textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1205 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

(18Z TAFS) Issued at 1205 PM CDT Thu Sep 10 2026

VFR conditions will prevail through the TAF period. Could see a stray sea breeze shower or thunderstorms this afternoon but confidence very low so did not include in the TAF package. South to southeasterly winds will gust to around 25 kts this afternoon before decreasing this evening.

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 97 / 0 0 0 10 HARLINGEN 78 103 78 101 / 0 0 0 0 MCALLEN 81 105 82 104 / 10 0 0 0 RIO GRANDE CITY 80 106 80 105 / 0 0 0 0 SOUTH PADRE ISLAND 83 90 83 90 / 0 0 0 0 BAYVIEW/PORT ISABEL 79 97 80 96 / 0 0 0 10

BRO WATCHES/WARNINGS/ADVISORIES

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