textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 618 AM CDT Fri Mar 13 2026

Key Messages:

- A warming trend starts Friday through the weekend, with record highs possible on Sunday.

- A strong cold front is expected Sunday night into Monday, which will bring below-seasonal temperatures and fire, marine, and beach hazards to the region.

DISCUSSION

Issued at 1055 PM CDT Thu Mar 12 2026

Winds will likely shift back to the southeast Friday afternoon allowing temperatures to increase through the weekend. High temperatures will likely range in the low to mid 80s Friday afternoon increasing to the upper 80s to mid 90s Saturday and the mid 90s to around 100 on Sunday. Afternoon relative humidity values will likely remain below 30% across much of the CWA through Sunday, which may support increased fire weather concerns. However, wind speeds are forecast to

A strong cold front will likely move through the area Sunday night into Monday, likely bringing strong northerly winds, drier air, and cooler temperatures to start the work week. Additionally, there is a low (<20%) chance for some showers or thunderstorms along the front, primarily over the Gulf waters. Fire weather will likely be a concern Monday as relative humidity values are forecast to fall below 20% and strong winds will likely continue into the afternoon. High temperatures Monday look to fall into the mid 60s to low 70s, gradually increasing back to the 80s by mid week.

AVIATION

(12Z TAFS) Issued at 618 AM CDT Fri Mar 13 2026

VFR conditions are expected to persist through the TAF period at all TAF sites. Light southeasterly will continue through the TAF period as well. Some low-level clouds could move through the region, but the skies should be mostly clear.

MARINE

Issued at 1055 PM CDT Thu Mar 12 2026

Marine conditions are forecast to continue improving tonight with generally favorable conditions forecast through Sunday. A strong cold front will likely move through the are Sunday night into Monday, bringing strong northerly winds behind the front, and increased rain chances (20-40%) along the front. Small Craft Advisories or Gale Warnings may be needed Sunday night and Monday. Conditions will likely improve as light to moderate southeasterly winds and slight to moderate seas return through the remainder of the period.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 82 62 85 69 / 0 0 0 0 HARLINGEN 84 58 89 65 / 0 0 0 0 MCALLEN 88 63 93 69 / 0 0 0 0 RIO GRANDE CITY 87 59 95 65 / 0 0 0 0 SOUTH PADRE ISLAND 73 67 78 71 / 0 0 0 0 BAYVIEW/PORT ISABEL 79 62 85 68 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

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