Severe Thunderstorm Warning 94, NWS Austin/San Antonio, TX

722 
WWUS54 KEWX 140430
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
1130 PM CDT Wed May 13 2020

TXC137-465-140445-
/O.CON.KEWX.SV.W.0094.000000T0000Z-200514T0445Z/
Edwards TX-Val Verde TX-
1130 PM CDT Wed May 13 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT
FOR WEST CENTRAL EDWARDS AND EASTERN VAL VERDE COUNTIES...

At 1127 PM CDT, a severe thunderstorm was located near Loma Alta, 
moving east at 25 mph. Latest radar images show the storm weakening, 
however, these storms have been pulsing all night and we are 
continuing the warning through 1145 pm.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Loma Alta and Vinegarone. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 2986 10082 2997 10083 3008 10046 2981 10044
TIME...MOT...LOC 0427Z 266DEG 23KT 2994 10071 

HAIL...1.00IN
WIND...60MPH
 
$$

288 
WWUS54 KEWX 140444
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
1144 PM CDT Wed May 13 2020

TXC137-465-140454-
/O.EXP.KEWX.SV.W.0094.000000T0000Z-200514T0445Z/
Edwards TX-Val Verde TX-
1144 PM CDT Wed May 13 2020

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL EDWARDS AND
EASTERN VAL VERDE COUNTIES WILL EXPIRE AT 1145 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

LAT...LON 2986 10082 2997 10083 3008 10046 2981 10044
TIME...MOT...LOC 0444Z 266DEG 23KT 2995 10061 

$$

Area Forecast Discussion...UPDATED
National Weather Service Austin/San Antonio TX
1027 PM CDT Wed May 13 2020

.UPDATE...
The Severe Thunderstorm Watch for Val Verde County issued early
through 10 PM this evening was allowed to expire. There is strong to
severe thunderstorm moving across north central Val Verde County as
of this writing and we issued a Severe Thunderstorm Warning for it
through 11 PM. The storm is entering to an area where conditions are
less favorable to keep current status. Therefore, we think the storm
should begin to weaken within the next several volume scans.

Also with this update, removed the slight chances for showers and
thunderstorms over parts of south central Texas and kept showers
mentioned over two-thirds of the area in case some light shower
activity develops overnight as an upper level short wave moves over
the area. Still showing isolated thunderstorms over parts of the
western part of the Hill Country overnight where the better lift may
be present.

&&

.PREV DISCUSSION... /ISSUED 648 PM CDT Wed May 13 2020/

AVIATION...
VFR conditions are expected across the I-35 corridor through about
midnight tonight. A cluster of strong storms could be impacting KDRT
around 01Z through 04Z as these storms move out of northeast Mexico
and enter the western portion of Val Verde County. There is a split
decision between HiRes solutions bringing the storms over KDRT.
Since the HRRR is performing well with the ongoing convection, we
will follow its projected path of these storms with storms
affecting KDRT around 01Z-04Z (as already mentioned above).
Cigs/vsbys could lower a category or two depending on the intensity
over the storm if it does go over the terminal. Storms are likely to
dissipate around midnight tonight. Otherwise, MVFR cigs are
anticipated to begin around 05Z/06Z for the I-35 sites through
17Z/18Z Thursday. Can't rule out an hour or two with IFR before dawn.
MVFR cigs are expected after 05Z for KDRT and last through 18Z.
Winds are forecast to be out of the southeast and south 7 to 10 knots
with gusts up to 17 knots.

PREV DISCUSSION... /ISSUED 332 PM CDT Wed May 13 2020/

UPDATE...
Updated to add Severe Thunderstorm Watch 180 for Val Verde county
until 10 PM CDT.

PREV DISCUSSION... /ISSUED 228 PM CDT Wed May 13 2020/

SHORT TERM (Tonight through Thursday Night)...
Low stratus deck has struggled to scatter and lift this morning. SSE
wind have begun to pick up this afternoon which will encourage
boundary layer mixing and promote additional clearing. Scattered
streamer showers are depicted by several high res models over the
coastal plains and areas east of I-35 for this afternoon. Low-end
POPs in for this activity till 21Z.

Attention will then turn to west TX and the Big Bend region where
storms are expected to initiate along the dryline. Convective
initiation should be around 21Z when a shortwave makes it's way over
the state. Convective allowing models diverge on how this evening
activity is handled. General consensus is that shortly after sunset,
storms begin a downward trend and reach our far western counties as
they dissipate. Some outliers, like the ARW, carry this line of
potentially strong to severe storms a bit further into the interior
Hill Country and our central counties. One outlier, the 06Z and 12Z
3km NAM dissipates storms over the Rio Grande but carries a line of
storms into the northeastern Hill Country and over the Austin metro
all the way from northwest TX that developed along the dryline in
the late afternoon. Again this is an outlier but run to run
consistency has gained some attention. There will be a pretty strong
cap in place over our eastern counties this evening and overnight so
there is confidence that if any storms do make it as far as the I-35
corridor, it would be fairly weak. SPC does have our western 1/3
under a slight risk and a marginal risk stretching to the I-35
corridor. Main threats being large hail and damaging winds.

Overnight Wednesday, temperatures will remain warm, only dropping to
the low 70s for much of the region. Dewpoints will remain elevated
in the upper 60s to low 70s, so a warm and muggy night is in store.
Some fog development could take place for the interior Hill Country
with the absence of any rainfall but would remain confined to rural
areas of the Hill Country.

On Thursday, shower activity should be confined mostly along the
coast and over the Gulf as this latest disturbance continues
eastward. Kept low-end POPs in for our southeastern counties for
this. Slight warm up for Thursday with afternoon highs a couple of
degrees above what they were Wednesday and a brief break from rain
chances Thursday night.

