textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1234 AM CDT Thu Jul 30 2026

- Hot conditions will persist through the middle parts of next week; Thursday 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 the middle parts of next week.

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

- Breezy southeasterly winds will persist through mid 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 mid next week.

- Borderline Fire Danger Statement (RFD) conditions can be expected through the middle parts of next week.

DISCUSSION

Issued at 1017 PM CDT Wed Jul 29 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 1234 AM CDT Thu Jul 30 2026

Moderate southeast winds with a few passing low clouds prevail across Deep South Texas early this morning. Light to occasionally moderate southeast winds are expected overnight. Southeast winds will increase to 15 to 20 kts by mid to late morning with some gusts around 25 kts in the afternoon. The latest surface observations indicate a few areas of MVFR ceilings across the mid to upper Valley. A brief period or two of MVFR ceilings could impact MFE through around 14Z. Otherwise, VFR conditions are forecast to continue for the next 24 hours.

MARINE

Issued at 1017 PM CDT Wed Jul 29 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 southeasterly 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 97 81 / 0 0 0 0 HARLINGEN 101 77 100 78 / 0 0 0 0 MCALLEN 104 81 104 81 / 0 0 0 0 RIO GRANDE CITY 104 78 104 79 / 0 0 0 0 SOUTH PADRE ISLAND 88 81 89 81 / 0 0 0 0 BAYVIEW/PORT ISABEL 96 79 96 79 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

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