619
FXUS64 KBRO 210336
AFDBRO

Area Forecast Discussion
National Weather Service Brownsville TX
1036 PM CDT Sun Sep 20 2026

...New DISCUSSION, MARINE...

.KEY MESSAGES...
Updated at 1009 PM CDT Sun Sep 20 2026

 - Sustained daily opportunity for rainfall, especially Wednesday
   and Thursday.

 - Continued hot temperatures, but no extremes.

 - Elevated risk of rip currents at the local beaches.

&&

.DISCUSSION...
Issued at 1009 PM CDT Sun Sep 20 2026

Broad 500 mb high pressure will remain the dominant weather
feature over Deep South Texas and the Rio Grande Valley through
the forecast period. However, the center of the high, positioned
generally over east Texas, will produce a more easterly and moist
flow off of the neighboring Gulf of America, with precipitable
water values hovering near 2 inches. This will have the result of
enhancing the daily seabreeze boundary, with isolated to scattered
showers and thunderstorms across the BRO CWFA. At this time, the
best chances for precipitation are Wednesday and Thursday, with
the best combination of moisture and easterly flow.

Temperature-wise, above normal to well above normal values will
occur, despite the autumnal equinox officially kicking-off on
Tuesday 22 September at 7:04 PM CDT.

Finally, winds and seas along the Lower Texas Coast will produce a
low to moderate risk of rip currents at the local beaches through
the period.

&&

.AVIATION...
(00Z TAFS)
Issued at 551 PM CDT Sun Sep 20 2026

VFR will prevail at the aerodromes through the next 24 hours, with
light to moderate winds with breezy gusts and clear to partly
cloudy skies. Convection is possible, but will be too isolated to
warrant a mention in the current issuance of TAFs.

&&

.MARINE...
Issued at 1009 PM CDT Sun Sep 20 2026

High pressure over the western Gulf of America will produce light
to moderate winds and low to moderate seas along the Lower Texas
Coast through the next several days. Small Craft Should Exercise
Caution and Small Craft Advisory are not likely to be needed.

&&

.PRELIMINARY POINT TEMPS/POPS...
BROWNSVILLE             80  97  80  95 /   0  20   0  40
HARLINGEN               76  99  75  98 /   0  10   0  40
MCALLEN                 80 103  79 100 /   0  20   0  60
RIO GRANDE CITY         78 102  77 100 /   0  10  10  40
SOUTH PADRE ISLAND      82  89  82  89 /   0  10  10  30
BAYVIEW/PORT ISABEL     79  95  79  94 /   0  10  10  30

&&

.BRO WATCHES/WARNINGS/ADVISORIES...None.

&&

$$

SHORT & LONG TERM...Tomaselli-66
UPPER AIR....Marcelloni-55