textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 958 PM CDT Sat Oct 10 2026

- Hazardous beach conditions continue Sunday. Coastal flooding and life-threatening rip currents are likely along the lower Texas beaches and Gulf waters.

- Mainly dry conditions expected through midweek, with rain chances returning late week in association with a cold front.

- Mostly minor risks of heat-related illnesses (level 1/4) become moderate to major (level 2 to 3/4) by Monday as deep low- level moisture returns.

DISCUSSION

Issued at 958 PM CDT Sat Oct 10 2026

Hazardous coastal conditions will continue into Monday. Elevated surf and long period swell will maintain a High Risk of rip currents through Sunday afternoon, and a Coastal Flood Advisory through Monday morning. Conditions gradually improve tonight into Monday.

Warm and mostly dry conditions prevail for a majority of the week. There is a 20% or less chance of isolated sea breeze showers Monday east of I-69C, and a 10% or less chance for sea breeze showers through Thursday. Rain chances begin to increase late next week with an approaching cold front, bringing potential showers and thunderstorms Friday into the weekend. Temperatures and rain chances along and behind the front will depend on the strength of ridging over the Gulf and how far south the troughing associated with the front extends. Long range guidance continues to show uncertainty with the evolution of this system, so be sure to monitor the forecast for adjustments.

Temperatures remain near to above normal with highs in the low to mid 90s today, climbing to the mid to upper 90s Monday. Increasing low level moisture will push heat indices into the 100- 110 degF range Monday through Thursday. Behind the front, expect near (or even below) normal temperatures.

AVIATION

(00Z TAFS) Issued at 643 PM CDT Sat Oct 10 2026

VFR conditions prevail. Expect an occasional gust to 20 kts through sunset before light southeasterly winds prevail overnight. Winds increase to 10-15 kts Sunday morning, with occasionally higher gusts in the afternoon.

MARINE

Issued at 958 PM CDT Sat Oct 10 2026

Long period swell in the wake of post Tropical Cyclone Isaias will gradually diminish today. Moderate seas gradually diminish into early this week, with moderate onshore to southerly flow. Rain chances stay low (generally 30% or less) through midweek. A cold front late this week may once again deteriorate conditions and increase chances of rain and thunderstorms.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 91 77 90 79 / 0 0 10 20 HARLINGEN 93 73 92 75 / 0 0 10 10 MCALLEN 95 76 94 78 / 10 0 10 0 RIO GRANDE CITY 93 74 94 76 / 0 0 0 0 SOUTH PADRE ISLAND 86 81 86 82 / 0 0 10 10 BAYVIEW/PORT ISABEL 89 76 89 78 / 0 0 10 10

BRO WATCHES/WARNINGS/ADVISORIES

TX...Coastal Flood Advisory until 7 AM CDT Monday for TXZ451-454-455.

High Rip Current Risk through Sunday evening for TXZ451-454-455.

GM...None.