Viboras, Texas Weather Forecast Discussion

059
FXUS64 KBRO 181730
AFDBRO
Area Forecast Discussion
National Weather Service Brownsville TX
1230 PM CDT Thu Sep 18 2025
...New DISCUSSION, AVIATION, MARINE...
.KEY MESSAGES...
Updated at 1209 PM CDT Thu Sep 18 2025
- Rain and thunderstorm chances continue into next week.
&&
.DISCUSSION...
Issued at 1209 PM CDT Thu Sep 18 2025
An unsettled weather pattern continues across Deep South Texas as
tropical moisture, a series of disturbances overhead, and daytime
heating leads to scattered showers and thunderstorms persisting
into next week. Best time frame for precipitation will primarily
coincide with the peak heating of the day and along the sea
breeze. Highest chances of any precipitation will be along and
east US 281/I-69C though will continue to see showers and
thunderstorms migrate westward into the Rio Grande Plains through
the evening. Some of this activity, especially in the afternoons,
could be heavy with gusty winds, cloud to ground lighting, and
heavy rainfall. Instantaneous rainfall rates of 3 to 4 inches per
hour are possible and could lead to some nuisance flooding,
primarily on roadways and low lying areas. Portions of western
Cameron and eastern Hidalgo counties will be more susceptible to
this as they experienced heavy rainfall yesterday.
Near to just below normal temperatures are expected over the next
few days, primarily due to the increased rain chances and cloud
cover. Heat indices will stay below 105 degrees with a Minor
(level 1 out of 4) Heat Risk. Monday and Tuesday temperatures will
increase to just slightly above normal. Heat indices increase to
105 to 110 degrees, with a Moderate (level 2 our of 4) Heat Risk.
A moderate risk of rip currents is expected at area beaches over
through at least Friday afternoon.
&&
.AVIATION...
(18Z TAFS)
Issued at 1209 PM CDT Thu Sep 18 2025
VFR conditions will prevail over the airports through the TAF
period. We continue to have the chance of showers and
thunderstorms though confidence is low on these directly impacting
the aerodromes, thus kept VCSH/VCTS in the TAF package. If any of
this activity does impact the airports, brief gusty winds, heavy
rainfall, and lowered visibilities will be possible.
&&
.MARINE...
Issued at 1209 PM CDT Thu Sep 18 2025
Generally favorable conditions with mostly light to moderate winds
and seas of 2 to 3 feet. Rain and thunderstorm chances will continue
on the waters off the lower Texas coast. Any shower or thunderstorm
activity will lead to localized increased winds and seas.
&&
.PRELIMINARY POINT TEMPS/POPS...
BROWNSVILLE             76  90  76  92 /  40  50  30  60
HARLINGEN               72  92  71  94 /  20  40  10  50
MCALLEN                 76  95  76  96 /  30  40  10  40
RIO GRANDE CITY         73  96  72  96 /  20  40  10  30
SOUTH PADRE ISLAND      81  87  81  87 /  40  40  40  50
BAYVIEW/PORT ISABEL     76  89  75  90 /  30  40  20  50
&&
.BRO WATCHES/WARNINGS/ADVISORIES...
TX...None.
GM...None.
&&
$$
DISCUSSION/MARINE/AVIATION...68

NWS BRO Office Area Forecast Discussion