Alert archive / Texas / Tornado Watches in 2009

Tornado Watch 378

June 11, 200944 counties in Texas

The Storm Prediction Center issued this tornado watch at Jun 11, 2009, 2:32 PM CDT for 44 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Jun 11, 2009, 2:32 PM CDT (19:32 UTC)
Expired: Jun 11, 2009, 10:00 PM CDT
In force: 7 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2.5 in
Strongest gust expected: 60 kt

All 44 counties

Bastrop County, TX, Bell County, TX, Blanco County, TX, Bosque County, TX, Brown County, TX, Burnet County, TX, Caldwell County, TX, Callahan County, TX, Coleman County, TX, Comanche County, TX, Coryell County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Eastland County, TX, Erath County, TX, Falls County, TX, Fisher County, TX, Floyd County, TX, Garza County, TX, Hamilton County, TX, Haskell County, TX, Hays County, TX, Jones County, TX, Kent County, TX, King County, TX, Lampasas County, TX, Lee County, TX, Llano County, TX, McCulloch County, TX, McLennan County, TX, Milam County, TX, Mills County, TX, Motley County, TX, Nolan County, TX, Robertson County, TX, Runnels County, TX, San Saba County, TX, Shackelford County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX, Travis County, TX, Williamson County, TX

The radar

The Dyess AFB radar (KDYX), 68 km from the middle of the area, began a volume at 19:33 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: 50%
One or more EF2 to EF5 tornadoes: 20%
Ten or more severe wind reports: 40%
One or more gusts of 65 knots or more: 30%
Ten or more severe hail reports: 70%
One or more hailstones of 2 inches or more: 50%
Six or more combined severe hail and wind reports: 90%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 11, 2:51 PM CDT	Severe Thunderstorm Warning	SJT	Brown	24 min
Jun 11, 3:06 PM CDT	Severe Thunderstorm Warning	SJT	Callahan	39 min
Jun 11, 3:16 PM CDT	Severe Thunderstorm Warning	FWD	Eastland	74 min
Jun 11, 3:18 PM CDT	Severe Thunderstorm Warning	FWD	Comanche	57 min
Jun 11, 3:25 PM CDT	Tornado Warning	FWD	Eastland	50 min
Jun 11, 3:29 PM CDT	Severe Thunderstorm Warning	FWD	Eastland	76 min
Jun 11, 3:40 PM CDT	Tornado Warning	FWD	Eastland	50 min
Jun 11, 3:50 PM CDT	Severe Thunderstorm Warning	SJT	Callahan	40 min
Jun 11, 3:55 PM CDT	Tornado Warning	SJT	Brown	50 min
Jun 11, 4:14 PM CDT	Severe Thunderstorm Warning	FWD	Comanche	61 min
Jun 11, 4:24 PM CDT	Severe Thunderstorm Warning	FWD	Eastland	25 min
Jun 11, 4:46 PM CDT	Flash Flood Warning	FWD	Comanche	3 hr
Jun 11, 4:47 PM CDT	Severe Thunderstorm Warning	SJT	Brown	58 min
Jun 11, 4:57 PM CDT	Severe Thunderstorm Warning	FWD	Mills	63 min
Jun 11, 4:59 PM CDT	Severe Thunderstorm Warning	FWD	Hamilton	61 min
Jun 11, 5:11 PM CDT	Severe Thunderstorm Warning	FWD	Comanche	34 min
Jun 11, 5:15 PM CDT	Severe Thunderstorm Warning	SJT	Callahan	45 min
Jun 11, 5:37 PM CDT	Severe Thunderstorm Warning	FWD	Mills	53 min
Jun 11, 5:38 PM CDT	Severe Thunderstorm Warning	SJT	Brown, San Saba	67 min
Jun 11, 5:43 PM CDT	Severe Thunderstorm Warning	SJT	Callahan	24 min
Jun 11, 5:50 PM CDT	Severe Thunderstorm Warning	FWD	Eastland	55 min
Jun 11, 5:58 PM CDT	Severe Thunderstorm Warning	FWD	Coryell, Lampasas	92 min
Jun 11, 6:02 PM CDT	Severe Thunderstorm Warning	FWD	Hamilton	58 min
Jun 11, 6:06 PM CDT	Severe Thunderstorm Warning	SJT	McCulloch	54 min
Jun 11, 6:29 PM CDT	Flash Flood Warning	FWD	Coryell, Hamilton, Lampasas, Mills	3 hr
Jun 11, 6:30 PM CDT	Severe Thunderstorm Warning	FWD	Mills	60 min
Jun 11, 6:39 PM CDT	Severe Thunderstorm Warning	SJT	San Saba	66 min
Jun 11, 6:43 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Llano	62 min
Jun 11, 7:25 PM CDT	Tornado Warning	EWX	Burnet	35 min
Jun 11, 7:25 PM CDT	Severe Thunderstorm Warning	FWD	Lampasas	20 min
Jun 11, 7:39 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Travis, Williamson	66 min
Jun 11, 7:43 PM CDT	Tornado Warning	EWX	Burnet, Travis, Williamson	47 min
Jun 11, 7:51 PM CDT	Severe Thunderstorm Warning	EWX	Llano	39 min
Jun 11, 8:08 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Hays, Travis, Williamson	67 min
Jun 11, 8:09 PM CDT	Flash Flood Warning	EWX	Burnet, Llano, Williamson	111 min
Jun 11, 8:27 PM CDT	Tornado Warning	EWX	Travis, Williamson	33 min
Jun 11, 8:48 PM CDT	Severe Thunderstorm Warning	FWD	Lampasas	39 min
Jun 11, 9:03 PM CDT	Flash Flood Warning	EWX	Travis, Williamson	3 hr
Jun 11, 9:08 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Lee, Travis, Williamson	67 min
Jun 11, 9:33 PM CDT	Severe Thunderstorm Warning	SJT	San Saba	27 min
Jun 11, 9:36 PM CDT	Severe Thunderstorm Warning	EWX	Caldwell, Comal, Guadalupe, Hays, Travis	54 min
Jun 11, 9:58 PM CDT	Severe Thunderstorm Warning	EWX	Llano	51 min
Jun 11, 9:58 PM CDT	Severe Thunderstorm Warning	SJT	San Saba	32 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

