Alert archive / Texas / Special Weather Statements in 2017

Special Weather Statement, NWS Austin/San Antonio, TX

April 11, 2017Kendall County, Texas

NWS Austin/San Antonio, TX issued this special weather statement at Apr 11, 2017, 4:57 AM CDT for Kendall County, Texas. It was in force for 48 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: Apr 11, 2017, 4:57 AM CDT (09:57 UTC)
Expired: Apr 11, 2017, 5:45 AM CDT
In force: 48 min
Issued by: NWS Austin/San Antonio, TX

County Kendall County, TX

The radar

The Austin/San Antonio radar (KEWX), 56 km from the middle of the area, began a volume at 09:57 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.

The nearest sounding before it

Del Rio, TX (KDLF), launched 00:00Z, 10.0 hours before the alert went out and 224 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: 2462 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1270 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -51 m²/s²
0-3 km storm-relative helicity: -68 m²/s²
Significant tornado parameter: -0.4
Supercell composite: -3.9

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 11, 3:33 AM CDT, 1 hour 24 minutes earlier.

Area forecast discussion, Apr 11, 3:33 AM CDT, 1 hour 24 minutes before

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Hazardous weather outlook, Apr 11, 1:55 AM CDT, 3 hours 2 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Austin/San Antonio TX
155 AM CDT Tue Apr 11 2017

TXZ171>173-183>194-202>209-217>225-228-120700-
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-
155 AM CDT Tue Apr 11 2017

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

.DAY ONE...Rest of tonight.

A Flash Flood Watch is in effect for most of South Central Texas
through 7 am. Rain totals of 1 to 3 inches with isolated amounts
to 5 inches are possible through Tuesday morning...mainly for
areas along and east of the Edwards escarpment, including the
Interstate 35 corridor. This could lead to flash flooding for
these areas.

In addition...hail up to one inch in diameter and gusty winds up
to 60 mph are possible. A Severe Thunderstorm Watch is also in
effect through 7 am Tuesday, but these threats are secondary to
the main flash flooding threat.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected for the extended period.

.SPOTTER INFORMATION STATEMENT...

Please submit any flooding or severe weather reports to the
National Weather Service.

In the hours before

Special weather statement, Apr 11, 3:15 AM CDT, 1 hour 42 minutes before

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Special weather statement, Apr 11, 3:58 AM CDT, 59 minutes before

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Local storm report, Apr 11, 4:33 AM CDT, 24 minutes before

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Local storm report, Apr 11, 4:49 AM CDT, 8 minutes before

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Local storm report, Apr 11, 4:53 AM CDT, 4 minutes before

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Special weather statement, Apr 11, 4:57 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Austin/San Antonio TX
457 AM CDT TUE APR 11 2017

TXZ189-206-111045-
Comal TX-Kendall TX-
457 AM CDT TUE APR 11 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN KENDALL AND WEST
CENTRAL COMAL COUNTIES UNTIL 545 AM CDT...

At 457 AM CDT, Doppler radar was tracking a strong thunderstorm over
Bergheim, or 7 miles east of Boerne, moving east at 15 mph.

Nickel size hail will be possible with this storm.

Locations impacted include...
Guadalupe River State Park, Kreutzberg, Bergheim and Anhalt.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2980 9869 2986 9869 2991 9843 2979 9843
TIME...MOT...LOC 0957Z 268DEG 15KT 2983 9863

