textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 613 AM CDT Sat Jun 6 2026

* Rain-free weather conditions are expected to prevail through next week; an outside chance (20%) for an isolated shower or thunderstorm is possible Sunday and Monday.

* Seasonable temperatures on persistent east-southeast winds will prevail through next week; heat risk could begin increasing over the weekend becoming more widespread next week.

* Moderate (Level 2 of 5) Heat Risk is expected over the weekend persisting through next week; isolated pockets of Major (Level 3 of 4) Heat Risk is possible mid to late next week; peak heat indices will range between 100-110F degrees.

DISCUSSION

Issued at 942 PM CDT Fri Jun 5 2026

Courtesy of a strengthening 588-591 dam heat ridge, drier trends (compared to the past several days) featuring mainly rain-free weather is expected to prevail through next week. There could be a rogue shower or thunderstorm on Sunday or Monday.

Normal to slightly warmer than normal temperatures can be expected through next week. High temperatures are expected to run between the lower-mid 90s near the coast to the mid to upper 90s west. Meanwhile, overnight lows are expected to be mainly in the 70s (80s across much of Cameron County) through next week.

Heat Risk is expected to increase this weekend becoming widespread Sunday through next week in conjunction with the strengthening heat ridge. Currently, we have Moderate (Level 2 of 5) Heat Risk developing over much, if not all, of Deep South Texas on Saturday and persisting through next Saturday. Isolated pockets of Major (Level 3 of 4) Heat Risk is possible in the highly populated urban areas of Brownsville and Harlingen Wednesday through next Saturday. Heat indices are progged to range between 100-110F degrees this weekend through late next week.

AVIATION

(12Z TAFS) Issued at 613 AM CDT Sat Jun 6 2026

VFR conditions are expected to generally prevail through the TAF period with elevated low level moisture from Friday rainfall producing patchy fog and MVFR visibility near HRL over the next hour or two. An isolated shower or brief thunderstorm this afternoon cannot be ruled out along the sea breeze, with low confidence in any direct impacts at RGV aerodromes.

MARINE

Issued at 942 PM CDT Fri Jun 5 2026

Favorable marine conditions with light to moderate winds and seas are expected to persist through much of the forecast period. The only exception will be Sunday through Monday as slightly stronger winds could result in adverse marine conditions such as Small Craft Exercise Caution (SCEC) conditions.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 92 81 90 82 / 10 10 20 20 HARLINGEN 92 78 90 78 / 10 0 10 10 MCALLEN 95 80 92 80 / 0 0 10 10 RIO GRANDE CITY 96 78 94 78 / 0 0 10 10 SOUTH PADRE ISLAND 87 83 86 84 / 10 20 20 20 BAYVIEW/PORT ISABEL 90 81 89 81 / 10 10 20 20

BRO WATCHES/WARNINGS/ADVISORIES

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