Alert archive / Texas / Special Weather Statements in 2017

Special Weather Statement, NWS Austin/San Antonio, TX

March 29, 2017Guadalupe County, Texas

NWS Austin/San Antonio, TX issued this special weather statement at Mar 29, 2017, 4:16 AM CDT for Guadalupe County, Texas. It was in force for 29 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
Mar 29, 2017, 4:16 AM CDT (09:16 UTC)
Expired
Mar 29, 2017, 4:45 AM CDT
In force
29 min
Issued by
NWS Austin/San Antonio, TX

County Guadalupe County, TX

The radar

The Austin/San Antonio radar (KEWX), 23 km from the middle of the area, began a volume at 09:17 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, 9.3 hours before the alert went out and 295 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-pSkew-T log-p diagram, Del Rio, TX at 00:00Z on 2017-03-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2145 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 00:00Z on 2017-03-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 150 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
2145 J/kg
Mixed-layer CIN
-130 J/kg
Mixed-layer LCL
1440 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
150 m²/s²
0-3 km storm-relative helicity
246 m²/s²
Significant tornado parameter
0.8
Supercell composite
16.9

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 Mar 29, 3:55 AM CDT, 21 minutes earlier.

Area forecast discussion, Mar 29, 3:55 AM CDT, 21 minutes before
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Hazardous weather outlook, Mar 28, 10:25 PM CDT, 5 hours 51 minutes before
Hazardous Weather Outlook...UPDATED
National Weather Service Austin/San Antonio TX
1025 PM CDT Tue Mar 28 2017

TXZ171>173-183>194-202>209-217>225-228-300330-
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-
1025 PM CDT Tue Mar 28 2017

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

.DAY ONE...Tonight.

There is a good chance for severe weather along and west of
Interstate 35 late tonight into Wednesday morning. Primary severe
concerns are for damaging winds and large hail. There is an
isolated threat for tornadoes, and a few areas may experience
heavy downpours of 1 to 2 inches.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Strong to marginally severe thunderstorms will remain possible
east of I-35 Wednesday morning, with damaging winds and large
hail being the primary threats.

Wednesday afternoon, gusty winds and low relative humidities are
expected to develop over the Southern Edwards Plateau, leading to
elevated to near critical fire weather conditions.

Saturday night into Sunday, another storm system is expected to
move into Texas and bring a potential for strong to severe
storms.

.SPOTTER INFORMATION STATEMENT...

Spotter reports are appreciated late tonight into Wednesday
morning as the line of storms move over the populated areas such
as the Hill Country and I-35 corridor.

In the hours before

Special weather statement, Mar 29, 1:14 AM CDT, 3 hours 2 minutes before
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Special weather statement, Mar 29, 2:22 AM CDT, 1 hour 54 minutes before
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Local storm report, Mar 29, 2:42 AM CDT, 1 hour 34 minutes before
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Special weather statement, Mar 29, 3:19 AM CDT, 57 minutes before
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Local storm report, Mar 29, 3:36 AM CDT, 40 minutes before
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Special weather statement, Mar 29, 4:16 AM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Mar 28, 7:38 PM CDTSevere Thunderstorm WarningEWXEdwards, Kinney52 min
Mar 28, 8:26 PM CDTSevere Thunderstorm WarningEWXEdwards, Real64 min
Mar 28, 8:54 PM CDTSevere Thunderstorm WarningEWXEdwards, Real66 min
Mar 28, 9:29 PM CDTSevere Thunderstorm WarningEWXEdwards, Kerr, Real35 min
Mar 28, 9:51 PM CDTSpecial Weather StatementEWXVal Verde54 min
Mar 28, 10:02 PM CDTSevere Thunderstorm WarningEWXEdwards, Kinney, Val Verde58 min
Mar 28, 10:59 PM CDTSpecial Weather StatementEWXBandera, Edwards, Gillespie, Kerr, Kinney, Medina and 2 more61 min
Mar 28, 11:04 PM CDTSevere Thunderstorm WarningEWXKinney, Maverick56 min
Mar 28, 11:25 PM CDTTornado WarningEWXKinney35 min
Mar 28, 11:32 PM CDTSevere Thunderstorm WarningEWXBandera, Edwards, Gillespie, Kerr, Real58 min
Mar 28, 11:47 PM CDTTornado WarningEWXKinney, Uvalde28 min
Mar 28, 11:55 PM CDTSevere Thunderstorm WarningEWXKinney, Maverick, Uvalde, Zavala65 min
Mar 29, 12:12 AM CDTSevere Thunderstorm WarningEWXBandera, Medina, Real, Uvalde63 min
Mar 29, 12:25 AM CDTSevere Thunderstorm WarningEWXBandera, Blanco, Burnet, Gillespie, Kendall, Kerr and 1 more52 min
Mar 29, 1:03 AM CDTSpecial Weather StatementEWXMaverick, Zavala72 min
Mar 29, 1:14 AM CDTSpecial Weather StatementEWXBexar, Blanco, Burnet, Comal, Hays, Kendall and 3 more61 min
Mar 29, 2:22 AM CDTSpecial Weather StatementEWXAtascosa, Bastrop, Bexar, Caldwell, Comal, Frio and 7 more68 min
Mar 29, 2:59 AM CDTAreal Flood AdvisoryEWXBexar2 hr
Mar 29, 3:19 AM CDTSpecial Weather StatementEWXAtascosa, Bastrop, Caldwell, DeWitt, Fayette, Gonzales and 5 more71 min
Mar 29, 3:21 AM CDTAreal Flood AdvisoryEWXTravis114 min
Mar 29, 3:43 AM CDTAreal Flood AdvisoryEWXBastrop, Caldwell3 hr
Mar 29, 5:22 AM CDTAreal Flood AdvisoryEWXGonzales, Guadalupe113 min
Mar 29, 5:25 AM CDTSpecial Weather StatementEWXFayette, Lee35 min
Mar 29, 6:20 AM CDTSpecial Weather StatementEWXLavaca40 min

Nearby

Special Weather Statements in Texas, 2017Every 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.