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 >

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Overcast

45°F

7°C

Humidity	46%
Wind Speed	W 14 G 21 mph
Barometer	29.92 in
Dewpoint	25°F (-4°C)
Visibility	10.00 mi
Wind Chill	39°F (4°C)
Last update	8 Dec 5:55 am MST

More Information:

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

Extended Forecast for

4 Miles S Lead SD

Today
High: 36 °F⇓
Slight Chance
Snow then
Mostly Sunny
Tonight
Low: 29 °F⇑
Chance Snow
Tuesday
High: 40 °F⇓
Rain/Snow
Likely
Tuesday Night
Low: 21 °F
Chance Snow
Wednesday
High: 36 °F
Snow
Wednesday Night
Low: 23 °F
Snow
Thursday
High: 30 °F
Snow Likely
Thursday Night
Low: 5 °F
Snow Likely
Friday
High: 15 °F
Snow Likely

Detailed Forecast

Today

A 20 percent chance of snow before 8am. Mostly sunny, with a temperature rising to near 36 by 8am, then falling to around 30 during the remainder of the day. West wind 9 to 13 mph, with gusts as high as 33 mph.

Tonight

A 30 percent chance of snow after 11pm. Mostly cloudy, with a temperature rising to around 32 by 5am. Wind chill values as low as 19. West wind 8 to 14 mph, with gusts as high as 29 mph.

Tuesday

A chance of rain before 10am, then rain and snow likely between 10am and 2pm, then snow likely after 2pm. Partly sunny, with a temperature rising to near 40 by 11am, then falling to around 28 during the remainder of the day. Wind chill values as low as 16. West wind 15 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. 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 21. Wind chill values as low as 12. Northwest wind 13 to 18 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 28 mph.

Wednesday

Snow. High near 36. Southwest wind around 6 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

Wednesday Night

Snow. Low around 23. West wind 9 to 11 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

Thursday

Snow likely. Mostly cloudy, with a high near 30. Northwest wind 6 to 9 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

Thursday Night

Snow likely. Mostly cloudy, with a low around 5. Northwest wind around 7 mph, with gusts as high as 21 mph.

Friday

Snow likely, mainly before 11am. Mostly cloudy, with a high near 15.

Friday Night

A chance of snow. Mostly cloudy, with a low around 6.

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.