textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1224 AM CDT Tue Jun 9 2026

- Hot and dry conditions for much of the week. Low to medium rain chances return Friday into the weekend.

- Temperatures increase to the mid to upper 90s across much of the region. Moderate Heat Risk is expected through the week.

DISCUSSION

Issued at 1018 PM CDT Mon Jun 8 2026

Mid-level ridging and high pressure over the Gulf will dominate the weather pattern through much of the week, leading to warmer and generally drier conditions across deep South Texas. While sufficient low-level moisture will remain in place (PWATs around 2"), rain chances will stay low (10% or less) through Thursday, with isolated coastal and sea breeze showers during the day possible. An inverted trough moving westward late in the week may advect deep tropical moisture into deep S TX and support an increase in isolated shower and thunderstorm activity Friday through the weekend. Rain chances increase to low (10-20%) Friday, and low to moderate (20-50%) for much of the weekend. There is uncertainty around how far north this atmospheric moisture will reach, so continue to monitor the forecast for updates.

The main concern this workweek will be heat. High temperatures in the mid to upper 90s, with heat indices ranging from 100 to 110 degrees will maintain a Moderate Risk of heat related illness through the week.

At local beaches, a moderate rip current risk continues Tuesday. In the latter half of the week, hazardous beach conditions including increased rip current risk and minor coastal flooding are possible as swell periods increase and the approach of a new moon raises tides.

AVIATION

(06Z TAFS) Issued at 1224 AM CDT Tue Jun 9 2026

MVFR to VFR will prevail at the aerodromes through the next 24 hours. Light winds for the nighttime hours will become breezy during daylight. Convection is not anticipated for Tuesday, but it may need to be included in the next TAF issuance if models become more aggressive and suggest it.

MARINE

Issued at 1018 PM CDT Mon Jun 8 2026

Rain chances diminish tonight, with low chances expected through the week. Moderate southeasterly flow and slight to moderate seas persist, with swell building through the end of the week. Rain chances return this weekend.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 93 81 93 81 / 0 10 0 0 HARLINGEN 93 77 93 78 / 10 10 0 0 MCALLEN 96 79 96 80 / 0 10 10 0 RIO GRANDE CITY 96 77 97 78 / 0 0 0 0 SOUTH PADRE ISLAND 87 83 87 83 / 0 10 0 0 BAYVIEW/PORT ISABEL 90 81 90 81 / 0 10 0 0

BRO WATCHES/WARNINGS/ADVISORIES

None.