Alert archive / Texas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 135, NWS Austin/San Antonio, TX

May 28, 2017Kerr County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 28, 2017, 3:57 PM CDT for Kerr County, Texas. It was in force for 78 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 28, 2017, 3:57 PM CDT (20:57 UTC)
Expired: May 28, 2017, 5:15 PM CDT
In force: 78 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Kerr County, TX

The radar

The Laughlin AFB radar (KDFX), 120 km from the middle of the area, began a volume at 20:56 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 28, 3:09 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Del Rio, TX (KDLF), launched 12:00Z, 9.0 hours before the alert went out and 154 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 3017 J/kg
Mixed-layer CIN: -339 J/kg
Mixed-layer LCL: 1097 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

925 
WUUS54 KEWX 282057
SVREWX
TXC265-282215-
/O.NEW.KEWX.SV.W.0135.170528T2057Z-170528T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
357 PM CDT SUN MAY 28 2017

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Northwestern Kerr County in south central Texas...

* Until 515 PM CDT

* At 357 PM CDT, a severe thunderstorm was located near Kerr Wildlife
  Management Area, or 21 miles north of Vanderpool, and is nearly
  stationary.

  HAZARD...60 mph wind gusts and half dollar size hail. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Hunt, Mountain Home, Kerr Wildlife Management Area and Waltonia. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3014 9930 3013 9928 2990 9925 2991 9969
      3007 9969 3008 9975 3022 9975 3025 9930
TIME...MOT...LOC 2057Z 299DEG 2KT 3004 9951 

HAIL...1.25IN
WIND...60MPH
 
$$

HAMPSHIRE

3 follow-up statements

327 
WWUS54 KEWX 282115
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
415 PM CDT SUN MAY 28 2017

TXC265-282215-
/O.CON.KEWX.SV.W.0135.000000T0000Z-170528T2215Z/
Kerr TX-
415 PM CDT SUN MAY 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR NORTHWESTERN KERR COUNTY...

At 415 PM CDT, a severe thunderstorm was located near Kerr Wildlife
Management Area, or 20 miles north of Vanderpool, and is nearly
stationary.

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...
Hunt, Mountain Home, Kerr Wildlife Management Area and Waltonia. 

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 3014 9930 3013 9928 2990 9925 2991 9969
      3007 9969 3008 9975 3022 9975 3025 9930
TIME...MOT...LOC 2115Z 274DEG 2KT 3004 9958 

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

HAMPSHIRE

180 
WWUS54 KEWX 282157
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
457 PM CDT SUN MAY 28 2017

TXC265-282215-
/O.CON.KEWX.SV.W.0135.000000T0000Z-170528T2215Z/
Kerr TX-
457 PM CDT SUN MAY 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR NORTHWESTERN KERR COUNTY...

At 457 PM CDT, a severe thunderstorm was located near Kerr Wildlife
Management Area, or 20 miles north of Vanderpool, and is nearly
stationary.

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...
Kerr Wildlife Management Area.

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 3009 9946 3001 9941 2990 9940 2991 9969
      3007 9969 3008 9975 3022 9975 3024 9947
TIME...MOT...LOC 2157Z 299DEG 2KT 3003 9956 

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

AAT

975 
WWUS54 KEWX 282212
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
512 PM CDT SUN MAY 28 2017

TXC265-282222-
/O.EXP.KEWX.SV.W.0135.000000T0000Z-170528T2215Z/
Kerr TX-
512 PM CDT SUN MAY 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN KERR COUNTY WILL
EXPIRE AT 515 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.

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

LAT...LON 3009 9946 3001 9941 2990 9940 2991 9969
      3007 9969 3008 9975 3022 9975 3024 9947
TIME...MOT...LOC 2212Z 299DEG 2KT 3003 9955 

$$

AAT

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 28, 3:20 PM CDT, 37 minutes earlier.

Area forecast discussion, May 28, 3:20 PM CDT, 37 minutes before

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
320 PM CDT Sun May 28 2017

.UPDATE...
We've issued a Severe Thunderstorm Watch for the entire CWA until 10
pm. Storms have developed along the front and will continue into the
evening. We have already issued a couple of Severe Thunderstorm
Warnings and expect this to continue.

&&

.PREV DISCUSSION... /ISSUED 250 PM CDT Sun May 28 2017/

SHORT TERM (Tonight through Monday Night)...
Upper air analysis this morning showed west-southwesterly flow over
TX with a trough from central Canada to the Four Corners. At the
surface, a cold front was moving into our northwestern counties.
Winds ahead of the front were from the east to southeast and dewpoint
temperatures were in the lower to middle 70s. The upper level trough
will move across TX during this period. With the upper flow nearly
parallel to the front, it will move slowly through the area tonight
and Monday. This will mean showers and thunderstorms will be likely
tonight and Monday. At the start of the period, model soundings show
CAPE around 4000 j/kg, but with 0-6 km wind shear only 20-30 kts.
This could produce strong to severe thunderstorms with large hail as
the mostly likely threat this evening. Atmosphere is fairly uniform
across the CWA, so where storms are worst will depend on how things
develop with small scale features that are not well resolved now.
Storms should weaken below severe strength by midnight. Expect
convection to continue overnight and during the day Monday. Monday
night chances will decrease with slight to low chance POPs.

