866
FXUS64 KBRO 131143 AAB
AFDBRO

Area Forecast Discussion...UPDATED
National Weather Service Brownsville TX
643 AM CDT Sat Sep 13 2025

...New AVIATION...

.DISCUSSION...
Issued at 938 PM CDT Fri Sep 12 2025

Isolated to scattered showers and thunderstorms are expected to be
the daily weather occurrence across Deep South Texas and the Rio
Grande Valley through the forecast period. This pattern will be
the result of a flow at the surface generally from the east, a
relatively moist atmosphere, daytime heating, the east to west
progression of the seabreeze boundary, and 500 mb high pressure
that will be nearby but not oppressive.

Temperature-wise, slightly above normal daytime highs and
overnight lows will be the rule, with no extreme values likely. A
Heat Advisory is not expected to be needed on any day, and heat
indices will not likely trigger the need for a Special Weather
Statement.

Finally, elevated seas will likely produce an extended period of a
Moderate Risk of rip currents at the local beaches.

&&

.AVIATION...
(12Z TAFS)
Issued at 640 AM CDT Sat Sep 13 2025

Some showers near the coast may impact HRL and BRO in the next
hour or two. Otherwise, there is a moderate chance of showers and
thunderstorms later this morning into the afternoon. VFR
conditions will continue for the next 24 hours, except for brief
periods of IFR/MVFR conditions in and around any convection.

&&

.MARINE...
Issued at 938 PM CDT Fri Sep 12 2025

Elongated surface high pressure over the northern Gulf of America
will be the dominant feature along the Lower Texas Coast through
the forecast period. Generally moderate winds and seas will occur,
with Small Craft Should Exercise Caution and Small Craft Advisory
not anticipated to be needed.

&&

.PRELIMINARY POINT TEMPS/POPS...
BROWNSVILLE             91  77  92  77 /  50  10  40  30
HARLINGEN               94  73  94  72 /  40   0  30  10
MCALLEN                 95  76  97  75 /  50  10  30  10
RIO GRANDE CITY         95  74  97  72 /  40  10  30  10
SOUTH PADRE ISLAND      88  82  88  81 /  40  10  30  50
BAYVIEW/PORT ISABEL     90  77  91  77 /  40  10  30  30

&&

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

$$

SHORT TERM...66-Tomaselli
LONG TERM....66-Tomaselli
AVIATION...63-KC