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.

Overcast and Breezy

37°F

3°C

Humidity	60%
Wind Speed	NW 22 G 37 mph
Barometer	29.95 in
Dewpoint	25°F (-4°C)
Visibility	10.00 mi
Wind Chill	26°F (-3°C)
Last update	9 Dec 7:15 pm MST

More Information:

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

Extended Forecast for

5 Miles S Lead SD

Tonight
Low: 21 °F
Slight Chance
Snow and
Blustery then
Partly Cloudy
Wednesday
High: 40 °F
Snow Likely
then Wintry
Mix Likely
Wednesday Night
Low: 34 °F⇑
Rain Likely
Thursday
High: 45 °F⇓
Chance Rain
then
Rain/Snow
Thursday Night
Low: 14 °F
Snow
Friday
High: 22 °F
Snow
Friday Night
Low: 5 °F
Snow Likely
Saturday
High: 20 °F
Chance Snow
Saturday Night
Low: 8 °F
Partly Cloudy

Detailed Forecast

Tonight

A 20 percent chance of snow before 10pm. Mostly cloudy, with a low around 21. Wind chill values as low as 9. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 43 mph.

Wednesday

Snow likely before 3pm, then snow likely, possibly mixed with rain and sleet between 3pm and 4pm, then rain likely, possibly mixed with snow after 4pm. Mostly cloudy, with a high near 40. Wind chill values as low as 11. Southwest wind 5 to 7 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, mainly before 11pm. Mostly cloudy, with a temperature rising to around 38 by 2am. West wind around 10 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

Thursday

A chance of rain before 3pm, then rain, possibly mixed with snow. Temperature rising to near 45 by 11am, then falling to around 36 during the remainder of the day. West wind around 10 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Thursday Night

Snow. Low around 14. Northwest wind 7 to 10 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

Friday

Snow. High near 22. Northwest wind around 5 mph becoming light and variable 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 5. Light and variable wind becoming southwest around 5 mph in the evening. 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 20. Northwest wind 3 to 6 mph. Winds could gust as high as 17 mph.

Saturday Night

Partly cloudy, with a low around 8.

Sunday

Mostly sunny, with a high near 42.

Sunday Night

Partly cloudy, with a low around 25.

Monday

Mostly sunny, with a high near 42.

Monday Night

Partly cloudy, with a low around 26.