textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1030 PM CST Mon Dec 8 2025

- Sunny skies and gradually warmer temperatures are forecast through the remainder of the work week. High temperatures likely return to the low 80s by Wednesday.

- A cold front looks to arrive over the weekend, increasing rain chances to 20-30% Friday night through Sunday, and cooler temperatures possible Sunday.

DISCUSSION

Issued at 1030 PM CST Mon Dec 8 2025

Mostly sunny skies look to continue for the remainder of the work week. Winds will likely shift southerly Tuesday afternoon, allowing for a gradual warming trend through the remainder of the week. High temperatures will likely rise from the 70s on Tuesday into the 80s for the remainder of the week. Likewise, low temperatures are forecast to rise from the 40s tonight into the 60s by the weekend.

A weak cold front looks to approach the region Wednesday night, likely stalling as it moves through the CWA before rapidly retreating back to the north on Thursday. This front wont likely have much impact on rain chances or cloud cover, and the impacts on temperatures will likely be minimal. Locations to the north of the front may see high temperatures a couple degrees cooler than locations south of the boundary Thursday afternoon. These high temperatures will likely range from the upper 70s to low 80s.

A stronger front looks to move through the area over the weekend, bringing increased cloud cover and rain chances beginning Friday night and cooler temperatures early next week. Rain chances look to increase to around 20-30% Friday night through Sunday.

AVIATION

(06Z TAFS) Issued at 1030 PM CST Mon Dec 8 2025

Predominately VFR conditions are forecast to continue through the TAF period, thous some fog development is possible early Tuesday morning. Light and variable winds overnight will likely shift southeasterly by Tuesday afternoon, remaining light through the period. Skies are forecast to remain clear to mostly clear through the period. The combination of light winds and clear skies tonight will likely support efficient radiative cooling. This could present a low chance for fog development shortly before sunrise. However, most model guidance is keeping the dewpoint depression around 3-4 degrees, with visibility generally above 6 miles. Given the uncertainty, TAFs at BRO and MFE will remain VFR for the time being, with MVFR visibility at HRL shortly before sunrise.

MARINE

Issued at 1030 PM CST Mon Dec 8 2025

Generally favorable marine conditions are forecast to continue through the period. Light northerly winds will continue tonight before shifting to the southeast Tuesday afternoon. Light to moderate southeasterly winds will then likely continue into the weekend. Seas will continue to subside tonight, with 2-3 foot seas likely Tuesday. Slight seas look to then continue into the weekend.

Another cold front looks to move through the area over the weekend, likely bringing light to moderate northerly winds and moderate seas. Rain chances also look to increase to around 20-40% this weekend.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 67 50 74 58 / 0 0 0 0 HARLINGEN 67 45 74 52 / 0 0 0 0 MCALLEN 70 48 75 56 / 0 0 0 0 RIO GRANDE CITY 71 42 74 52 / 0 0 0 0 SOUTH PADRE ISLAND 65 60 69 64 / 0 0 0 0 BAYVIEW/PORT ISABEL 66 51 72 57 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

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