LONG TERM (Tuesday through Sunday)...
The pattern will remain unsettled through the week with west-
southwesterly flow aloft. A series of short wave troughs will move
through the pattern bringing chances for convection. Wednesday night
and Thursday a stronger short wave will bring a better chance for
showers and thunderstorms and some higher rainfall totals. The
overall pattern will change little toward the end of the period and
low chances for convection will remain in the forecast until the end
of the forecast.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              70  82  67  85  68 /  70  50  30  40  30
Austin Bergstrom Intl Airport  69  81  66  85  67 /  70  50  30  40  30
New Braunfels Muni Airport     70  80  66  84  68 /  70  60  30  40  30
Burnet Muni Airport            67  80  65  83  66 /  60  40  20  30  30
Del Rio Intl Airport           70  84  69  84  70 /  60  30  30  30  40
Georgetown Muni Airport        68  81  65  83  67 /  70  40  30  40  30
Hondo Muni Airport             69  83  68  86  68 /  70  40  30  40  30
San Marcos Muni Airport        70  80  66  85  68 /  70  60  30  40  30
La Grange - Fayette Regional   71  81  68  85  69 /  70  70  30  40  30
San Antonio Intl Airport       70  82  68  85  70 /  70  50  30  40  30
Stinson Muni Airport           72  80  69  84  70 /  70  50  30  40  30

&&

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

Mesoscale/Aviation...24
Synoptic/Grids...05
Public Service/Data Collection...33

Hazardous weather outlook, May 28, 4:37 AM CDT, 11 hours 20 minutes before

Hazardous Weather Outlook
National Weather Service Austin/San Antonio TX
437 AM CDT Sun May 28 2017

TXZ171>173-183>194-202>209-217>225-228-291100-
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-
437 AM CDT Sun May 28 2017

This Hazardous Weather Outlook is for South-Central Texas.

.DAY ONE...Today And Tonight.

Scattered showers and thunderstorms are expected this afternoon
and tonight. Strong to severe storms are possible along with
locally heavy rainfall. Main threats will be large hail and
damaging winds. Heavy rainfall from the storms may cause localized
flash flooding.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Rounds of thunderstorms are forecast Monday through Saturday.
Strong storms and locally heavy rains are possible through the
period.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

In the hours before

Special weather statement, May 28, 2:43 PM CDT, 1 hour 14 minutes before

Special Weather Statement
National Weather Service Austin/San Antonio TX
243 PM CDT SUN MAY 28 2017

TXZ184-185-282030-
Edwards TX-Real TX-
243 PM CDT SUN MAY 28 2017

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL EDWARDS AND CENTRAL REAL
COUNTIES UNTIL 330 PM CDT...

At 243 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles north of Vance, or 14 miles southeast of Rocksprings, moving
east at 10 mph.

Dime size hail will be possible with this storm.

Locations impacted include...
Vance and Prade Ranch.

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.

LAT...LON 2982 10007 3000 10011 3006 9979 2979 9977
TIME...MOT...LOC 1943Z 265DEG 7KT 2992 10000

HAMPSHIRE

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 28, 12:05 AM CDT	Special Weather Statement	EWX	Burnet	40 min
May 28, 2:43 PM CDT	Special Weather Statement	EWX	Real	47 min
May 28, 2:53 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Real	82 min
May 28, 3:13 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Val Verde	77 min
May 28, 3:25 PM CDT	Flash Flood Warning	EWX	Edwards, Kinney, Real, Val Verde	4 hr
May 28, 4:12 PM CDT	Special Weather Statement	EWX	Gillespie	48 min
May 28, 4:12 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Real	78 min
May 28, 4:31 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Val Verde	74 min
May 28, 4:48 PM CDT	Special Weather Statement	EWX	Burnet	42 min
May 28, 4:51 PM CDT	Areal Flood Advisory	EWX	Kerr, Real	3 hr
May 28, 4:54 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Gillespie	47 min
May 28, 4:57 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Williamson	46 min
May 28, 5:05 PM CDT	Areal Flood Advisory	EWX	Blanco, Burnet, Gillespie	3 hr
May 28, 5:19 PM CDT	Areal Flood Advisory	EWX	Burnet, Williamson	3 hr
May 28, 5:29 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Real	31 min
May 28, 5:33 PM CDT	Flash Flood Warning	EWX	Edwards, Kerr, Real, Uvalde	3 hr
May 28, 5:40 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Val Verde	80 min
May 28, 5:41 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Val Verde	79 min
May 28, 5:42 PM CDT	Flash Flood Warning	EWX	Blanco, Burnet, Gillespie, Kerr	4 hr
May 28, 5:56 PM CDT	Areal Flood Advisory	EWX	Kinney, Val Verde	3 hr
May 28, 5:59 PM CDT	Areal Flood Advisory	EWX	Edwards, Val Verde	3 hr
May 28, 6:09 PM CDT	Special Weather Statement	EWX	Kerr	51 min
May 28, 6:12 PM CDT	Severe Thunderstorm Warning	EWX	Travis, Williamson	48 min
May 28, 6:28 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Kendall, Kerr	62 min
May 28, 6:36 PM CDT	Severe Thunderstorm Warning	EWX	Frio, Medina, Uvalde, Zavala	69 min
May 28, 6:44 PM CDT	Flash Flood Warning	EWX	Edwards, Kinney, Val Verde	4 hr
May 28, 6:58 PM CDT	Special Weather Statement	EWX	Dimmit	47 min

Nearby

Severe Thunderstorm Warnings in Texas, 2017 Every severe thunderstorm warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.