textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1204 PM CDT Fri Oct 9 2026

- Hazardous beach and marine conditions expected into this weekend as Hurricane Isaias moves towards the northern Gulf coast. Coastal flooding, dangerous surf, life-threatening rip currents, and rough seas are likely along the lower Texas beaches and Gulf waters.

- Mainly dry conditions expected through the middle of next week, with low rain chances returning by Thursday/Friday.

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

DISCUSSION

Issued at 1204 PM CDT Fri Oct 9 2026

The main focus for the near term will be local coastal impacts from Hurricane Isaias. Hurricane Isaias will bring elevated surf conditions leading to high risk of rip currents into Sunday morning and a High Surf Advisory into Saturday evening. The push of water along the coast from Isaias along with a new moon will lead to higher tides and thus a Coastal flood Advisory is in effect for area beaches until Sunday morning. Conditions should begin to improve late this weekend.

Otherwise, fairly benign conditions will prevail across Deep South Texas and the Rio Grande Valley. Not expecting any rain, across the region outside a stray sea breeze shower or thunderstorm, through at least midweek. A cold front will push into Texas midweek and lead to increasing chances of showers and Thunderstorms by Thursday/Friday.

Temperatures will remain near to just above normal through the week with highs in the low to mid 90s. Heat indices remain in the 90s each afternoon through the first part of the period but as low level moisture increases heat indices will climb to 100-110 degrees each day beginning Monday.

AVIATION

(18Z TAFS) Issued at 1204 PM CDT Fri Oct 9 2026

VFR conditions will prevail through the TAF period. Expect northerly winds to around 10 knots with some higher gusts possible.

MARINE

Issued at 1204 PM CDT Fri Oct 9 2026

Hurricane Isaias has caused seas and swell to build along the lower Texas coastal waters that will continue into this weekend. Small Craft Advisories are now in effect across coastal waters into Saturday, and may need to be extended, mainly on the offshore waters. Conditions will improve late weekend/early next week with light to moderate southeasterly winds and 2 to 4 ft seas.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 89 74 91 78 / 0 0 0 0 HARLINGEN 91 69 93 73 / 0 0 0 0 MCALLEN 93 71 95 77 / 0 0 10 0 RIO GRANDE CITY 93 69 93 74 / 0 0 0 0 SOUTH PADRE ISLAND 86 79 86 81 / 0 0 0 0 BAYVIEW/PORT ISABEL 87 74 89 77 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

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

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

High Surf Advisory until 7 PM CDT Saturday for TXZ451-454-455.

GM...Small Craft Advisory until 7 AM CDT Saturday for GMZ150-155-170- 175.