Alert archive / Texas / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 557

November 22, 201435 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Nov 22, 2014, 3:06 PM CST for 35 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Nov 22, 2014, 3:06 PM CST (21:06 UTC)
Expired
Nov 22, 2014, 10:00 PM CST
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 35 counties

Atascosa County, TX, Bee County, TX, Bexar County, TX, Brooks County, TX, Cameron County, TX, DeWitt County, TX, Dimmit County, TX, Duval County, TX, Edwards County, TX, Frio County, TX, Goliad County, TX, Gonzales County, TX, Guadalupe County, TX, Hidalgo County, TX, Jim Hogg County, TX, Jim Wells County, TX, Karnes County, TX, Kenedy County, TX, Kinney County, TX, La Salle County, TX, Lavaca County, TX, Live Oak County, TX, Maverick County, TX, McMullen County, TX, Medina County, TX, Real County, TX, Starr County, TX, Uvalde County, TX, Val Verde County, TX, Victoria County, TX, Webb County, TX, Willacy County, TX, Wilson County, TX, Zapata County, TX, Zavala County, TX

The radar

The Laughlin AFB radar (KDFX), 99 km from the middle of the area, began a volume at 21:07 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
20%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
40%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

18 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Nov 22, 4:07 PM CSTSevere Thunderstorm WarningEWXKinney, Maverick, Val Verde53 min
Nov 22, 4:48 PM CSTSevere Thunderstorm WarningEWXKinney, Maverick, Uvalde, Zavala57 min
Nov 22, 4:53 PM CSTSevere Thunderstorm WarningBROZapata52 min
Nov 22, 5:27 PM CSTSevere Thunderstorm WarningEWXBandera, Edwards, Medina, Real, Uvalde44 min
Nov 22, 5:30 PM CSTSevere Thunderstorm WarningBROJim Hogg, Zapata45 min
Nov 22, 5:55 PM CSTSevere Thunderstorm WarningEWXMaverick, Zavala50 min
Nov 22, 6:11 PM CSTSevere Thunderstorm WarningBROJim Hogg49 min
Nov 22, 6:15 PM CSTSevere Thunderstorm WarningEWXDimmit, Maverick60 min
Nov 22, 6:34 PM CSTSevere Thunderstorm WarningEWXDimmit, Zavala56 min
Nov 22, 6:53 PM CSTSevere Thunderstorm WarningBROStarr52 min
Nov 22, 7:55 PM CSTFlash Flood WarningEWXBexar3 hr
Nov 22, 8:01 PM CSTSevere Thunderstorm WarningEWXBexar, Comal, Guadalupe, Karnes, Wilson59 min
Nov 22, 8:08 PM CSTSevere Thunderstorm WarningEWXAtascosa, Karnes, Wilson52 min
Nov 22, 8:09 PM CSTSevere Thunderstorm WarningCRPLa Salle, McMullen35 min
Nov 22, 8:12 PM CSTFlash Flood WarningEWXComal, Guadalupe3 hr
Nov 22, 8:25 PM CSTSevere Thunderstorm WarningCRPBee, Live Oak, McMullen21 min
Nov 22, 8:43 PM CSTSevere Thunderstorm WarningEWXCaldwell, Comal, DeWitt, Gonzales, Guadalupe, Hays and 2 more62 min
Nov 22, 9:28 PM CSTSevere Thunderstorm WarningEWXBastrop, Caldwell, DeWitt, Fayette, Gonzales, Lavaca62 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Del Rio, TX (KDLF), launched 12:00Z, 9.1 hours before the alert went out and 143 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 12:00Z on 2014-11-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1655 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 12:00Z on 2014-11-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 215 square meters per square second.19395878Sfc1 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
1655 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
480 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
215 m²/s²
0-3 km storm-relative helicity
359 m²/s²
Significant tornado parameter
1.6
Supercell composite
7.6

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 21, 11:33 PM CSTMesoscale DiscussionSPCBosque, Comanche, Cooke, Coryell, Dallas, Denton and 16 more57 min
Nov 22, 1:45 PM CSTMesoscale DiscussionSPCBrooks, Dimmit, Duval, Edwards, Frio, Hidalgo and 12 more60 min
Nov 22, 5:31 PM CSTMesoscale DiscussionSPCBandera, Brooks, Cameron, Dimmit, Duval, Edwards and 17 more59 min

Nearby

Severe Thunderstorm Watches in Texas, 2014Every severe thunderstorm watch in 2014

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.