Severe Thunderstorm Warning 42, NWS Austin/San Antonio, TX

117 
WWUS54 KEWX 180659
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
159 AM CDT Thu Apr 18 2019

TXC163-180709-
/O.CAN.KEWX.SV.W.0042.000000T0000Z-190418T0730Z/
Frio TX-
159 AM CDT Thu Apr 18 2019

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN FRIO COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
south central Texas.

LAT...LON 2864 9834 2864 9879 2890 9880 2910 9839
      2879 9810 2862 9832 2862 9834
TIME...MOT...LOC 0659Z 252DEG 39KT 2873 9868 

$$

TXC013-180730-
/O.CON.KEWX.SV.W.0042.000000T0000Z-190418T0730Z/
Atascosa TX-
159 AM CDT Thu Apr 18 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR ATASCOSA COUNTY...

At 159 AM CDT, a severe thunderstorm was located 9 miles south of
Charlotte, moving east at 45 mph.

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

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Pleasanton, Jourdanton, Charlotte, Christine, Campbellton, Leming,
Fashing, Davis, Coughran, Peggy, Dobrowolski, McCoy, Hindes and
Graytown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2864 9834 2864 9879 2890 9880 2910 9839
      2879 9810 2862 9832 2862 9834
TIME...MOT...LOC 0659Z 252DEG 39KT 2873 9868 

HAIL...0.88IN
WIND...60MPH
 
$$

CP

923 
WWUS54 KEWX 180705
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
205 AM CDT Thu Apr 18 2019

TXC013-180730-
/O.CON.KEWX.SV.W.0042.000000T0000Z-190418T0730Z/
Atascosa TX-
205 AM CDT Thu Apr 18 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR ATASCOSA COUNTY...

At 205 AM CDT, a severe thunderstorm was located 7 miles west of
Christine, moving northeast at 45 mph.

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

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Pleasanton, Jourdanton, Charlotte, Christine, Campbellton, Leming,
Fashing, Davis, Coughran, Peggy, Dobrowolski, McCoy, Hindes and
Graytown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This thunderstorm is capable of producing all types of severe weather
including extremely large hail, destructive straight line winds and
tornadoes. Move quickly to a safe shelter, such as an interior room,
a bathroom or closet or basement.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2864 9834 2864 9879 2890 9880 2910 9839
      2879 9810 2862 9832 2862 9834
TIME...MOT...LOC 0705Z 247DEG 39KT 2876 9861 

TORNADO...POSSIBLE
HAIL...0.88IN
WIND...60MPH
 
$$

CP

497 
WWUS54 KEWX 180724
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
224 AM CDT Thu Apr 18 2019

TXC013-180734-
/O.EXP.KEWX.SV.W.0042.000000T0000Z-190418T0730Z/
Atascosa TX-
224 AM CDT Thu Apr 18 2019

...THE SEVERE THUNDERSTORM WARNING FOR ATASCOSA COUNTY WILL EXPIRE AT
230 AM 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.  However small
hail, gusty winds and heavy rain are still possible with this
thunderstorm.

LAT...LON 2864 9834 2864 9879 2890 9880 2910 9839
      2879 9810 2862 9832 2862 9834
TIME...MOT...LOC 0724Z 247DEG 39KT 2883 9841 

$$

CP

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
1249 AM CDT Thu Apr 18 2019

.AVIATION...
TSRA line has cleared DRT and is quickly translating across
AUS/SAT/SSF early this morning ahead of a cold front. Expect
IFR/MVFR visibilities from brief heavy rain and variable wind gusts
between 35-40 knots at the terminals before the line exits.
Extrapolation of current line motion shows the line clearing the
terminals before 07-08Z and will plan on amending TAF to clear TSRA
out based on radar trends. West to northwest winds in the 5-11 knot
range will linger through sunrise as ceilings rise/scatter to VFR. As
the cold front pushes across the region mid to late morning, expect
north to northwest winds to increase into the 15-20 knot range with
stronger gusts in the 25-30 knot range. Forecast soundings indicate
some moisture lingering between FL035-070 and this may be enough to
result in some clouds later today, which may affect how much
mixing/how strong afternoon wind gusts are. Expect winds to fall
below 10 knots after sunset as the gradient relaxes.

