textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 553 PM CDT Wed Jul 29 2026

- Rain free conditions will prevail through next weekend.

- Temperatures and heat indices in the triple digits will lead to the potential for Heat Advisories, especially Friday and Saturday.

- Widespread Major (Level 3 of 4) with pockets of Extreme (Level 4 of 4) Heat Risk can be expected through early next week.

- A moderate risk of rip currents along the lower Texas beaches through Tuesday.

DISCUSSION

Issued at 1203 PM CDT Wed Jul 29 2026

Hot and generally rain free conditions will continue through the forecast period thanks to upper-level ridging centered over the SW U.S.

Heat will be the main focus this week as afternoon temperatures will rise into the upper 90s along the coast to the 100s inland. Heat index values are forecast to generally peak around 108-115 degrees each afternoon. Have held of on a Heat Advisory for Thursday as current forecast indicates we will remain just shy of criteria. However, as we head into Friday and Saturday the likelihood of heat advisories increases.

The combination of high afternoon temperatures and humidity will lead to a Major Heat Risk (level 3 of 4) across most of Deep South Texas with pockets of Extreme Heat Risk (level 4 of 4).

While we are expecting generally dry conditions, the aforementioned ridge will retreat slightly late this weekend into early week as a trough digs across the eastern US. This will allow for increasing moisture and the low possibility (15-20%) of an isolated shower or thunderstorm, mainly on Sunday.

At area beaches, there is a moderate risk of rip currents through tonight.

AVIATION

(00Z TAFS) Issued at 553 PM CDT Wed Jul 29 2026

Through 00z Friday....VFR conditons are expected to prevail through the 00z TAF cycle.

Winds will remain breezy out of the southeast through the 00z TAF period with speeds between 10-20 kts and gusts as high as 25 kts or so, particularly during the afternoon hours.

MARINE

Issued at 1203 PM CDT Wed Jul 29 2026

An enhanced pressure gradient along the immediate coast will result in daily Small Craft Exercise Caution conditions along the Laguna Madre and nearshore Gulf waters. Otherwise, expect light to moderate southeasterly winds with 2 to 3 ft seas and 5 to 6 second periods.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 81 97 80 97 / 0 0 0 0 HARLINGEN 78 100 77 100 / 0 0 0 0 MCALLEN 81 103 81 103 / 0 0 0 0 RIO GRANDE CITY 79 104 78 104 / 0 0 0 0 SOUTH PADRE ISLAND 81 88 81 89 / 0 0 0 0 BAYVIEW/PORT ISABEL 79 95 79 96 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

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