textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1245 AM CDT Fri Jul 31 2026

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

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

- Widespread Moderate (Level 2 of 4) to Major (Level 3 of 4) Heat Risk with pockets of Extreme (Level 4 of 4) Heat Risk can be expected through next week.

- Isolated to scattered showers and thunderstorms are possible on Sunday ahead of a slowing/stalling cool front.

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

- Mostly Small Craft Exercise Caution (SCEC) conditions over the Laguna Madre will persist through next week.

DISCUSSION

Issued at 1010 PM CDT Thu Jul 30 2026

Hot, mostly dry, and breezy conditions are expected to continue through 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 nearly each day with speeds generally ranging between 15-25 mph and gusts up to 35 mph. Isolated to scattered showers and thunderstorms are possible on Sunday across the region ahead of a stalling/slowing cool front. Chances remain low at this time.

Special Weather Statements (SPSs) to Heat Advisories may be needed each day going forward (especially Friday 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 week. Widespread Moderate (Level 2 of 4) to Major (Level 3 of 4) Heat Risk with pockets of Extreme (Level 4 of 4) Heat Risk can be expected.

AVIATION

(06Z TAFS) Issued at 1245 AM CDT Fri Jul 31 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 1010 PM CDT Thu Jul 30 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 persistently breezy southeast winds from an enhanced pressure gradient. There could be brief periods where winds reach low end Small Craft Advisory.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 97 81 98 81 / 0 0 0 0 HARLINGEN 100 79 102 78 / 0 0 0 0 MCALLEN 103 81 105 81 / 0 0 0 0 RIO GRANDE CITY 104 79 105 79 / 0 0 0 0 SOUTH PADRE ISLAND 88 81 89 81 / 0 0 0 0 BAYVIEW/PORT ISABEL 96 79 97 79 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

None.