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

Thunderstorms and Heavy Rainfall in the Southeast, Montana, and Iowa; Lowell Begins to Impact Hawaii

Strong thunderstorms with damaging winds and heavy rain are expected across portions of the Southeast. Thunderstorms may produce large hail across portions of Montana. Heavy rainfall could produce flash flooding across Iowa and vulnerable areas in Utah. Lowell will bring heavy rain, dangerous swells and rip currents to portions of Hawaii. Sweltering heat persists across the South-Central US. Read More >

Hazardous Weather Conditions

Current conditions at

Waterloo, Waterloo Municipal Airport (KALO)

Lat: 42.55°NLon: 92.4°WElev: 873ft.

Fair

72°F

22°C

Humidity 91%
Wind Speed E 3 mph
Barometer 30.06 in (1017.4 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 6 Sep 6:54 pm CDT
Extended Forecast for

Elk Run Heights IA

  • Tonight

    Tonight: Mostly cloudy, with a low around 62. East southeast wind 6 to 9 mph.

    Low: 62 °F

    Mostly Cloudy

  • Labor Day

    Labor Day: Partly sunny, with a high near 80. South southeast wind 9 to 14 mph, with gusts as high as 20 mph.

    High: 80 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63. South southeast wind 13 to 15 mph, with gusts as high as 21 mph.

    Low: 63 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 1pm, then a chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 87. South southeast wind around 11 mph, with gusts as high as 18 mph. Chance of precipitation is 40%.

    High: 87 °F

    Chance
    T-storms then
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 68. South southeast wind 7 to 9 mph becoming southwest after midnight. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 68 °F

    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 57.

    Low: 57 °F

    Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 62. East southeast wind 6 to 9 mph.
Labor Day
Partly sunny, with a high near 80. South southeast wind 9 to 14 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 63. South southeast wind 13 to 15 mph, with gusts as high as 21 mph.
Tuesday
A chance of showers and thunderstorms before 1pm, then a chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 87. South southeast wind around 11 mph, with gusts as high as 18 mph. Chance of precipitation is 40%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 68. South southeast wind 7 to 9 mph becoming southwest after midnight. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
Mostly sunny, with a high near 82.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Sunny, with a high near 78.
Thursday Night
Clear, with a low around 57.
Friday
Sunny, with a high near 82.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly clear, with a low around 61.
Saturday
A 30 percent chance of showers. Mostly sunny, with a high near 81.
Saturday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 60.
Sunday
A 40 percent chance of showers. Mostly sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Elk Run Heights IA
 42.46°N 92.23°W
Last Update:
5:51 pm CDT Sep 6, 2026
Forecast Valid:
7pm CDT Sep 6, 2026-6pm CDT Sep 13, 2026
 
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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