textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 938 PM CDT Tue Jul 28 2026

- Hot conditions will persist through early next week; Thursday through Sunday will be the hottest period; SPSs to Heat Advisories will likely be needed.

- High temperatures generally will range between the upper 90s to mid 100s with peak heat indices between 105-115F degrees through early next week.

- Widespread Major (Level 3 of 4) with pockets of Extreme (Level 4 of 4) Heat Risk can be expected through early next week.

- Breezy southeasterly winds will persist through early next week with speeds between 15-25 mph and peak gusts up to 35 mph.

- Small Craft Exercise Caution (SCEC) to low end Small Craft Advisory conditions will persist through early next week.

- Borderline Fire Danger Statement (RFD) conditions can be expected through next weekend.

DISCUSSION

Issued at 938 PM CDT Tue Jul 28 2026

Hot, dry, and breezy conditions are expected to continue through early next week. Driving our weather pattern will be a strong 591- 594 dam sub-tropical heat ridge centered over the Desert Southwest. Additionally, an enhanced pressure and thermal gradient will result in breezy southeast winds each day with speeds generally ranging between 15-25 mph and gusts up to 35 mph.

Special Weather Statements (SPSs) to Heat Advisories may be needed each day going forward (especially Thursday through Sunday) as daytime high temperatures will range between the upper 90s to mid 100s with peak heat indices ranging generally between 105-115F degrees.

Heat Risk concerns will continue through next weekend. Widespread Major (Level 3 of 4) Heat Risk can be expected over Deep South Texas with pockets of Extreme (Level 4 of 4) Heat Risk along the Rio Grande Valley and coastal areas.

AVIATION

(00Z TAFS) Issued at 545 PM CDT Tue Jul 28 2026

Through 00z Thursday....VFR conditons are expected to prevail through the 00z TAF cycle.

Winds will remain breezy out of the southeast through the 00z TAF period with speeds between 10-20 kts and gusts as high as 25 kts or so, especially during the afternoon hours.

MARINE

Issued at 938 PM CDT Tue Jul 28 2026

Generally favorable marine conditions will persist through the forecast period with mainly moderate winds and low to moderate seas. Small Craft Exercise Caution (SCEC) conditions will likely be needed each day over the Laguna Madre due to persistent breezy southeasterly winds from and enhanced pressure gradient. There could be periods where winds reach low end Small Craft Advisory.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 81 97 81 97 / 0 0 0 0 HARLINGEN 79 100 78 100 / 0 0 0 0 MCALLEN 81 103 80 104 / 0 0 0 0 RIO GRANDE CITY 79 104 79 104 / 0 0 0 0 SOUTH PADRE ISLAND 81 88 81 88 / 0 0 0 0 BAYVIEW/PORT ISABEL 80 95 79 95 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

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