Alert archive / Texas / Severe Thunderstorm Watches in 2007

Severe Thunderstorm Watch 455

June 26, 200717 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Jun 26, 2007, 11:33 PM CDT for 17 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jun 26, 2007, 11:33 PM CDT (04:33 UTC)
Expired
Jun 27, 2007, 5:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
70 kt

Counties Brewster County, TX, Coke County, TX, Crockett County, TX, Edwards County, TX, Fisher County, TX, Irion County, TX, Jeff Davis County, TX, Kinney County, TX, Nolan County, TX, Pecos County, TX, Presidio County, TX, Schleicher County, TX, Sterling County, TX, Sutton County, TX, Terrell County, TX, Tom Green County, TX, Val Verde County, TX

The radar

The Midland/Odessa radar (KMAF), 176 km from the middle of the area, began a volume at 04:36 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.

What SPC expected

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

Two or more tornadoes
10%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
80%
One or more gusts of 65 knots or more
60%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 27, 12:33 AM CDTSevere Thunderstorm WarningMAFPecos57 min
Jun 27, 12:47 AM CDTSevere Thunderstorm WarningSJTIrion, Sterling, Tom Green58 min
Jun 27, 12:47 AM CDTSevere Thunderstorm WarningSJTCrockett58 min
Jun 27, 1:10 AM CDTSevere Thunderstorm WarningSJTFisher, Nolan65 min
Jun 27, 1:23 AM CDTFlash Flood WarningSJTCallahan, Fisher, Jones, Nolan, Shackelford, Taylor4 hr
Jun 27, 1:26 AM CDTSevere Thunderstorm WarningMAFPecos64 min
Jun 27, 1:39 AM CDTSevere Thunderstorm WarningSJTCoke, Irion, Sterling, Tom Green66 min
Jun 27, 1:40 AM CDTSevere Thunderstorm WarningSJTCrockett65 min
Jun 27, 1:48 AM CDTSevere Thunderstorm WarningMAFJeff Davis57 min
Jun 27, 2:12 AM CDTSevere Thunderstorm WarningSJTCoke, Concho, Runnels, Tom Green63 min
Jun 27, 2:24 AM CDTSevere Thunderstorm WarningMAFTerrell66 min
Jun 27, 2:29 AM CDTSevere Thunderstorm WarningMAFPecos61 min
Jun 27, 2:32 AM CDTSevere Thunderstorm WarningSJTSchleicher, Sutton58 min
Jun 27, 2:41 AM CDTSevere Thunderstorm WarningSJTCrockett64 min
Jun 27, 2:42 AM CDTSevere Thunderstorm WarningSJTIrion, Tom Green33 min
Jun 27, 3:38 AM CDTSevere Thunderstorm WarningEWXVal Verde82 min
Jun 27, 4:53 AM CDTSevere Thunderstorm WarningEWXKinney, Val Verde82 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

Midland Regional, TX (KMAF), launched 00:00Z, 4.6 hours before the alert went out and 177 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, Midland Regional, TX at 00:00Z on 2007-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2399 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, Midland Regional, TX at 00:00Z on 2007-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 square meters per square second.1939Sfc1 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
2399 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
1715 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
233 m²/s²
Significant tornado parameter
0.0
Supercell composite
7.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 26, 7:53 PM CDTMesoscale DiscussionSPCBell, Coryell, Falls, Freestone, Henderson, Kaufman and 10 more3 hr
Jun 26, 8:32 PM CDTMesoscale DiscussionSPCAndrews, Bailey, Borden, Briscoe, Cochran, Crane and 32 more118 min
Jun 26, 8:57 PM CDTMesoscale DiscussionSPCArmstrong, Dallam, Deaf Smith, Hartley, Oldham, Sherman2 hr
Jun 26, 11:08 PM CDTMesoscale DiscussionSPCAndrews, Borden, Brewster, Crane, Crockett, Culberson and 21 more97 min
Jun 27, 2:03 AM CDTMesoscale DiscussionSPCCallahan, Coleman, Concho, Gillespie, Jones, Kimble and 8 more87 min
Jun 27, 2:21 AM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bexar, Brewster, Crockett, Dimmit and 18 more84 min
Jun 27, 4:35 AM CDTMesoscale DiscussionSPCBandera, Edwards, Kerr, Kimble, Kinney, Medina and 4 more85 min
Jun 27, 2:49 PM CDTMesoscale DiscussionSPCAnderson, Bell, Bosque, Collin, Cooke, Coryell and 33 more116 min

Nearby

Severe Thunderstorm Watches in Texas, 2007Every severe thunderstorm 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.