textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 130 PM CDT Wed Aug 12 2026

- Near to above normal temperatures continue through at least mid to late August across Deep South Texas.

- Dry weather, with intermittent isolated convection possible on Friday along the sea breeze.

- Slightly adverse marine conditions through Friday.

- Elevated risk of rip currents at the local beaches.

DISCUSSION

Issued at 130 PM CDT Wed Aug 12 2026

Heat will continue to be the main weather concern through early next week 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). Afternoon heat index values will range from 100-110 degrees each day due to the combination of hot temperatures and elevated humidity, especially closer to the coast. A few ares may briefly reach 111-113 degrees each afternoon, and a Heat Advisory cannot be ruled out each day if confidence and coverage increase. There wont be much relief from the heat at night, with most areas only realizing lows in the upper 70s and low 80s.

A tightening pressure gradient will result in another windy day tomorrow, with wind gusts ranging from 25-30 MPH by mid to late morning through the late afternoon hours. By Friday and into early next week, the pressure gradient slackens somewhat, which will allow for southerly to southeasterly winds around 10-15 MPH with occasional gusts to 15-20 MPH. Otherwise, rain-free conditions are expected to continue through early next week. The exception is on Friday, with a low chance (around 20%) for showers and storms, mainly along the sea breeze.

AVIATION

(18Z TAFS) Issued at 130 PM CDT Wed Aug 12 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 25-30 knots, before falling around or below 10 knots tonight. Wind speeds should increase once again by late tomorrow morning, with gusts up to 25-30 knots once again.

MARINE

Issued at 130 PM CDT Wed Aug 12 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 82 97 82 96 / 0 0 10 20 HARLINGEN 79 100 79 99 / 0 0 10 20 MCALLEN 82 103 82 102 / 0 0 0 10 RIO GRANDE CITY 79 104 80 102 / 0 0 0 10 SOUTH PADRE ISLAND 82 90 81 90 / 0 0 20 10 BAYVIEW/PORT ISABEL 81 97 80 96 / 0 0 10 10

BRO WATCHES/WARNINGS/ADVISORIES

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