textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1129 AM CST Sun Nov 30 2025

* Cool temperatures and overcast skies are forecast through Tuesday. Southeasterly winds look to bring warmer temperatures Wednesday.

* Adverse to dangerous surf and marine conditions are forecast to continue through Monday morning

* Another cold front looks to move through the area Thursday, bringing additional rain chances through the end of the week.

DISCUSSION

Issued at 1129 AM CST Sun Nov 30 2025

In the wake of today's cold front, cool temperatures and lingering rain chances are forecast for the next couple days. Temperatures behind the front are forecast to range from the upper 50s to 60s this afternoon. Low temperatures tonight are forecast to fall into the 40s across the area. Northerly winds look to continue into the day Monday, supporting additional CAA while mostly cloudy skies will limit daytime heating. This combination will likely keep high temperatures in the 50s Monday afternoon.

A coastal trough will likely develop in the wake of the front, though there is some uncertainty in how far offshore this trough develops. This will likely result in mostly cloudy skies continuing in the wake of the front, as well as the potential for interment light rain or drizzle through Monday.

Southeasterly winds look to briefly return Wednesday, before another cold front arrives on Thursday. This will likely allow high temperatures to climb into the upper 70s to low 80s Wednesday afternoon before falling back to the low to mid 70s behind the front Thursday. Rain chances will increase with the front on Thursday and remain elevated going into the weekend as an overrunning pattern looks to set up over the shallow cold front.

AVIATION

(18Z TAFS) Issued at 1129 AM CST Sun Nov 30 2025

MVFR to IFR conditions are forecast to continue through the TAF period. Ongoing showers at HRL and BRO are forecast to continue for another hour or two, with intermittent periods of light rain or drizzle possible across the area through tonight. The probabilities for rain are generally too low for inclusion in the TAFs, however rain chances do look to increase around sunrise at BRO and HRL, warranting a brief PROB30 group. MVFR ceilings will likely prevail through the majority of the period, though some intermittent IFR ceilings will be possible overnight.

MARINE

Issued at 1129 AM CST Sun Nov 30 2025

Hazardous marine conditions are forecast to continue into Monday morning. Northerly winds between 20-25 knot are forecast to build seas to 6-7 feet this afternoon and tonight. Conditions are forecast to briefly improve by Monday afternoon but an other surge of northerly winds Monday night will likely bring another round of adverse conditions.

A Small Craft Advisory remain in effect until 6 AM Monday, and additional Small Craft Advisories or Small Craft Should Exercise Caution headlines will likely be needed Monday night into Tuesday.

Generally favorable conditions are forecast to return Tuesday evening, with winds briefly shift back to the southeast Wednesday. Another cold front is forecast to move through the area Thursday, though wind speeds look to remain lower with this front.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 49 65 54 64 / 50 30 20 20 HARLINGEN 47 62 49 62 / 40 30 10 10 MCALLEN 48 63 52 63 / 30 20 10 10 RIO GRANDE CITY 47 64 50 63 / 30 10 10 0 SOUTH PADRE ISLAND 54 67 56 68 / 70 40 40 20 BAYVIEW/PORT ISABEL 49 65 50 66 / 60 30 30 10

BRO WATCHES/WARNINGS/ADVISORIES

TX...High Rip Current Risk through Monday afternoon for TXZ451-454- 455.

GM...Small Craft Advisory until 6 AM CST Monday for GMZ130-132-135- 150-155-170-175.