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.

46°F

8°C

Humidity	43%
Wind Speed	NW 17 G 24 mph
Barometer	29.95 in
Dewpoint	25°F (-4°C)
Visibility	10.00 mi
Wind Chill	39°F (4°C)
Last update	8 Dec 2:15 pm MST

More Information:

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

Extended Forecast for

3 Miles WNW Whitewood SD

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

Click here for hazard details and duration

High Wind Warning

This Afternoon
High: 46 °F
Partly Sunny
and Breezy
Tonight
Low: 38 °F⇑
Slight Chance
Rain and
Breezy
Tuesday
High: 50 °F⇓
Windy. Rain
Likely then
Rain/Snow
Likely
Tuesday Night
Low: 29 °F
Chance Snow
and Blustery
Wednesday
High: 40 °F
Snow then
Rain/Snow
Wednesday Night
Low: 28 °F
Rain then
Rain/Snow
Thursday
High: 35 °F
Rain/Snow
Likely then
Snow Likely
Thursday Night
Low: 8 °F
Snow Likely
Friday
High: 15 °F
Chance Snow

Detailed Forecast

This Afternoon

Partly sunny, with a high near 46. Breezy, with a west wind 18 to 23 mph, with gusts as high as 34 mph.

Tonight

A 20 percent chance of rain after 11pm. Mostly cloudy, with a temperature rising to around 43 by 5am. Breezy, with a west wind 13 to 18 mph increasing to 19 to 24 mph after midnight. Winds could gust as high as 33 mph.

Tuesday

Rain likely before 4pm, then snow likely, possibly mixed with rain. Partly sunny, with a temperature rising to near 50 by 10am, then falling to around 37 during the remainder of the day. Windy, with a west wind 29 to 36 mph, with gusts as high as 55 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

Tuesday Night

A 30 percent chance of snow, mainly before 11pm. Mostly cloudy, with a low around 29. Blustery, with a northwest wind 20 to 25 mph decreasing to 13 to 18 mph after midnight. Winds could gust as high as 39 mph.

Wednesday

Snow before noon, then rain and snow between noon and 3pm, then rain after 3pm. High near 40. Southwest wind 8 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Wednesday Night

Rain before 4am, then snow, possibly mixed with rain. Low around 28. West wind 13 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Thursday

Rain and snow likely, becoming all snow after 7am. Mostly cloudy, with a high near 35. Northwest wind 11 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.

Thursday Night

Snow likely. Cloudy, with a low around 8. Northwest wind around 14 mph, with gusts as high as 23 mph.

Friday

A chance of snow. Mostly cloudy, with a high near 15.

Friday Night

A chance of snow. Mostly cloudy, with a low around 8.

Saturday

A chance of snow. Partly sunny, with a high near 26.

Saturday Night

A slight chance of snow. Partly cloudy, with a low around 14.

Sunday

Mostly sunny, with a high near 42.