textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1249 AM CDT Sun Sep 6 2026

- Major (level 3 of 4) to Extreme (level 4 of 4) Heat Risk is expected throughout much of Deep South Texas into next week.

- Showers and thunderstorms, especially along the seabreeze, are possible each afternoon into next week.

- Low risk of rip currents are area beaches.

DISCUSSION

Issued at 1017 PM CDT Sat Sep 5 2026

Heat continues to be the main weather hazard through the forecast period. For the remainder of the Labor Day weekend and into next week, most inland locations will continue to see afternoon highs in triple digits with locations right along the coast remaining in the 90s. Heat indices of 105-110 degrees is expected across the region each afternoon. While some locations may see indices rise above 111 degrees, it should be brief and thus Special Weather Statements should suffice, but will continue to monitor. A major (level 3 of 4) to Extreme (level 4 of 4) Heat Risk will continue in next week.

While rain chances will continue into next week, chances have trended downward slightly with a 10-25% chance most days, especially along the sea breeze. Best chance of rain will be on Wednesday with chances up to around 30%. Any convection that does develop could produce locally heavy rain, gusty winds, and cloud to ground lighting.

While there is a low risk of rip currents at area beaches this weekend, life threatening rips currents often occur near jetties and piers. Use caution if entering the water.

AVIATION

(06Z TAFS) Issued at 1249 AM CDT Sun Sep 6 2026

Mostly clear skies and light winds prevail across Deep South Texas early this morning. Isolated convection will be possible today, but confidence remains low at the terminals at this time. VFR conditions are expected for the next 24 hours.

MARINE

Issued at 1017 PM CDT Sat Sep 5 2026

Generally favorable conditions will prevail. Expect light to moderate southeasterly winds with seas around 2 ft and 5 second periods. Daily chances of showers and thunderstorms could lead to locally enhanced winds and seas.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 98 80 98 80 / 20 0 20 10 HARLINGEN 101 76 101 76 / 20 0 20 0 MCALLEN 103 81 103 80 / 20 0 20 0 RIO GRANDE CITY 103 79 103 79 / 20 10 10 0 SOUTH PADRE ISLAND 90 82 90 82 / 10 0 10 0 BAYVIEW/PORT ISABEL 96 78 96 78 / 10 0 20 0

BRO WATCHES/WARNINGS/ADVISORIES

TX...None. GM...None.