textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 1214 PM CDT Thu Mar 19 2026

Key Messages:

* Warm and dry weather continues into late next week.

* Wildfire threat remains elevated across Deep South Texas.

DISCUSSION

Issued at 1214 PM CDT Thu Mar 19 2026

High pressure dominates Deep South Texas into late next week, with temperatures once again warming above normal and no chance of rain. Breezy southeasterly winds each afternoon may help maintain relative humidity values above any fire weather criteria along and east of US281/I69C. Relative humidity values to the west across the brush country will drop below 20-30 percent each afternoon, but do so without the breeze, until the evening, when moisture is recovering, potentially limiting additional fire weather concerns at this time.

The entire region remains primed for wildfires and burn bans are in effect across all of Deep South Texas, except Kenedy County. CPC is leaning toward above normal rainfall occurring during the final week of March at 40-50 percent probability.

AVIATION

(18Z TAFS) Issued at 1214 PM CDT Thu Mar 19 2026

VFR conditions are expected to prevail through the TAF period, with a southeasterly wind.

MARINE

Issued at 1214 PM CDT Thu Mar 19 2026

Southeasterly winds persist through the forecast period with generally favorable marine conditions. Afternoon breezes across the bay may occasionally kick up a moderate chop or brief Small Craft Caution gusts.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 61 85 64 87 / 0 0 0 0 HARLINGEN 57 90 60 92 / 0 0 0 0 MCALLEN 61 93 65 95 / 0 0 0 0 RIO GRANDE CITY 58 92 60 95 / 0 0 0 0 SOUTH PADRE ISLAND 66 77 68 78 / 0 0 0 0 BAYVIEW/PORT ISABEL 60 84 63 86 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

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