11pm. Cloudy, with a low around -4. North northwest wind 13 to 18 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

Friday

Snow likely, mainly after 11am. Cloudy, with a high near 5. North wind 7 to 10 mph becoming east in the afternoon. Chance of precipitation is 70%.

Friday Night

Snow likely. The snow could be heavy at times. Cloudy, with a low around -9. Northeast wind 8 to 10 mph. Chance of precipitation is 70%.

Saturday

A 30 percent chance of snow before 11am. Mostly cloudy, with a high near 7. North northeast wind 7 to 9 mph becoming southwest in the morning.

Saturday Night

Mostly cloudy, with a low around -5. South southeast wind 7 to 10 mph.

Sunday

Partly sunny, with a high near 32.

Sunday Night

Mostly cloudy, with a low around 17.