Flash Flood Warning 18, NWS Austin/San Antonio, TX

245 
WGUS74 KEWX 252228
FFSEWX

Flash Flood Statement
National Weather Service Austin/San Antonio TX
528 PM CDT Mon May 25 2026

TXC031-260115-
/O.CON.KEWX.FF.W.0018.000000T0000Z-260526T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Blanco TX-
528 PM CDT Mon May 25 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM CDT THIS 
EVENING FOR WEST CENTRAL BLANCO COUNTY...

At 528 PM CDT, Doppler radar and automated rain gauges indicated 
thunderstorms producing heavy rain across the warned area. Between 2 
and 4 inches of rain have fallen. Additional rainfall amounts of 1 
to 2 inches are possible in the warned area. Flash flooding is 
ongoing or expected to begin shortly.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Radar and automated gauges.

IMPACT...Life threatening flash flooding of creeks and streams,
         urban areas, highways, streets and underpasses.

Some locations that will experience flash flooding include...
  Johnson City.

Flat Creek, Town Creek, and Tow Head Creek will see increased flow 
due to
significant rainfall upstream.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

Stay away or be swept away. River banks and culverts can become 
unstable and unsafe.

&&

LAT...LON 3016 9851 3028 9852 3033 9848 3030 9832
      3018 9839

FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

MM

968 
WGUS74 KEWX 260032
FFSEWX

Flash Flood Statement
National Weather Service Austin/San Antonio TX
732 PM CDT Mon May 25 2026

TXC031-260042-
/O.CAN.KEWX.FF.W.0018.000000T0000Z-260526T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Blanco TX-
732 PM CDT Mon May 25 2026

...FLASH FLOOD WARNING IS CANCELLED FOR WEST CENTRAL BLANCO COUNTY...

Flood waters have receded. The heavy rain has ended. Flooding is no 
longer expected to pose a threat. Please continue to heed remaining 
road closures.

&&

LAT...LON 3016 9851 3028 9852 3033 9848 3030 9832
      3018 9839

$$

MM

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
148 PM CDT Mon May 25 2026

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

.KEY MESSAGES...

-Pockets of heavy rain possible Hill Country this afternoon/early
 evening

- Active and unsettled weather pattern to return Tuesday afternoon
  through Wednesday with localized flooding issues possible.

- Warmer and drier weather looks possible by late week

- Rain chances return over the weekend

&&

.SHORT TERM...
(Tonight through Tuesday night)
Issued at 136 PM CDT Mon May 25 2026

A Meso Convective System (MCS) with embedded Meso Convective
Vortices (MCV) between the San Angelo's and Fort Worth/Dallas
CWAs is forecast to push to the south this afternoon. It could be
moving across the northern part of the Hill Country this evening.
As it does that, outflow boundaries are projected to push into the
Southern Edwards Plateau and Hill Country mid to late afternoon.
Moist southeasterly flow combines with these boundaries to
generate showers and storms across those areas through the period.
Some showers and storms could still be around the Hill Country
area including the Austin metro through early this evening. The
storm activity should be isolated to widely scattered in nature.
Strongest storms could produce wind gusts of 30 to 40 mph. In
addition, a quick 1 to 2 inches of rainfall could be possible as
wind shear values are weak, providing the storms to linger over a
location for a longer time. Otherwise, highs in the upper 80s
across most places and lower 90s along the Rio Grande Plains.
Overnight lows are forecast to range from the mid 60s to lower
70s.

By Tuesday morning, cloudy skies are expected across most of South
Central Texas. There is a slight chance for showers and an isolated
storm or two along the Rio Grande Plains and Southern Edwards
Plateau ahead of a dryline that sits over west Texas. By the
afternoon and continuing into the evening, an upper level short wave
axis pushes from northeast Mexico into the Southern Plains. At low
levels, a southerly wind flow remains and helps increased moisture
from the Gulf to be spread across South Central Texas. While that
happens, instability increases with forecast soundings suggesting
MLCAPE values of 2500+ J/kg, DCAPE 1000 J/kg, and wind shear values
exceeding 45 knots. All of this to say that, all severe weather
hazards are possible as a linear convective system develops ahead of
the west Texas dryline. The Day 2 Severe Weather Outlook from SPC
highlights the western half of South Central Texas (west of
Highway 281) with a Level 2 of 5 risk for severe thunderstorms and
the rest of the local area with Level 1 of 5 risk for severe
thunderstorms. The storm system is likely to affect the local area
Tuesday evening (the Rio Grande Plains first) through the
overnight hours into Wednesday morning (Coastal Plains). As the
storm system moves eastward Tuesday night and overnight, the
severe weather threat could diminish with the loss of daytime
heating, however, the heavy rain and flooding continues through
the period. Therefore, WPC ERO Day 2 highlights most of South
Central Texas with a Level 2 of 4 risk of excessive rainfall and
Day 3 with level 2 of 4 risk of excessive rainfall along and east
of Highway 77 as heavy rain moves over that area on Wednesday. As
of now, we are looking for a storm total rainfall values from 1 to
3 inches with up to 5 inches any where across the local area.

&&

.LONG TERM...
(Wednesday through next Monday)
Issued at 136 PM CDT Mon May 25 2026

The shower and storm activity pushes across the eastern part of
South Central Texas on Wednesday with dry conditions out west over
the Rio Grande Plains. The dry trend continues to push from west to
east with only slight chance for showers and storms across the east
on Thursday and a dry forecast for all local areas on Friday with
highs in the upper 80s to mid 90s. The upcoming weekend starts dry
but another upper level disturbance moving over northern Mexico into
the Southern Plains brings back rain chances.

&&

.AVIATION...
(18Z TAFS)
Issued at 1239 PM CDT Mon May 25 2026

Mainly VFR conditions to start the forecast though some pockets of
BKN clouds at 3kft could linger another hour. Did include a PROB30
group with thunderstorms expected to form near KAUS between 22-02Z,
though coverage should be very isolated. Besides in the presence of
any storms, wind will generally remain light from the east or
southeast. Continued only SCT low clouds in the forecast at this
time around when they formed this earlier this morning. There is a
low chance for storms around KDRT in the morning, and possibly some
chances for isolated storms near I-35 terminals Tuesday afternoon
but confidence is too low to include in the forecast at this time.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              70  89  72  83 /  20   0  80  80
Austin Bergstrom Intl Airport  70  89  72  83 /  20   0  80  80
New Braunfels Muni Airport     68  88  70  82 /  10  10  90  80
Burnet Muni Airport            67  85  69  81 /  20  10  70  70
Del Rio Intl Airport           72  88  70  89 /  10  30  70  10
Georgetown Muni Airport        69  87  70  81 /  20   0  70  70
Hondo Muni Airport             69  86  69  83 /   0  20  90  60
San Marcos Muni Airport        69  88  71  82 /  10  10  90  80
La Grange - Fayette Regional   70  89  72  81 /  10   0  70  90
San Antonio Intl Airport       70  88  71  83 /   0  10  90  70
Stinson Muni Airport           70  88  71  83 /   0  10  90  70

&&

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

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