111
FXUS64 KBRO 091725
AFDBRO

Area Forecast Discussion
National Weather Service Brownsville TX
1225 PM CDT Wed Jul 9 2025

...New DISCUSSION, AVIATION, MARINE...

.KEY MESSAGES...
Updated at 1222 PM CDT Wed Jul 9 2025

 - Unsettled weather returns for the weekend.

- Saharan dust will lead to hazy conditions Wednesday to Friday.

&&

.DISCUSSION...
Issued at 1222 PM CDT Wed Jul 9 2025

Rain chances will continue today (20-30%) becoming more scattered
this afternoon along the sea breeze, though most activity will
remain east of US-281. PWATs remain between 1.75 and 2 inches
across Deep South Texas, so any convection that develops could
lead to locally heavy rainfall along with gusty winds and cloud to
ground lightning.

There will be a brief drying out for Thursday and Friday, though sea
breeze convection is still possible but remains under a 15%
chance. As mentioned in the previous discussion, the forecast is
trending to wetter as we head into the weekend. Rain chances will
be greatest on Saturday with a 20-30% chance as broad low pressure
lingers across the western portion of the CWA into northeastern
Mexico. By Monday, high pressure builds back in with dry
conditions anticipated.

A plume of Saharan Dust is just southeast of the BRO CWA as of this
discussion and while we are seeing some haze now, conditions are
expected to become hazier later this afternoon and linger into
Thursday night.

Temperatures will remain warm through the period with highs in the
mid to upper 90s and heat indices between 100-110 degrees. Heat Risk
will remain Minor to Moderate across much of Deep South Texas and
the Rio Grande Valley into next week. If spending a prolonged period
of time outdoors, remember to practice heat safety to prevent heat-
related illnesses.

&&

.AVIATION...
(18Z TAFS)
Issued at 1222 PM CDT Wed Jul 9 2025

VFR conditions will prevail all all aerodromes through the TAF
period. Southeasterly winds will gust to around 25 kts through this
afternoon before becoming light this evening. There could be a few
isolated showers or thunderstorms through this afternoon that could
briefly lead to gusty winds, cloud to ground lightning, brief heavy
rainfall and briefly reduce visibilities.

&&

.MARINE...
Issued at 1222 PM CDT Wed Jul 9 2025

Generally favorable marine conditions are expected through much of
the week. Saharan dust has begun moving into the coastal waters by
which will lead to hazy conditions through Thursday night. By
Thursday afternoon, a slightly enhanced pressure gradient could lead
to Small Craft Caution as winds increase to 15-20 kts, especially on
the Laguna Madre, through the weekend.

&&

.PRELIMINARY POINT TEMPS/POPS...
BROWNSVILLE             78  91  78  92 /  10  10   0  10
HARLINGEN               75  93  76  94 /   0  10   0  10
MCALLEN                 77  95  78  95 /   0  10   0  10
RIO GRANDE CITY         75  95  76  96 /  10  10   0  10
SOUTH PADRE ISLAND      79  86  80  86 /  10  10  10  10
BAYVIEW/PORT ISABEL     77  90  78  90 /  10  10   0  10

&&

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

$$

DISCUSSION/MARINE/AVIATION...68