Alert archive / Texas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 143, NWS Austin/San Antonio, TX

May 28, 2017Travis County, Williamson County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 28, 2017, 6:12 PM CDT for Travis County, Williamson County, Texas. It was in force for 48 min. 9 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 28, 2017, 6:12 PM CDT (23:12 UTC)
Expired: May 28, 2017, 7:00 PM CDT
In force: 48 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Travis County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 48 km from the middle of the area, began a volume at 23:15 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.

What was reported inside it

Time	Report	Where	Remark
May 28, 6:23 PM CDT	HAIL 0.25	4 Nne Austin, TX
May 28, 6:41 PM CDT	TSTM WND DMG	1 Ene Anderson Mill, TX	REPORT OF TREE LIMBS DOWN NEAR THE INTERSECTION OF 183 AND 45/620 IN THE LAKE CREEK AREA. 13508 HYDMEADOW CIRCLE. WIND ESTIMATE OF 40-50 MPH.
May 28, 6:45 PM CDT	TSTM WND DMG	Wells Branch, TX	TREE SNAPPED IN THE FRONT YARD OF A RESIDENCE IN THE WELLS BRANCH AREA RECEIVED VIA KXAN SOCIAL MEDIA.
May 28, 6:55 PM CDT	TSTM WND DMG	3 Ene Austin, TX	REPORTS OF A DOWN-BURST RESULTING IN TREE LIMB DAMAGE FROM TWITTER.
May 28, 6:58 PM CDT	TSTM WND DMG	4 Nne Pflugerville, TX	RECEIVED A REPORT OF PART OF A FENCE BEING BLOWN DOWN NEAR DEARING ELEMENTARY SCHOOL VIA TWITTER.
May 28, 6:58 PM CDT	TSTM WND DMG	4 Wnw Manor, TX	DOWNED BRANCHES COVERING HARRIS BRANCH PARKWAY.
May 28, 6:58 PM CDT	TSTM WND DMG	5 S Pflugerville, TX	DOWNED BRANCHES COVERING HARRIS BRANCH PARKWAY
May 28, 6:59 PM CDT	HAIL 0.5	3 Nnw Austin, TX	CAMP MABRY GATE SECURITY REPORTED PEA TO DIME SIZED HAIL UP TO 0.60 INCHES IN DIAMETER THAT CONTINUED FOR 11 MINUTES ENDING AT 710PM.
May 28, 7:08 PM CDT	TSTM WND DMG	2 Ene Manor, TX	SMALL TREE LIMBS DOWN AND PENNY SIZED HAIL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 6 storm reports to this severe thunderstorm warning; the first came 29 minutes after it went out.

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

Fort Worth, TX (KFWD), launched 12:00Z, 11.2 hours before the alert went out and 265 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: 1005 J/kg
Mixed-layer CIN: -290 J/kg
Mixed-layer LCL: 874 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 227 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.3

Open this sounding in Storm Lab

The text

As transmitted.

093 
WUUS54 KEWX 282312
SVREWX
TXC453-491-290000-
/O.NEW.KEWX.SV.W.0143.170528T2312Z-170529T0000Z/

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

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Southwestern Williamson County in south central Texas...
  Travis County in south central Texas...

* Until 700 PM CDT

* At 612 PM CDT, a severe thunderstorm was located near Austin,
  moving northeast at 5 mph.

  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...
  Austin, Round Rock, Cedar Park, Georgetown, Pflugerville, Elgin,
  Austin Bergstrom Int Ap, Anderson Mill, Windemere, Leander, Hutto,
  Lakeway, Lago Vista, Manor, Bee Cave, West Lake Hills, The Hills,
  Rollingwood, Liberty Hill and Barton Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3068 9774 3056 9754 3042 9736 3026 9746
      3012 9763 3036 9816 3046 9810 3049 9811
      3062 9805 3076 9796
TIME...MOT...LOC 2312Z 228DEG 5KT 3035 9768 

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

HAMPSHIRE

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, 2 hours 52 minutes earlier.

Area forecast discussion, May 28, 3:20 PM CDT, 2 hours 52 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, 13 hours 35 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

Local storm report, May 28, 5:31 PM CDT, 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
531 PM CDT SUN MAY 28 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0439 PM     HAIL             11 WSW CARTA VALLEY     29.72N 100.83W
05/28/2017  E1.75 INCH       VAL VERDE          TX   CO-OP OBSERVER

            DEL RIO COOP OBSERVER RELAYED GOLF BALL HAIL
            REPORT AT THE TEXAS BORDER PATROL STATION
            NEAR THE INTERSECTION OF US 277 AND US 377.

&&

TB3

Local storm report, May 28, 5:33 PM CDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
533 PM CDT SUN MAY 28 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0432 PM     HAIL             2 S ROCKSPRINGS         29.99N 100.21W
05/28/2017  E1.50 INCH       EDWARDS            TX   EMERGENCY MNGR

            TIME ESTIMATED WITH RADAR.

&&

CVP

Local storm report, May 28, 5:36 PM CDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
536 PM CDT SUN MAY 28 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0344 PM     HAIL             CARTA VALLEY            29.79N 100.68W
05/28/2017  E2.75 INCH       EDWARDS            TX   EMERGENCY MNGR

            TIME ESTIMATED WITH RADAR.

&&

CVP

Local storm report, May 28, 5:39 PM CDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
539 PM CDT SUN MAY 28 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0533 PM     HAIL             4 NNW LIBERTY HILL      30.73N 97.93W
05/28/2017  M0.75 INCH       WILLIAMSON         TX   AMATEUR RADIO

            BLESSING RANCH AT CR 200.

&&

CVP

Local storm report, May 28, 5:54 PM CDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
554 PM CDT SUN MAY 28 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0520 PM     HAIL             4 N LIBERTY HILL        30.72N 97.92W
05/28/2017  E1.00 INCH       WILLIAMSON         TX   PUBLIC

            HAIL UP TO QUARTER SIZE.

&&

CVP

Special weather statement, May 28, 6:09 PM CDT, 3 minutes before

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

TXZ186-290000-
Kerr TX-
609 PM CDT SUN MAY 28 2017

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL KERR COUNTY UNTIL
700 PM CDT...

At 609 PM CDT, Doppler radar was tracking a strong thunderstorm over
Kerrville State Park, or over Kerrville, moving east at 10 mph.

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

Locations impacted include...
Kerrville, Comfort, Center Point, Cypress Creek and Kerrville State
Park.

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

LAT...LON 2995 9892 2987 9893 2995 9923 3013 9921
      3014 9892
TIME...MOT...LOC 2309Z 280DEG 8KT 3002 9914

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, 3:57 PM CDT	Severe Thunderstorm Warning	EWX	Kerr	78 min
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, 6:28 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.