Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Current conditions at

Port Lavaca - Calhoun County Airport (KPKV)

Lat: 28.65°NLon: 96.68°WElev: 27ft.

Partly Cloudy

79°F

26°C

Humidity 100%
Wind Speed E 7 mph
Barometer 29.69 in
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 17 Jun 1:55 am CDT
Extended Forecast for

2 Miles N Port Lavaca TX

Flood Watch June 17, 02:14am until June 17, 07:00am
Heat Advisory June 17, 01:00pm until June 17, 07:00pm
Click here for hazard details and duration
Flood Watch
Heat Advisory
  •  
    Flood Watch June 17, 02:14am until June 17, 07:00am

    NOW until 7:00am Wed

    Flood Watch

  • Overnight

    Low: 77 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly before 2pm.  Patchy fog between 8am and 10am.  Otherwise, mostly sunny, with a high near 85. Heat index values as high as 101. Windy, with a north northwest wind 21 to 31 mph becoming north northwest 7 to 12 mph. Winds could gust as high as 41 mph.

    High: 85 °F

    Chance
    T-storms and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 81. South wind 11 to 16 mph, with gusts as high as 21 mph.

    Low: 81 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 86. Heat index values as high as 104. South wind 11 to 17 mph, with gusts as high as 22 mph.

    High: 86 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 82. South southeast wind 14 to 16 mph, with gusts as high as 21 mph.

    Low: 82 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Partly sunny, with a high near 86. South southeast wind 14 to 16 mph, with gusts as high as 21 mph.

    High: 86 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 81. Southeast wind 11 to 15 mph, with gusts as high as 20 mph.

    Low: 81 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 1pm.  Partly sunny, with a high near 85. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 85 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 77. North northeast wind around 9 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly before 2pm. Patchy fog between 8am and 10am. Otherwise, mostly sunny, with a high near 85. Heat index values as high as 101. Windy, with a north northwest wind 21 to 31 mph becoming north northwest 7 to 12 mph. Winds could gust as high as 41 mph.
Wednesday Night
Mostly clear, with a low around 81. South wind 11 to 16 mph, with gusts as high as 21 mph.
Thursday
Mostly sunny, with a high near 86. Heat index values as high as 104. South wind 11 to 17 mph, with gusts as high as 22 mph.
Thursday Night
Partly cloudy, with a low around 82. South southeast wind 14 to 16 mph, with gusts as high as 21 mph.
Juneteenth
Partly sunny, with a high near 86. South southeast wind 14 to 16 mph, with gusts as high as 21 mph.
Friday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 81. Southeast wind 11 to 15 mph, with gusts as high as 20 mph.
Saturday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around 81. Southeast wind around 15 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 85.
Sunday Night
Partly cloudy, with a low around 82.
Monday
Sunny, with a high near 86.
Monday Night
Mostly clear, with a low around 81.
Tuesday
Mostly sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Port Lavaca TX
 28.65°N 96.61°W
1:21 am CDT Jun 17, 2026
2am CDT Jun 17, 2026-6pm CDT Jun 23, 2026
 
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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