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

Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Great Lakes

Thunderstorms with strong wind gusts and hail will be possible today from Michigan into the Lower Great Lakes region. A significant and dangerous heat wave will expand from the Central U.S. into the Eastern U.S this weekend through much of next week. Numerous daily record highs and warm lows are likely. Read More >

Hazardous Weather Conditions

Current conditions at

Ottumwa Regional Airport (KOTM)

Lat: 41.1°NLon: 92.44°WElev: 830ft.

Fair and Breezy

81°F

27°C

Humidity 74%
Wind Speed SW 21 G 38 mph
Barometer 29.75 in (1006.4 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 21 Jun 7:53 am CDT
Extended Forecast for

2 Miles ENE Sigourney IA

Heat Advisory June 21, 12:00pm until June 23, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Sunny and hot, with a high near 96. Heat index values as high as 106. Breezy, with a south wind 20 to 25 mph, with gusts as high as 45 mph.

    High: 96 °F

    Hot and
    Breezy

  • Tonight

    Tonight: Clear, with a low around 76. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph.

    Low: 76 °F

    Clear and
    Breezy then
    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 96. Heat index values as high as 105. Breezy, with a south wind 15 to 25 mph, with gusts as high as 35 mph.

    High: 96 °F

    Hot and
    Breezy

  • Sunday Night

    Sunday Night: Clear, with a low around 75. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 75 °F

    Clear and
    Breezy then
    Clear

  • Monday

    Monday: A 30 percent chance of showers after 1pm. Sunny and hot, with a high near 95.

    High: 95 °F

    Sunny then
    Chance
    Showers

  • Monday Night

    Monday Night: Showers likely, with thunderstorms also possible after 7pm. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.

    Low: 70 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 90. Chance of precipitation is 40%.

    High: 90 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 40%.

    Low: 71 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 92. Chance of precipitation is 50%.

    High: 92 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Sunny and hot, with a high near 96. Heat index values as high as 106. Breezy, with a south wind 20 to 25 mph, with gusts as high as 45 mph.
Tonight
Clear, with a low around 76. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph.
Sunday
Sunny and hot, with a high near 96. Heat index values as high as 105. Breezy, with a south wind 15 to 25 mph, with gusts as high as 35 mph.
Sunday Night
Clear, with a low around 75. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.
Monday
A 30 percent chance of showers after 1pm. Sunny and hot, with a high near 95.
Monday Night
Showers likely, with thunderstorms also possible after 7pm. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Tuesday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 90. Chance of precipitation is 40%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 40%.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 92. Chance of precipitation is 50%.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Thursday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Sigourney IA
 41.35°N 92.17°W (Elev. 817 ft)
Last Update:
5:47 am CDT Jun 21, 2025
Forecast Valid:
8am CDT Jun 21, 2025-6pm CDT Jun 27, 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