National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hurricane and Storm Surge Watches Issued for the Northern Gulf Coast for Strengthening Tropical Storm Isaias

Tropical Storm Isaias is forecast to track toward the central Gulf Coast while strengthening into a hurricane on Thursday. There is an increasing risk of damaging hurricane-force winds and life-threatening storm surge impacts along portions of the northern Gulf Coast Friday into Saturday. Isaias will bring heavy rainfall to the central Gulf Coast and much of the Southeast Friday into the weekend. Read More >

Hazardous Weather Conditions

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Fair

79°F

26°C

Humidity 17%
Wind Speed N 13 mph
Barometer 30.14 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 7 Oct 1:15 pm MDT
Extended Forecast for

Nisland SD

Fire Weather Watch October 9, 11:00am until October 9, 08:00pm
Click here for hazard details and duration
Fire Weather Watch

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 78. North wind 6 to 8 mph, with gusts as high as 15 mph.

    High: 78 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 47. Northeast wind 6 to 8 mph becoming southeast in the evening.

    Low: 47 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 74. Southeast wind 6 to 8 mph becoming north in the afternoon. Winds could gust as high as 15 mph.

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 48. East wind 5 to 7 mph becoming light and variable after midnight.

    Low: 48 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 89. Light southwest wind increasing to 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 59. South wind 8 to 17 mph becoming southwest after midnight. Winds could gust as high as 29 mph.

    Low: 59 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Saturday Night

    Saturday Night: A chance of rain, mainly after midnight. Partly cloudy, with a low around 43.

    Low: 43 °F

    Chance Rain

  • Sunday

    Sunday: A chance of rain, mainly before noon. Mostly cloudy, with a high near 52.

    High: 52 °F

    Chance Rain

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 78. North wind 6 to 8 mph, with gusts as high as 15 mph.
Tonight
Partly cloudy, with a low around 47. Northeast wind 6 to 8 mph becoming southeast in the evening.
Thursday
Sunny, with a high near 74. Southeast wind 6 to 8 mph becoming north in the afternoon. Winds could gust as high as 15 mph.
Thursday Night
Partly cloudy, with a low around 48. East wind 5 to 7 mph becoming light and variable after midnight.
Friday
Sunny, with a high near 89. Light southwest wind increasing to 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.
Friday Night
Mostly clear, with a low around 59. South wind 8 to 17 mph becoming southwest after midnight. Winds could gust as high as 29 mph.
Saturday
Sunny, with a high near 84.
Saturday Night
A chance of rain, mainly after midnight. Partly cloudy, with a low around 43.
Sunday
A chance of rain, mainly before noon. Mostly cloudy, with a high near 52.
Sunday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 37.
Columbus Day
Rain likely. Mostly cloudy, with a high near 48.
Monday Night
A slight chance of rain. Mostly cloudy, with a low around 33.
Tuesday
A slight chance of rain. Partly sunny, with a high near 57. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Nisland SD
 44.66°N 103.56°W (Elev. 2897 ft)
Last Update:
12:31 pm MDT Oct 7, 2026
Forecast Valid:
1pm MDT Oct 7, 2026-6pm MDT Oct 13, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation