textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1221 AM CDT Fri Jun 26 2026 * Rain-free conditions with seasonable temperatures will prevail through next week.

* Peak heat indices between 100-110F degrees will result in widespread Moderate (Level 2 of 4) Heat Risk across Deep South Texas each day. * It will also be breezy at times with southerly winds 15-25 mph, gusting as high as 40 mph; winds could gusts over 40 mph at times, particularly Friday through Monday.

* There remains a Moderate Risk of life-threatening rip and longshore currents at area beaches.

DISCUSSION

Issued at 1031 PM CDT Thu Jun 25 2026

Rain-free and breezy conditions with seasonable temperatures will be the theme through the forecast period or through next week. A 591- 594 dam sub-tropical heat ridge will be the driver of our dry and tranquil weather pattern through the forecast period.

Next week, Deep South Texas will sit on the west-southwest flank of the anomalously strong heat dome as it looks to shift towards the Midwest/Great Lakes region, which will result in a widespread heat wave across the central and eastern U.S.

An enhanced pressure gradient near the sfc will result in breezy conditions at times through the forecast period. Southerly winds 15-25 mph could gusts up to 40 mph nearly each day. Winds could gusts over 40 mph at times, particularly Friday through Monday.

Since the heat ridge/dome will not be directly overhead, temps will be of seasonable levels. Daytime high temperatures will range between the mid 90s close to the coast to near 100F degrees far west/inland each day. Meanwhile, overnight low temperatures will be in the mid 70s across the Northern Ranchlands to the upper 70s/lower 80s along the Rio Grande Valley each night. Despite these seasonable level temperatures, there will continue to be widespread Moderate (Level 2 of 4) Heat Risk across the region through next week with peak heat indices ranging between 100-110F degrees.

AVIATION

(06Z TAFS) Issued at 1221 AM CDT Fri Jun 26 2026

VFR conditions are forecast to continue through the period. Winds are forecast to remain out of the southeast around 10 knots overnight. Wind speeds and gusts are forecast to increase after sunrise, with gusty southeasterly to southerly winds continuing through the afternoon.

MARINE

Issued at 1031 PM CDT Thu Jun 25 2026

Breezy southeasterly winds will result in moderate seas to at times Small Craft Exercise caution (SCEC) conditions through at least Monday of next week. Tuesday through Wednesday, low to moderate seas are possible.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 94 81 94 81 / 0 0 0 0 HARLINGEN 95 78 95 79 / 0 0 0 0 MCALLEN 97 80 97 80 / 0 0 0 0 RIO GRANDE CITY 100 77 99 78 / 0 0 0 0 SOUTH PADRE ISLAND 87 82 88 82 / 0 0 0 0 BAYVIEW/PORT ISABEL 92 80 91 80 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

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