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 8:26 PM CDT	Special Weather Statement	EWX	Llano	49 min
Apr 10, 8:50 PM CDT	Severe Thunderstorm Warning	EWX	Llano	55 min
Apr 10, 9:32 PM CDT	Areal Flood Advisory	EWX	Llano	4 hr
Apr 10, 9:35 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	70 min
Apr 10, 9:43 PM CDT	Severe Thunderstorm Warning	EWX	Llano	62 min
Apr 10, 10:41 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	64 min
Apr 10, 10:45 PM CDT	Severe Thunderstorm Warning	EWX	Llano	45 min
Apr 10, 10:50 PM CDT	Flash Flood Warning	EWX	Llano	3 hr
Apr 10, 11:28 PM CDT	Special Weather Statement	EWX	Llano	62 min
Apr 10, 11:46 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	29 min
Apr 11, 12:13 AM CDT	Severe Thunderstorm Warning	EWX	Val Verde	47 min
Apr 11, 12:29 AM CDT	Special Weather Statement	EWX	Gillespie	76 min
Apr 11, 12:58 AM CDT	Special Weather Statement	EWX	Val Verde	62 min
Apr 11, 2:30 AM CDT	Special Weather Statement	EWX	Kendall	45 min
Apr 11, 3:15 AM CDT	Special Weather Statement	EWX	Kendall	45 min
Apr 11, 3:53 AM CDT	Areal Flood Advisory	EWX	Kendall, Kerr	3 hr
Apr 11, 3:58 AM CDT	Special Weather Statement	EWX	Kendall	47 min
Apr 11, 4:14 AM CDT	Severe Thunderstorm Warning	EWX	Kendall	46 min
Apr 11, 4:24 AM CDT	Flash Flood Warning	EWX	Kendall	3 hr
Apr 11, 5:19 AM CDT	Areal Flood Advisory	EWX	Kendall	116 min
Apr 11, 8:19 AM CDT	Special Weather Statement	EWX	Burnet	26 min
Apr 11, 9:31 AM CDT	Special Weather Statement	EWX	Williamson	44 min
Apr 11, 9:43 AM CDT	Special Weather Statement	EWX	Hays	47 min
Apr 11, 10:08 AM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Hays, Travis, Williamson	52 min
Apr 11, 10:18 AM CDT	Areal Flood Advisory	EWX	Blanco, Hays, Travis	3 hr
Apr 11, 10:31 AM CDT	Special Weather Statement	EWX	Williamson	44 min
Apr 11, 10:51 AM CDT	Areal Flood Advisory	EWX	Williamson	3 hr
Apr 11, 10:55 AM CDT	Severe Thunderstorm Warning	EWX	Hays	35 min
Apr 11, 11:01 AM CDT	Special Weather Statement	EWX	Blanco	29 min
Apr 11, 11:15 AM CDT	Special Weather Statement	EWX	Caldwell	30 min
Apr 11, 11:19 AM CDT	Special Weather Statement	EWX	Lee	26 min
Apr 11, 11:30 AM CDT	Areal Flood Advisory	EWX	Blanco, Comal, Hays	4 hr
Apr 11, 11:31 AM CDT	Special Weather Statement	EWX	Hays	29 min
Apr 11, 11:40 AM CDT	Severe Thunderstorm Warning	EWX	Blanco, Comal, Hays, Kendall	50 min
Apr 11, 11:56 AM CDT	Special Weather Statement	EWX	Caldwell	49 min
Apr 11, 11:57 AM CDT	Flash Flood Warning	EWX	Caldwell, Hays	3 hr
Apr 11, 12:19 PM CDT	Special Weather Statement	EWX	Travis	41 min
Apr 11, 12:21 PM CDT	Severe Thunderstorm Warning	EWX	Caldwell, Guadalupe, Hays	54 min
Apr 11, 12:34 PM CDT	Severe Thunderstorm Warning	EWX	Comal	41 min
Apr 11, 12:45 PM CDT	Areal Flood Advisory	EWX	Bastrop, Fayette, Lee	4 hr
Apr 11, 12:52 PM CDT	Tornado Warning	EWX	Guadalupe	23 min
Apr 11, 12:56 PM CDT	Special Weather Statement	EWX	Bastrop	49 min
Apr 11, 1:05 PM CDT	Areal Flood Advisory	EWX	Caldwell, Comal, Guadalupe	4 hr
Apr 11, 1:06 PM CDT	Severe Thunderstorm Warning	EWX	Comal, Guadalupe	39 min
Apr 11, 1:15 PM CDT	Tornado Warning	EWX	Guadalupe	30 min
Apr 11, 1:20 PM CDT	Special Weather Statement	EWX	Llano	40 min
Apr 11, 1:24 PM CDT	Flash Flood Warning	EWX	Comal, Guadalupe, Hays	4 hr
Apr 11, 1:44 PM CDT	Severe Thunderstorm Warning	EWX	Guadalupe, Wilson	32 min
Apr 11, 1:57 PM CDT	River Flood Warning	EWX	Blanco	17 hr
Apr 11, 1:57 PM CDT	River Flood Warning	EWX	Hays	23 hr
Apr 11, 1:57 PM CDT	River Flood Warning	EWX	Hays	20 hr
Apr 11, 1:58 PM CDT	Special Weather Statement	EWX	Bexar	47 min
Apr 11, 2:04 PM CDT	Special Weather Statement	EWX	Guadalupe	41 min
Apr 11, 2:07 PM CDT	Areal Flood Advisory	EWX	Bexar	4 hr
Apr 11, 2:21 PM CDT	Areal Flood Advisory	EWX	Blanco, Burnet, Travis, Williamson	3 hr
Apr 11, 2:27 PM CDT	Severe Thunderstorm Warning	EWX	Gonzales, Guadalupe	36 min
Apr 11, 2:36 PM CDT	Areal Flood Advisory	EWX	Guadalupe	3 hr
Apr 11, 2:36 PM CDT	River Flood Warning	EWX	Guadalupe	18 hr
Apr 11, 2:45 PM CDT	Special Weather Statement	EWX	Bexar	45 min
Apr 11, 2:57 PM CDT	Areal Flood Advisory	EWX	Bandera, Medina	3 hr
Apr 11, 3:19 PM CDT	Special Weather Statement	EWX	Frio	41 min
Apr 11, 3:27 PM CDT	Special Weather Statement	EWX	Medina	48 min
Apr 11, 3:32 PM CDT	Special Weather Statement	EWX	Bexar	43 min
Apr 11, 3:35 PM CDT	Special Weather Statement	EWX	Karnes	40 min
Apr 11, 3:48 PM CDT	Severe Thunderstorm Warning	EWX	Frio, Zavala	42 min
Apr 11, 4:00 PM CDT	Areal Flood Advisory	EWX	DeWitt, Gonzales, Karnes, Wilson	3 hr
Apr 11, 4:05 PM CDT	Special Weather Statement	EWX	Uvalde	40 min
Apr 11, 4:07 PM CDT	Special Weather Statement	EWX	Maverick	38 min
Apr 11, 4:17 PM CDT	Special Weather Statement	EWX	Dimmit	43 min
Apr 11, 4:25 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit	50 min
Apr 11, 4:34 PM CDT	Special Weather Statement	EWX	Atascosa	41 min
Apr 11, 4:56 PM CDT	Special Weather Statement	EWX	Dimmit	49 min
Apr 11, 5:01 PM CDT	Special Weather Statement	EWX	Dimmit	44 min
Apr 11, 5:06 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit	39 min
Apr 11, 5:14 PM CDT	Areal Flood Advisory	EWX	Uvalde	3 hr
Apr 11, 5:37 PM CDT	Special Weather Statement	EWX	Zavala	53 min
Apr 11, 5:41 PM CDT	Special Weather Statement	EWX	Maverick	49 min
Apr 11, 5:45 PM CDT	River Flood Warning	EWX	Caldwell, Gonzales	33 hr

Nearby

Special Weather Statements in Texas, 2017 Every special weather statement 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.