textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1242 AM CDT Mon Oct 19 2026

- Warming trend takes place Monday through Wednesday with temperatures returning to seasonable to slightly warmer than seasonable levels.

- Low grade (20-30%) rain chances along/near the immediate coastline Monday and Tuesday. Stronger and more widespread chances (20-60%) on Wednesday.

- Adverse coastal and marine conditions to continue this week with a moderate risk for rip currents and Small Craft Exercise Caution (SCEC) conditions.

DISCUSSION

Issued at 1028 PM CDT Sun Oct 18 2026

After a pleasant, Fall-like day with high temperatures mainly in the 70s, w warming trend will begin to take place on Monday. High temperatures on Monday will be slightly warmer than today and closer to seasonal norms with values in the low to mid 80s areawide. By Tuesday and Wednesday, temperatures will be seasonable to slightly warmer than seasonable levels across Deep South Texas and the Rio Grande Valley, with highs in the upper 80s to lower 90s. These temperatures are expected to continue through the remainder of the forecast period or through early next week.

Overall, the weather pattern will be tranquil with mainly rain-free days through next weekend. There will be low grade (20-30%) chances for showers on Monday and Tuesday along/near the immediate coast. Wednesday will present the best and more widespread opportunity for showers. Probability of rainfall increases to low-medium (20-60%) with medium chances (40-60%) being established east of IH-69C, and low chances (20-30%) west of IH-69C.

AVIATION

(06Z TAFS) Issued at 1242 AM CDT Mon Oct 19 2026

VFR is expected at the aerodromes through the next 24 hours, with generally light winds and mostly cloudy skies. A TEMPO has been inserted into a majority of the aerodromes, and is based on the HRRR model.

MARINE

Issued at 1028 PM CDT Sun Oct 18 2026

Adverse marine (SCEC) conditions will be in place over the Gulf Waters through much of next week, maybe with the exception of Thursday night through Friday night, where we could see moderate seas during that time. Otherwise, expect for day-to-day chances for showers over the Gulf Waters through Wednesday.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 84 73 87 74 / 20 10 30 20 HARLINGEN 85 70 88 70 / 20 20 30 10 MCALLEN 87 72 91 72 / 10 10 10 0 RIO GRANDE CITY 86 69 90 69 / 0 0 10 0 SOUTH PADRE ISLAND 81 77 83 77 / 40 20 30 30 BAYVIEW/PORT ISABEL 83 73 84 73 / 30 20 20 20

BRO WATCHES/WARNINGS/ADVISORIES

None.