Severe Thunderstorm Warning 56, NWS Austin/San Antonio, TX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
124 PM CDT Thu Apr 30 2026

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

.KEY MESSAGES...

- Isolated to scattered thunderstorms are forecast for the rest of today
  into early Friday evening. Some could be strong to marginally
  severe.

- Locally heavy rain is forecast to affect some locations across
  South Central Texas through early Friday evening and a Flood
  Watch has been issued.

- Dry and cooler weather for the weekend with a warming trend
  forecast for the work week.

&&

.SHORT TERM...
(Tonight through Friday night)
Issued at 114 PM CDT Thu Apr 30 2026

Latest visible imagery shows cloudy skies across most of South
Central Texas with some breaks over the Coastal Plains. A mid to
upper level shortwave moving across the Hill Country is helping
shower and thunderstorm activity across the Hill Country especially
over portions of Burnet, Blanco, and soon over Travis counties as
of 1 PM CDT. This activity could be enhanced as the afternoon
progresses with more activity expanding over parts of the southern
Edwards Plateau. Main hazards are large hail, strong to damaging
wind gusts, and localized heavy rain. We may have a lull in
activity later this afternoon into the early evening, but showers
and thunderstorms return over the Rio Grande mid to late evening
and then move eastward overnight into Friday afternoon and
possibly through early Friday evening. These storms will have the
support of an upper level short wave pushing from Baja California
into northern Mexico into west Texas and then over our local area
throughout the day Friday. There is a moderate to high confidence
on locally heavy rain across a good portion of South Central Texas
late this evening through Friday evening as several rounds of
heavy rain affect the local area. A Flood Watch is in effect from
9 PM CDT this evening through 9 PM CDT Friday. Rainfall amounts of
2 to 4 inches are forecast with isolated 6 inches for the
duration of the Flood Watch. Remember to promote the following:
Stay weather aware and away from flooded areas. As the wave moves
to the east of the local area Friday afternoon through the
evening, rain chances come to an end from west to east. Breezy
north winds are forecast to prevail late Friday afternoon through
the overnight hours with gusts of 30 to 40 mph.

&&

.LONG TERM...
(Saturday through next Thursday)
Issued at 114 PM CDT Thu Apr 30 2026

By Saturday morning, dry and cooler weather conditions are in store
as a surge of cooler airmass pushes from the north resulting in lows
around the mid 40s over the Hill Country to mid 50s across the
Coastal Plains. Saturday's highs are forecast to range from the
upper 60s to mid 70s. A surface high pressure system over South
Central Texas Saturday evening pushes to the east overnight into
Sunday and brings back a southerly flow to the local area. With the
return flow in place, a warming trend begins on Sunday with forecast
highs in the mid to upper 70s to low 80s along the Rio Grande.
The warming trend and dry weather conditions continue at least
through next Wednesday.

&&

.AVIATION...
(18Z TAFS)
Issued at 1254 PM CDT Thu Apr 30 2026

With the exception of KAUS where thunderstorms could impact the
terminal within the next few hours, drier conditions are now
forecast for most of the day and took out the mention of
precipitation at all other sites through 00Z. The forecast becomes
a bit more messy heading into tonight through Friday as we expect
multiple rounds of showers and thunderstorms to impact terminals.
MVFR to IFR ceilings will likely linger over the northern half of
the area today while some scattering and lifting of ceilings will
be seen to the south. Any VFR conditions will be brief as
widespread IFR to LIFR conditions develop along with long duration
showers and periods of thunderstorms.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              60  63  53  74 /  90  90  20   0
Austin Bergstrom Intl Airport  61  64  51  73 /  90 100  20   0
New Braunfels Muni Airport     61  66  52  74 /  90 100  10   0
Burnet Muni Airport            56  60  50  71 /  90 100  20   0
Del Rio Intl Airport           65  73  54  74 /  90  90  10   0
Georgetown Muni Airport        59  61  50  72 /  90 100  20   0
Hondo Muni Airport             63  66  50  72 /  90  90  10   0
San Marcos Muni Airport        61  65  52  73 /  90 100  20   0
La Grange - Fayette Regional   63  67  53  73 /  90 100  30   0
San Antonio Intl Airport       63  66  52  73 /  90  90  10   0
Stinson Muni Airport           64  67  54  73 /  90  90  10   0

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
Flood Watch from 9 PM CDT this evening through Friday evening
for TXZ171>173-183>194-202>209-221-223.

&&

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

Special Weather Statement
National Weather Service Austin/San Antonio TX
1100 AM CDT Thu Apr 30 2026

TXZ171-301645-
Llano TX-
1100 AM CDT Thu Apr 30 2026

...A strong thunderstorm will impact portions of northern Llano
County through 1145 AM CDT...

At 1100 AM CDT, Doppler radar was tracking a strong thunderstorm over
Valley Spring, or 13 miles northwest of Llano, moving east at 30 mph.

HAZARD...Nickel size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

Locations impacted include...
Llano, Buchanan Lake Village, Baby Head, Lone Grove, Stolz, Bluffton,
Valley Spring, and Tow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3088 9846 3087 9843 3069 9842 3079 9895
      3092 9893 3092 9845
TIME...MOT...LOC 1600Z 278DEG 27KT 3087 9885

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...<30 MPH

27

Special Weather Statement
National Weather Service Austin/San Antonio TX
1209 PM CDT Thu Apr 30 2026

TXZ171-172-301800-
Llano TX-Burnet TX-
1209 PM CDT Thu Apr 30 2026

...A strong thunderstorm will impact portions of Llano and west
central Burnet Counties through 100 PM CDT...

At 1209 PM CDT, Doppler radar was tracking a strong thunderstorm over
Llano, moving east at 40 mph.

HAZARD...Penny size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

Locations impacted include...
Kingsland, Llano, Buchanan Dam, Gainesville, Buchanan Lake Village,
Castell, Field Creek, Inks Lake State Park, Lone Grove, Bluffton,
Valley Spring, Baby Head, Stolz, Longhorn Cavern State Park, Oxford,
Tow, and Prairie Mountain.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3095 9837 3064 9831 3055 9896 3092 9896
      3092 9845 3093 9844 3093 9842 3095 9842
TIME...MOT...LOC 1709Z 259DEG 34KT 3075 9871

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...<30 MPH

27

Special Weather Statement
National Weather Service Austin/San Antonio TX
1252 PM CDT Thu Apr 30 2026

TXZ172-173-192-301845-
Williamson TX-Burnet TX-Travis TX-
1252 PM CDT Thu Apr 30 2026

...A strong thunderstorm will impact portions of southwestern
Williamson, northwestern Travis and southwestern Burnet Counties
through 145 PM CDT...

At 1252 PM CDT, Doppler radar was tracking a strong thunderstorm near
Marble Falls, moving east at 25 mph.

HAZARD...Winds in excess of 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Austin, Cedar Park, Burnet, Marble Falls, Leander, Lakeway, Lago
Vista, Granite Shoals, Hudson Bend, Meadowlakes, Liberty Hill,
Oatmeal, Smithwick, Mansfield Dam, Spicewood, Jonestown, Briarcliff,
Cottonwood Shores, Volente, and Seward Junction.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3057 9835 3073 9831 3066 9780 3035 9789
TIME...MOT...LOC 1752Z 289DEG 23KT 3062 9826

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

62