textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1205 PM CDT Tue Oct 27 2026

- Mostly dry conditions though we could see isolated daily diurnally driven showers/thunderstorms.

- Temperatures will be near normal but increase late week to above normal.

- A Coastal Flood Advisory is in effect until 4 AM Wednesday for the Lower Texas Coast beaches.

DISCUSSION

Issued at 1205 PM CDT Tue Oct 27 2026

Today we maintain a 15-45% chance of showers/thunderstorms mainly along and east of I-69C. Rain chances taper off tonight into Wednesday with only an isolated chance of an afternoon shower or thunderstorm. Thursday, rain chances increase again across northwestern portions of the CWA due to excess moisture moving into northeastern Mexico and Texas from the remnants of Tropical Storm Vance, currently located off the Mexican Pacific coast. Dry conditions will prevail for the remainder of the forecast period outside of a very isolated afternoon shower or thunderstorm.

Temperatures will remain slightly above normal with highs in the upper 80s to low 90s through this weekend with low to mid 90s expected for Monday. At the very tail end of the forecast period there is the potential for a cold front to move though the region which could cool things down a bit.

At area beaches there is a High Risk of Rip Currents through this afternoon. In addition, there is a Coastal Flood Advisory in effect until 4 am Wednesday due to the high astronomical tides. High tide is at 7:48 PM tonight.

AVIATION

(18Z TAFS) Issued at 1205 PM CDT Tue Oct 27 2026

VFR conditions will prevail at all aerodromes. As we progress into the afternoon could see some showers and maybe an embedded thunderstorm at HRL and BRO that could briefly lower ceilings and visibility. Will continue to see light and variable winds through tonight.

MARINE

Issued at 1205 PM CDT Tue Oct 27 2026

Favorable conditions will prevail with light winds, seas of 4-5 ft, and 7 to 8 second periods. Isolated showers and thunderstorms this week could lead to localized areas of increased winds and seas.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 72 87 73 86 / 10 10 0 0 HARLINGEN 69 88 70 86 / 10 10 0 10 MCALLEN 72 91 73 89 / 20 0 0 20 RIO GRANDE CITY 70 91 71 89 / 10 0 10 20 SOUTH PADRE ISLAND 75 81 75 81 / 10 10 10 0 BAYVIEW/PORT ISABEL 70 85 71 84 / 10 10 10 0

BRO WATCHES/WARNINGS/ADVISORIES

TX...Coastal Flood Advisory until 4 AM CDT Wednesday for TXZ451-454- 455.

High Rip Current Risk until 7 PM CDT this evening for TXZ451-454- 455.

GM...None.