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

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

Current conditions at

Buffalo (K2WX)

Lat: 45.6°NLon: 103.55°WElev: 3002ft.

83°F

28°C

Humidity 53%
Wind Speed E 15 mph
Barometer 29.89 in (1009.9 mb)
Dewpoint 64°F (18°C)
Visibility NA
Heat Index84°F (29°C)
Last update 17 Aug 5:56 pm MDT
Extended Forecast for

4 Miles S Ralph SD

  • Tonight

    Tonight: Partly cloudy, with a low around 62. East wind 5 to 10 mph becoming northwest after midnight.

    Low: 62 °F

    Partly Cloudy

  • Monday

    Monday: Mostly cloudy through mid morning, then gradual clearing, with a high near 88. Northwest wind 5 to 10 mph becoming southeast in the morning. Winds could gust as high as 15 mph.

    High: 88 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 61. East wind 5 to 10 mph becoming south after midnight. Winds could gust as high as 15 mph.

    Low: 61 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66. Southeast wind around 15 mph, with gusts as high as 20 mph.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 96. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 96 °F

    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 67. Breezy, with a southeast wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 67 °F

    Mostly Clear
    and Breezy

  • Thursday

    Thursday: Sunny, with a high near 88. South wind 10 to 15 mph becoming north in the morning. Winds could gust as high as 30 mph.

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers after midnight. Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear
    then Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 62. East wind 5 to 10 mph becoming northwest after midnight.
Monday
Mostly cloudy through mid morning, then gradual clearing, with a high near 88. Northwest wind 5 to 10 mph becoming southeast in the morning. Winds could gust as high as 15 mph.
Monday Night
Mostly clear, with a low around 61. East wind 5 to 10 mph becoming south after midnight. Winds could gust as high as 15 mph.
Tuesday
Sunny, with a high near 92. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 66. Southeast wind around 15 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 96. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
Mostly clear, with a low around 67. Breezy, with a southeast wind 10 to 20 mph, with gusts as high as 30 mph.
Thursday
Sunny, with a high near 88. South wind 10 to 15 mph becoming north in the morning. Winds could gust as high as 30 mph.
Thursday Night
A chance of showers after midnight. Mostly clear, with a low around 56.
Friday
A slight chance of showers before noon. Sunny, with a high near 77.
Friday Night
A chance of showers. Mostly clear, with a low around 51.
Saturday
Sunny, with a high near 74.
Saturday Night
Mostly clear, with a low around 50.
Sunday
Sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Ralph SD
 45.71°N 103.08°W (Elev. 2897 ft)
Last Update:
6:09 pm MDT Aug 17, 2025
Forecast Valid:
6pm MDT Aug 17, 2025-6pm MDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation