textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1111 AM CST Mon Dec 8 2025

- High temperatures in the 80s return by Wednesday along with abundant sunshine continuing through Thursday as ridging aloft persists, leading to a very low (less than 10%) chance of rain.

- Chances of rain increase Friday night to a low to medium (20-40%) chance by Saturday morning, followed by a low (15-20%) chance near the coast into Monday.

- A high risk of rip currents continues through this afternoon decreasing to a moderate risk tonight and a low risk by tomorrow morning.

DISCUSSION

Issued at 1111 AM CST Mon Dec 8 2025

Mainly quiet weather, plentiful sunshine and a very low (less than 10%) chance of rain is expected to continue for Deep South Texas through Thursday as ridging aloft persists. In wake of last night's cold front, northerly winds from a surface high pressure over the Southern Plains gradually become easterly tomorrow and southerly by Wednesday morning as the high slides eastward across the Deep South US. Moisture begins to build on Friday from southeasterly winds around a high over the Gulf as a cold front pushes through much of Texas. Although uncertainty still remains if the front will make it to our region Friday night, probabilities of precipitation (PoP's) are currently anticipated to rise from a low (15-20%) chance near the coast Friday night to a low to medium (20-40%) by Saturday morning, highest near the coast. PoP's decrease inland throughout Saturday, though coastal troughing may keep a low (15-20%) chance of rain near the Lower Texas coast into Monday.

Temperatures today and tonight are likely to be the coolest of the forecast period as highs remain in the mid to upper 60s to possibly near 70 degrees F for portions of the Rio Grande Valley, particularly further west. Lows tonight drop to the low to mid 40s inland, near 50 degrees F in Brownsville and low 60s near the coast. As winds veer to southeasterly to southerly by midweek, highs rise from the 70s tomorrow to mostly 80s from Wednesday onward, potentially peaking on Thursday. Overnight minimum temperatures rise from the 50s tomorrow night to mainly 60s by Wednesday night.

A high risk of rip currents continues through this afternoon, becoming a moderate risk overnight tonight and a low risk by tomorrow morning.

AVIATION

(18Z TAFS) Issued at 1111 AM CST Mon Dec 8 2025

Moderate, gusty at times, northerly winds of around 10-15 knots, gusting up to 20 knots, during the day today decrease to light and variable overnight tonight along with VFR conditions persisting through the 18 Z TAF cycle.

MARINE

Issued at 1111 AM CST Mon Dec 8 2025

Moderate to fresh northerly winds and moderate to rough (6-8 ft) seas today improve to mainly gentle northeasterly winds with gentle to moderate (2-3 ft) seas by tomorrow morning as the pressure gradient loosens across the Lower Texas coastal waters. Gentle to moderate southeasterly to southerly winds return by Wednesday morning, enhancing to moderate southeasterly winds with moderate (3- 4 ft) seas over the weekend. Chances of rain increase Friday night to a medium (40-50%) chance on Saturday, decreasing to a low (15- 30%) by Saturday night.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 67 50 74 57 / 0 0 0 0 HARLINGEN 67 45 74 52 / 0 0 0 0 MCALLEN 70 48 75 55 / 0 0 0 0 RIO GRANDE CITY 70 42 73 51 / 0 0 0 0 SOUTH PADRE ISLAND 65 60 70 64 / 0 0 0 0 BAYVIEW/PORT ISABEL 66 51 72 57 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

TX...High Rip Current Risk until 6 PM CST this evening for TXZ451-454- 455.

GM...Small Craft Advisory until 6 PM CST this evening for GMZ130-132- 135-150-155-170-175.