Brownsville, Texas 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

747
FXUS64 KBRO 100521 AAA
AFDBRO

Area Forecast Discussion...UPDATED
National Weather Service Brownsville TX
1221 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...
(06Z TAFS)
Issued at 1217 AM CDT Sun Aug 10 2025

VFR conditions are expected to generally prevail through the TAF
period, with sea breeze convection developing near or potentially
briefly disrupting BRO and HRL aerodromes between 17z and 19z.
Confidence and probabilities are too low to include in this
package at this time. Any convection is expected to work westward
into the afternoon with tall CB.

&&

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

&&

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

$$

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