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Heat in the Central U.S.; Heavy Rain Possible for South Texas; Monitoring Erin Tropical Impacts

Hot temperatures are forecast over the Plains and into the lower Mississippi River Valley Friday where Heat Advisories have been issued. Heavy rain from a disturbance in the western Gulf could bring flooding to south Texas. Erin could bring tropical storm conditions and heavy rain to Puerto Rico and the USVI this weekend with dangerous surf and rip currents impacting the western Atlantic Basin. Read More >

Hazardous Weather Conditions

Current conditions at

Atlantic (KAIO)

Lat: 41.4°NLon: 95.05°WElev: 1181ft.

Partly Cloudy

75°F

24°C

Humidity 89%
Wind Speed S 8 mph
Barometer 29.95 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 14 Aug 11:35 pm CDT
Extended Forecast for

Griswold IA

Heat Advisory August 15, 01:00pm until August 15, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Mostly clear, with a steady temperature around 73. South wind around 9 mph.

    Low: 73 °F

    Mostly Clear

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms, mainly before 2pm. Partly sunny, with a high near 92. Heat index values as high as 105. South wind 9 to 14 mph, with gusts as high as 22 mph.

    High: 92 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: Mostly clear, with a low around 73. South wind around 10 mph.

    Low: 73 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 95. Heat index values as high as 105. South wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 95 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 73. South wind 7 to 10 mph.

    Low: 73 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 91.

    High: 91 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a steady temperature around 73. South wind around 9 mph.
Friday
A 40 percent chance of showers and thunderstorms, mainly before 2pm. Partly sunny, with a high near 92. Heat index values as high as 105. South wind 9 to 14 mph, with gusts as high as 22 mph.
Friday Night
Mostly clear, with a low around 73. South wind around 10 mph.
Saturday
Sunny, with a high near 95. Heat index values as high as 105. South wind 9 to 14 mph, with gusts as high as 21 mph.
Saturday Night
Mostly clear, with a low around 73. South wind 7 to 10 mph.
Sunday
Mostly sunny, with a high near 93.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72.
Monday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 91.
Monday Night
Partly cloudy, with a low around 70.
Tuesday
Mostly sunny, with a high near 90.
Tuesday Night
Mostly clear, with a low around 67.
Wednesday
Mostly sunny, with a high near 86.
Wednesday Night
Mostly clear, with a low around 63.
Thursday
Sunny, with a high near 85.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Griswold IA
 41.24°N 95.15°W
Last Update:
10:34 pm CDT Aug 14, 2025
Forecast Valid:
11pm CDT Aug 14, 2025-6pm CDT Aug 21, 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