National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Fort Payne, Isbell Field Airport (K4A9)

Lat: 34.47°NLon: 85.72°WElev: 876ft.

Fair with Haze

N/A

Humidity NA
Wind Speed N 3 mph
Barometer 30.22 in
Dewpoint N/A
Visibility 7.00 mi
Last update 18 Sep 6:55 am CDT
Extended Forecast for

Collinsville AL

Heat Advisory September 18, 07:06am until September 19, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 18, 07:06am until September 19, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Today

    High: 96 °F

    Sunny then
    Slight Chance
    T-storms

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 71. Calm wind.

    Low: 71 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 4pm. Sunny, with a high near 96. Heat index values as high as 99. Calm wind.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 69. Calm wind.

    Low: 69 °F

    Chance
    T-storms and
    Patchy Fog

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after 1pm. Patchy fog before 7am. Otherwise, sunny, with a high near 93. Southeast wind around 5 mph becoming calm.

    High: 93 °F

    Patchy Fog
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of thunderstorms before 7pm. Mostly clear, with a low around 67. Chance of precipitation is 30%.

    Low: 67 °F

    Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 93.

    High: 93 °F

    Sunny then
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 68. Chance of precipitation is 40%.

    Low: 68 °F

    Chance
    T-storms

Detailed Forecast

Today
A 10 percent chance of showers and thunderstorms after 5pm. Sunny, with a high near 96. Calm wind becoming north around 5 mph.
Tonight
A 10 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 71. Calm wind.
Saturday
A 30 percent chance of showers and thunderstorms after 4pm. Sunny, with a high near 96. Heat index values as high as 99. Calm wind.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 69. Calm wind.
Sunday
A 30 percent chance of showers and thunderstorms after 1pm. Patchy fog before 7am. Otherwise, sunny, with a high near 93. Southeast wind around 5 mph becoming calm.
Sunday Night
A chance of thunderstorms before 7pm. Mostly clear, with a low around 67. Chance of precipitation is 30%.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 93.
Monday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 68. Chance of precipitation is 40%.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91.
Tuesday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 66.
Wednesday
Mostly sunny, with a high near 87.
Wednesday Night
Mostly clear, with a low around 62.
Thursday
Mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Collinsville AL
 34.27°N 85.86°W (Elev. 804 ft)
Last Update:
6:50 am CDT Sep 18, 2026
Forecast Valid:
7am CDT Sep 18, 2026-6pm CDT Sep 24, 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