&&

.PREV DISCUSSION... /ISSUED 705 PM CDT Wed Apr 17 2019/

AVIATION... /00Z TAFS/
New cell forming south of Dryden would suggest a slight delay in
convective activity around DRT, despite explosive storm growth
expected in the next 1-2 hours. It's position is well lined up the
the dryline which would take about 2 hours to move that far ESE.
Other cells forming over the Burro mountaintops could spread NE
slightly earlier. Meanwhile CI Probabilities over the capped shower
activity east of I-35 have occasionally spiked over 60 percent, but
the view on satellite and out the window with ragged cloud tops does
not suggest that the cap will break ahead of the organized storm
clusters to the west. Meso model trends and slow onset of
destabilization would suggest that the beginning of the squall lines
rolling into the I-35 terminals will be at or after midnight. Severe
threats will be addressed about an hour or two in advance of the
cells moving into the I-35 Terminals. but only about 30-45 minutes
lead time can be expected at DRT where the storms are more isolated.
Rapid improvements can be expected after 08Z at SAT/SSF and 09Z at
AUS. Gusty winds and fair skies should round out the end of the TAF
periods with models showing the winds not picking up significantly
until around 15Z or later.

PREV DISCUSSION... /ISSUED 305 PM CDT Wed Apr 17 2019/

SHORT TERM (Tonight through Thursday Night)...
Current surface observations across Texas show the dryline extending
across West Texas (roughly from a Childress to Snyder to Ozona line),
and the cold front pushing south across the Texas Panhandle, having
just made it through Amarillo. It is this cold front that will spur
on the thunderstorms expected tonight into Thursday morning. Current
short-term forecast soundings and the aircraft soundings from AUS and
SAT show the atmosphere still mostly capped across South Central
Texas.

With the capped atmosphere currently storms should hold off through
the rest of the afternoon and into the early evening hours. With the
dryline moving east and the front pushing rapidly south the front
will overtake the dryline and be the lift that South Central Texas
needs for storms. There is plenty of moisture in place with dewpoints
in the upper 60s and 70s. The HRRR and other high resolution
forecast models show storm initiation between 7pm and 9pm across the
Edwards Plateau. When storms do initially form the discrete storms
will have a very good chance of producing large hail to do the
environment with 2500 to 3000 j/kg of instability/CAPE. All of the
models show these discrete storms forming into a line of storms as
they approach the hill country between 10pm and 1am. With 50 knots or
more of bulk shear in place the severe weather threat will continue
as the line approach the I-35 corridor. With the transition into a
linear MCS the threat will also transition from a large hail threat
to a damaging straight-line wind threat within bowing sections of the
line. The line should approach the I-35 corridor between about 11pm
and 2am. Based on all of this a good portion of the Hill Country and
I-35 corridor have been included in the Enhanced Risk from the Storm
Prediction Center, with most of the area in a significant hail hashed
area as well. Basically our entire area is in the slight risk, again
mainly for the large hail and the damaging wind threat. There is a
low risk of tornadoes, but the main risk will be more to the NE
towards the ArkLaTex region.

As the storms push east of I-35 a new threat will be introduced.
While rainfall totals across the area will generally be 1/4 of an
inch to 1 inch, there has been increasing signals that parts of the
area east of I-35 could see isolated totals as high as 2-3 inches.
This could cause some localized minor flooding issues, especially in
areas that have seen decent rains of late. The line of storms will
continues its eastward progression and be east of the area by morning
rush hour on Thursday.

In the wake of the line of storms and cold front a drier airmass
filters in for Thursday. As skies clear strong north and northwest
winds increase. Some portions of the Rio Grande Plains could be close
to wind advisory criteria. In addition, with the lower relative
humidity values dropping down to 20-30 percent elevated to near
critical fire weather conditions are expected across the Rio Grande
Plains and Edwards Plateau. For the rest of the area afternoon highs
will be a few degrees below normal from the mid 70s to low 80s.
Overnight lows Thursday into Friday will also run a few degrees below
normal in the low to mid 50s.

LONG TERM (Friday through Wednesday)...
In the wake of the upper trough that will bring storms tonight into
Thursday morning northwest flow will build in aloft on Friday with
sunny skies continuing. With northerly flow aloft and at the surface
highs Friday will continue to run a few degrees below normal along
the I-35 corridor, with near normal temps along the Rio Grande in the
mid 70s to mid 80s. Southerly flow returns Saturday morning as an
upper level ridge works across Texas. Highs for the weekend will warm
into the 80s area wide, and should flirt with 90 degrees along the
Rio Grande Plains. Clouds return on Monday ahead of the next trough,
with continued seasonal temperatures. All of the long range models
(GFS, Canadian, and ECMWF) show the trough approaching Tuesday, and
moving across the OK/TX Red River Valley Wednesday into Thursday.
With the approaching trough and the moist atmosphere rain chances
begin Monday night and increase through the day Tuesday. Similar to
the system moving through today a cold front will approach Tuesday
night and Wednesday further enhancing rainfall.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              75  54  76  53  81 /  10   0   0   0   0
Austin Bergstrom Intl Airport  75  53  76  51  81 /  10   0   0   0   0
New Braunfels Muni Airport     76  52  78  52  82 /  10   0   0   0   0
Burnet Muni Airport            72  52  75  51  81 /  10   0   0   0   0
Del Rio Intl Airport           82  55  85  58  89 /   0   0   0   0   0
Georgetown Muni Airport        73  52  75  51  81 /  10   0   0   0   0
Hondo Muni Airport             79  52  82  53  85 /   0   0   0   0   0
San Marcos Muni Airport        76  52  77  51  81 /  10   0   0   0   0
La Grange - Fayette Regional   77  53  75  51  81 /  20   0   0   0   0
San Antonio Intl Airport       77  54  80  54  83 /  -    0   0   0   0
Stinson Muni Airport           77  55  80  54  83 /  -    0   0   0   0

