Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Fair

86°F

30°C

Humidity	46%
Wind Speed	NE 8 mph
Barometer	30.00 in
Dewpoint	63°F (17°C)
Visibility	10.00 mi
Heat Index	87°F (31°C)
Last update	17 Aug 3:15 pm MDT

More Information:

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

Extended Forecast for

2 Miles ENE Deadwood SD

This Afternoon
High: 86 °F
Slight Chance
T-storms
Tonight
Low: 60 °F
Partly Cloudy
Monday
High: 82 °F
Chance
T-storms
Monday Night
Low: 61 °F
Mostly Clear
Tuesday
High: 87 °F
Sunny
Tuesday Night
Low: 66 °F
Mostly Clear
Wednesday
High: 92 °F
Sunny
Wednesday Night
Low: 68 °F
Mostly Clear
Thursday
High: 85 °F
Sunny

Detailed Forecast

This Afternoon

A 20 percent chance of showers and thunderstorms before 4pm. Mostly sunny, with a high near 86. Northeast wind around 5 mph.

Tonight

Partly cloudy, with a low around 60. Southeast wind around 5 mph becoming southwest after midnight.

Monday

A slight chance of showers and thunderstorms before 9am, then a chance of showers and thunderstorms after noon. Sunny, with a high near 82. Calm wind becoming northeast around 5 mph in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 40%.

Monday Night

Mostly clear, with a low around 61. Northeast wind around 5 mph becoming southwest after midnight.

Tuesday

Sunny, with a high near 87. Light and variable wind becoming east 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

Tuesday Night

Mostly clear, with a low around 66. Southeast wind 5 to 10 mph becoming south after midnight. Winds could gust as high as 20 mph.

Wednesday

Sunny, with a high near 92. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

Wednesday Night

Mostly clear, with a low around 68. Southeast wind around 10 mph becoming southwest after midnight. Winds could gust as high as 25 mph.

Thursday

Sunny, with a high near 85.