textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 619 AM CDT Wed Jul 29 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

(12Z TAFS) Issued at 619 AM CDT Wed Jul 29 2026

Light southeast winds with a few passing low clouds prevail across Deep South Texas early this morning. Southeast winds will increase to 15 to 20 kts mid to late morning with some gusts around 25 kts in the afternoon. Winds are expected to slowly decrease later this evening. Surface observations indicate a few areas of MVFR ceilings across the mid to upper Valley. A brief period of MVFR ceilings could impact MFE through around 14Z. Otherwise, VFR conditions are forecast to continue for the next 24 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 97 81 97 80 / 0 0 0 0 HARLINGEN 100 78 101 77 / 0 0 0 0 MCALLEN 103 81 104 80 / 0 0 0 0 RIO GRANDE CITY 104 79 105 78 / 0 0 0 0 SOUTH PADRE ISLAND 89 81 89 81 / 0 0 0 0 BAYVIEW/PORT ISABEL 96 80 96 78 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

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