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Excessive Rainfall Potential for the Southeast; Heat Expands for Center of the Nation; Critical Fire Weather for Pacific Northwest

Flash flooding threatens areas from the Tennessee Valley to the Carolinas as storms repeat along a stalled front. Monsoonal storms may trigger flooding in the Southwest. Dangerous heat expands across the Desert Southwest, Plains, mid-Mississippi Valley and Southern Tier. Critical fire weather for interior Pacific Northwest. Cooler, drier air brings brief relief to the Great Lakes and Northeast. Read More >

Hazardous Weather Conditions

Current conditions at

Denison (KDNS)

Lat: 41.98°NLon: 95.38°WElev: 1273ft.

Overcast

68°F

20°C

Humidity 88%
Wind Speed SE 15 mph
Barometer 30.05 in
Dewpoint 64°F (18°C)
Visibility NA
Last update 24 Jul 12:15 pm CDT
Extended Forecast for

Mapleton IA

Heat Advisory July 25, 12:00pm until July 27, 10:00pm
Click here for hazard details and duration
Heat Advisory

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 79. South wind 7 to 9 mph, with gusts as high as 18 mph.

    High: 79 °F

    Mostly Cloudy

  • Tonight

    Tonight: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 66. South southeast wind 5 to 7 mph.

    Low: 66 °F

    Partly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 95. South southwest wind 5 to 7 mph.

    High: 95 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 73. South wind around 6 mph.

    Low: 73 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 96. South southwest wind 5 to 11 mph, with gusts as high as 21 mph.

    High: 96 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 76. South wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Monday

    Monday: Sunny and hot, with a high near 97. Light and variable wind becoming north northeast around 6 mph in the afternoon.

    High: 97 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 71. East northeast wind around 5 mph becoming calm in the evening.

    Low: 71 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 92. Calm wind becoming east around 5 mph in the afternoon.

    High: 92 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 79. South wind 7 to 9 mph, with gusts as high as 18 mph.
Tonight
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 66. South southeast wind 5 to 7 mph.
Saturday
Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 95. South southwest wind 5 to 7 mph.
Saturday Night
Partly cloudy, with a low around 73. South wind around 6 mph.
Sunday
Mostly sunny, with a high near 96. South southwest wind 5 to 11 mph, with gusts as high as 21 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 76. South wind 6 to 10 mph, with gusts as high as 20 mph.
Monday
Sunny and hot, with a high near 97. Light and variable wind becoming north northeast around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 71. East northeast wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 92. Calm wind becoming east around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 69. Southeast wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 92. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 70. Southeast wind 3 to 7 mph.
Thursday
Mostly sunny, with a high near 92. Calm wind becoming south southeast around 6 mph in the afternoon.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mapleton IA
 42.18°N 95.79°W (Elev. 1135 ft)
Last Update:
12:06 pm CDT Jul 24, 2026
Forecast Valid:
12pm CDT Jul 24, 2026-6pm CDT Jul 30, 2026
 
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