Heat Wave Persists Over the Central U.S.; Significant Flooding Expected in the Northern Mid-Atlantic Tuesday

Dangerous and extreme heat will remain across portions of the Central U.S. this week, persisting across the Mid to Lower Mississippi Valleys, Gulf Coast, Southern Plains and portions of Texas. A heat wave over the Southwest will intensify late this week. Severe thunderstorms and flash flooding will spread from the Great Lakes/Ohio Valley to the Mid-Atlantic and Northeast the next few days. Read More >

Hazardous Weather Conditions

Current conditions at

HELENA (HRWM8)

Lat: 46.73167°NLon: 112.01917°WElev: 3800.0ft.

NA

74°F

23°C

Humidity 26%
Wind Speed W 5 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 27 Jul 10:53 PM MDT
Extended Forecast for

4 Miles WSW Marysville MT

  • Tonight

    Tonight: Widespread smoke, mainly after 3am. Mostly clear, with a low around 56. North northeast wind around 6 mph.

    Low: 56 °F

    Smoke

  • Tuesday

    Tuesday: Widespread smoke, mainly before 9am. Sunny, with a high near 79. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 79 °F

    Smoke

  • Tuesday Night

    Tuesday Night: Areas of smoke. Mostly clear, with a low around 56. Northwest wind 7 to 10 mph.

    Low: 56 °F

    Areas Smoke

  • Wednesday

    Wednesday: Patchy smoke before 7am. Sunny, with a high near 78. West wind 5 to 8 mph.

    High: 78 °F

    Patchy Smoke
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56. West wind 6 to 8 mph.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 79. West southwest wind 5 to 9 mph, with gusts as high as 18 mph.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 57. West northwest wind 7 to 9 mph.

    Low: 57 °F

    Slight Chance
    T-storms

  • Friday

    Friday: Sunny, with a high near 81. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 59.

    Low: 59 °F

    Clear

Detailed Forecast

Tonight
Widespread smoke, mainly after 3am. Mostly clear, with a low around 56. North northeast wind around 6 mph.
Tuesday
Widespread smoke, mainly before 9am. Sunny, with a high near 79. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Areas of smoke. Mostly clear, with a low around 56. Northwest wind 7 to 10 mph.
Wednesday
Patchy smoke before 7am. Sunny, with a high near 78. West wind 5 to 8 mph.
Wednesday Night
Mostly clear, with a low around 56. West wind 6 to 8 mph.
Thursday
Sunny, with a high near 79. West southwest wind 5 to 9 mph, with gusts as high as 18 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 57. West northwest wind 7 to 9 mph.
Friday
Sunny, with a high near 81. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Friday Night
Clear, with a low around 59.
Saturday
Sunny, with a high near 86.
Saturday Night
Mostly clear, with a low around 59.
Sunday
Sunny, with a high near 75.
Sunday Night
Clear, with a low around 48.
Monday
Sunny, with a high near 67.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Marysville MT
 46.72°N 112.38°W (Elev. 6493 ft)
10:21 pm MDT Jul 27, 2026
11pm MDT Jul 27, 2026-6pm MDT Aug 3, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database