textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 613 AM CDT Wed Jul 1 2026

* Mainly rain-free and at times breezy conditions will prevail through next week; low, non-zero probability of a rogue sea breeze shower or thunderstorm each afternoon through Friday.

* Peak heat indices between 100-110F degrees will result in widespread Moderate (Level 2 of 4) Heat Risk across Deep South Texas each day. * Favorable marine conditions can be expected through next week with light to moderate winds and low to moderate seas.

DISCUSSION

Issued at 1041 PM CDT Tue Jun 30 2026

Hot and mostly dry conditions continue into the weekend under broad mid-level ridging over eastern CONUS. Temperatures will remain seasonable for late June/early July, with highs in the upper 90s to low 100s (80s along the coast) and lows in the 70s. Heat indices from 100-110 degF each afternoon will maintain a moderate risk of heat related illness. Breezy south-southeasterly winds continue each afternoon and evening with winds gusting around 25 mph.

Abundant moisture in place thanks to persistent southeasterly winds may interact with shortwaves on the periphery of the aforementioned ridge, bringing a chance for isolated showers or thunderstorms during the afternoon hours. Today through Friday, isolated showers and thunderstorms are possible each afternoon along the sea breeze.

AVIATION

(12Z TAFS) Issued at 613 AM CDT Wed Jul 1 2026

Ongoing MVFR ceilings at MFE are forecast to improve by mid morning. Otherwise, VFR conditions are forecast to continue through the period. Southeasterly winds are forecast to continue through the period, with wind gusts increasing through the afternoon. There is a low probability for another round of MVFR ceilings developing early Thursday morning at MFE.

MARINE

Issued at 1041 PM CDT Tue Jun 30 2026

Favorable conditions are expected through the forecast with gentle to moderate southeasterly flow and slight seas. There is a chance of isolated showers and thunderstorms each afternoon through Friday. Gusty winds over the Laguna Madre each afternoon and evening may bring brief Small Craft Exercise Caution conditions.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 94 79 94 79 / 10 0 10 0 HARLINGEN 95 76 95 76 / 10 0 20 0 MCALLEN 98 79 98 79 / 10 0 20 0 RIO GRANDE CITY 99 77 98 77 / 0 0 10 0 SOUTH PADRE ISLAND 87 80 86 80 / 10 10 10 0 BAYVIEW/PORT ISABEL 91 78 91 78 / 10 0 10 0

BRO WATCHES/WARNINGS/ADVISORIES

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