textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1219 AM CDT Thu Mar 19 2026

Key Messages:

* Warm and dry weather continues into next week.

* Wildfire threat remains elevated across Deep South Texas.

DISCUSSION

Issued at 1048 PM CDT Wed Mar 18 2026

An upper-level ridge over the Southwestern US looks to remain in place into next week, resulting in hat and dry conditions through the forecast. Southerly to southeasterly winds are forecast to continue through the period, with gusts likely each afternoon. Afternoon relative humidity values will likely range from 20-30%, with lower values possible across western portions of the CWA. Fire weather conditions will likely remain a concern through early next week, due to the low relative humidity values. However, 20ft wind speeds are forecast to remain below 15 mph, which will likely limit the potential for elevated fire weather conditions.

High temperatures are forecast to remain in the 80s Thursday, before climbing into the 90s Friday and remaining in the 90s through the remainder of the forecast.

AVIATION

(06Z TAFS) Issued at 1219 AM CDT Thu Mar 19 2026

VFR TAFs are expected to persist through the period at all TAF sites. With light southeasterly winds continuing through the period, there is a possibility that some low-level clouds could move through the region, but skies should be mostly clear for the period.

MARINE

Issued at 1048 PM CDT Wed Mar 18 2026

Generally favorable marine conditions are expected to continue through the period. Light to moderate southeasterly winds and slight seas are forecast to continue into next week, courtesy of persistent high pressure over the central Gulf. Wind speeds along the Laguna Madre may increase 15-20 knots Saturday and Sunday afternoons in response to tightening pressure gradients along the Lower Texas Coast, possibly requiring brief Small Craft Should Exercise Caution headlines.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 83 61 85 64 / 0 0 0 0 HARLINGEN 85 57 89 60 / 0 0 0 0 MCALLEN 88 62 92 64 / 0 0 0 0 RIO GRANDE CITY 88 57 91 60 / 0 0 0 0 SOUTH PADRE ISLAND 74 67 76 68 / 0 0 0 0 BAYVIEW/PORT ISABEL 80 60 83 63 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

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