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

Ottumwa Regional Airport (KOTM)

Lat: 41.1°NLon: 92.44°WElev: 830ft.

Fair

75°F

24°C

Humidity 88%
Wind Speed W 3 mph
Barometer 29.78 in (1007.5 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 28 Jul 2:53 am CDT
Extended Forecast for

Ollie IA

  • Overnight

    Overnight: Patchy smoke. Mostly cloudy, with a low around 71. North wind around 5 mph.

    Low: 71 °F

    Patchy Smoke

  • Tuesday

    Tuesday: Partly sunny, with a high near 87. Northeast wind 5 to 10 mph.

    High: 87 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67. Northeast wind around 5 mph becoming southeast after midnight.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. Southeast wind around 5 mph.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 68.

    Low: 68 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Friday

    Friday: Showers likely and possibly a thunderstorm.  Mostly cloudy, with a high near 81. Chance of precipitation is 70%.

    High: 81 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 64.

    Low: 64 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Patchy smoke. Mostly cloudy, with a low around 71. North wind around 5 mph.
Tuesday
Partly sunny, with a high near 87. Northeast wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 67. Northeast wind around 5 mph becoming southeast after midnight.
Wednesday
Sunny, with a high near 88. Southeast wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 66.
Thursday
Mostly sunny, with a high near 88.
Thursday Night
A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 81. Chance of precipitation is 70%.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Saturday
Partly sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 63.
Sunday
Sunny, with a high near 82.
Sunday Night
Clear, with a low around 63.
Monday
Sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
Ollie IA
 41.19°N 92.09°W (Elev. 801 ft)
1:26 am CDT Jul 28, 2026
2am CDT Jul 28, 2026-6pm CDT Aug 3, 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