919
FXUS64 KEWX 282318
AFDEWX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
618 PM CDT Fri Jun 28 2024

...New AVIATION...

.SHORT TERM...
(Tonight through Saturday night)
Issued at 137 PM CDT Fri Jun 28 2024

A scattered deck of low cumulus remains across much of the area this
afternoon with an isolated shower or two trying to make it over
Lavaca, DeWitt, or Karnes County. Any precipitation would be short-
lived and light with chances ending late afternoon. The main focus
for today and tomorrow continues to be the heat with highs today in
the mid 90s to the around 103 degrees with afternoon dewpoints in
the 70s over the eastern half of the area. Forecast heat indices
remain to be at or above 108 degrees mainly along and east of the I-
35 corridor where a Heat Advisory continues through 7 PM this
evening. Low level moisture will allow for a more widespread cloud
deck to develop overnight into Saturday morning keeping low
temperatures a couple degrees warmer than those seen previous
nights. Saturday will be mostly similar to today with increased
dewpoints to the east which will bring back high heat indices.
Another Heat Advisory has been issued for Saturday afternoon in the
same locations as the one today, along and east of I-35. No rain
chances are seen tomorrow.

&&

.LONG TERM...
(Sunday through Friday)
Issued at 137 PM CDT Fri Jun 28 2024

The mid and upper level subtropical ridge axis remains the dominant
weather feature through the upcoming weekend and well into next week.
Temperatures will continue to remain above normal and we will likely
see additional heat headlines into early next week based on the
current forecast. Areas generally along and east of the I-35 corridor
continue to be favored for additional Heat Advisory products given
the the combination of hot temperatures and high humidity. Most areas
will also remain dry into early next week given the strong ridging
aloft. The exception will be near the coastal plains on Sunday when a
few showers and storms are expected along the sea breeze. Some of
this activity may get as far north as San Antonio, but we will keep
rain chances very low (20%) at this time.

As we head into the mid to late portion of the upcoming week, the
center of the subtropical high slowly pushes into the southeastern
U.S., with the medium range models showing mid and upper heights
building over the desert southwest. While mid and upper heights may
temporarily ease, there will be little change in the stout low-level
thermal ridge axis. With this in mind, suspect temperatures will
change little through the mid to late week period. Expect more above
normal temperatures along with the possibility of additional heat
headlines. The coastal plains could see some isolated showers and
storms develop along the sea breeze, with dry conditions elsewhere.

&&

.AVIATION...
(00Z TAFS)
Issued at 618 PM CDT Fri Jun 28 2024

VFR flying conditions start the forecast. MVFR CIGs develop overnight
at the I-35 sites, then early in the morning at KDRT. Clouds mix to
FEW VFR by midday at all sites. Breezy S-SE winds this evening become
more stable overnight, then become breezy again on Saturday.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              80  99  79  98 /   0   0   0  10
Austin Bergstrom Intl Airport  79  98  76  98 /   0  10   0  10
New Braunfels Muni Airport     79  98  78  98 /   0  10   0  10
Burnet Muni Airport            79  97  77  97 /   0   0   0   0
Del Rio Intl Airport           82 101  81 101 /   0   0   0  10
Georgetown Muni Airport        79  98  77  97 /   0   0   0   0
Hondo Muni Airport             79  99  77  97 /   0   0   0  20
San Marcos Muni Airport        78  98  75  96 /   0  10   0  10
La Grange - Fayette Regional   79  95  77  95 /   0  10   0  10
San Antonio Intl Airport       80  98  79  97 /   0   0   0  10
Stinson Muni Airport           80 100  79  98 /   0   0   0  20

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
Heat Advisory until 7 PM CDT this evening for Atascosa-Bastrop-
Bexar-Caldwell-Comal-De Witt-Fayette-Frio-Gonzales-Guadalupe-Hays-
Karnes-Lavaca-Lee-Travis-Williamson-Wilson.

Heat Advisory from 1 PM to 7 PM CDT Saturday for Atascosa-Bastrop-
Bexar-Caldwell-Comal-De Witt-Fayette-Frio-Gonzales-Guadalupe-Hays-
Karnes-Lavaca-Lee-Travis-Williamson-Wilson.

&&

$$

Short-Term...27
Long-Term...Platt
Aviation...04