textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1247 AM 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 may 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 next weekend with speeds between 15-25 mph and peak gusts between 30-40 mph; Tuesday will be the breeziest day of the forecast period.

- A Small Craft Advisory is in effect for the Laguna Madre due to gusty winds on Tuesday from Noon-7 Pm CDT; Otherwise, Small Craft Exercise Caution (SCEC) conditions will persist through next weekend.

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

DISCUSSION

Issued at 1038 PM CDT Mon Jul 27 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 between 15- 25 mph and gusts between 30-40 mph. Tuesday may be the breeziest day of the forecast period with speeds between 20-30 mph and gusts up to 40 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 will be on the increase 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

(06Z TAFS) Issued at 1247 AM CDT Tue Jul 28 2026

The aerodromes will experience generally VFR through the next 24 hours, with limited cloud cover and rain-free skies. Light to moderate winds during the overnight hours will become breezy with stronger gusts during daylight.

MARINE

Issued at 1038 PM CDT Mon Jul 27 2026

Generally favorable marine conditions will persist through the forecast period with mainly moderate winds and seas. Small Craft Exercise Caution (SCEC) conditions may be needed each day over the Laguna Madre due to breezy southeasterly winds from and enhanced pressure gradient. Tuesday will be the breeziest day and winds will be high end SCEC to low end Small Craft Advisory. A Small Craft Advisory has been issued for the Laguna Madre on Tuesday from Noon- 7 PM CDT.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 96 82 97 81 / 0 0 0 0 HARLINGEN 99 79 100 78 / 0 0 0 0 MCALLEN 101 81 103 80 / 0 0 0 0 RIO GRANDE CITY 103 79 104 79 / 0 0 0 0 SOUTH PADRE ISLAND 88 81 89 81 / 0 0 0 0 BAYVIEW/PORT ISABEL 95 80 96 79 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

TX...None. GM...Small Craft Advisory from noon today to 7 PM CDT this evening for GMZ130-132-135.