Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Hazardous Weather Conditions

Current conditions at

Cedar Rapids Airport (KCID)

Lat: 41.88°NLon: 91.72°WElev: 840ft.

Fair

65°F

18°C

Humidity 90%
Wind Speed SW 6 mph
Barometer 30.02 in (1016.1 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 18 Aug 3:52 am CDT
Extended Forecast for

Mount Vernon IA

  • Today

    Today: A 50 percent chance of showers and thunderstorms after 7am.  Partly sunny, with a high near 80. West wind 5 to 10 mph.

    High: 80 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly before 11pm.  Partly cloudy, with a low around 64. West wind around 5 mph becoming calm  in the evening.

    Low: 64 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 79. Calm wind becoming north around 5 mph in the afternoon.

    High: 79 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 60. Northeast wind around 5 mph becoming calm.

    Low: 60 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: A 30 percent chance of showers after 1pm.  Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 64.

    Low: 64 °F

    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms after 7am. Partly sunny, with a high near 80. West wind 5 to 10 mph.
Tonight
A 40 percent chance of showers and thunderstorms, mainly before 11pm. Partly cloudy, with a low around 64. West wind around 5 mph becoming calm in the evening.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 79. Calm wind becoming north around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 60. Northeast wind around 5 mph becoming calm.
Thursday
Sunny, with a high near 80.
Thursday Night
Mostly clear, with a low around 62.
Friday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 82.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Saturday
Sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Mostly sunny, with a high near 78.
Sunday Night
Partly cloudy, with a low around 61.
Monday
Partly sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IA
 41.93°N 91.43°W (Elev. 896 ft)
3:06 am CDT Aug 18, 2026
4am CDT Aug 18, 2026-6pm CDT Aug 24, 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