textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1107 AM CST Tue Nov 4 2025

* Rain-free and tranquil weather conditions are expected to persist through next week.

* Upper 80s to mid 90s return mid week through next weekend before temperatures cool back down to seasonable levels early next week following another cool fropa.

DISCUSSION

Issued at 1107 AM CST Tue Nov 4 2025

While the high temperatures for today are expected to be slightly above normal, the trend will see the high temperatures continue to climb through most of the forecast period into the weekend. With mid- level ridging being the dominant influence for weather. As such, the forecast has for Deep South Texas and the Rio Grande Valley continues to be rain-free as well. The mid-level ridge will also bring dry air from aloft that will allow for mostly clear skies each night, and thus radiational cooling will allow for low temperatures to be close to seasonal each night. The surface winds for the rest of the work week are expected to be out of the east to southeast.

During the weekend, another cold front is expected to move through the region and bring high temperatures back to closer to seasonal values. Currently, model are not very favorable for any rain associated with this front at the current time. This does not mean that a rogue shower or two could not occur. While more dry air is expected to move into the region behind the front and minimum relative humidity values for Saturday and Sunday in Zapata, Starr, Jim Hogg, and Brooks counties into the range of 20 to 30 percent. The minimum relative humidity values for Monday are even lower for those area dropping into the range of teens to 20s. However the current forecast for the 20-foot winds does remain light which would limit the fire weather concerns at this time.

AVIATION

(18Z TAFS) Issued at 1107 AM CST Tue Nov 4 2025

VFR conditions are expected to persist through the TAF cycle at all TAF sites. Mostly light southeasterly to easterly winds are expected, but a few gusts could occur from time to time.

MARINE

Issued at 1107 AM CST Tue Nov 4 2025

Favorable marine conditons are expected through the first half of the weekend with light to moderate onshore flow and low to moderate seas. A cold front is expected to move through the Lower Texas coast by Sunday. While the chances for rain are low (less than 30%), northerly winds behind the front are expected to be elevated and could result in a mix of adverse and hazardous conditions. As such, periods of Small Craft Exercise Caution and Small Craft Advisory are possible for the later half of the weekend and part of early next week.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 64 85 64 86 / 0 0 0 0 HARLINGEN 58 87 59 89 / 0 0 0 0 MCALLEN 62 90 62 90 / 0 0 0 0 RIO GRANDE CITY 58 89 59 91 / 0 0 0 0 SOUTH PADRE ISLAND 71 80 72 81 / 0 0 0 0 BAYVIEW/PORT ISABEL 63 83 64 84 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

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