textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1234 AM CDT Fri Oct 23 2026

- Minimal rain chances are anticipated to continue tonight into the beginning of next week before low to medium chances of rain return Tuesday.

- Near average temperatures and patchy to widespread minor risks of heat-related illnesses (level 1/4) continue.

DISCUSSION

Issued at 958 PM CDT Thu Oct 22 2026

Pleasant weather expected for much of the short term as ridging builds overhead. Mostly dry conditions are expected through the weekend, with only a low (20-30%) chance of showers Saturday in the mid-upper RGV and Rio Grande Plains as a weak shortwave transits through. Moisture will be somewhat limited, keeping rainfall coverage low. Temperatures will remain seasonal, with highs in the upper 80s to low 90s and overnight lows in the 60s inland to lower 70s along the coast.

Rain chances increase again early next week as ridging shifts offshore and an upper-level trough moves eastward across central CONUS. Although the trough is expected to remain north of the region, increasing moisture and instability will support scattered showers and thunderstorms developing as early as Monday night. Low to moderate PoPs (30-50%) are expected Tuesday into Wednesday as moisture is pulled inland from the Gulf. Rain chances could persist through late next week as an upper-level disturbance could transport further deeper moisture into the region.

AVIATION

(06Z TAFS) Issued at 1234 AM CDT Fri Oct 23 2026

Light northeast winds and mostly clear skies prevail across Deep South Texas early this morning. Light and variable winds overnight will become easterly around 10 knots later this morning into the afternoon. VFR conditions will continue for the next 24 hours.

MARINE

Issued at 958 PM CDT Thu Oct 22 2026

Gentle to moderate onshore winds and slight seas prevail into Saturday. Winds increase and seas build to moderate this weekend ahead of an approaching trough, returning adverse marine conditions. Low (10% or less) rain chances today and this weekend will increase as the trough transits eastward, increasing rain chances early next week.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 86 72 86 73 / 0 0 10 0 HARLINGEN 87 68 87 70 / 0 0 10 0 MCALLEN 90 71 90 72 / 0 10 30 0 RIO GRANDE CITY 90 68 90 71 / 0 10 30 0 SOUTH PADRE ISLAND 80 75 81 76 / 0 0 0 0 BAYVIEW/PORT ISABEL 83 70 84 72 / 0 0 10 0

BRO WATCHES/WARNINGS/ADVISORIES

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