textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1220 PM CDT Tue Jul 28 2026

- Today's heat indices are expected to reach between 105-100 degrees for all of Deep South Texas, excepting coastal areas.

- Heat indices are expected to slightly increase through the end of the week, resulting in areas of Major (level 3 of 4) to Extreme Heat Risk (level 4 of 4).

- Hot and precipitation-free conditions are expected to persist through early next week.

- A Small Craft Advisory is in effect from 11 AM to 7 PM for the Laguna Madre Bay.

- There is a moderate risk of life-threatening rip currents at area beaches through tomorrow.

DISCUSSION

Issued at 1220 PM CDT Tue Jul 28 2026

High pressure remains stationed over the Desert Southwest, which continues to bring hot, dry, and rain-free conditions to Deep South Texas. Dangerously hot temperatures and heat indices will continue to be a concern over the next week, as upper level ridging to the northeast remains in place, with surface high pressure over the Gulf. Little to no precipitation is expected over the next week.

Heat Risk is expected to increase over the next few days to primarily Major (level 3 of 4) with pockets of Extreme (level 4 of 4), especially in urban areas of the Rio Grande Valley. High temperatures are expected to reach the triple digits each day for almost all of Deep South Texas excepting coastal areas, where highs will be in the mid to upper 90s. A Special Weather Statement has been issued today for all of Deep South Texas (excepting coastal areas) for heat indices between 105-100 degrees. Heat indices are expected to slightly increase through the weekend. With the increase comes the potential for Heat Advisories and even possibly Extreme Heat Warnings.

AVIATION

(18Z TAFS) Issued at 1220 PM CDT Tue Jul 28 2026

VFR conditions with light to moderate southeasterly winds (that could become gusty at times) and party cloudy to clear skies are expected for the TAF period.

MARINE

Issued at 1220 PM CDT Tue Jul 28 2026

A Small Craft Advisory is in effect for the Laguna Madre Bay from 11 AM today through 7 PM this evening due to elevated wind speeds from an enhanced pressure gradient. Small Craft Exercise Caution is also possible on the nearshore Gulf Waters. Intermittent SCEC is possible both in the Bay and the Gulf throughout the week as winds may become a bit higher in the afternoons. Otherwise, favorable conditions are expected to prevail.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 82 97 81 98 / 0 0 0 0 HARLINGEN 79 100 78 101 / 0 0 0 0 MCALLEN 81 103 80 104 / 0 0 0 0 RIO GRANDE CITY 79 104 79 105 / 0 0 0 0 SOUTH PADRE ISLAND 81 89 81 88 / 0 0 0 0 BAYVIEW/PORT ISABEL 80 96 79 95 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

TX...None. GM...Small Craft Advisory until 7 PM CDT this evening for GMZ130-132- 135.