Alert archive / Texas / Tornado Watches in 2009

Tornado Watch 196

April 26, 200936 counties in Texas

The Storm Prediction Center issued this tornado watch at Apr 26, 2009, 8:04 PM CDT for 36 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Apr 26, 2009, 8:04 PM CDT (01:04 UTC)
Expired
Apr 27, 2009, 2:49 AM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
3 in
Strongest gust expected
60 kt
All 36 counties

Blanco County, TX, Brown County, TX, Burnet County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crockett County, TX, Edwards County, TX, Fisher County, TX, Gillespie County, TX, Glasscock County, TX, Haskell County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kerr County, TX, Kimble County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Mitchell County, TX, Nolan County, TX, Reagan County, TX, Real County, TX, Runnels County, TX, San Saba County, TX, Schleicher County, TX, Scurry County, TX, Shackelford County, TX, Sterling County, TX, Sutton County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX

The radar

The San Angelo radar (KSJT), 55 km from the middle of the area, began a volume at 01:06 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
30%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
50%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 26, 8:13 PM CDTSevere Thunderstorm WarningSJTCrockett, Schleicher, Sutton47 min
Apr 26, 8:30 PM CDTTornado WarningSJTSutton45 min
Apr 26, 8:49 PM CDTSevere Thunderstorm WarningSJTKimble, Menard, Schleicher, Sutton56 min
Apr 26, 9:12 PM CDTSevere Thunderstorm WarningMAFReagan63 min
Apr 26, 9:12 PM CDTTornado WarningSJTKimble, Sutton48 min
Apr 26, 9:18 PM CDTSevere Thunderstorm WarningSJTCrockett57 min
Apr 26, 9:39 PM CDTSevere Thunderstorm WarningSJTKimble, Mason, Sutton51 min
Apr 26, 9:42 PM CDTTornado WarningEWXEdwards33 min
Apr 26, 9:43 PM CDTSevere Thunderstorm WarningSJTCrockett32 min
Apr 26, 9:58 PM CDTTornado WarningSJTKimble, Sutton32 min
Apr 26, 10:13 PM CDTTornado WarningEWXEdwards, Kerr32 min
Apr 26, 10:28 PM CDTSevere Thunderstorm WarningSJTKimble, Sutton47 min
Apr 26, 10:34 PM CDTTornado WarningSJTKimble41 min
Apr 26, 10:42 PM CDTSevere Thunderstorm WarningEWXEdwards, Kerr48 min
Apr 26, 11:17 PM CDTSevere Thunderstorm WarningSJTKimble, Mason58 min
Apr 26, 11:27 PM CDTFlash Flood WarningSJTKimble4 hr
Apr 26, 11:51 PM CDTSevere Thunderstorm WarningMAFReagan24 min
Apr 27, 12:11 AM CDTSevere Thunderstorm WarningEWXGillespie49 min
Apr 27, 12:14 AM CDTSevere Thunderstorm WarningSJTIrion, Sterling, Tom Green46 min
Apr 27, 12:15 AM CDTSevere Thunderstorm WarningSJTKimble, Mason60 min
Apr 27, 12:46 AM CDTSevere Thunderstorm WarningSJTTom Green44 min
Apr 27, 1:04 AM CDTSevere Thunderstorm WarningSJTIrion, Sterling, Tom Green41 min
Apr 27, 1:27 AM CDTSevere Thunderstorm WarningSJTTom Green48 min
Apr 27, 1:46 AM CDTSevere Thunderstorm WarningMAFGlasscock, Midland59 min
Apr 27, 1:51 AM CDTSevere Thunderstorm WarningSJTCoke, Sterling, Tom Green39 min
Apr 27, 2:29 AM CDTSevere Thunderstorm WarningSJTCoke, Sterling, Tom Green46 min
Apr 27, 2:42 AM CDTFlash Flood WarningSJTCoke, Sterling, Tom Green4 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 00:00Z, 1.1 hours before the alert went out and 172 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 2009-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1875 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 00:00Z on 2009-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 156 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
1875 J/kg
Mixed-layer CIN
-172 J/kg
Mixed-layer LCL
1845 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
156 m²/s²
0-3 km storm-relative helicity
354 m²/s²
Significant tornado parameter
0.1
Supercell composite
5.6

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 26, 8:42 PM CDTMesoscale DiscussionSPCArcher, Baylor, Childress, Clay, Collingsworth, Cottle and 14 more2 hr
Apr 26, 10:46 PM CDTMesoscale DiscussionSPCBlanco, Brown, Callahan, Coke, Coleman, Concho and 22 more119 min
Apr 27, 1:49 AM CDTMesoscale DiscussionSPCBrown, Callahan, Coke, Coleman, Concho, Crockett and 24 more86 min
Apr 27, 2:44 AM CDTSevere Thunderstorm WatchSPCBrown, Callahan, Coke, Coleman, Concho, Crockett and 23 more7 hr
Apr 27, 5:36 AM CDTMesoscale DiscussionSPCBosque, Brown, Coke, Comanche, Concho, Coryell and 17 more84 min
Apr 27, 6:08 AM CDTTornado WatchSPCAnderson, Bastrop, Bell, Blanco, Bosque, Brazos and 33 more7 hr
Apr 27, 7:43 AM CDTMesoscale DiscussionSPCCoke, Concho, Crockett, Irion, Kimble, McCulloch and 8 more92 min
Apr 27, 7:55 AM CDTSevere Thunderstorm WatchSPCBandera, Bexar, Comal, Edwards, Frio, Guadalupe and 9 more5 hr
Apr 27, 8:59 AM CDTMesoscale DiscussionSPCAnderson, Angelina, Bell, Brazos, Burleson, Burnet and 38 more91 min
Apr 27, 9:28 AM CDTSevere Thunderstorm WatchSPCBowie, Camp, Cass, Cherokee, Franklin, Gregg and 12 more12 hr
Apr 27, 11:42 AM CDTMesoscale DiscussionSPCAnderson, Bastrop, Bell, Blanco, Brazos, Burleson and 19 more63 min
Apr 27, 12:00 PM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bexar, Comal, Edwards, Kendall and 6 more60 min
Apr 27, 1:14 PM CDTMesoscale DiscussionSPCBowie, Camp, Cass, Gregg, Harrison, Marion and 8 more91 min
Apr 27, 2:24 PM CDTMesoscale DiscussionSPCAngelina, Bowie, Cass, Cherokee, Gregg, Harrison and 10 more66 min
Apr 27, 2:57 PM CDTSevere Thunderstorm WatchSPCBowie, Cass, Harrison, Marion, Panola, Shelby6 hr
Apr 27, 3:50 PM CDTMesoscale DiscussionSPCAransas, Austin, Bee, Brazoria, Calhoun, Chambers and 20 more85 min
Apr 27, 3:58 PM CDTTornado WatchSPCBrazoria, Calhoun, Chambers, Colorado, DeWitt, Fort Bend and 10 more5 hr
Apr 27, 5:59 PM CDTMesoscale DiscussionSPCBorden, Dawson, Fisher, Garza, Kent, Lynn and 4 more2 hr
Apr 27, 6:30 PM CDTMesoscale DiscussionSPCAransas, Brazoria, Calhoun, Chambers, Galveston, Hardin and 4 more2 hr

Nearby

Tornado Watches in Texas, 2009Every tornado watch in 2009

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.