234
FXUS64 KEWX 181832
AFDEWX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
132 PM CDT Tue Aug 18 2026

...New SHORT TERM, LONG TERM...

.KEY MESSAGES...
Updated at 131 PM CDT Tue Aug 18 2026

- Yes to the heat. No to rain chances. Pattern persists for many
  days. Stay safe and hydrated.

&&

.SHORT TERM...
(Tonight through Wednesday night)
Issued at 131 PM CDT Tue Aug 18 2026

Hot, hot, hot. That`s the story and it won`t be changing much
through late August. In the short term, Subtropical ridging is still
in control over the southern and southwestern CONUS. This is
expected to keep hot and dry weather in place for South Central
Texas in the short term. Highs will easily climb into the upper 90s
to around 103 today, with borderline Heat Advisory level temps along
the I-35 corridor and east into the Coastal Plains. Opted to lower
dewpoints and blend with CONSall as the NBM operational has
continued to run a couple of degrees too high since the start of
this more Summer-like pattern. This acts to mix things out a bit
more in the afternoons which is typical once we`ve had a couple
weeks straight of hot and dry weather.

&&

.LONG TERM...
(Thursday through next Tuesday)
Issued at 131 PM CDT Tue Aug 18 2026

The Subtropical ridge will actually start to strengthen a bit and
move further east and center over Texas by Friday and into the
weekend. Heat Advisories will likely be needed either starting
Thursday or Friday as ambient air temperatures will be hot enough to
reach criteria, particularly in the Austin metro where highs between
102-105 are possible Thursday-Sunday. There isn`t much more to note
here other than continued hot weather expected to last through at
least late August per the long range guidance from the ECMWF Ens and
GEFS. Continue to practice heat safety and find ways to keep cool.

&&

.AVIATION...
(18Z TAFS)
Issued at 1228 PM CDT Tue Aug 18 2026

VFR conditions are expected through the period across all forecast
terminals. Southerly winds today will eventually turn light
overnight before picking back up from the south generally around
or under 10 knots. KSAT and KSSF could see slightly higher winds
briefly this evening before they too become light and southerly
late evening and overnight. Could have a cloud deck develop late
overnight but all TAF sites should remain in the lower VFR range
and out of MVFR conditions if this occurs.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              79 103  77 104 /   0   0   0   0
Austin Bergstrom Intl Airport  77 102  77 102 /   0   0   0   0
New Braunfels Muni Airport     76 102  75 102 /   0   0   0   0
Burnet Muni Airport            76 101  75 101 /   0   0   0   0
Del Rio Intl Airport           76 102  78 102 /   0   0   0   0
Georgetown Muni Airport        78 102  77 102 /   0   0   0   0
Hondo Muni Airport             75 101  74 102 /   0   0   0   0
San Marcos Muni Airport        76 102  75 102 /   0   0   0   0
La Grange - Fayette Regional   77 102  76 102 /   0   0   0   0
San Antonio Intl Airport       77 101  77 101 /   0   0   0   0
Stinson Muni Airport           77 103  76 103 /   0   0   0   0

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

SHORT TERM...MMM
LONG TERM....MMM
AVIATION...CJM