textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1238 AM CDT Sat Aug 1 2026

- Hot conditions will persist through next week; Saturday through Monday 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.

- Breezy southeasterly winds will persist nearly each day through next week with speeds generally between 10-25 mph and peak gusts up to 35 mph.

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

- Borderline Fire Danger Statement (RFD) conditions can be expected at times through next week.

DISCUSSION

Issued at 1028 PM CDT Fri Jul 31 2026

Hot, dry, and breezy conditions are expected to continue through the middle parts of 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.

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 the middle parts of next week. Widespread 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 1238 AM CDT Sat Aug 1 2026

Favorable aviation conditions are expected through the next 24 hours with limited cloud cover and rain-free skies. Winds will be light at night but breezy during the daytime with stronger gusts.

MARINE

Issued at 1028 PM CDT Fri Jul 31 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 98 81 100 80 / 0 0 10 0 HARLINGEN 103 78 103 77 / 0 0 10 0 MCALLEN 106 81 106 80 / 0 0 10 0 RIO GRANDE CITY 105 79 104 79 / 0 0 10 10 SOUTH PADRE ISLAND 89 81 90 80 / 0 0 0 0 BAYVIEW/PORT ISABEL 98 79 98 78 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

TX...Heat Advisory from 1 PM this afternoon to 6 PM CDT this evening for TXZ251.

GM...None.