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

Areas of Heavy to Excessive Rainfall and Hot Temperatures This Week

Heavy to excessive rainfall could bring areas of flooding at times Monday through Thursday across parts of the central Plains into the Midwest as well as southern Arizona and New Mexico. Hot temperatures and high humidity will continue across much of east Texas into the lower and mid-Mississippi Valley through at least midweek. Read More >

Hazardous Weather Conditions

Current conditions at

Marshall (KASL)

Lat: 32.52°NLon: 94.31°WElev: 357ft.

Fair

78°F

26°C

Humidity 87%
Wind Speed Calm
Barometer 30.02 in
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 14 Sep 12:35 am CDT
Extended Forecast for

Karnack TX

Heat Advisory September 14, 12:40am until September 15, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 14, 12:40am until September 15, 07:00pm

    NOW until 7:00pm Tue

    Heat Advisory

  • Overnight

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 100. Heat index values as high as 107. Calm wind becoming south around 5 mph in the afternoon.

    High: 100 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. Southeast wind around 5 mph becoming calm.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. Heat index values as high as 106. Calm wind becoming south around 5 mph.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 75. Calm wind.

    Low: 75 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 99.

    High: 99 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 75.

    Low: 75 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

Detailed Forecast

Overnight
Mostly clear, with a low around 76. Calm wind.
Monday
Sunny and hot, with a high near 100. Heat index values as high as 107. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 75. Southeast wind around 5 mph becoming calm.
Tuesday
Sunny and hot, with a high near 99. Heat index values as high as 106. Calm wind becoming south around 5 mph.
Tuesday Night
Mostly clear, with a low around 75. Calm wind.
Wednesday
Mostly sunny and hot, with a high near 99.
Wednesday Night
Partly cloudy, with a low around 75.
Thursday
Sunny and hot, with a high near 98.
Thursday Night
Mostly clear, with a low around 71.
Friday
Sunny and hot, with a high near 98.
Friday Night
Mostly clear, with a low around 71.
Saturday
Sunny and hot, with a high near 98.
Saturday Night
Mostly clear, with a low around 72.
Sunday
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 96.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Karnack TX
 32.63°N 94.14°W (Elev. 223 ft)
Last Update:
12:20 am CDT Sep 14, 2026
Forecast Valid:
12am CDT Sep 14, 2026-6pm CDT Sep 20, 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