Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

Port Lavaca - Calhoun County Airport (KPKV)

Lat: 28.65°NLon: 96.68°WElev: 27ft.

A Few Clouds

98°F

37°C

Humidity 47%
Wind Speed SE 8 mph
Barometer 29.89 in
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index110°F (43°C)
Last update 27 Aug 3:15 pm CDT
Extended Forecast for

6 Miles WSW Port O Connor TX

  • This Afternoon

    This Afternoon: Sunny, with a high near 91. Heat index values as high as 105. South wind 11 to 13 mph.

    High: 91 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 82. South wind 7 to 13 mph.

    Low: 82 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers and thunderstorms between 8am and 10am.  Sunny, with a high near 91. Heat index values as high as 105. Light and variable wind becoming south southeast 5 to 10 mph in the afternoon.  Chance of precipitation is 20%.

    High: 91 °F

    Slight Chance
    T-storms then
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 81. South wind 5 to 9 mph becoming calm  after midnight.

    Low: 81 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 91. Light and variable wind becoming southeast 5 to 10 mph in the afternoon.

    High: 91 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 81. Southeast wind 5 to 10 mph.

    Low: 81 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 90. Light south southwest wind becoming southeast 6 to 11 mph in the morning.

    High: 90 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 82. Southeast wind 7 to 10 mph.

    Low: 82 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 90. South southeast wind 5 to 11 mph.

    High: 90 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 91. Heat index values as high as 105. South wind 11 to 13 mph.
Tonight
Partly cloudy, with a low around 82. South wind 7 to 13 mph.
Friday
A slight chance of showers and thunderstorms between 8am and 10am. Sunny, with a high near 91. Heat index values as high as 105. Light and variable wind becoming south southeast 5 to 10 mph in the afternoon. Chance of precipitation is 20%.
Friday Night
Mostly clear, with a low around 81. South wind 5 to 9 mph becoming calm after midnight.
Saturday
Sunny, with a high near 91. Light and variable wind becoming southeast 5 to 10 mph in the afternoon.
Saturday Night
Clear, with a low around 81. Southeast wind 5 to 10 mph.
Sunday
Sunny, with a high near 90. Light south southwest wind becoming southeast 6 to 11 mph in the morning.
Sunday Night
Mostly clear, with a low around 82. Southeast wind 7 to 10 mph.
Monday
Sunny, with a high near 90. South southeast wind 5 to 11 mph.
Monday Night
Mostly clear, with a low around 82.
Tuesday
Sunny, with a high near 91.
Tuesday Night
Mostly clear, with a low around 82.
Wednesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 90.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles WSW Port O Connor TX
 28.42°N 96.48°W
1:46 pm CDT Aug 27, 2026
3pm CDT Aug 27, 2026-6pm CDT Sep 2, 2026
 
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