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

Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >

Current conditions at

Big Timber Airport (K6S0)

Lat: 45.80647°NLon: 109.97826°WElev: 4494.0ft.

Mostly Cloudy

59°F

15°C

Humidity 58%
Wind Speed SW 4 MPH
Barometer 30.04 in (1017.27 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 17 Aug 04:45 AM MDT
Extended Forecast for

8 Miles ESE Harlowton MT

  • Today

    Today: A 50 percent chance of showers and thunderstorms, mainly after 4pm. Increasing clouds, with a high near 86. West northwest wind 5 to 8 mph becoming light and variable.

    High: 86 °F

    Sunny then
    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 11pm. Areas of smoke after 3am. Cloudy during the early evening, then gradual clearing, with a low around 53. West northwest wind 5 to 10 mph. Chance of precipitation is 50%.

    Low: 53 °F

    Chance
    T-storms then
    Areas Smoke

  • Monday

    Monday: Sunny, with a high near 88. Light and variable wind becoming south 5 to 7 mph in the afternoon.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 56. South wind 5 to 8 mph becoming northeast after midnight.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 96. West northwest wind around 6 mph becoming light and variable.

    High: 96 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 58. East southeast wind 6 to 8 mph becoming north northwest after midnight.

    Low: 58 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 95. West wind 7 to 11 mph.

    High: 95 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 58. Northwest wind 9 to 13 mph.

    Low: 58 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 83. North wind 8 to 11 mph.

    High: 83 °F

    Sunny

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms, mainly after 4pm. Increasing clouds, with a high near 86. West northwest wind 5 to 8 mph becoming light and variable.
Tonight
A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 11pm. Areas of smoke after 3am. Cloudy during the early evening, then gradual clearing, with a low around 53. West northwest wind 5 to 10 mph. Chance of precipitation is 50%.
Monday
Sunny, with a high near 88. Light and variable wind becoming south 5 to 7 mph in the afternoon.
Monday Night
Mostly clear, with a low around 56. South wind 5 to 8 mph becoming northeast after midnight.
Tuesday
Sunny and hot, with a high near 96. West northwest wind around 6 mph becoming light and variable.
Tuesday Night
Mostly clear, with a low around 58. East southeast wind 6 to 8 mph becoming north northwest after midnight.
Wednesday
Sunny and hot, with a high near 95. West wind 7 to 11 mph.
Wednesday Night
Partly cloudy, with a low around 58. Northwest wind 9 to 13 mph.
Thursday
Sunny, with a high near 83. North wind 8 to 11 mph.
Thursday Night
Mostly clear, with a low around 52. East northeast wind 7 to 11 mph.
Friday
Sunny, with a high near 79. Northeast wind 7 to 10 mph.
Friday Night
Mostly clear, with a low around 49. East wind 6 to 13 mph.
Saturday
Sunny, with a high near 81. Northeast wind 6 to 10 mph becoming east southeast in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
8 Miles ESE Harlowton MT
 46.39°N 109.66°W (Elev. 4052 ft)
Last Update:
5:08 am MDT Aug 17, 2025
Forecast Valid:
5am MDT Aug 17, 2025-6pm MDT Aug 23, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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