textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 617 PM CDT Wed Sep 2 2026

- A Heat Advisory is in effect this afternoon and will continue until 6 pm for inland Cameron, Willacy, and Kenedy Counties.

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

- A combination of dry fuels, low relative humidity, and hot temperatures will continue contributing to elevated wildfire risks.

- Sea breeze showers and thunderstorms east of I-69C are possible each afternoon starting Labor Day Weekend and continuing into early next week.

DISCUSSION

Issued at 1217 PM CDT Wed Sep 2 2026

Strong upper level ridging will continue throughout the South- Southeast CONUS through early next week, which will keep conditions unseasonably hot and mostly rain-free throughout Deep South Texas. Potential record high temperatures are possible today through the weekend as high temperatures reach the triple digits each afternoon, with Major (level 3 of 4) to Extreme (level 4 of 4) Heat Risk expected to persist. The hottest temperatures are expected to occur this afternoon, and a Heat Advisory has been issued for inland Cameron, Willacy, and Kenedy Counties until 6 pm. Heat Advisories and/or Special Weather Statements are also possible tomorrow and Friday as well.

A slight increase in Gulf moisture this weekend will create a low (10 to 20%) chance of sea breeze convection starting Saturday and continuing through the middle of next week. Showers and thunderstorms, mainly east of I-69C, will be possible.

The hot weather, combined with dry fuels and lower relative humidities (particularly in the Western counties) will support enhanced wildfire danger through the weekend. While Fire Danger Statements are not anticipated due to lower wind speeds, fires could catch very easily due to hot and dry conditions. Outdoor burning is highly discouraged.

AVIATION

(00Z TAFS) Issued at 617 PM CDT Wed Sep 2 2026

VFR conditions prevail. Breezy southeasterly winds begin to diminish to 7-12 kts this evening. Mid to late Thursday morning, gusts to 20-25 kts return.

MARINE

Issued at 1217 PM CDT Wed Sep 2 2026

Intermittent SCEC conditions could occur each afternoon on the Bay as winds get breezy through the diurnal cycle. Otherwise, conditions should be favorable with light to moderate south- southeasterly winds and low (1 to 3 feet) wave heights.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 82 99 81 99 / 10 0 0 0 HARLINGEN 78 103 78 102 / 0 0 0 0 MCALLEN 82 105 82 104 / 0 0 0 0 RIO GRANDE CITY 79 106 79 105 / 0 0 0 0 SOUTH PADRE ISLAND 82 90 82 90 / 0 0 0 0 BAYVIEW/PORT ISABEL 80 97 79 96 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

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