Super Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather Threat from the Central Plains to the Great Lakes

Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, and thunderstorms to the Marianas Islands into Wednesday. Tropical Storm conditions are likely over Guam. Severe thunderstorms and heavy rain are likely across the Upper Mississippi Valley and Great Lakes region with potential for large to very large hail, damaging wind, and tornadoes through Tuesday. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Partly Cloudy

43°F

6°C

Humidity	93%
Wind Speed	Calm
Barometer	29.75 in
Dewpoint	41°F (5°C)
Visibility	10.00 mi
Last update	13 Apr 5:55 am MDT

More Information:

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

Extended Forecast for

9 Miles SSW Lead SD

Today
High: 57 °F
Mostly Sunny
then Severe
Thunderstorms
Tonight
Low: 32 °F
Mostly Clear
Tuesday
High: 54 °F
Partly Sunny
then Chance
Showers
Tuesday Night
Low: 33 °F
Slight Chance
Showers then
Mostly Clear
Wednesday
High: 59 °F
Sunny then
Slight Chance
Showers
Wednesday Night
Low: 41 °F
Mostly Clear
Thursday
High: 59 °F
Mostly Sunny
then Showers
Likely
Thursday Night
Low: 18 °F
Rain/Snow
then Snow
Showers
Likely
Friday
High: 30 °F
Snow Showers
Likely

Detailed Forecast

Today

A 30 percent chance of showers and thunderstorms, mainly between 2pm and 4pm. Some of the storms could be severe. Mostly sunny, with a high near 57. Southwest wind 6 to 14 mph, with gusts as high as 30 mph.

Tonight

Mostly clear, with a low around 32. West wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 28 mph.

Tuesday

A 30 percent chance of showers after noon. Partly sunny, with a high near 54. Light and variable wind becoming west around 6 mph. Winds could gust as high as 17 mph.

Tuesday Night

A 20 percent chance of showers before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 33. Light and variable wind. Winds could gust as high as 15 mph.

Wednesday

A 20 percent chance of showers after noon. Sunny, with a high near 59. West wind 3 to 7 mph. Winds could gust as high as 20 mph.

Wednesday Night

Mostly clear, with a low around 41. Southwest wind 6 to 10 mph, with gusts as high as 28 mph.

Thursday

Showers likely after noon. Mostly sunny, with a high near 59. Southwest wind 9 to 11 mph, with gusts as high as 33 mph. Chance of precipitation is 60%.

Thursday Night

Rain showers before 9pm, then snow showers. Mostly cloudy, with a low around 18. Northwest wind 11 to 13 mph, with gusts as high as 33 mph.

Friday

Snow showers likely. Mostly cloudy, with a high near 30.

Friday Night

A chance of snow showers, mainly before midnight. Mostly cloudy, with a low around 16.

Saturday

A chance of snow showers. Mostly sunny, with a high near 39.

Saturday Night

Partly cloudy, with a low around 23.

Sunday

Sunny, with a high near 56.