489
FXUS64 KEWX 171035
AFDEWX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
535 AM CDT Mon Aug 17 2026

...New AVIATION...

.KEY MESSAGES...
Updated at 534 AM CDT Mon Aug 17 2026

- A dry and rain free weather regime continues this new work week
  into this weekend. Practice heat safety and stay cool and
  hydrated.

&&

.SHORT TERM...
(Today through Tuesday)
Issued at 1202 AM CDT Mon Aug 17 2026

Dry and hot conditions persist for the short term forecast period.
Overnight lows are forecast to range from the low to mid 70s. Can`t
rule out a few spots getting down to the upper 60s. Clouds begin to
develop overnight through the mid Monday morning time frame.
Humidity levels are likely to stay elevated over parts to the east
of the Interstate 35 and Coastal Plains. Therefore, expect patchy to
areas of fog to develop over portions of these locations by day-
break and dissipating mid morning. Mostly sunny to sunny skies are
then forecast for the afternoon period as mixing takes place.
Monday`s highs are going to be similar to those of Sunday, ranging
from the upper 90s across most of the Hill Country and 100 to 103
for the rest of South Central Texas. When looking at pwat values and
dewpoint temperatures for this afternoon (50s and 60s) for most
places, it looks to be the driest day for this week. With that said,
it is going to be hot, however, a more comfortable heat versus
having dewpoints in the upper 60s to low 70s. Heat index values stay
at or slightly higher than the ambient temperatures with highest
values across the Coastal Plains and southern Rio Grande
Plains ranging from 103 to 107.

The pattern repeats with clouds developing late evening and then
lasting through Tuesday morning. Mostly sunny to sunny skies follow
and daytime highs reaching the upper 90s and up to 103 across most
of South Central Texas. Can`t rule out higher temperatures over few
spots across the southern Rio Grande Plains. Since both temperatures
and heat index values stay on check, no heat product headlines
needed. However, stay cool and hydrated.

&&

.LONG TERM...
(Tuesday night through Sunday)
Issued at 1202 AM CDT Mon Aug 17 2026

A dry and hot weather pattern persists through the rest of the work
week into the weekend as the region remains under the influence of
sub-tropical ridging. The ridging reposition a bit towards late week
into the weekend, with the center axis becoming established across
the southwest CONUS. Nonetheless, the hot and rain-free forecast
continues across South Central Texas with the daytime highs running
a bit higher than climate normal values.

&&

.AVIATION...
(12Z TAFS)
Issued at 534 AM CDT Mon Aug 17 2026

MVFR ceilings have developed over portions of the Hill Country,
Coastal Plains and I-35 corridor including at KSAT/KSSF. There is
higher confidence KAUS will remain VFR this morning, therefore have
taken any mention of BKN ceilings out of the TAF this update. Low
clouds dissipate mid-morning, then mostly clear skies and VFR
conditions are expected the rest of the day across South Central
Texas. Southerly wind will be under 10 knots most of the period,
though some occasional gusts up to 20 knots cannot be ruled out in
the afternoon, particularly in the west near KDRT.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry             103  77 102  79 /   0   0   0   0
Austin Bergstrom Intl Airport 102  76 101  78 /   0   0   0   0
New Braunfels Muni Airport    101  75 101  76 /   0   0   0   0
Burnet Muni Airport           101  74 100  76 /   0   0   0   0
Del Rio Intl Airport          101  78 100  77 /   0   0   0   0
Georgetown Muni Airport       101  77 100  79 /   0   0   0   0
Hondo Muni Airport            100  74 100  75 /   0   0   0   0
San Marcos Muni Airport       101  75 100  76 /   0   0   0   0
La Grange - Fayette Regional  101  76 100  77 /   0   0   0   0
San Antonio Intl Airport      100  77 100  77 /   0   0   0   0
Stinson Muni Airport          102  77 101  77 /   0   0   0   0

&&

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

$$

SHORT TERM...17
LONG TERM....17
AVIATION...27