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

Widespread Rain from Texas to the Central Appalachians; Heavy to Excessive Rainfall in Southern California and the Southwest

Scattered thunderstorms and widespread showers are expected from the Texas coast to the central Appalachians today. Heavy to excessive rainfall will continue in southern California into the Desert Southwest through Saturday. Heavy rain will pose a risk of flash flooding, especially across burn scar and urbanized regions. Read More >

Current conditions at

Port Lavaca - Calhoun County Airport (KPKV)

Lat: 28.65°NLon: 96.68°WElev: 27ft.

Partly Cloudy

89°F

32°C

Humidity 63%
Wind Speed S 14 G 22 mph
Barometer 29.94 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 21 Nov 12:55 pm CST
Extended Forecast for

Port Lavaca TX

  • This Afternoon

    This Afternoon: A 30 percent chance of showers, mainly before 3pm. Mostly sunny, with a high near 85. South wind 9 to 11 mph.

    High: 85 °F

    Chance
    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 68. South southeast wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 68 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Showers and thunderstorms likely before 3pm, then a slight chance of showers between 3pm and 4pm. Partly sunny, with a high near 81. North northeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Showers
    Likely then
    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 64. Northeast wind 6 to 8 mph.

    Low: 64 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers. Mostly cloudy, with a high near 79. Northeast wind 9 to 14 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.

    High: 79 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 70. South southeast wind around 11 mph, with gusts as high as 20 mph.

    Low: 70 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 9am. Partly sunny, with a high near 82. South wind 11 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

    High: 82 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66. South wind 5 to 13 mph becoming west southwest after midnight. Winds could gust as high as 18 mph.

    Low: 66 °F

    Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81. West wind 5 to 7 mph becoming east northeast in the afternoon.

    High: 81 °F

    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
A 30 percent chance of showers, mainly before 3pm. Mostly sunny, with a high near 85. South wind 9 to 11 mph.
Tonight
A chance of showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 68. South southeast wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Showers and thunderstorms likely before 3pm, then a slight chance of showers between 3pm and 4pm. Partly sunny, with a high near 81. North northeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Mostly cloudy, with a low around 64. Northeast wind 6 to 8 mph.
Sunday
A 20 percent chance of showers. Mostly cloudy, with a high near 79. Northeast wind 9 to 14 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 70. South southeast wind around 11 mph, with gusts as high as 20 mph.
Monday
A chance of showers, with thunderstorms also possible after 9am. Partly sunny, with a high near 82. South wind 11 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Monday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66. South wind 5 to 13 mph becoming west southwest after midnight. Winds could gust as high as 18 mph.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81. West wind 5 to 7 mph becoming east northeast in the afternoon.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly after midnight. Partly cloudy, with a low around 59.
Wednesday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 73.
Wednesday Night
Mostly cloudy, with a low around 52.
Thanksgiving Day
Mostly sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Port Lavaca TX
 28.62°N 96.64°W
Last Update:
11:26 am CST Nov 21, 2025
Forecast Valid:
1pm CST Nov 21, 2025-6pm CST Nov 27, 2025
 
Forecast Discussion
 
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Additional Resources

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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