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 1242 AM CDT Tue Jun 30 2026
* Hot conditions continue through the week. Heat indices between 100 and 110 degrees this week will lead to Moderate (level 2 of 4) Heat Risk each day.
* Generally rain free conditions are expected, though could see some isolated sea breeze activity mid to late week.
* There is a Moderate Risk of life-threatning rip currents at area beaches through at least tonight.
DISCUSSION
Issued at 1045 PM CDT Mon Jun 29 2026
Hot, dry conditions continue through the forecast under broad mid- level ridging over eastern CONUS. Temperatures will remain seasonable for late June/early July, with highs in the upper 90s to low 100s (80s along the coast) and lows in the 70s. Heat indices from 100-110 degF each afternoon will maintain a moderate risk of heat related illness. Breezy south-southeasterly winds continue each afternoon through the rest of the week, with winds to 20 mph gusting to 25 mph.
Rain chances remain minimal through midweek, with dry air aloft and subsidence suppressing convective development. By Wednesday, the ridge slowly transiting east will increase support for sea breeze showers along the coast daily Wednesday through Friday (low chances, around 20%).
AVIATION
(06Z TAFS) Issued at 1242 AM CDT Tue Jun 30 2026
Predominately VFR conditions are forecast to continue through the TAF period, though brief MVFR ceilings will be possible at MFE overnight. Southeasterly winds are forecast to continue through the period, with wind gusts and speeds increasing during the afternoon.
MARINE
Issued at 1045 PM CDT Mon Jun 29 2026
Moderate southeasterly flow with briefly higher gusts will gradually diminish to moderate to gentle by Wednesday. Moderate seas decrease to slight. Favorable marine conditions are expected in the latter half of the period, with low (15% or less) rain chances persisting.
PRELIMINARY POINT TEMPS/POPS
BROWNSVILLE 94 80 94 80 / 0 0 0 0 HARLINGEN 95 76 95 76 / 0 0 0 0 MCALLEN 98 79 98 79 / 0 0 0 0 RIO GRANDE CITY 99 76 99 77 / 0 0 0 0 SOUTH PADRE ISLAND 87 81 87 80 / 0 0 10 0 BAYVIEW/PORT ISABEL 91 78 91 78 / 0 0 10 0
BRO WATCHES/WARNINGS/ADVISORIES
TX...None. GM...None.
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