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.

Partly Cloudy

59°F

15°C

Humidity 58%
Wind Speed W 8 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 17 Aug 03:35 AM MDT
Extended Forecast for

9 Miles W Harlowton MT

  • Today

    Today: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 83. West northwest wind 5 to 9 mph becoming southeast in the morning. Chance of precipitation is 60%.

    High: 83 °F

    Mostly Sunny
    then Showers
    Likely

  • Tonight

    Tonight: A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 50. North northeast wind 7 to 10 mph becoming south southwest in the evening. Chance of precipitation is 50%.

    Low: 50 °F

    Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Areas of smoke before noon. Sunny, with a high near 86. West wind 5 to 10 mph becoming south southeast in the morning.

    High: 86 °F

    Areas Smoke
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54. West southwest wind 6 to 10 mph becoming east in the evening.

    Low: 54 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 93. South southwest wind 6 to 8 mph.

    High: 93 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56. South southeast wind 6 to 9 mph becoming northwest after midnight.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 92. West wind 9 to 14 mph.

    High: 92 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54. West northwest wind 10 to 13 mph.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 82. West northwest wind 9 to 13 mph becoming north in the afternoon.

    High: 82 °F

    Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 83. West northwest wind 5 to 9 mph becoming southeast in the morning. Chance of precipitation is 60%.
Tonight
A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 50. North northeast wind 7 to 10 mph becoming south southwest in the evening. Chance of precipitation is 50%.
Monday
Areas of smoke before noon. Sunny, with a high near 86. West wind 5 to 10 mph becoming south southeast in the morning.
Monday Night
Mostly clear, with a low around 54. West southwest wind 6 to 10 mph becoming east in the evening.
Tuesday
Sunny and hot, with a high near 93. South southwest wind 6 to 8 mph.
Tuesday Night
Mostly clear, with a low around 56. South southeast wind 6 to 9 mph becoming northwest after midnight.
Wednesday
Sunny and hot, with a high near 92. West wind 9 to 14 mph.
Wednesday Night
Partly cloudy, with a low around 54. West northwest wind 10 to 13 mph.
Thursday
Sunny, with a high near 82. West northwest wind 9 to 13 mph becoming north in the afternoon.
Thursday Night
Mostly clear, with a low around 49. Northeast wind 7 to 14 mph becoming east southeast after midnight.
Friday
Sunny, with a high near 77. East wind 7 to 13 mph.
Friday Night
Mostly clear, with a low around 47. East wind 6 to 14 mph.
Saturday
Sunny, with a high near 79. East southeast wind 6 to 11 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
9 Miles W Harlowton MT
 46.45°N 110.04°W (Elev. 4498 ft)
Last Update:
12:47 am MDT Aug 17, 2025
Forecast Valid:
4am 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