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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Saturday could bring areas of flooding across parts of the central Plains into the upper Midwest/Great Lakes, and Four Corners states. Read More >

Current conditions at

Port Lavaca - Calhoun County Airport (KPKV)

Lat: 28.65°NLon: 96.68°WElev: 27ft.

Fair

79°F

26°C

Humidity 100%
Wind Speed NE 7 mph
Barometer 30.08 in
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 17 Sep 6:15 am CDT
Extended Forecast for

2 Miles N Port Lavaca TX

  • Today

    Today: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. High near 86. Heat index values as high as 106. East northeast wind 9 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Chance
    T-storms then
    Showers

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 81. East wind 9 to 16 mph, with gusts as high as 21 mph.

    Low: 81 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and noon. Sunny, with a high near 88. Heat index values as high as 100. Northeast wind 10 to 16 mph becoming east southeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.

    High: 88 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 79. East southeast wind 12 to 17 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 21 mph.

    Low: 79 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 87. East northeast wind 8 to 15 mph.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 80. East southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 80 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 87. Southeast wind 5 to 13 mph.

    High: 87 °F

    Sunny then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 81. South southeast wind 6 to 14 mph.

    Low: 81 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 87. Light southeast wind becoming east southeast 6 to 11 mph in the afternoon.

    High: 87 °F

    Chance
    T-storms

Detailed Forecast

Today
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. High near 86. Heat index values as high as 106. East northeast wind 9 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 81. East wind 9 to 16 mph, with gusts as high as 21 mph.
Friday
A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and noon. Sunny, with a high near 88. Heat index values as high as 100. Northeast wind 10 to 16 mph becoming east southeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Friday Night
Mostly clear, with a low around 79. East southeast wind 12 to 17 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 21 mph.
Saturday
Sunny, with a high near 87. East northeast wind 8 to 15 mph.
Saturday Night
Mostly clear, with a low around 80. East southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 87. Southeast wind 5 to 13 mph.
Sunday Night
Mostly clear, with a low around 81. South southeast wind 6 to 14 mph.
Monday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 87. Light southeast wind becoming east southeast 6 to 11 mph in the afternoon.
Monday Night
Mostly clear, with a low around 80.
Tuesday
A 30 percent chance of showers and thunderstorms. Sunny, with a high near 88.
Tuesday Night
Mostly clear, with a low around 81.
Wednesday
A 30 percent chance of showers and thunderstorms. Sunny, with a high near 88.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Port Lavaca TX
 28.65°N 96.61°W
Last Update:
1:51 am CDT Sep 17, 2026
Forecast Valid:
6am CDT Sep 17, 2026-6pm CDT Sep 23, 2026
 
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