LONG TERM (Friday through Wednesday)...
Models continue to be consistent with an upper level trough moving
across Texas for the end of the week. This will be a trigger for
showers and thunderstorms starting Friday and continuing through
Sunday. In the low levels warm, moist flow from the Gulf will prime
the atmosphere for a potential heavy rain event. PW values will
increase to 1.5 to 2.0 inches which is sufficient for heavy rain at
this time of year. At this time, the best chance for heavy rain looks
to be across the eastern half of our CWA. Rainfall totals from Friday
through Sunday morning will be generally two to four inches with
isolated amounts to six inches possible. Exact locations are hard to
determine at this time. This amount of rain will likely lead to
localized flooding and our confidence is growing that a Flash Flood
Watch will be needed for this time period. The upper system will move
slowly away from the region during the first part of next week and
low chances for showers will linger over the area Monday through
Wednesday.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              71  86  71  86  68 /  10  20  -   50  60
Austin Bergstrom Intl Airport  71  86  70  86  67 /  10  20  -   50  60
New Braunfels Muni Airport     71  87  70  86  68 /  20  20  -   40  60
Burnet Muni Airport            70  85  69  84  66 /  20  10   0  40  60
Del Rio Intl Airport           71  93  74  90  68 /  30   0  -   40  70
Georgetown Muni Airport        70  86  70  86  67 /  10  10  -   40  60
Hondo Muni Airport             71  90  71  90  67 /  20  10   0  40  70
San Marcos Muni Airport        71  86  70  86  67 /  20  20  -   40  60
La Grange - Fayette Regional   72  86  72  86  69 /  20  30  10  40  50
San Antonio Intl Airport       71  88  72  87  69 /  20  20   0  50  70
Stinson Muni Airport           72  89  73  88  70 /  20  20   0  50  70

&&

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

Short-Term/Aviation...17
Long-Term...04

Hazardous Weather Outlook
National Weather Service Austin/San Antonio TX
415 AM CDT Wed May 13 2020

TXZ171>173-183>194-202>209-217>225-228-141000-
Llano-Burnet-Williamson-Val Verde-Edwards-Real-Kerr-Bandera-
Gillespie-Kendall-Blanco-Hays-Travis-Bastrop-Lee-Kinney-Uvalde-
Medina-Bexar-Comal-Guadalupe-Caldwell-Fayette-Maverick-Zavala-
Frio-Atascosa-Wilson-Karnes-Gonzales-De Witt-Lavaca-Dimmit-
415 AM CDT Wed May 13 2020

This Hazardous Weather Outlook is for South-Central Texas..

.DAY ONE...Today And Tonight.

Isolated severe storms are possible late this afternoon and
evening along the Rio Grande and southern Edwards Plateau. Large
hail and damaging straight-line winds are the primary threats.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Locally heavy rainfall is possible Friday night through Saturday
across South Central Texas. Between 2 and 4 inches of rainfall is
currently forecast, with isolated amounts of 6 inches. Dangerous
flash flood impacts and river flooding could occur. Further
details on timing, locations, and rainfall amounts will be refined
through the week.

.SPOTTER INFORMATION STATEMENT...

Spotter are encouraged to submit storm reports and rainfall
amounts to the National Weather Service.

Special Weather Statement
National Weather Service Austin/San Antonio TX
853 PM CDT Wed May 13 2020

TXZ183-140245-
Val Verde TX-
853 PM CDT Wed May 13 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN VAL VERDE COUNTY
UNTIL 945 PM CDT...

At 853 PM CDT, Doppler radar was tracking a strong thunderstorm 10
miles northwest of Pandale, moving east at 25 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations impacted include...
Pandale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
south central Texas.

LAT...LON 3028 10176 3029 10161 3028 10136 3009 10140
      3018 10176
TIME...MOT...LOC 0153Z 271DEG 23KT 3027 10172

CP

Special Weather Statement
National Weather Service Austin/San Antonio TX
937 PM CDT Wed May 13 2020

TXZ183-140315-
Val Verde TX-
937 PM CDT Wed May 13 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN VAL VERDE COUNTY
UNTIL 1015 PM CDT...

At 937 PM CDT, Doppler radar was tracking a strong thunderstorm 10
miles southeast of Pandale, or 18 miles north of Langtry, moving east
at 25 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Juno and Bakers Crossing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
south central Texas.

LAT...LON 3001 10155 3012 10153 3020 10103 2973 10114
TIME...MOT...LOC 0237Z 282DEG 22KT 3006 10147

CP

Special Weather Statement
National Weather Service Austin/San Antonio TX
1054 PM CDT Wed May 13 2020

TXZ183-184-140500-
Val Verde TX-Edwards TX-
1054 PM CDT Wed May 13 2020

...SIGNIFICANT WEATHER ADVISORY FOR EDWARDS AND NORTHEASTERN VAL
VERDE COUNTIES UNTIL MIDNIGHT CDT...

At 1054 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 22 miles northwest of Rocksprings to 22 miles
south of Sonora to 10 miles west of Loma Alta. Movement was east at
35 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Rocksprings, Loma Alta, Carta Valley, Vinegarone, Devils River State
Nat Area Del Norte, Us-277 Near The Sutton-
Edwards County Line, Kickapoo Cavern State Park and Devil's Sinkhole
State Natural Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3029 10089 3029 10004 2963 10029 2962 10048
      2984 10109
TIME...MOT...LOC 0354Z 266DEG 30KT 3022 10050 3025 10072 2993 10096

CP