Zapata, Texas Weather Forecast Discussion

552
FXUS64 KBRO 121720
AFDBRO
Area Forecast Discussion
National Weather Service Brownsville TX
1220 PM CDT Fri Sep 12 2025
...New DISCUSSION, AVIATION, MARINE...
.DISCUSSION...
Issued at 1213 PM CDT Fri Sep 12 2025
An unsettled weather pattern is expected to persist throughout the
next week, bringing daily rain chances to the Rio Grande Valley and
Deep South Texas.  Because a stalled frontal boundary is moving away
from the area, lower precipitation chances are expected throughout
the weekend, with a 30-40% chance for almost all of Deep South Texas
tomorrow, and a 20-30% chance on Sunday. A coastal trough is
expected to set up off the Mexican Gulf coast by early next week,
which will support continued unsettled weather. This, combined with
the abundance of moisture, daytime heating along with sea breeze
interactions will continue to support isolated to scattered shower
and thunderstorm development into next week.  Starting Monday,
precipitation chances increase to around 40-50% for areas closer to
the coast and around 20-30% for areas east of US 281/I-69C.  This is
expected to continue through at least next Friday.
Temperatures are expected to get up into the low to mid 90s for all
of Deep South Texas, and because there is going to be some higher
humidities with all of the moisture, there will be slightly elevated
heat indices.  Heat Risk is expected to be mostly Minor (Level 1 of
4), with some small pockets of Moderate (Level 2 of 4) sprinkled in.
Low temperatures are expected to be typical for this time of year,
getting down into the low to mid 70s.
Moderate rip currents are expected throughout the week, as a
persistent easterly wind should create a stronger ocean fetch,
resulting in stronger surf closer to the shore. Most rip current
deaths occur along the Lower Texas Coast during moderate risks, so
area swimmers will need to remain situationally aware and exercise
caution.
&&
.AVIATION...
(18Z TAFS)
Issued at 1213 PM CDT Fri Sep 12 2025
VFR conditions expected at all airports eith light to moderate
easterly winds which could become gusty at times. Isolated showers
are expected in the area through at least 0z, and could
temporarily deteriorate conditons at local airports
&&
.MARINE...
Issued at 1213 PM CDT Fri Sep 12 2025
Light to moderate easterly winds and low wave heights (2 to 4 feet)
are expected throughout the weekend into next week.  This will
result in overall favorable marine conditions. However, isolated to
scattered showers and thunderstorms are expected to form over the
Gulf waters throughout the week.  Some of these could have locally
gusty winds up to 30-40 mph, which could temporarily deteriorate
marine conditons in their direct vicinity.
&&
.PRELIMINARY POINT TEMPS/POPS...
BROWNSVILLE             91  77  92  77 /  50  50  40  20
HARLINGEN               93  74  94  72 /  50  20  30  10
MCALLEN                 96  77  96  75 /  50  20  40  10
RIO GRANDE CITY         95  75  95  73 /  50  20  40   0
SOUTH PADRE ISLAND      88  82  88  82 /  60  50  40  30
BAYVIEW/PORT ISABEL     90  77  90  77 /  50  40  40  20
&&
.BRO WATCHES/WARNINGS/ADVISORIES...
TX...None.
GM...None.
&&
$$
SHORT TERM...55-MM
LONG TERM....55-MM
AVIATION...55-MM

NWS BRO Office Area Forecast Discussion