229
FXUS64 KBRO 101102 AAB
AFDBRO

Area Forecast Discussion...UPDATED
National Weather Service Brownsville TX
602 AM CDT Sun Aug 10 2025

...New AVIATION...

.DISCUSSION...
Issued at 1006 PM CDT Sat Aug 9 2025

The forecast remains on track. Mid-level high pressure over the
Desert Southwest and across the southeastern US into the eastern
Gulf will continue into the middle of next week before the high
pressure over the eastern Gulf spreads into Texas. With troughing
currently over the western Gulf daily chances of precipitation (20-
30%) will continue, primarily along the sea breeze each afternoon
through Wednesday. This activity could bring brief heavy rainfall,
cloud to ground lightning and gusty winds. As the aforementioned
high pressure expands westward, subsidence will decrease precip
chances to under 15% Thursday through Saturday.

Near to slightly above normal temps will continue through the
forecast period. Heat indices of 105 to 110 degrees is expected each
day though a few locations, especially across the inland coastal
counties, may briefly have heat indices exceed 110 degrees. The
timeframe and coverage remains below Heat Advisory criteria but can
not rule out the possibility of a Heat Advisory being needed towards
the end of the week into the weekend. At the very least, SPSs will
likely be needed. Heat risk will remain Moderate (level 2 of 4) to
Major (level 3 of 4) every day.

&&

.AVIATION...
(12Z TAFS)
Issued at 559 AM CDT Sun Aug 10 2025

VFR conditions and southeasterly winds are expected to generally
prevail through the TAF period with isolated sea breeze
convection possible late morning into early afternoon from east to
west.

&&

.MARINE...
Issued at 1006 PM CDT Sat Aug 9 2025

Generally favorable marine conditions will prevail on the waters off
the lower Texas coast. Wave heights will remain at 1 to 2 feet with
4 to 6 second periods. Isolated showers and thunderstorms each day
could lead to localized areas of elevated winds and seas.

&&

.PRELIMINARY POINT TEMPS/POPS...
BROWNSVILLE             95  79  96  79 /  20  10  20  10
HARLINGEN               97  75  97  75 /  30  10  20   0
MCALLEN                101  79 102  79 /  20  10  20  10
RIO GRANDE CITY        102  78 102  78 /  10  10  20  10
SOUTH PADRE ISLAND      89  81  89  81 /  10   0  10   0
BAYVIEW/PORT ISABEL     92  77  93  78 /  20   0  10   0

&&

.BRO WATCHES/WARNINGS/ADVISORIES...
TX...None.
GM...None.
&&

$$

SHORT TERM...68-McGinnis
LONG TERM....68-McGinnis
AVIATION...56-Hallman