Heavy Rain in the Appalachians and Central Gulf Coast; Heat Continues in the West; Monitoring the Tropics

Heavy to excessive rainfall over the southern Appalachians and portions of the central Gulf Coast may bring areas of flooding today. Hot temperatures are in place through today across much of the western U.S. and New England. Tropical Storm Erin is forecast to become a Major Hurricane this weekend as it moves across the central Atlantic Ocean. Monitor future forecasts for any East Coast impacts. Read More >

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

79°F

26°C

Humidity 73%
Wind Speed Calm
Barometer 29.95 in
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 12 Aug 6:15 pm CDT
Extended Forecast for

Lynnville IA

  • Tonight

    Tonight: Isolated showers between 7pm and 10pm.  Patchy fog after 10pm.  Otherwise, mostly clear, with a low around 60. West northwest wind around 5 mph becoming calm  after midnight.  Chance of precipitation is 20%.

    Low: 60 °F

    Isolated
    Showers and
    Patchy Fog
    then Patchy
    Fog

  • Wednesday

    Wednesday: Sunny, with a high near 80. Light north wind.

    High: 80 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60. Calm wind.

    Low: 60 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 81. Calm wind becoming south southeast 5 to 7 mph in the morning.

    High: 81 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 64. Southeast wind around 6 mph.

    Low: 64 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

Detailed Forecast

Tonight
Isolated showers between 7pm and 10pm. Patchy fog after 10pm. Otherwise, mostly clear, with a low around 60. West northwest wind around 5 mph becoming calm after midnight. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 80. Light north wind.
Wednesday Night
Mostly clear, with a low around 60. Calm wind.
Thursday
Sunny, with a high near 81. Calm wind becoming south southeast 5 to 7 mph in the morning.
Thursday Night
Mostly clear, with a low around 64. Southeast wind around 6 mph.
Friday
Mostly sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 70.
Saturday
Mostly sunny, with a high near 92.
Saturday Night
Mostly clear, with a low around 72.
Sunday
Mostly sunny, with a high near 91.
Sunday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Monday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Monday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
Lynnville IA
 41.58°N 92.78°W
6:24 pm CDT Aug 12, 2025
6pm CDT Aug 12, 2025-6pm CDT Aug 19, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database