Brownsville, Texas 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

723
FXUS64 KBRO 091137 AAB
AFDBRO

Area Forecast Discussion...UPDATED
National Weather Service Brownsville TX
637 AM CDT Wed Jul 9 2025

...New AVIATION...

.DISCUSSION...
Issued at 945 PM CDT Tue Jul 8 2025

The forecast continues to trend a bit wetter, at least through
the weekend. An inverted mid-level trough of low pressure will
retrograde west from the western Gulf of America into northeast
Mexico, where it will then linger and transition into a broad 500
mb low. Combined with precipitable water (PWAT) values that will
hover around two inches and daytime heating, the result will be
the risk for isolated to scattered showers and thunderstorms for
Wednesday through Sunday, with the least chance of rain occurring
Thursday, and the greatest chance of precipitation projected for
Saturday. After the weekend, with the dissipation of the 500 mb
low, mid-level high pressure building-in from the east, and PWAT
values decreasing to around 1.5 inches, dry weather will return.

Temperature-wise, no real extreme values are anticipated, with
near normal highs inching-up to slightly above normal levels at
the start of the new work week as the mid-level high increases its
influence on Deep South Texas and the Rio Grande Valley.

&&

.AVIATION...
(12Z TAFS)
Issued at 623 AM CDT Wed Jul 9 2025

Mostly clear skies and light southeast winds prevail across Deep
South Texas early this morning. Will mention a TEMPO at MFE for
some patchy low/IFR clouds until 13Z. Otherwise, VFR conditions
are expected for the next 24 hours. However, there is a low chance
of convection for today which may produce brief periods of MVFR
conditions at times. Light winds this morning will become breezy
later this morning into the afternoon, becoming light late this
evening.

&&

.MARINE...
Issued at 945 PM CDT Tue Jul 8 2025

Surface high pressure positioned over the central to northeast
Gulf of Mexico, and extended along the Lower Texas Coast, will
interact with varying intensity with thermal low pressure over
inland Mexico. This will produce generally moderate winds and
seas for the lower Texas coastal waters. Although Small Craft
Advisory is not likely to be needed, Small Craft Should Exercise
Caution cannot be entirely ruled out due to winds, especially over
the Laguna Madre and Gulf of America waters from 0 to 20 nautical
miles offshore.

&&

.PRELIMINARY POINT TEMPS/POPS...
BROWNSVILLE             93  78  91  78 /  10  10  10   0
HARLINGEN               94  75  93  76 /  20   0  10   0
MCALLEN                 96  77  95  78 /  20   0  10   0
RIO GRANDE CITY         96  75  95  76 /  10  10  10   0
SOUTH PADRE ISLAND      87  79  86  80 /  10  10  10  10
BAYVIEW/PORT ISABEL     91  77  90  78 /  20  10  10   0

&&

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

$$

SHORT TERM...66-Tomaselli
LONG TERM....66-Tomaselli
AVIATION...63-KC