textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 557 PM CDT Sat Mar 28 2026

Key Messages:

* Unseasonably warm, dry, and at times breezy conditions will persist through next week.

* Generally favorable marine conditions will continue through Monday before becoming slightly more adverse Monday night through next weekend.

DISCUSSION

Issued at 1224 PM CDT Sat Mar 28 2026

Unseasonably warm, mostly rain-free, and at times breezy conditions will prevail through next week across Deep South Texas and the Rio Grande Valley. Mid-upper ridging/higher geopotential heights will continue to influence our weather pattern through the forecast period across Deep South Texas and the Rio Grande Valley. On the western flank of a Bermuda high, south-southeasterly winds will return next week. Winds could become breezy at times as the sfc pressure gradient tightens nearby.

The combination of clouds and cool air advection (CAA) following the passage of a cool front will keep high temperatures today in the low to mid 80s most places; upper 70s west. A warming trend begins on Sunday with highs returning into the mid 80s to lower 90s. Next workweek, daytime high temperatures will range between the upper 80s/lower 90s near the coast to the mid-upper 90s along and west of IH-69C each day. Overnight low temperatures will mainly be in the 60s through the forecast period. However, there could be some nights (Tuesday night through Friday night) with lows in the 70s mainly along the Rio Grande Valley.

AVIATION

(00Z TAFS) Issued at 557 PM CDT Sat Mar 28 2026

Gentle to moderate east-northeasterly to north-northeasterly winds this evening settle down to light east-northeasterly or calm by the pre-dawn hours across all terminals. There is a medium to likely chance of MVFR ceilings developing over KHRL and KMFE late tonight, with the greatest chances at KMFE, continuing through sunrise Sunday morning. MVFR ceilings are possible at KBRO as well. VFR conditions return by Sunday afternoon as southeasterly winds pick up to around 10-15 knots, gusting to near 20 knots, or higher.

MARINE

Issued at 1224 PM CDT Sat Mar 28 2026

Generally favorable marine conditions will continue through Monday with low to moderate winds and seas. Monday night through next weekend, marine conditions could become slightly more adverse as breezy south-southeasterly winds could drive up slightly higher wave heights. Small Craft Exercise Caution (SCEC) conditions are likely Tuesday through next Saturday as a result.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 65 84 67 85 / 20 20 0 0 HARLINGEN 61 86 63 89 / 10 20 0 0 MCALLEN 66 89 68 92 / 20 20 0 0 RIO GRANDE CITY 62 90 66 92 / 20 0 0 0 SOUTH PADRE ISLAND 69 77 71 78 / 10 20 0 10 BAYVIEW/PORT ISABEL 65 82 66 85 / 10 20 0 0

BRO WATCHES/WARNINGS/ADVISORIES

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