&&

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

Aviation...Huffman
Short-Term/Long-Term...YB

Hazardous Weather Outlook
National Weather Service Austin/San Antonio TX
253 PM CDT Wed Apr 17 2019

TXZ171>173-183>194-202>209-217>225-228-182000-
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-
253 PM CDT Wed Apr 17 2019

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

.DAY ONE...This Afternoon And Tonight.

Strong to severe thunderstorms are possible this evening into
early Thursday morning across much of South Central Texas. Large
hail and damaging winds are the most likely threat, but an
isolated tornado and locally heavy rain will also be possible.

Elevated fire weather conditions will be possible across the
northwestern portions of Val Verde county this afternoon.

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

Elevated to near critical fire weather conditions are possible
across the Edwards Plateau and Rio Grande Plains Thursday due to
low relative humidity and breezy winds.

.SPOTTER INFORMATION STATEMENT...

With severe thunderstorms possible Wednesday, please report any
severe weather to the National Weather Service.

Special Weather Statement
National Weather Service Austin/San Antonio TX
1139 PM CDT Wed Apr 17 2019

TXZ172-173-192-180545-
Williamson TX-Burnet TX-Travis TX-
1139 PM CDT Wed Apr 17 2019

...SIGNIFICANT WEATHER ADVISORY FOR WILLIAMSON...NORTHERN TRAVIS AND
SOUTHEASTERN BURNET COUNTIES UNTIL 1245 AM CDT...

At 1139 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Jarrell to near Hudson Bend. Movement was
east at 35 mph.

Penny size hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
Austin, Round Rock, Cedar Park, Georgetown, Pflugerville, Taylor,
Granger, Anderson Mill, Serenada, Windemere, Leander, Hutto, Lago
Vista, Hudson Bend, Bartlett, Liberty Hill, Jarrell, Florence, Thrall
and Weir.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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.

&&

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
south central Texas.

LAT...LON 3091 9783 3087 9762 3074 9727 3058 9720
      3042 9728 3040 9733 3042 9737 3039 9739
      3043 9812 3045 9822 3094 9785
TIME...MOT...LOC 0439Z 273DEG 32KT 3087 9768 3045 9792

MO

Special Weather Statement
National Weather Service Austin/San Antonio TX
1212 AM CDT Thu Apr 18 2019

TXZ204>207-219>223-180615-
Guadalupe TX-Frio TX-Comal TX-Karnes TX-Bexar TX-Atascosa TX-
Gonzales TX-Medina TX-Wilson TX-
1212 AM CDT Thu Apr 18 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MEDINA...
GUADALUPE...CENTRAL KARNES...NORTHEASTERN FRIO...SOUTHWESTERN
GONZALES...ATASCOSA...WILSON...BEXAR AND SOUTHEASTERN COMAL COUNTIES
UNTIL 115 AM CDT...

At 1211 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near New Braunfels to Pearson. Movement was
southeast at 45 mph.

Wind gusts of 50 to 55 mph will be possible with these storms.

Locations impacted include...
San Antonio, New Braunfels, Schertz, Seguin, Cibolo, Universal City,
Live Oak, Pleasanton, Selma, Floresville, Jourdanton, Poteet,
Castroville, Poth, Charlotte, Stockdale, Christine, Kosciusko, San
Antonio Int Airport and Randolph AFB.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

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.

&&

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
south central Texas.

LAT...LON 2943 9737 2896 9787 2874 9834 2867 9882
      2945 9885 2979 9821
TIME...MOT...LOC 0511Z 293DEG 39KT 2966 9816 2927 9884

CP

Special Weather Statement
National Weather Service Austin/San Antonio TX
1236 AM CDT Thu Apr 18 2019

TXZ173-193-194-209-180630-
Williamson TX-Bastrop TX-Fayette TX-Lee TX-
1236 AM CDT Thu Apr 18 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN WILLIAMSON...
BASTROP...LEE AND CENTRAL FAYETTE COUNTIES UNTIL 130 AM CDT...

At 1236 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Thorndale to 8 miles northeast of
Lockhart. Movement was east at 40 mph.

