Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

A strong atmospheric river will bring prolonged heavy rainfall along with gusty winds to the Pacific Northwest through much of this week. The heavy rainfall may lead to widespread urban and river flooding. Accumulating snow is expected over parts of the central Appalachians and Mid-Atlantic today as well as the Upper Midwest and the Upper Great Lakes this evening into Tuesday. Read More >

Hazardous Weather Conditions

High Wind Warning in effect from December 9, 08:00 AM MST until December 10, 02:00 AM MST

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Fair

45°F

7°C

Humidity	43%
Wind Speed	W 14 mph
Barometer	29.94 in
Dewpoint	23°F (-5°C)
Visibility	10.00 mi
Wind Chill	39°F (4°C)
Last update	8 Dec 3:35 pm MST

More Information:

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

Extended Forecast for

3 Miles NE Spearfish SD

High Wind Warning December 9, 08:00am until December 10, 02:00am

Click here for hazard details and duration

High Wind Warning

Tonight
Low: 39 °F⇑
Mostly Cloudy
then Mostly
Cloudy and
Breezy
Tuesday
High: 49 °F⇓
Rain Likely
and Windy
Tuesday Night
Low: 28 °F
Mostly Cloudy
and Breezy
then Mostly
Cloudy
Wednesday
High: 41 °F
Snow then
Rain/Snow
Wednesday Night
Low: 40 °F
Rain
Thursday
High: 42 °F
Rain Likely
then
Rain/Snow
Likely
Thursday Night
Low: 9 °F
Snow Likely
Friday
High: 15 °F
Snow Likely
Friday Night
Low: 9 °F
Chance Snow

Detailed Forecast

Tonight

Mostly cloudy, with a temperature falling to near 39 by midnight, then rising to around 45 during the remainder of the night. Breezy, with a west wind 14 to 23 mph, with gusts as high as 32 mph.

Tuesday

Rain likely, mainly after 11am. Mostly cloudy, with a temperature rising to near 49 by 10am, then falling to around 38 during the remainder of the day. Windy, with a west wind 28 to 36 mph, with gusts as high as 55 mph. Chance of precipitation is 60%.

Tuesday Night

Mostly cloudy, with a low around 28. Wind chill values as low as 19. Breezy, with a west wind 21 to 26 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 43 mph.

Wednesday

Snow before 1pm, then rain and snow between 1pm and 2pm, then rain after 2pm. High near 41. Wind chill values as low as 20. Southwest wind 8 to 15 mph becoming southeast in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Wednesday Night

Rain. Steady temperature around 40. West wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.

Thursday

Rain and snow likely, becoming all snow after 4pm. Cloudy, with a high near 42. West wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

Thursday Night

Snow likely. Cloudy, with a low around 9. Northwest wind 11 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.

Friday

Snow likely, mainly before 11am. Cloudy, with a high near 15. Northwest wind around 9 mph becoming east in the afternoon. Winds could gust as high as 16 mph.

Friday Night

A chance of snow. Cloudy, with a low around 9.

Saturday

A slight chance of snow before 11am. Mostly cloudy, with a high near 25.

Saturday Night

Mostly cloudy, with a low around 14.

Sunday

Partly sunny, with a high near 41.

Sunday Night

Partly cloudy, with a low around 26.

Monday

Mostly sunny, with a high near 41.