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Heavy Rain in the Southern Appalachians; Heat Continues in the West; Monitoring Tropical Storm Erin

Heavy to excessive rain falling over the southern Appalachians may bring areas of flooding into Wednesday. Hot temperatures are in place through Wednesday across parts of the western U.S. and New England. Tropical Storm Erin is forecast to become a Hurricane by late this week as it moves westward across the central Atlantic Ocean. Monitor forecasts for any Puerto Rico or U.S. East Coast impacts. Read More >

Hazardous Weather Conditions

Current conditions at

Grissom Air Force Base / Peru (KGUS)

Lat: 40.65°NLon: 86.15°WElev: 810ft.

Fair

70°F

21°C

Humidity 95%
Wind Speed SW 3 mph
Barometer 29.90 in (1012.0 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 13 Aug 2:55 am EDT
Extended Forecast for

Walton IN

  • Overnight

    Overnight: A 20 percent chance of showers. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 69. Southwest wind around 5 mph.

    Low: 69 °F

    Slight Chance
    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: A slight chance of showers before 8am, then a slight chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 84. Northwest wind around 5 mph. Chance of precipitation is 20%.

    High: 84 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59. North wind around 5 mph becoming calm after midnight.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 65.

    Low: 65 °F

    Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 91.

    High: 91 °F

    Hot

  • Saturday Night

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

    Low: 70 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of showers. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 69. Southwest wind around 5 mph.
Wednesday
A slight chance of showers before 8am, then a slight chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 84. Northwest wind around 5 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around 59. North wind around 5 mph becoming calm after midnight.
Thursday
Sunny, with a high near 85. Calm wind becoming northeast around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 63. Calm wind.
Friday
Sunny, with a high near 87.
Friday Night
Clear, with a low around 65.
Saturday
Sunny and hot, with a high near 91.
Saturday Night
Mostly clear, with a low around 70.
Sunday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 92.
Sunday Night
A 10 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Walton IN
 40.68°N 86.25°W (Elev. 748 ft)
Last Update:
2:59 am EDT Aug 13, 2025
Forecast Valid:
3am EDT Aug 13, 2025-6pm EDT Aug 19, 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