Half inch hail and wind gusts of 50 to 55 mph will be possible with
these storms.

Locations impacted include...
Elgin, Bastrop, Giddings, La Grange, Smithville, Flatonia, Lexington,
Dime Box, Fedor, Camp Swift, Circle D-KC Estates, Cedar Creek,
Rosanky, Paige, Muldoon, Tanglewood, Cistern, Lake Somerville State
Park & Trailway, Wyldwood and Upton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

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

&&

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
south central Texas.

LAT...LON 3025 9669 3024 9674 3020 9674 3016 9679
      3014 9677 3015 9673 2963 9707 2963 9710
      3000 9757 3060 9722 3046 9715 3055 9698
      3054 9693 3049 9690 3046 9690 3046 9688
      3039 9679 3032 9674 3032 9669 3029 9664
TIME...MOT...LOC 0536Z 290DEG 33KT 3054 9721 2997 9756

MO

Special Weather Statement
National Weather Service Austin/San Antonio TX
1242 AM CDT Thu Apr 18 2019

TXZ228-180630-
Dimmit TX-
1242 AM CDT Thu Apr 18 2019

...SIGNIFICANT WEATHER ADVISORY FOR DIMMIT COUNTY UNTIL 130 AM CDT...

At 1241 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Asherton to near Gilson Groves. Movement
was east at 35 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
Carrizo Springs, Big Wells, Asherton, Winter Haven, Brundage,
Chaparral Wildlife Management Area, Light, Carrizo Hill, Gilson
Groves, Catarina and Las Vegas.

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
south central Texas.

LAT...LON 2863 9998 2862 9941 2821 9941 2820 9999
TIME...MOT...LOC 0541Z 252DEG 30KT 2850 9970 2831 9974

CP

Special Weather Statement
National Weather Service Austin/San Antonio TX
1244 AM CDT Thu Apr 18 2019

TXZ207>209-223-180630-
Guadalupe TX-Caldwell TX-Fayette TX-Gonzales TX-
1244 AM CDT Thu Apr 18 2019

...SIGNIFICANT WEATHER ADVISORY FOR CALDWELL...NORTHEASTERN
GUADALUPE...NORTHEASTERN GONZALES AND SOUTHWESTERN FAYETTE COUNTIES
UNTIL 130 AM CDT...

At 1243 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 9 miles southwest of Rosanky to near Kingsbury.
Movement was south at 20 mph.

Half inch hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
Seguin, Lockhart, Gonzales, Luling, Flatonia, Martindale, Waelder,
Kingsbury, Staples, Fentress, Palmeto State Park, Zorn, Geronimo,
Brownsboro, Delhi, Joliet, Maxwell, McNeil, Dilworth and Lytton
Springs.

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
south central Texas.

LAT...LON 2963 9707 2962 9715 2958 9721 2954 9720
      2943 9738 2972 9805 3001 9760 2993 9749
      2979 9732 2980 9729 2964 9705
TIME...MOT...LOC 0543Z 340DEG 19KT 2984 9741 2961 9780

CP

Special Weather Statement
National Weather Service Austin/San Antonio TX
114 AM CDT Thu Apr 18 2019

TXZ193-194-207>209-220>225-180730-
Guadalupe TX-Karnes TX-Atascosa TX-Caldwell TX-Lavaca TX-Bastrop TX-
De Witt TX-Fayette TX-Gonzales TX-Wilson TX-Lee TX-
114 AM CDT Thu Apr 18 2019

...SIGNIFICANT WEATHER ADVISORY FOR CALDWELL...DEWITT...EASTERN
GUADALUPE...KARNES...BASTROP...LEE...GONZALES...SOUTHERN ATASCOSA...
FAYETTE...LAVACA AND WILSON COUNTIES UNTIL 230 AM CDT...

At 113 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Lake Somerville State Park & Trailway to
Sutherland Springs to 6 miles south of Christine. Movement was
southeast at 35 mph.

Half inch hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
Seguin, Lockhart, Pleasanton, Cuero, Bastrop, Gonzales, Floresville,
Yoakum, Luling, Giddings, La Grange, Jourdanton, Smithville, Kenedy,
Karnes City, Schulenburg, Hallettsville, Poth, Yorktown and Shiner.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

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.

&&

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
south central Texas.

LAT...LON 2887 9731 2892 9743 2867 9778 2872 9792
      2869 9801 2879 9810 2862 9833 2865 9880
      2905 9838 3043 9725 3056 9697 3054 9692
      3046 9690 3032 9669 3025 9668 3016 9679
      3015 9666 2991 9661 2963 9687 2934 9657
TIME...MOT...LOC 0613Z 293DEG 29KT 3034 9669 2928 9809 2870 9846

CP