textproduct: Brownsville/Rio Grande Valley
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
Updated at 614 AM CDT Sat Sep 5 2026
- Major (level 3 of 4) to Extreme (level 4 of 4) Heat Risk is expected throughout much of Deep South Texas through early next week.
- Sea breeze showers and thunderstorms east of I-69C are possible each afternoon Labor Day Weekend and continuing into next week.
- Low risk of rip currents are area beaches.
DISCUSSION
Issued at 1003 PM CDT Fri Sep 4 2026
Hot temperatures continue through the weekend with afternoon highs reaching into the triple digits for most locations. Heat indices will be between 105 and 110 through Labor Day, though some locations may briefly exceed heat indices of 110. Next week temperatures will still remain quite warm with highs in the upper 90s to low triple digits with heat indices generally between 105 and 110 degrees. A major (level 3 of 4) to Extreme (level 4 of 4) Heat Risk will continue in next week.
Rain chances return to the forecast Saturday through next week, mainly along US 281 and east associated with the seabreeze. Models have trended slightly higher on rain chances Sunday through Wednesday, generally 20 to 40%. The rain chances along with cloud cover could potentially help cool things off in a few locations as well.
While there is a low risk of rip currents at area beaches this weekend, life threatening rips currents often occur near jetties and piers. Use caution if entering the water.
AVIATION
(12Z TAFS) Issued at 614 AM CDT Sat Sep 5 2026
VFR is anticipated at the aerodromes through the next 24 hours. Winds will become breezy today with stronger gusts before diminishing around sunset. Generally partly cloudy skies will prevail with non-free skies.
MARINE
Issued at 1003 PM CDT Fri Sep 4 2026
Generally favorable conditions will prevail. Expect light to moderate southeasterly winds with 2 to 3 ft seas and 5 to 6 second periods. Daily chances of showers and thunderstorms could lead to locally enhanced winds and seas.
PRELIMINARY POINT TEMPS/POPS
BROWNSVILLE 98 81 97 80 / 10 0 30 0 HARLINGEN 102 77 101 76 / 10 0 40 0 MCALLEN 103 81 103 80 / 20 10 30 0 RIO GRANDE CITY 104 79 103 79 / 10 10 30 10 SOUTH PADRE ISLAND 90 82 90 82 / 10 0 20 0 BAYVIEW/PORT ISABEL 96 78 95 78 / 10 0 30 0
BRO WATCHES/WARNINGS/ADVISORIES
None.
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