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

Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Hazardous Weather Conditions

Current conditions at

Longview - East Texas Regional Airport (KGGG)

Lat: 32.39°NLon: 94.71°WElev: 364ft.

Fair

78°F

26°C

Humidity 82%
Wind Speed E 6 mph
Barometer 29.66 in (1003.5 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 17 Jun 11:53 pm CDT
Extended Forecast for

Tatum TX

Heat Advisory June 18, 12:00pm until June 18, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Increasing clouds, with a low around 75. Southeast wind around 5 mph becoming calm.

    Low: 75 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Partly sunny, with a high near 93. Heat index values as high as 106. Calm wind becoming south around 5 mph.

    High: 93 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 78. Southeast wind around 5 mph.

    Low: 78 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Juneteenth

    Juneteenth: A 50 percent chance of showers and thunderstorms, mainly after 10am. Mostly cloudy, with a high near 91. Heat index values as high as 106. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 91 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 75. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.

    Low: 75 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 89. Chance of precipitation is 60%.

    High: 89 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76.

    Low: 76 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92.

    High: 92 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 78.

    Low: 78 °F

    Mostly Clear

Detailed Forecast

Overnight
Increasing clouds, with a low around 75. Southeast wind around 5 mph becoming calm.
Thursday
Partly sunny, with a high near 93. Heat index values as high as 106. Calm wind becoming south around 5 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 78. Southeast wind around 5 mph.
Juneteenth
A 50 percent chance of showers and thunderstorms, mainly after 10am. Mostly cloudy, with a high near 91. Heat index values as high as 106. Calm wind becoming southeast around 5 mph in the afternoon.
Friday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 75. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 89. Chance of precipitation is 60%.
Saturday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92.
Sunday Night
Mostly clear, with a low around 78.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77.
Tuesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 93.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 91.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tatum TX
 32.31°N 94.52°W (Elev. 318 ft)
Last Update:
12:30 am CDT Jun 18, 2026
Forecast Valid:
12am CDT Jun 18, 2026-6pm CDT Jun 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