San Antonio, Texas 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

968
FXUS64 KEWX 112329
AFDEWX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
629 PM CDT Sat Apr 11 2026

...New AVIATION...

.KEY MESSAGES...

- A line of storms is forecast to move from the southern Edwards
  Plateau into the Hill Country tonight, with heavy downpours and
  isolated severe weather possible.

- The line of thunderstorms will move across the I-35 Corridor and
  into the Coastal Plains early Sunday.

- The potential for strong to severe storms and locally heavy
  rainfall continues through the weekend into early next week.

&&

.SHORT TERM...
(Tonight through Sunday night)
Issued at 121 PM CDT Sat Apr 11 2026

An upper level low off the west coast anchors a deep trough along
the coast with southwesterly flow across northern Mexico into TX.
The low level flow is from the southeast across our CWA. The
airmass over South-Central Texas remains warm and moist.
Temperatures are in the 70s and dewpoints in the middle to upper
60s. A shortwave trough is moving through the pattern across
northern Mexico toward TX. This shortwave will provide lift to
generate thunderstorms later this afternoon and evening. Forecast
soundings show modest CAPE and shear which should be sufficient
for strong to severe thunderstorms into the evening over our
Southern Edwards Plateau region. Hi-res models suggest a line of
thunderstorms moving from West TX into our CWA tonight which could
bring severe storms overnight. Steep lapse rates suggest large
hail as the main threat with damaging winds also likely. There is
a lower threat for tornadoes. The line of storms will progress
across the Hill Country and I-35 Corridor Sunday morning and early
afternoon. At the same time the upper low will move onto the west
coast sending another shortwave trough across TX. Convection
Sunday afternoon and evening will be dependent on how much
cloudiness restricts heating. Regardless of when storms form
models show sufficient instability and shear to generate strong to
severe storms. Again hail and winds are the main threats with
tornadoes also possible.

With the high dewpoints and moist air aloft, PW values will be
well above normal through the period. Thunderstorms will produce
locally heavy rain that could lead to flash flooding. The flooding
threat will follow the storms from west to east. For tonight the
main threat area will be the Southern Edwards Plateau into the
western Hill Country. It will move into the eastern Hill Country
and I-35 Corridor Sunday morning.

&&

.LONG TERM...
(Monday through next Saturday)
Issued at 121 PM CDT Sat Apr 11 2026

The upper trough will move slowly across the western states Monday
through Wednesday. This will keep TX in southwesterly flow aloft.
Low level flow will continue from the southeast keeping a warm,
moist airmass in place. This will mean continuing chances for
showers and thunderstorms each day into the middle of next week.
Timing will likely be afternoon and early evening. Without much
change in the pattern, strong storms with locally heavy rainfall
are looking possible each day. The movement of the upper trough
may keep the worst weather farther north, but it`s too soon to get
specific on details. Best to be prepared for multiple days of
significant weather.

&&

.AVIATION...
(00Z TAFS)
Issued at 616 PM CDT Sat Apr 11 2026

VFR flight conditions begin the TAF period with some hit or miss
rain showers in the area. Confidence for a shower to reach or
impact the I-35 terminals (KAUS, KSAT, and KSSF) will be too low
to include a mention through the first half of the night.
Attention then turns to the Southern Edwards Plateau overnight
where a line of convection will take shape and slowly advance
eastward. Added TEMPO group for DRT from 07Z to 11Z for -TSRA and
and PROB30s with TSRA or -TSRA from 13Z to 17Z at the I-35
terminals (KAUS, KSAT, and KSSF). Variable, gusty winds and
additional lowering of flight categories will be possible in and
around any rain and storms. Ceilings in general lower overnight
into Sunday morning as well with mainly MVFR to IFR conditions.
Rain could persist after Sunday morning but expect for the return
of VFR flight conditions into and through the latter half of
Sunday afternoon. Outside of convective influences, expect for
winds to remain mostly of moderate to gusty speeds from the east
to southeast.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              68  79  69  86 /  60  70  40  20
Austin Bergstrom Intl Airport  68  78  69  85 /  50  70  40  20
New Braunfels Muni Airport     68  79  68  86 /  50  60  50  20
Burnet Muni Airport            66  77  67  83 /  70  80  30  20
Del Rio Intl Airport           68  85  69  87 /  90  40  20  20
Georgetown Muni Airport        68  77  68  83 /  60  70  30  20
Hondo Muni Airport             66  80  67  85 /  60  80  40  20
San Marcos Muni Airport        68  79  69  85 /  50  60  50  20
La Grange - Fayette Regional   69  80  69  86 /  30  60  50  20
San Antonio Intl Airport       68  79  69  85 /  60  70  50  20
Stinson Muni Airport           71  80  70  86 /  50  60  40  20

&&

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

$$

SHORT TERM...05
LONG TERM....05
AVIATION...62