Brownsville, Texas 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

683
FXUS64 KBRO 200534 AAA
AFDBRO

Area Forecast Discussion...UPDATED
National Weather Service Brownsville TX
1234 AM CDT Thu Aug 20 2026

...New AVIATION...

.KEY MESSAGES...
Updated at 1233 AM CDT Thu Aug 20 2026

 - Hot and rain-free conditions will continue through early next week.

 - Moderate (level 2 of 4) to major risk (3 of 4) of heat-related
   impacts through the period with peak afternoon heat indices
   generally between 105 to around 110 degrees.

 - The combination of low minimum relativity humidity values, dry
   fuels, and very hot temperatures could lead to the potential
   for rapid wildfire spread through the period.

&&

.DISCUSSION...
Issued at 1035 PM CDT Wed Aug 19 2026

A mid-level ridge anchored over the Four Corners region Friday
will gradually move southeastward over Texas this weekend into
early next week. This will continue to lead to strong subsidence
across Deep South Texas with very hot and rain-free conditions
through forecast period. Daily high temperatures are expected to
reach the upper 90s to around 105 degrees, except near the coast.
The combination of the very hot temperatures and elevated dewpoint
temperatures will support heat indices generally between 105 to
110 degrees each afternoon. Heat indices may briefly reach 111+ at
a few locations in the afternoon, but temperatures should remain
just below Heat Advisory criteria each day. Widespread Moderate
(Level 2 of 4) to Major (Level 3 of 4) Heat Risk expected through
late week into the weekend.

The combination of low minimum relativity humidity values, dry
fuels, and very hot temperatures could lead to the potential for
rapid wildfire spread through the period.

&&

.AVIATION...
(06Z TAFS)
Issued at 1233 AM CDT Thu Aug 20 2026

VFR will prevail at the aerodromes through the next 24 hours.

&&

.MARINE...
Issued at 1035 PM CDT Wed Aug 19 2026

A slightly enhanced pressure gradient over the western Gulf may
produce brief Small Craft Should Exercise Caution conditions on the
Laguna Madre at times Friday through the weekend. Otherwise, mariners
can expect moderate south to southeast winds and seas of 2 to 3 feet
through the period.

&&

.PRELIMINARY POINT TEMPS/POPS...
BROWNSVILLE             98  81  98  79 /   0   0   0   0
HARLINGEN              101  78 103  75 /   0   0   0   0
MCALLEN                103  81 104  79 /   0   0   0   0
RIO GRANDE CITY        104  79 105  76 /   0   0   0   0
SOUTH PADRE ISLAND      90  82  90  81 /   0   0   0   0
BAYVIEW/PORT ISABEL     97  80  98  78 /   0   0   0   0

&&

.BRO WATCHES/WARNINGS/ADVISORIES...None.

&&

$$