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

4 Miles SW North Spearfish SD

Today
High: 62 °F
Mostly Sunny
then Severe
Thunderstorms
and Breezy
Tonight
Low: 41 °F
Slight Chance
T-storms then
Mostly Clear
Tuesday
High: 57 °F
Mostly Sunny
then Chance
Showers
Tuesday Night
Low: 42 °F
Mostly Clear
Wednesday
High: 62 °F
Sunny then
Slight Chance
Showers
Wednesday Night
Low: 49 °F
Mostly Clear
then Partly
Cloudy and
Breezy
Thursday
High: 61 °F
Breezy.
Mostly Sunny
then Chance
Showers
Thursday Night
Low: 25 °F
Blustery.
Rain/Snow
then Snow
Showers
Friday
High: 33 °F
Snow Showers
Likely and
Breezy

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 62. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 29 mph.

Tonight

A slight chance of showers before 9pm, then a slight chance of showers and thunderstorms between 9pm and midnight. Mostly clear, with a low around 41. Southwest wind 8 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

Tuesday

A 30 percent chance of showers after noon. Mostly sunny, with a high near 57. West wind 6 to 9 mph becoming north in the afternoon. Winds could gust as high as 15 mph.

Tuesday Night

Mostly clear, with a low around 42. North wind 6 to 9 mph becoming south in the evening. Winds could gust as high as 15 mph.

Wednesday

A 20 percent chance of showers after noon. Sunny, with a high near 62. South wind 7 to 9 mph becoming west in the afternoon. Winds could gust as high as 17 mph.

Wednesday Night

Partly cloudy, with a low around 49. Breezy, with a southwest wind 8 to 13 mph increasing to 17 to 22 mph after midnight. Winds could gust as high as 28 mph.

Thursday

A 50 percent chance of showers after noon. Partly sunny, with a high near 61. Breezy, with a southwest wind 16 to 25 mph becoming northwest in the afternoon. Winds could gust as high as 33 mph.

Thursday Night

Rain and snow showers, becoming all snow after midnight. Mostly cloudy, with a low around 25. Blustery, with a northwest wind 22 to 24 mph, with gusts as high as 29 mph.

Friday

Snow showers likely. Mostly cloudy, with a high near 33. Breezy.

Friday Night

A chance of snow showers, mainly before midnight. Mostly cloudy, with a low around 24. Blustery.

Saturday

A slight chance of snow showers. Mostly sunny, with a high near 44.

Saturday Night

Partly cloudy, with a low around 31.

Sunday

Sunny, with a high near 60.