Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Spearfish / Clyde Ice (KSPF)

Lat: 44.48°NLon: 103.78°WElev: 3898ft.

Mostly Cloudy

34°F

1°C

Humidity	81%
Wind Speed	W 14 G 22 mph
Barometer	30.01 in
Dewpoint	28°F (-2°C)
Visibility	10.00 mi
Wind Chill	25°F (-4°C)
Last update	9 Dec 9:55 pm MST

More Information:

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

Extended Forecast for

4 Miles SE Deadwood SD

Tonight
Low: 23 °F
Chance Snow
Wednesday
High: 42 °F
Snow Likely
then
Rain/Snow
Likely
Wednesday Night
Low: 36 °F⇑
Rain Likely
then Chance
Rain/Snow
Thursday
High: 49 °F⇓
Chance Rain
then Rain
Thursday Night
Low: 15 °F
Rain/Snow
then Snow
Friday
High: 22 °F
Snow
Friday Night
Low: 5 °F
Snow Likely
Saturday
High: 19 °F
Chance Snow
Saturday Night
Low: 8 °F
Partly Cloudy

Detailed Forecast

Tonight

A 30 percent chance of snow, mainly before 3am. Mostly cloudy, with a low around 23. Wind chill values as low as 14. Northwest wind 13 to 17 mph, with gusts as high as 40 mph.

Wednesday

Snow likely before 3pm, then snow likely, possibly mixed with rain between 3pm and 4pm, then rain likely after 4pm. Mostly cloudy, with a high near 42. Wind chill values as low as 14. Southwest wind 5 to 8 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

Wednesday Night

Rain likely before 4am, then a chance of rain and snow. Mostly cloudy, with a temperature falling to near 36 by 11pm, then rising to around 42 during the remainder of the night. West wind around 11 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

Thursday

Rain, mainly after 5pm. Temperature rising to near 49 by 11am, then falling to around 39 during the remainder of the day. Northwest wind around 11 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.

Thursday Night

Rain and snow, becoming all snow after 7pm. Low around 15. Northwest wind 9 to 13 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

Friday

Snow. High near 22. Northwest wind 5 to 7 mph becoming light and variable in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

Friday Night

Snow likely. Cloudy, with a low around 5. East wind around 6 mph becoming north after midnight. Winds could gust as high as 16 mph. Chance of precipitation is 70%.

Saturday

A chance of snow, mainly before 11am. Partly sunny, with a high near 19. North wind around 6 mph becoming west in the afternoon. Winds could gust as high as 17 mph.

Saturday Night

Partly cloudy, with a low around 8.

Sunday

Mostly sunny, with a high near 44.

Sunday Night

Partly cloudy, with a low around 26.

Monday

Mostly sunny, with a high near 45.

Monday Night

Partly cloudy, with a low around 28.

Tuesday

A slight chance of rain and snow. Mostly sunny, with a high near 47.