textproduct: Brownsville/Rio Grande Valley

DISCUSSION

Issued at 1204 PM CDT Sun Mar 22 2026

Mid-level high pressure over the Desert Southwest into western Texas will maintain well above normal temperatures (upper 80s to mid 90s) through the end of the workweek. Overnight lows will remain in the 60s. As we head into next weekend, a weak cold front will sag south into Deep South Texas with more seasonable temperatures expected. Generally dry conditions are expected this week with only a very slight chance of rain on Tuesday afternoon (10-15%) along the coast and into the mid Valley due to a weak mid-level disturbance in the western Gulf.

The potential for fire weather concerns will continue this week. A Rangeland Fire Danger Statement is in effect for much of Deep South Texas today. While winds will remain generally low, the ongoing drought with critical to extremely dry fuels could lead to rapid wildfire growth if ignited so the potential for statements may needed periodically through the remainder of the forecast period.

AVIATION

(18Z TAFS) Issued at 1204 PM CDT Sun Mar 22 2026

VFR conditions are expected through the TAF period. Southeasterly winds could gust up to around 30 kts this afternoon before decreasing this evening.

MARINE

Issued at 1204 PM CDT Sun Mar 22 2026

Generally favorable marine conditions are expected on the waters off the lower Texas coast with wave heights around 3 ft and 5 to 6 second periods. Caution conditions are possible each afternoon, mainly on the Laguna Madre, with a slightly enhanced afternoon pressure gradient. Isolated showers are possible on Tuesday, mainly across the nearshore waters and Laguna Madre, but chances remain low (10-15%).

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 64 86 66 87 / 0 0 0 20 HARLINGEN 61 88 62 89 / 0 0 0 10 MCALLEN 65 93 66 93 / 0 0 0 10 RIO GRANDE CITY 63 92 64 93 / 0 0 0 10 SOUTH PADRE ISLAND 69 78 69 78 / 0 0 0 10 BAYVIEW/PORT ISABEL 64 83 65 84 / 0 0 0 10

BRO WATCHES/WARNINGS/ADVISORIES

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