textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1130 AM CST Sat Nov 22 2025

- Above normal temperatures are expected through Tuesday. A cold front Wednesday looks to bring more seasonable temperatures.

- Scattered showers and thunderstorms are expected to continue this afternoon into Sunday morning. Rain chances look to subside Sunday afternoon, before returning Tuesday.

- Adverse marine conditions are possible Sunday into Monday due to moderate to breezy winds.

- An elevated risk of rip currents will prevail through next week.

DISCUSSION

Issued at 1130 AM CST Sat Nov 22 2025

A frontal boundary stalled just to the north of the CWA is forecast to begin moving back to the north Sunday morning as return flow strengthens along the Lower Texas Coast. Scattered showers will likely continue into Sunday morning with rain chances gradually decreasing as the frontal boundary moves further north. Warm temperatures are forecast to continue into early next week, with high temperatures in the upper 80s to low 90s.

Another cold front is expected to approach Deep South Texas Monday, again, stalling just northwest of the CWA. At the same time, another surface low looks to develop over Southern Canada. The cold front associated with this system is forecast to rapidly drop south across the Great Plains and move through Deep South Texas Wednesday. This front will likely bring cooler temperatures to the area. High temperatures Wednesday through Friday are forecast to largely remain in the 70s, with some areas along the Rio Grande possibly reaching the low 80s. Wednesday night looks to be the coolest night in the forecast period, with low temperatures falling into the upper 40s across northern portions of the CWA and low to mid 50s elsewhere.

Rain chances will begin to increase to 40-50% again Tuesday evening through Wednesday ahead of and along the cold front.

AVIATION

(18Z TAFS) Issued at 1130 AM CST Sat Nov 22 2025

Ongoing scattered showers across the area are expected to continue this afternoon. Some of the showers may briefly move over an airfield, which could drop ceilings or visibilities to MVFR levels temporarily. HiRes models show most of the convection subsiding around the TAF sites this evening, though another round of showers could be possible Sunday morning.

Overnight, confidence is increasing for low stratus to develop across much of the area, likely dropping ceilings to MVFR levels, though IFR or LIFR ceilings may develop around sunrise Sunday.

MARINE

Issued at 1130 AM CST Sat Nov 22 2025

Adverse marine conditions are forecast to develop Sunday as southeasterly winds along the Lower Texas Coast increase to 20-25 knots, building seas to 5-6 feet. Small Craft Should Exercise Caution headlines or Small Craft Advisories will likely be needed Sunday evening through Monday. Generally favorable conditions are expected to briefly return Tuesday, however a cold front moving through the area Wednesday may bring another round of adverse conditions.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 87 72 86 73 / 50 20 20 0 HARLINGEN 88 69 88 69 / 50 20 20 0 MCALLEN 90 72 90 73 / 50 30 20 0 RIO GRANDE CITY 89 70 90 70 / 40 40 20 0 SOUTH PADRE ISLAND 83 75 82 76 / 50 30 20 0 BAYVIEW/PORT ISABEL 85 71 85 71 / 50 30 20 0

BRO WATCHES/WARNINGS/ADVISORIES

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