textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 616 PM CDT Mon Aug 3 2026

- Heat Indices between 105-110F are expected each day, potentially higher. Heat Advisories may be needed.

- Moderate (level 2 out of 4) to Major (level 3 out of 4) Heat risk will continue through Thursday.

- Low chance of isolated showers and thunderstorms along the sea breeze each afternoon, mainly late week through the weekend.

DISCUSSION

Issued at 1206 PM CDT Mon Aug 3 2026

Hot temperatures continue to be the main headline through the forecast period thanks to high pressure over the southwestern US. Temperatures each day will rise into the upper 90s to low 100s with head indices between 105-110F expected. While we look to remain just shy of Heat Advisory criteria each day, a few locations may briefly exceed 111F. Will continue to monitor for the need of Heat Advisories, but at this time Special Weather Statements will suffice. There is a Moderate (level 2 of 4) to Major (level 3 of 4) Heat Risk every afternoon through Thursday.

While dry conditions will prevail, there does remain a low chance (less than 20%) of an isolated shower or thunderstorm each afternoon along the seabreeze, mainly late week into the weekend.

AVIATION

(00Z TAFS) Issued at 616 PM CDT Mon Aug 3 2026

VFR conditions are expected to prevail through the TAF period with a southeasterly breeze diminishing this evening and returning by mid-morning Tuesday.

MARINE

Issued at 1206 PM CDT Mon Aug 3 2026

An enhanced pressure gradient along the immediate coast will result in daily Small Craft Exercise Caution conditions along the Laguna Madre. Otherwise, expect light to moderate southeasterly winds with 2 to 3 ft seas and 5 to 6 second periods.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 81 97 81 96 / 0 0 0 0 HARLINGEN 77 100 78 99 / 0 0 0 0 MCALLEN 81 101 81 101 / 0 0 0 0 RIO GRANDE CITY 78 102 78 101 / 0 0 0 0 SOUTH PADRE ISLAND 81 89 81 88 / 0 0 0 0 BAYVIEW/PORT ISABEL 79 96 79 95 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

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