textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 535 PM CDT Sat Oct 17 2026

- Coolest temperatures of the season continue through the weekend with lows in the 50s tonight and highs in the 70s on Sunday.

- Breezy north winds 15-25 mph gusting as high as 35 mph will continue through late this evening before gradually subsiding tonight.

- A warming trend develops next week with temperatures returning to warmer than normal levels; there is a low-medium (20-40%) chance for showers in the Tuesday-Wednesday timeframe.

DISCUSSION

Issued at 125 PM CDT Sat Oct 17 2026

Our first taste of fall will continue this weekend across Deep South Texas, with temperatures ranging around 10-20 degrees below normal for mid October. High pressure continues usher in a cooler and drier air mass via persistent cold air advection, with northerly winds gusting to around 20-30 MPH this afternoon. Winds should begin to subside later this evening across the region as high pressure settles in with the exception being across the Gulf water and coastal islands. The combination of mostly clear skies and light winds will promote efficient radiational cooling tonight, allowing for low temperatures to fall into the 50s region wide. The exception will be along the immediate coast where temperatures will remain in the low 60s, but a few areas may briefly dip into the upper 50s late tonight into early tomorrow morning.

A pleasant day is expected on Sunday with highs in the 70s and northerly winds around 5-10 MPH with occasionally higher gusts. Isolated showers may develop from mid morning to late afternoon, mainly along and east of I-69E, but should be fairly brief. Otherwise, expect a warming trend through the week with highs warming into the low 90s by mid week. Low rain chances (around 20-30%) will continue along the immediate coast through mid week.

Along the lower Texas beaches, expect a moderate to high risk of rip currents to continue through the weekend before conditions improve next week.

AVIATION

(00Z TAFS) Issued at 535 PM CDT Sat Oct 17 2026

Through 00z Monday....VFR conditions are expected to prevail through the 00z TAF cycle.

Northerly winds 10-15 kts gusting to 20-25 kts will wane as the evening progresses to 5-10 kts later tonight. There could be a few gusts overnight between 15-20 kts, especially for KBRO and KHRL. During the day on Sunday, northerly winds will continue with speeds between 5-15 kts with some occasional gusts up to 20 kts. Later Sunday afternoon/evening, these winds will subside to speeds up to 5 kts (if not calm) by Sunday night.

MARINE

Issued at 125 PM CDT Sat Oct 17 2026

Adverse marine conditions across the Gulf will continue through late tonight with a Small Craft Advisory in effect through 1 AM Sunday morning. Winds should begin to subside as the pressure gradient slackens and high pressure settles in. Small Craft Exercise Caution conditions are expected on Sunday as occasional gusts to near 15-20 knots cannot be ruled out. Otherwise, isolated to scattered showers may develop over the waters through mid week.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 59 78 67 83 / 0 30 10 30 HARLINGEN 56 79 63 84 / 0 10 10 30 MCALLEN 56 80 65 86 / 0 0 0 20 RIO GRANDE CITY 53 78 62 85 / 0 0 0 10 SOUTH PADRE ISLAND 62 77 72 81 / 0 40 30 40 BAYVIEW/PORT ISABEL 59 77 67 82 / 0 30 20 40

BRO WATCHES/WARNINGS/ADVISORIES

TX...Coastal Flood Advisory until 7 AM CDT Sunday for TXZ451-454-455.

High Rip Current Risk through Sunday morning for TXZ451-454-455.

High Surf Advisory until 7 AM CDT Sunday for TXZ451-454-455.

GM...Small Craft Advisory until 1 AM CDT Sunday for GMZ130-132-135- 150-155-170-175.