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.

Fair

34°F

1°C

Humidity	75%
Wind Speed	W 20 G 29 mph
Barometer	30.03 in
Dewpoint	27°F (-3°C)
Visibility	10.00 mi
Wind Chill	23°F (-5°C)
Last update	9 Dec 11:15 pm MST

More Information:

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

Extended Forecast for

4 Miles W Lead SD

Tonight
Low: 21 °F
Chance Snow
and Blustery
Wednesday
High: 38 °F
Snow Likely
then Wintry
Mix Likely
Wednesday Night
Low: 34 °F⇑
Rain Likely
then Chance
Rain/Snow
Thursday
High: 41 °F⇓
Chance
Rain/Snow
then
Rain/Snow
Thursday Night
Low: 15 °F
Snow
Friday
High: 16 °F
Snow
Friday Night
Low: 7 °F
Snow Likely
Saturday
High: 16 °F
Chance Snow
Saturday Night
Low: 9 °F
Slight Chance
Snow then
Partly Cloudy

Detailed Forecast

Tonight

A 30 percent chance of snow, mainly before 3am. Mostly cloudy, with a low around 21. Wind chill values as low as 9. Blustery, with a northwest wind 14 to 23 mph, with gusts as high as 34 mph.

Wednesday

Snow likely, possibly mixed with sleet before 4pm, then rain likely between 4pm and 5pm, then rain likely, possibly mixed with snow after 5pm. Mostly cloudy, with a high near 38. Wind chill values as low as 11. Southwest wind 5 to 9 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New snow and sleet accumulation of less than a half inch possible.

Wednesday Night

Rain likely before 4am, then a chance of rain and snow between 4am and 5am, then a chance of rain after 5am. Cloudy, with a temperature rising to around 38 by 2am. West wind around 16 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

Thursday

Rain, possibly mixed with snow, mainly after 5pm. Temperature rising to near 41 by 8am, then falling to around 34 during the remainder of the day. West wind 10 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Thursday Night

Snow. Low around 15. Northwest wind 10 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

Friday

Snow. Steady temperature around 16. Northwest wind 5 to 7 mph becoming northeast in the afternoon. Winds could gust as high as 16 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

Friday Night

Snow likely. Mostly cloudy, with a low around 7. South wind around 7 mph becoming northwest 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 16. Northwest wind 3 to 6 mph. Winds could gust as high as 16 mph.

Saturday Night

A slight chance of snow before 11pm. Partly cloudy, with a low around 9.

Sunday

Mostly sunny, with a high near 39.

Sunday Night

Partly cloudy, with a low around 25.

Monday

Mostly sunny, with a high near 40.

Monday Night

Partly cloudy, with a low around 26.