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 605 AM CDT Tue Sep 22 2026
- Sustained daily opportunity for rainfall, especially Wednesday and Thursday.
- Continued hot temperatures, but no extremes.
- Elevated risk of rip currents at the local beaches.
DISCUSSION
Issued at 1019 PM CDT Mon Sep 21 2026
Broad 500 mb high pressure will remain the dominant weather feature over Deep South Texas and the Rio Grande Valley through the forecast period. However, the center of the high, positioned generally over east Texas, will produce a more easterly and moist flow off of the neighboring Gulf of America, with precipitable water values hovering near 2 inches. This will have the result of enhancing the daily seabreeze boundary, with isolated to scattered showers and thunderstorms across the BRO CWFA. At this time, the best chances for precipitation are Wednesday and Thursday, with the best combination of moisture and easterly flow.
Temperature-wise, above normal to well above normal values will occur, despite the autumnal equinox officially kicking-off on Tuesday 22 September at 7:04 PM CDT.
Finally, winds and seas along the Lower Texas Coast will produce a low to moderate risk of rip currents at the local beaches through the period.
AVIATION
(12Z TAFS) Issued at 605 AM CDT Tue Sep 22 2026
VFR will prevail at the aerodromes through the next 24 hours, with light to moderate winds with breezy gusts and clear to partly cloudy skies. Convection is possible, but will be too isolated to warrant a mention in the current issuance of TAFs.
MARINE
Issued at 1019 PM CDT Mon Sep 21 2026
High pressure over the western Gulf of America will produce light to moderate winds and low to moderate seas along the Lower Texas Coast through the next several days. Small Craft Should Exercise Caution and Small Craft Advisory are not likely to be needed.
PRELIMINARY POINT TEMPS/POPS
BROWNSVILLE 95 80 95 80 / 20 10 60 30 HARLINGEN 98 76 98 76 / 20 10 60 20 MCALLEN 100 79 99 79 / 50 0 60 20 RIO GRANDE CITY 101 77 99 76 / 30 10 50 20 SOUTH PADRE ISLAND 90 83 89 82 / 20 10 50 30 BAYVIEW/PORT ISABEL 94 79 94 79 / 20 10 50 20
BRO WATCHES/WARNINGS/ADVISORIES
None.
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