textproduct: Brownsville/Rio Grande Valley
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
Updated at 1054 PM CDT Thu Apr 23 2026
Key Messages:
- Elevated heat risk expected for the next week with Monday through Wednesday being the highest concerns for heat risk.
- Very low chances for rain for the next seven days.
DISCUSSION
Issued at 1054 PM CDT Thu Apr 23 2026
Heat will continue to be the primary concern through the forecast, with high temperatures forecast to reach the upper 90s to low 100s this weekend through the middle of next week. Zonal flow aloft will likely be replaced with broad upper-level ridging over the weekend. This pattern will likely support generally rain free conditions and hot temperatures through the forecast. Heat indices are forecast to increase through the weekend, with the highest heat indices approaching 111 degrees Sunday, Monday and Tuesday.
Winds will likely remain out of the southeast through the period, with increased wind speeds and gusts each afternoon, especially along the coast.
AVIATION
(00Z TAFS) Issued at 628 PM CDT Thu Apr 23 2026
MVFR ceilings are forecast to develop tonight and continue into Friday morning before lifting to VFR levels by late Friday morning. Southeasterly winds are forecast to continue through the period, with wind gusts diminishing overnight and returning after sunrise Friday morning.
MARINE
Issued at 1054 PM CDT Thu Apr 23 2026
Generally favorable marine conditions are forecast to continue through the period. Light to moderate southeasterly winds are forecast to persist through the majority of the period, though some stronger winds along the coast during the afternoon hours early next week could result in brief Small Craft Should Exercise Caution headlines for the Laguna Madre. Slight to moderate seas are forecast to persist through the period.
PRELIMINARY POINT TEMPS/POPS
BROWNSVILLE 74 89 74 90 / 0 0 0 0 HARLINGEN 71 92 71 93 / 0 0 0 0 MCALLEN 75 96 76 97 / 0 0 0 0 RIO GRANDE CITY 73 97 74 98 / 0 0 0 0 SOUTH PADRE ISLAND 74 81 75 82 / 0 0 0 0 BAYVIEW/PORT ISABEL 72 88 72 88 / 0 0 0 0
BRO WATCHES/WARNINGS/ADVISORIES
TX...None. GM...None.
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