San Antonio, Texas 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

949
FXUS64 KEWX 131126
AFDEWX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
626 AM CDT Fri Jun 13 2025

...New AVIATION...

.SHORT TERM...
(Today through Saturday)
Issued at 229 AM CDT Fri Jun 13 2025

Key message:

- Isolated to scattered thunderstorms possible over the eastern half
  of South-Central Texas.

An upper level trough has moved into the Central Plains, and the
trough axis has moved east of our area resulting in northwesterly
flow over TX. Low level flow is light and generally from the east
across our CWA. The airmass is nearly saturated this morning with
temperatures and dewpoints in the 60s and 70s.

Northwesterly flow will continue today as an upper ridge pushes into
the region from the west. Warm, moist low level flow will also
continue today. This combination will result in another shot at
showers and thunderstorms, but coverage is expected to be isolated
to scattered at best and confined to the eastern half of the area.
The upper ridge will suppress any convection over the west.
Temperatures will be warmer with highs in the lower to middle 90s
for most areas outside of the Rio Grande Plains where highs will top
out in the 100-105 range. Increased moisture in the soil will add to
the humidity Friday, with feels like temperatures in the 103-111
range. Any convection today will end with the loss of heating
tonight. With the warmer day today, lows Saturday morning will be
warmer than today and back to near normal. The upper trough will
move farther away from TX Saturday, and the ridge will build a bit
more eastward. This will decrease rain chances more. Isolated
showers and thunderstorms will be possible over the I-35 Corridor
and Coastal Plains as the day heats up. High temperatures Saturday
will be about the same as Friday.

&&

.LONG TERM...
(Saturday night through Thursday)
Issued at 229 AM CDT Fri Jun 13 2025

Key messages:

- Chances of rain wane going into early next week, then increase
late week

- Seasonable temperatures with elevated humidities

Subtropical Ridging gradually builds over our area Sunday into early
to middle of next week. Heating and a weak seabreeze provide forcing
for showers and thunderstorms each day. Chances as far west as I-35
corridor Sunday and Monday become confined to the Coastal Plains on
Tuesday and Wednesday due to increasing subsidence under the Ridge.
Subtropical Ridge shifts north later in the week allowing for less
subsidence and increasing moisture. Forcing for showers and
thunderstorms increases with chances spreading to most of our area
Thursday into next Friday.

A lower level thermal ridge sets up with southerly flow prevailing
through the period. Moist soils from the recent rains keep mixing
with the drier air aloft less efficient resulting in temperatures
closer to average and afternoon heat index values elevated. The
warmest days will be Tuesday and Wednesday. Some spots near the
Coastal Plains and across the Winter Garden regions may briefly
flirt with Heat Advisory levels.

&&

.AVIATION...
(12Z TAFS)
Issued at 622 AM CDT Fri Jun 13 2025

The low clouds have underperformed this morning, but now seem to be
on the doorstep of the terminals. All of our airports will likely be
MVFR within the next hour or two until mid to late morning. There are
some hints of lower clouds, but lower ceilings don`t seem likely.
There is still a chance for isolated showers and thunderstorms this
afternoon, but not high enough chances to include in the TAFs. We
should see a repeat of low ceilings Friday night/Saturday morning.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              92  75  94  76 /  20  10  20   0
Austin Bergstrom Intl Airport  92  75  94  75 /  30  10  20   0
New Braunfels Muni Airport     91  75  92  75 /  30  10  20   0
Burnet Muni Airport            91  73  92  73 /  20   0  10   0
Del Rio Intl Airport           98  78 100  78 /   0   0   0   0
Georgetown Muni Airport        92  75  93  74 /  20   0  10   0
Hondo Muni Airport             91  75  93  74 /  30  10  20   0
San Marcos Muni Airport        91  75  93  74 /  30  10  20   0
La Grange - Fayette Regional   89  75  91  75 /  40  10  30   0
San Antonio Intl Airport       91  76  92  76 /  30  10  20   0
Stinson Muni Airport           92  77  94  77 /  30  10  20   0

&&

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

$$

Short-Term...05
Long-Term...04
Aviation...05