Mission, Texas Weather Forecast Discussion

603
FXUS64 KBRO 251734
AFDBRO
Area Forecast Discussion
National Weather Service Brownsville TX
1234 PM CDT Thu Sep 25 2025
...New DISCUSSION, AVIATION, MARINE...
.KEY MESSAGES...
Updated at 1206 PM CDT Thu Sep 25 2025
-Low rain chances will continue through much of he forecast
 period.
&&
.DISCUSSION...
Issued at 1206 PM CDT Thu Sep 25 2025
We are watching a cold front, whose leading edge is currently
located in the lower Valley, continue to linger through this
evening before finally moving south out of the area
overnight/early Friday morning. Along the front will be the main
focus for any showers and thunderstorms this afternoon/evening.
Due to the speed of the front moving through, rain chances have
decreased, especially across the mid to upper Valley and the
Ranchlands. CAMs still depict the development of isolated showers
and thunderstorms this afternoon, primarily in the mid to lower
Valley. While precipitation chances and totals have trended
downward we could still see isolated pockets of heavy rain leading
to nuisance flooding on roadways and low lying areas. Rain
chances will continue to decrease after sunset. If the front
pushes through earlier, rain chances will end earlier as well.
Overnight tonight, patchy fog may develop, especially across the
Ranchlands.
Friday, drier air moves in with generally rain free
conditions across much of the CWA through Saturday, though
portions of the lower Valley could still some isolated showers
through midday Friday.
On Sunday a weak coastal trough develops with rain chances
increasing slightly (15-20%), mainly right along the coast.
Headed into the work week, a shortwave moving over the region will
keep rain chances in the forecast, primarily along the seabreeze,
through the remainder of the forecast period.
Near normal temperatures will continue through the middle of next
week with highs in the low to mid 90s and overnight lows in the mid
60s to low 70s.
&&
.AVIATION...
(18Z TAFS)
Issued at 1206 PM CDT Thu Sep 25 2025
VFR conditions will prevail at all TAF locations through the
period. For the remainder of this afternoon into the evening, a
cold front over the Valley will allow for periods of MVFR
conditions and a chance for an isolated shower or thunderstorm
that could briefly lower visibilities further. Rain chances
decrease tonight as the front finally pushes through.
&&
.MARINE...
Issued at 1206 PM CDT Thu Sep 25 2025
Generally favorable conditions are expected with mostly light to
moderate winds and seas of 1 to 3 feet. Will continue to see
increased chances for showers and thunderstorms, especially on the
southern waters, through early Friday. Winds and seas may be
elevated near any showers or thunderstorms and waterspouts will
also be possible.
&&
.PRELIMINARY POINT TEMPS/POPS...
BROWNSVILLE             75  91  74  90 /  40  20  10  20
HARLINGEN               72  93  70  92 /  30  20   0  10
MCALLEN                 75  98  74  96 /  20  10   0  10
RIO GRANDE CITY         72  97  72  95 /  20  10   0  10
SOUTH PADRE ISLAND      79  87  80  87 /  40  20  10  10
BAYVIEW/PORT ISABEL     74  89  74  89 /  30  20  10  10
&&
.BRO WATCHES/WARNINGS/ADVISORIES...
TX...None.
GM...None.
&&
$$
DISCUSSION/MARINE/AVIATION...68

NWS BRO Office Area Forecast Discussion