textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 554 PM CDT Thu Sep 10 2026

- Major (level 3 of 4) to Extreme (level 4 of 4) Heat Risk is expected throughout much of Deep South Texas through next week.

- Mostly dry conditions will prevail through Friday with low rain chances returning for Saturday and lingering through next week.

- Low risk of rip currents are area beaches.

DISCUSSION

Issued at 1205 PM CDT Thu Sep 10 2026

Hot temperatures remain the mainstay through the forecast period. Daily max temperatures will reach the triple digits for most locations away from the coast. Heat indices will be between 105 and 110 degrees each day. May need a Heat Advisory for portions of the region on Friday and Saturday, but will defer to later shift for final determination. Otherwise, should stay just shy of Advisory conditions for the remainder of the forecast with SPSs needed. Major (level 3 of 4) to Extreme (level 4 of 4) Heat Risk is expected throughout much of Deep South Texas through next week.

Will remain generally rain free through the period for most locations, though can not rule out some isolated sea breeze activity over the next few days. As we head into late weekend, we have a bit better chance of sea breeze activity each afternoon mainly Sunday afternoon and again midweek.

While there is a low risk of rip currents at area beaches, life threatening rips currents often occur near jetties and piers. Use caution if entering the water.

AVIATION

(00Z TAFS) Issued at 554 PM CDT Thu Sep 10 2026

Through 00z Saturday....VFR conditions are expected to prevail through the 00z TAF cycle under clear to mostly clear skies.

Southeast winds 10-15 kts with gusts as high as 20-25 kts or so will prevail through the forecast period.

MARINE

Issued at 1205 PM CDT Thu Sep 10 2026

While generally favorable conditions will prevail, could see some Small Craft Caution conditions, mainly on the Laguna Madre, each afternoon. Otherwise, expect light to moderate southeasterly winds with seas around 2-4 ft and 4-6 second periods. Any showers or thunderstorms that develop could lead to locally enhanced winds and seas.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 82 99 82 98 / 0 0 0 10 HARLINGEN 78 103 78 102 / 0 0 0 0 MCALLEN 81 105 82 104 / 10 0 0 0 RIO GRANDE CITY 80 106 80 106 / 0 0 0 0 SOUTH PADRE ISLAND 83 90 83 90 / 0 0 0 0 BAYVIEW/PORT ISABEL 79 97 80 97 / 0 0 0 10

BRO WATCHES/WARNINGS/ADVISORIES

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