Alert archive / Texas / Tornado Watches in 2007

Tornado Watch 179

April 24, 200749 counties in Texas

The Storm Prediction Center issued this tornado watch at Apr 24, 2007, 3:58 PM CDT for 49 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Apr 24, 2007, 3:58 PM CDT (20:58 UTC)
Expired: Apr 24, 2007, 10:53 PM CDT
In force: 7 hr
Issued by: the Storm Prediction Center
Particularly dangerous situation: Yes
Largest hail expected: 3.5 in
Strongest gust expected: 70 kt

All 49 counties

Anderson County, TX, Bandera County, TX, Bell County, TX, Bexar County, TX, Blanco County, TX, Brown County, TX, Burnet County, TX, Coleman County, TX, Comal County, TX, Comanche County, TX, Concho County, TX, Coryell County, TX, Crockett County, TX, Dimmit County, TX, Edwards County, TX, Falls County, TX, Freestone County, TX, Frio County, TX, Gillespie County, TX, Hamilton County, TX, Hays County, TX, Irion County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, Lampasas County, TX, Leon County, TX, Limestone County, TX, Llano County, TX, Mason County, TX, Maverick County, TX, McCulloch County, TX, McLennan County, TX, Medina County, TX, Menard County, TX, Milam County, TX, Mills County, TX, Real County, TX, Robertson County, TX, San Saba County, TX, Schleicher County, TX, Sutton County, TX, Tom Green County, TX, Travis County, TX, Uvalde County, TX, Val Verde County, TX, Williamson County, TX, Zavala County, TX

The radar

The Laughlin AFB radar (KDFX), 76 km from the middle of the area, began a volume at 20:58 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: 80%
One or more EF2 to EF5 tornadoes: 50%
Ten or more severe wind reports: 95%
One or more gusts of 65 knots or more: 40%
Ten or more severe hail reports: 95%
One or more hailstones of 2 inches or more: 70%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Apr 24, 4:04 PM CDT	Severe Thunderstorm Warning	SJT	Coleman, McCulloch	41 min
Apr 24, 4:26 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	64 min
Apr 24, 4:39 PM CDT	Severe Thunderstorm Warning	SJT	Brown	51 min
Apr 24, 5:19 PM CDT	Severe Thunderstorm Warning	SJT	Schleicher	26 min
Apr 24, 5:22 PM CDT	Severe Thunderstorm Warning	FWD	Comanche	53 min
Apr 24, 5:25 PM CDT	Severe Thunderstorm Warning	SJT	Concho, Tom Green	50 min
Apr 24, 5:27 PM CDT	Severe Thunderstorm Warning	SJT	Brown	17 min
Apr 24, 5:39 PM CDT	Severe Thunderstorm Warning	SJT	Coleman	36 min
Apr 24, 5:39 PM CDT	Tornado Warning	SJT	Concho, Tom Green	36 min
Apr 24, 5:50 PM CDT	Severe Thunderstorm Warning	SJT	Crockett, Sutton	25 min
Apr 24, 6:06 PM CDT	Severe Thunderstorm Warning	SJT	Brown, Coleman	24 min
Apr 24, 6:07 PM CDT	Severe Thunderstorm Warning	SJT	Menard, Schleicher	23 min
Apr 24, 6:13 PM CDT	Tornado Warning	SJT	Coleman, Concho, McCulloch	47 min
Apr 24, 6:15 PM CDT	Severe Thunderstorm Warning	SJT	Schleicher, Sutton	45 min
Apr 24, 6:18 PM CDT	Severe Thunderstorm Warning	EWX	Maverick	57 min
Apr 24, 6:21 PM CDT	Severe Thunderstorm Warning	SJT	Concho, Menard, Schleicher	24 min
Apr 24, 6:28 PM CDT	Severe Thunderstorm Warning	SJT	Brown	47 min
Apr 24, 6:46 PM CDT	Severe Thunderstorm Warning	SJT	Concho, McCulloch	29 min
Apr 24, 6:48 PM CDT	Tornado Warning	SJT	Brown	27 min
Apr 24, 6:51 PM CDT	Tornado Warning	EWX	Maverick	54 min
Apr 24, 6:59 PM CDT	Severe Thunderstorm Warning	SJT	Brown, McCulloch, San Saba	46 min
Apr 24, 7:00 PM CDT	Severe Thunderstorm Warning	SJT	Menard, Schleicher	30 min
Apr 24, 7:13 PM CDT	Severe Thunderstorm Warning	FWD	Comanche	62 min
Apr 24, 7:14 PM CDT	Severe Thunderstorm Warning	SJT	McCulloch, San Saba	31 min
Apr 24, 7:14 PM CDT	Tornado Warning	SJT	Brown	31 min
Apr 24, 7:25 PM CDT	Severe Thunderstorm Warning	FWD	Mills	65 min
Apr 24, 7:26 PM CDT	Severe Thunderstorm Warning	SJT	Menard	34 min
Apr 24, 7:33 PM CDT	Tornado Warning	EWX	Dimmit	57 min
Apr 24, 7:37 PM CDT	Severe Thunderstorm Warning	EWX	Zavala	53 min
Apr 24, 7:40 PM CDT	Severe Thunderstorm Warning	SJT	McCulloch, San Saba	50 min
Apr 24, 8:01 PM CDT	Severe Thunderstorm Warning	SJT	McCulloch, Mason, Menard	29 min
Apr 24, 8:13 PM CDT	Severe Thunderstorm Warning	FWD	Comanche, Hamilton	62 min
Apr 24, 8:25 PM CDT	Severe Thunderstorm Warning	SJT	McCulloch, San Saba	65 min
Apr 24, 8:26 PM CDT	Tornado Warning	EWX	Dimmit	34 min
Apr 24, 8:33 PM CDT	Severe Thunderstorm Warning	EWX	Frio, Zavala	57 min
Apr 24, 9:11 PM CDT	Severe Thunderstorm Warning	EWX	Uvalde	64 min
Apr 24, 9:29 PM CDT	Severe Thunderstorm Warning	EWX	Maverick	31 min
Apr 24, 9:46 PM CDT	Severe Thunderstorm Warning	EWX	Uvalde, Zavala	59 min
Apr 24, 10:07 PM CDT	Severe Thunderstorm Warning	EWX	Maverick	53 min
Apr 24, 10:21 PM CDT	Flash Flood Warning	EWX	Maverick, Uvalde, Zavala	4 hr

