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

Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Great Lakes

Thunderstorms with strong wind gusts and hail will be possible today from Michigan into the Lower Great Lakes region. A significant and dangerous heat wave will expand from the Central U.S. into the Eastern U.S this weekend through much of next week. Numerous daily record highs and warm lows are likely. Read More >

Current conditions at

Port Lavaca - Calhoun County Airport (KPKV)

Lat: 28.65°NLon: 96.68°WElev: 27ft.

Fair

83°F

28°C

Humidity 87%
Wind Speed SE 10 mph
Barometer 30.01 in
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 21 Jun 9:35 pm CDT
Extended Forecast for

3 Miles SSW Port Lavaca TX

  • Tonight

    Tonight: Mostly clear, with a low around 79. Southeast wind 9 to 13 mph, with gusts as high as 20 mph.

    Low: 79 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 89. Heat index values as high as 102. Southeast wind 8 to 15 mph, with gusts as high as 21 mph.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 78. South southeast wind 7 to 14 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers, with thunderstorms also possible after 10am. Sunny, with a high near 90. Heat index values as high as 102. Southeast wind 6 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 90 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 77. Southeast wind 5 to 13 mph, with gusts as high as 18 mph.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90. East southeast wind 5 to 13 mph.

    High: 90 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of thunderstorms before 7pm, then a slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 76. Southeast wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 76 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. Southeast wind 5 to 11 mph.

    High: 89 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 77. Southeast wind 5 to 10 mph.

    Low: 77 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 79. Southeast wind 9 to 13 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 89. Heat index values as high as 102. Southeast wind 8 to 15 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 78. South southeast wind 7 to 14 mph, with gusts as high as 20 mph.
Monday
A slight chance of showers, with thunderstorms also possible after 10am. Sunny, with a high near 90. Heat index values as high as 102. Southeast wind 6 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 77. Southeast wind 5 to 13 mph, with gusts as high as 18 mph.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90. East southeast wind 5 to 13 mph.
Tuesday Night
A slight chance of thunderstorms before 7pm, then a slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 76. Southeast wind 5 to 10 mph. Chance of precipitation is 20%.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. Southeast wind 5 to 11 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 77. Southeast wind 5 to 10 mph.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77.
Friday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Port Lavaca TX
 28.58°N 96.64°W
Last Update:
6:29 pm CDT Jun 21, 2025
Forecast Valid:
9pm CDT Jun 21, 2025-6pm CDT Jun 28, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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