Alert archive / Texas / Special Weather Statements in 2017

Special Weather Statement, NWS Austin/San Antonio, TX

May 30, 2017Val Verde County, Texas

NWS Austin/San Antonio, TX issued this special weather statement at May 30, 2017, 12:34 PM CDT for Val Verde County, Texas. It was in force for 41 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 30, 2017, 12:34 PM CDT (17:34 UTC)
Expired: May 30, 2017, 1:15 PM CDT
In force: 41 min
Issued by: NWS Austin/San Antonio, TX

County Val Verde County, TX

The radar

The Laughlin AFB radar (KDFX), 82 km from the middle of the area, began a volume at 17:36 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 12:00Z, 5.6 hours before the alert went out and 55 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: 1070 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 762 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 May 30, 11:15 AM CDT, 1 hour 19 minutes earlier.

Area forecast discussion, May 30, 11:15 AM CDT, 1 hour 19 minutes before

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Hazardous weather outlook, May 30, 4:01 AM CDT, 8 hours 33 minutes before

Hazardous Weather Outlook
National Weather Service Austin/San Antonio TX
401 AM CDT Tue May 30 2017

TXZ171>173-183>194-202>209-217>225-228-310915-
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-
401 AM CDT Tue May 30 2017

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

.DAY ONE...Today And Tonight.

Isolated to scattered showers and thunderstorms are forecast
through tonight with isolated heavy downpours up to 1 inch
possible across parts of the southern Edwards Plateau and Rio
Grande. Localized flash flooding can't be ruled out.

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

There will be continued chances for showers and thunderstorms
Wednesday through Monday. Best rain chances can be expected
Wednesday into Thursday, when locally heavy rainfall and a few
strong storms are possible especially across the southwest
counties.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

In the hours before

Local storm report, May 30, 7:29 AM CDT, 5 hours 5 minutes before

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Special weather statement, May 30, 8:05 AM CDT, 4 hours 29 minutes before

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Local storm report, May 30, 9:11 AM CDT, 3 hours 23 minutes before

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Special weather statement, May 30, 12:34 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Austin/San Antonio TX
1234 PM CDT TUE MAY 30 2017

TXZ183-301815-
Val Verde TX-
1234 PM CDT TUE MAY 30 2017

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN VAL VERDE COUNTY UNTIL
115 PM CDT...

At 1233 PM CDT, Doppler radar was tracking a strong thunderstorm near
Loma Alta, moving northeast at 10 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Loma Alta.

LAT...LON 2990 10083 2996 10070 2976 10070 2981 10085
TIME...MOT...LOC 1733Z 218DEG 7KT 2986 10081

ZEITLER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 8:32 PM CDT	Areal Flood Advisory	EWX	Bandera, Kerr	118 min
May 29, 9:37 PM CDT	Special Weather Statement	EWX	Kendall	23 min
May 30, 8:05 AM CDT	Special Weather Statement	EWX	Val Verde	85 min
May 30, 12:51 PM CDT	Areal Flood Advisory	EWX	Val Verde	4 hr
May 30, 2:44 PM CDT	Special Weather Statement	EWX	Medina	46 min
May 30, 3:18 PM CDT	Special Weather Statement	EWX	Bexar	42 min
May 30, 3:39 PM CDT	Areal Flood Advisory	EWX	Bexar	3 hr
May 30, 3:56 PM CDT	Special Weather Statement	EWX	Bexar	49 min
May 30, 4:35 PM CDT	Special Weather Statement	EWX	Wilson	25 min
May 30, 4:53 PM CDT	Severe Thunderstorm Warning	EWX	Bexar, Wilson	52 min
May 30, 4:58 PM CDT	Areal Flood Advisory	EWX	Bexar, Wilson	2 hr
May 30, 5:36 PM CDT	Severe Thunderstorm Warning	EWX	Gonzales, Karnes, Wilson	26 min
May 30, 5:44 PM CDT	River Flood Warning	EWX	Val Verde	14 hr
May 30, 6:43 PM CDT	Areal Flood Advisory	EWX	Bexar, Wilson	62 min

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.