textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 125 PM CDT Tue Aug 11 2026

- Unseasonably hot high temperatures through the forecast.

- Dry weather, with isolated convection possible on Friday.

- Slightly adverse winds Wednesday through Friday for mariners.

- Elevated risk of rip currents for the second half of the week.

DISCUSSION

Issued at 125 PM CDT Tue Aug 11 2026

Heat will continue to be the main weather concern through the weekend across Deep South Texas as the region remains under the influence of ridging aloft. Near to slightly above normal high temperatures will persist through at least mid to late August, with highs ranging from the mid to upper 90s along the immediate coast and around 100-105 degrees further inland (generally along and west of I-69E). In combination with elevated humidity via persistent low level southerly to southeasterly flow, afternoon heat index values will range from 100-110 degrees each day. Some slightly deeper mixing will result in slightly lower dew points, mainly along and west of US-281, but heat indices should still remain in the triple-digits. An isolated shower or storm cannot be ruled out, but rain chances are expected to remain fairly low (10% or less) with the exception on Friday with around a 20% chance along the sea breeze. Otherwise, a tightening pressure gradient will result in wind gusts closer to 25-30 MPH by tomorrow and Thursday afternoons, before decreasing slightly by Friday and into the weekend closer to 15-20 MPH.

AVIATION

(18Z TAFS) Issued at 125 PM CDT Tue Aug 11 2026

VFR will prevail through the forecast period at all TAF sites. Expect breezy southerly through southeasterly winds through the early evening hours with gusts up to 20-25 knots, before falling around or below 10 knots tonight. Wind speeds should increase once again by late tomorrow morning.

MARINE

Issued at 125 PM CDT Tue Aug 11 2026

Low to moderate seas and light to moderate southerly to southeasterly winds will prevail through the the end of the week and into the weekend across the Gulf waters and Laguna Madre. Expect Small Craft Exercise Caution conditions along the Laguna Madre and nearshore Gulf waters each day from the late morning hours to early evening hours due to an enhanced pressure gradient. A brief Small Craft Advisory cannot be ruled out due to occasional gusts upwards of 20 knots.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 81 97 81 96 / 0 0 0 0 HARLINGEN 77 100 78 99 / 0 0 0 0 MCALLEN 81 103 81 102 / 0 0 0 0 RIO GRANDE CITY 79 104 79 103 / 0 0 0 0 SOUTH PADRE ISLAND 82 90 82 89 / 0 0 0 0 BAYVIEW/PORT ISABEL 80 96 80 96 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

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