textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 627 AM CDT Mon Aug 10 2026

- Sustained dry weather for the new work week.

- Daytime highs increasing each day, with a Moderate to Extreme Heat Risk. - Small Craft Should Exercise Caution to Small Craft Advisory more likely starting Wednesday.

- Moderate to High Risk of rip currents at local beaches due to increasing winds and building seas.

DISCUSSION

Issued at 1009 PM CDT Sun Aug 9 2026

The KBRO upper air sounding from this evening indicated a precipitable water value of 2.08 inches, which supported an even more robust smattering of convection earlier today across the BRO CWFA. Unfortunately, a rapidly-waning moisture content within the atmosphere will prevent additional showers and thunderstorms for Monday and for the remainder of the forecast period, with dry weather prevailing.

Temperature-wise, daily high temperatures will inch up a degree or two each successive day into well above normal levels. This will cause a Moderate to Major Heat Risk across Deep South Texas and the Rio Grande Valley to become Major to Extreme as the week progresses.

Finally, with a gradually tightening pressure gradient along the Lower Texas Coast expected, a Moderate to High Risk of rip currents at the local beaches will likely occur daily.

AVIATION

(12Z TAFS) Issued at 627 AM CDT Mon Aug 10 2026

Mostly clear skies and light southeast winds prevail across Deep South Texas early this morning. Light southeast winds will become moderate to breezy later this morning into the afternoon. Winds are expected to slowly decrease later this evening into tonight. VFR conditions are forecast for the next 24 hours.

MARINE

Issued at 1009 PM CDT Sun Aug 9 2026

The pressure gradient over the western Gulf of America is expected to become enhanced during the forecast period. Light to moderate winds and low to moderate seas initially will become moderate to breezy winds and moderate to slightly adverse seas beginning around the middle of the week. Small Craft Should Exercise Caution and possibly Small Craft Advisory will be needed Wednesday through Thursday night to account for the anticipated stronger winds and higher seas. Marine conditions should then improve for the end of the work week.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 96 81 96 81 / 0 0 0 0 HARLINGEN 99 77 99 77 / 10 0 0 0 MCALLEN 102 81 102 81 / 0 0 0 0 RIO GRANDE CITY 102 79 103 78 / 0 0 0 0 SOUTH PADRE ISLAND 89 81 89 81 / 10 0 0 0 BAYVIEW/PORT ISABEL 96 79 96 80 / 10 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

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