textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1107 AM CST Tue Jan 20 2026

- Above normal temperatures continue into Friday.

- Rain chances into Wednesday and again over the weekend.

- Cold front this weekend to bring freezing temperatures and hazardous marine conditions.

DISCUSSION

Issued at 1107 AM CST Tue Jan 20 2026

A mid/upper level shortwave moving east into the southern US has brought low to medium chances rain to the region through Wednesday (20-50%) before drying out again Wednesday night. Temperatures will remain above normal through Friday.

The main story for this forecast cycle will be a strong cold front pushing through Deep South Texas on Saturday bringing much colder air. High temperatures for the day on Saturday will be a little closer to seasonal norms before plunging into the 30s overnight with feels like temps in the teens and 20s. These overnight temperatures will need to be watched closely as this front will bring with a low chance (20-30%) of precipitation with it on Saturday night. If the precipitation or any wet surfaces coincide with below freezing temps we could see some light freezing rain/icing in spots (mainly elevated surfaces) in the northern Ranchlands (<10% chance). Will continue to closely monitor the potential for any wintry precipitation. Sunday into Monday will be much cooler with highs only reaching the 40s and 50s with overnight lows in the 30s. Feels like temps will be in the 20s and 30s. The overnight cold temperatures will likely warrant the need for Freeze Watches/Warnings and Cold Weather Advisories Saturday night through Monday night. Now is the time to prepare for freezing temperatures this weekend. Make sure to protect pipes, pets, plants, and people.

AVIATION

(18Z TAFS) Issued at 1107 AM CST Tue Jan 20 2026

VFR conditions will prevail through the TAF period. Light to moderate southeasterly winds will continue through this afternoon, decreasing overnight. Spotty rain showers will be possible throughout today, with low confidence on any activity reaching the airports. On Wednesday, however, rain chances increase that could lead to brief lowered ceilings.

MARINE

Issued at 1107 AM CST Tue Jan 20 2026

Generally favorable marine conditions will prevail through Friday with rain chances continuing through Thursday. This weekend a strong cold front will move through the waters off the lower Texas coast with Small Craft Advisories needed Saturday and Sunday in wake of the frontal passage. Rain chances will also return Saturday through Monday.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 74 63 75 62 / 20 20 50 20 HARLINGEN 73 58 76 57 / 20 20 40 10 MCALLEN 74 61 77 61 / 20 30 40 10 RIO GRANDE CITY 72 59 77 58 / 20 30 30 10 SOUTH PADRE ISLAND 70 65 71 64 / 20 20 60 30 BAYVIEW/PORT ISABEL 74 61 73 60 / 20 20 50 20

BRO WATCHES/WARNINGS/ADVISORIES

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