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 (KDRT), launched 12:00Z, 9.0 hours before the alert went out and 91 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: 2517 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 526 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 203 m²/s²
0-3 km storm-relative helicity: 223 m²/s²
Significant tornado parameter: 2.9
Supercell composite: 10.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 23, 7:05 PM CDT	Mesoscale Discussion	SPC	Armstrong, Baylor, Borden, Briscoe, Callahan, Carson and 46 more	115 min
Apr 23, 7:48 PM CDT	Tornado Watch	SPC	Edwards, Kinney, Maverick, Real, Uvalde, Val Verde and 1 more	105 min
Apr 23, 9:17 PM CDT	Mesoscale Discussion	SPC	Kinney, Uvalde	118 min
Apr 23, 10:22 PM CDT	Mesoscale Discussion	SPC	Baylor, Callahan, Coke, Cottle, Crosby, Dickens and 18 more	83 min
Apr 24, 7:29 AM CDT	Mesoscale Discussion	SPC	Crockett, Glasscock, Irion, Reagan, Sterling, Upton	91 min
Apr 24, 11:23 AM CDT	Tornado Watch	SPC	Archer, Baylor, Clay, Wichita	9 hr
Apr 24, 11:28 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Clay, Coke and 33 more	2 hr
Apr 24, 11:49 AM CDT	Tornado Watch	SPC	Brown, Callahan, Coke, Coleman, Collin, Comanche and 35 more	11 hr
Apr 24, 12:40 PM CDT	Mesoscale Discussion	SPC	Bosque, Collin, Coryell, Dallas, Delta, Denton and 23 more	2 hr
Apr 24, 2:40 PM CDT	Tornado Watch	SPC	Bosque, Bowie, Camp, Cass, Delta, Ellis and 21 more	8 hr
Apr 24, 6:16 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Wichita	119 min
Apr 24, 6:44 PM CDT	Mesoscale Discussion	SPC	Bandera, Bell, Bexar, Blanco, Bosque, Brown and 39 more	2 hr

Nearby

Tornado Watches in Texas, 2007 Every tornado watch in 2007

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.