textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Issued at 1135 AM CST Tue Nov 10 2026

- Rain is expected to overall decrease this evening into tomorrow but there is a low (20-30%) chance of some spotty showers.

- Temperatures will be cool today and tomorrow due to low clouds and northwesterly winds.

- Conditions should dry out for the middle and end of this week, but a weak cold front will increase rain chances (20-30%) for this upcoming Saturday and Sunday.

DISCUSSION

Issued at 1135 AM CST Tue Nov 10 2026

Conditions should continue to dry out through the afternoon into this evening as the heaviest convection moves offshore and high pressure from Northern Mexico moves toward the area, stabilizing the atmosphere. Due to lingering surface coastal troughing (which is expected to dissipate over the next couple of days), there could still be a shower or two tonight into tomorrow, especially near the coast. Chances remain low through, near 20 to 30%. By Thursday, Deep South Texas should be rain-free and remain so until Saturday.

A weak cold front is expected this weekend, which will bring low (20 to 30%) rain chances back to all of Deep South Texas for Saturday. These will continue overnight into Sunday. Lingering low rain chances will continue along the immediate coast for early next week as well.

Temperatures are expected to be unseasonably cool this afternoon and tomorrow. NBM guidance has trended warmer than actual observed temperatures over the region, with northwesterly flow and lingering cloud cover keeping observed temperatures cooler. Highs are expected to be in the upper 60s/lower 70s this afternoon. Depending on how quickly cloud cover dissipates and the strength of the northwesterly flow, highs could reach the upper 70s/low 80s tomorrow. However, if cloud cover lingers and northwesterly flow remains strong over Deep South Texas then tomorrow's highs could only reach the lower 70s instead. Temperatures are then expected to gradually warm to seasonal levels in the low 80s and remain in the low 80s/upper 70s through early next week.

AVIATION

(18Z TAFS) Issued at 1135 AM CST Tue Nov 10 2026

Low cloud ceilings with LIFR and IFR conditions are expected over the next several hours with light to moderate northwesterly winds. Conditions are expected to stay IFR for the majority of the TAF period as low cloud cover is expected to remain. Conditions may improve to MVFR tomorrow at MFE tomorrow morning.

MARINE

Issued at 1135 AM CST Tue Nov 10 2026

Overall favorable conditions are expected the rest of the week with low to moderate winds and seas. Conditions should deteriorate this weekend as another cold front approaches the area, increasing both the winds and the wave heights. Small Craft Exercise Caution and/or Small Craft Advisories may be needed.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 68 79 68 79 / 10 10 10 10 HARLINGEN 65 78 65 80 / 20 10 10 0 MCALLEN 67 80 68 81 / 20 10 10 0 RIO GRANDE CITY 63 79 64 81 / 10 10 10 0 SOUTH PADRE ISLAND 71 76 71 75 / 30 20 20 10 BAYVIEW/PORT ISABEL 66 78 66 77 / 20 20 20 0

BRO WATCHES/WARNINGS/ADVISORIES

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