textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 130 PM CDT Mon Apr 20 2026

Key Messages:

- Below normal temperatures continue today, around 20-25 degrees below normal for late April. Low to medium rain chances (20-40%) continue into tomorrow.

- A Coastal Flood Statement is in effect through 7 PM this evening and a High Risk for Rip Currents continues through Tuesday morning.

- Temperatures warm up through next weekend with highs ranging between the upper 80s (near the coast) to upper 90s (west) Wednesday through next Sunday.

DISCUSSION

Issued at 130 PM CDT Mon Apr 20 2026

Another unseasonably cool day is in store across Deep South Texas as the region remains beneath a blanket of stratus clouds with persistent northerly to northwesterly surface winds. Temperatures around 20-25 degrees below normal for late April, with most areas observing temperatures in the upper 50s to mid 60s this afternoon. Most precipitation has remained over the Gulf waters today, although light drizzle or rain cannot be ruled out this afternoon into tomorrow as low level warm, Gulf moisture overruns the cooler air mass at the surface. Rainfall amounts should remain fairly light. A warming trend begins on Tuesday as southerly to southeasterly flow returns across the region, with above normal temperatures returning by mid to late week and continuing through the weekend.

Along the lower Texas beaches, a high risk of rip currents will continue through at least tomorrow morning. A Coastal Flood Statement remains in effect through 7 PM this evening.

AVIATION

(18Z TAFS) Issued at 130 PM CDT Mon Apr 20 2026

Poor flying conditions are expected to continue through much of the forecast period at all TAF sites as stratus clouds blanket the region. Most sites are observing MVFR ceilings this afternoon, although brief periods of IFR ceilings may return through the afternoon hours. Most guidance indicates these trends to continue into the overnight hours, with improvement to MVFR expected once again by late tomorrow morning. Otherwise, expect light northwesterly winds to gradually shift to the east overnight and to the southeast by tomorrow morning with speeds generally below 10 knots.

MARINE

Issued at 130 PM CDT Mon Apr 20 2026

Marine conditions will continue to gradually improve through the first half of the week across the Gulf waters and Laguna Madre. Expect winds to gradually shift back to the southeast by this evening and persisting through the weekend. Otherwise, wave heights of 4-6 feet will continue through mid week before falling to 2-4 feet.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 70 80 71 86 / 40 30 10 10 HARLINGEN 67 81 68 88 / 40 30 10 10 MCALLEN 67 82 72 91 / 30 30 10 10 RIO GRANDE CITY 63 83 70 90 / 40 20 10 10 SOUTH PADRE ISLAND 71 77 73 79 / 40 30 10 10 BAYVIEW/PORT ISABEL 69 78 70 84 / 40 30 10 10

BRO WATCHES/WARNINGS/ADVISORIES

TX...High Rip Current Risk through Tuesday morning for TXZ451-454-455.

GM...None.