281
FXUS64 KEWX 301902
AFDEWX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
202 PM CDT Sun Jun 30 2024

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

.SHORT TERM...
(Tonight through Monday night)
Issued at 158 PM CDT Sun Jun 30 2024

Radar trends show some isolated showers and storms over the Rio
Grande plains near Laredo, with a few light showers trying to
develop over the coastal plains. Hi-res models generally show the
two above mentioned areas will be favored for isolated convection,
so we will continue to mention a low chance (20%) for showers and
storms in these areas through the afternoon hours. Otherwise,
temperatures at 18Z (1 PM) are a little behind what we saw at the
same time yesterday. We still have some time to heat up and with
dewpoints staying fairly high, we will keep the current Heat
Advisory intact until 7 PM.

Another warm night is in store across south central Texas, with lows
ranging from the lower 70s in the Hill Country to the upper 70s/near
80 along the Rio Grande. On Monday, the above normal heat will
continue. Air temperatures are forecast to rise a bit compared to
today, with highs ranging from the mid 90s to near 102 degrees. We
do expect to see a little better mixing of low-level moisture and
this should keep peak heat index values just below the Heat Advisory
threshold (108 degrees) for counties generally along and east of the
I-35 corridor. However, the slightly drier air will likely allow air
temperatures to increase a degree or two. For now, we expect to see
daytime high temperatures just under the Heat Advisory threshold of
103 degrees. With this in mind, we will hold off on the issuance of
a Heat Advisory on Monday. We will also keep the forecast dry with
some subsidence noted on the northern edge of the area of low
pressure in the Bay of Campeche.

&&

.LONG TERM...
(Tuesday through Sunday)
Issued at 158 PM CDT Sun Jun 30 2024

By Tue AM the center of the 700-500MB ridge will be across the Lower
MS Valley.  The clockwise flow around the ridge will keep the S-SE
winds across our region and maintain the status quo on temps.  Will
be carrying no POP for the region through mid week although areas
across our Coastal Zones from Karnes, DeWitt, and Lavaca Counties
will stand at least a low chance for some seabreeze generated
convection in the afternoons.  As of right now...that chance is
below 20 percent and thus will not be mentioned but just be aware
that a popup SH/TS is always possible if the seabreeze gets active.
As we continue to dry out, we should start to see the Dew Point
temps also trend down.  The question is how much and will it be
enough to keep us below Heat Advisory levels. Will likely have to
play the Heat Advisory game day by day as usual but basically
because of the ridge centered to our east....we are not expecting
any oppressive heat through the extended forecast...just good ole
Texas July heat. Areas along and east of I-35 will be the areas to
look for the borderline Air temp/HI values for the Heat Advisories.

A digging trough across the northern U.S. on Thursday will set up a
cold front to push south into the Southern Plains of OK and N. TX.
While we are not expecting this front to make it into our
region...Portions of NW TX and areas to our N may get some rain
activity by the end of the week on Friday.  Models generated some
light POP over the far western zones near Val Verde County and kept
that in the forecast for Fri/Friday Night.  Some light pop has also
been added to the Coastal Plains late in the week into next weekend
as tropical moisture might be increasing in the Gulf from Beryl.
While its still to early to tell what Cat4 Beryl will be doing by
this time next week...models have been consistent in at least taking
into the Yucatan and then farther west into the southern Gulf.  The
messaging right now is to be aware...and keep watching the forecast
daily for changes/updates to Beryl`s track. We have many days to
watch his progress.

&&

.AVIATION...
(18Z TAFS)
Issued at 1232 PM CDT Sun Jun 30 2024

VFR conditions are in store through the remainder of this afternoon
and evening hours. Some convection is noted across the Rio Grande
plains. This activity is expected to remain isolated in coverage and
should mainly stay to the south of DRT. Otherwise, look for a little
less coverage of low clouds Monday morning as the low-level winds
for the I-35 sites weaken. However, we will keep prevailing MVFR cigs
in the forecast for SAT and SSF and have scaled back to a TEMPO
group for AUS. Low-level winds look a little more favorable for low
cloud development at DRT and have added a TEMPO group for MVFR
between 10-14Z.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              78 102  79 102 /   0   0   0   0
Austin Bergstrom Intl Airport  76 100  75 101 /   0   0   0   0
New Braunfels Muni Airport     77 100  75 101 /   0   0   0   0
Burnet Muni Airport            77 100  77 100 /   0   0   0   0
Del Rio Intl Airport           81 103  81 105 /  10   0   0   0
Georgetown Muni Airport        77 100  77 100 /   0   0   0   0
Hondo Muni Airport             75  99  74 100 /   0   0   0   0
San Marcos Muni Airport        76  99  74 100 /   0   0   0   0
La Grange - Fayette Regional   77  97  76  97 /   0   0   0   0
San Antonio Intl Airport       77 100  77 100 /   0   0   0   0
Stinson Muni Airport           77 101  76 102 /   0   0   0   0

&&

.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.

&&

$$

Short-Term...Platt
Long-Term...09
Aviation...Platt