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

Excessive Rainfall in the Southern Plains, Ozarks, and Upper Midwest Thursday

Heavy thunderstorms will continue areas of excessive rainfall and locally considerable flooding over parts of the southern Plains into the mid-Mississippi River Valley through Friday. Heavy to excessive rainfall may bring flash and urban flooding, along with isolated riverine flooding to a part of the Upper Midwest Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

Port Lavaca - Calhoun County Airport (KPKV)

Lat: 28.65°NLon: 96.68°WElev: 27ft.

Rain

73°F

23°C

Humidity 95%
Wind Speed N 15 G 29 mph
Barometer 29.90 in
Dewpoint 71°F (22°C)
Visibility 5.00 mi
Last update 12 Jun 2:15 am CDT
Extended Forecast for

Port Lavaca TX

Flood Advisory until June 12, 06:45am
Click here for hazard details and duration
Flood Advisory
  •  
    Flood Advisory until June 12, 06:45am

    NOW until 6:45am Thu

    Flood Advisory

  • Overnight

    Low: 80 °F

    Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly between 9am and 11am. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 87. Heat index values as high as 98. Southeast wind 13 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts between 1 and 2 inches possible.

    High: 87 °F

    Heavy Rain

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 79. South southeast wind 10 to 14 mph, with gusts as high as 18 mph.

    Low: 79 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 90. Heat index values as high as 104. South wind 10 to 14 mph, with gusts as high as 20 mph.

    High: 90 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 80. South southeast wind 10 to 13 mph.

    Low: 80 °F

    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 90. South wind 9 to 14 mph.

    High: 90 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 79. South southeast wind 8 to 13 mph.

    Low: 79 °F

    Mostly Clear

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. South southeast wind 7 to 13 mph.

    High: 91 °F

    Chance
    T-storms

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 80. South southeast wind around 13 mph, with gusts as high as 20 mph.
Thursday
Showers and thunderstorms likely, mainly between 9am and 11am. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 87. Heat index values as high as 98. Southeast wind 13 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts between 1 and 2 inches possible.
Thursday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 79. South southeast wind 10 to 14 mph, with gusts as high as 18 mph.
Friday
A 40 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 90. Heat index values as high as 104. South wind 10 to 14 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 80. South southeast wind 10 to 13 mph.
Saturday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 90. South wind 9 to 14 mph.
Saturday Night
Mostly clear, with a low around 79. South southeast wind 8 to 13 mph.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. South southeast wind 7 to 13 mph.
Sunday Night
Mostly clear, with a low around 79. South southeast wind 7 to 11 mph.
Monday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Monday Night
Partly cloudy, with a low around 79.
Tuesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 91.
Tuesday Night
Mostly clear, with a low around 79.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Port Lavaca TX
 28.62°N 96.64°W
Last Update:
12:13 am CDT Jun 12, 2025
Forecast Valid:
3am CDT Jun 12, 2025-6pm CDT Jun 18, 2025
 
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