Fort Worth, TX (KFWD), launched 12:00Z, 7.5 hours before the alert went out and 253 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: 1544 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 556 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 544 m²/s²
0-3 km storm-relative helicity: 715 m²/s²
Significant tornado parameter: 3.1
Supercell composite: 55.5

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 10, 8:39 PM CDT	Mesoscale Discussion	SPC	Bosque, Bowie, Camp, Cass, Collin, Dallas and 29 more	66 min
Jun 10, 11:07 PM CDT	Mesoscale Discussion	SPC	Bowie, Cass, Harrison, Marion, Morris, Nacogdoches and 2 more	83 min
Jun 10, 11:49 PM CDT	Severe Thunderstorm Watch	SPC	Nacogdoches, Shelby	5 hr
Jun 11, 2:55 AM CDT	Mesoscale Discussion	SPC	Cherokee, Dallas, Ellis, Henderson, Kaufman, Navarro and 5 more	65 min
Jun 11, 3:11 AM CDT	Severe Thunderstorm Watch	SPC	Anderson, Cherokee, Collin, Dallas, Denton, Ellis and 15 more	7 hr
Jun 11, 5:22 AM CDT	Mesoscale Discussion	SPC	Anderson, Angelina, Cherokee, Dallas, Denton, Ellis and 29 more	53 min
Jun 11, 5:42 AM CDT	Severe Thunderstorm Watch	SPC	Angelina, Freestone, Hardin, Houston, Leon, Limestone and 6 more	4 hr
Jun 11, 7:39 AM CDT	Mesoscale Discussion	SPC	Anderson, Collin, Dallas, Denton, Ellis, Henderson and 16 more	66 min
Jun 11, 7:55 AM CDT	Mesoscale Discussion	SPC	Angelina, Hardin, Houston, Polk, San Jacinto, Trinity and 2 more	65 min
Jun 11, 10:10 AM CDT	Severe Thunderstorm Watch	SPC	Anderson, Angelina, Bosque, Brazos, Cherokee, Collin and 41 more	8 hr
Jun 11, 1:10 PM CDT	Mesoscale Discussion	SPC	Anderson, Angelina, Bosque, Cherokee, Collin, Dallas and 37 more	65 min
Jun 11, 2:05 PM CDT	Mesoscale Discussion	SPC	Bell, Brown, Burnet, Callahan, Coleman, Comanche and 25 more	55 min
Jun 11, 3:43 PM CDT	Mesoscale Discussion	SPC	Armstrong, Carson, Donley, Gray, Hemphill, Hutchinson and 4 more	92 min
Jun 11, 5:41 PM CDT	Mesoscale Discussion	SPC	Anderson, Bell, Blanco, Bosque, Brazos, Brown and 53 more	64 min

Nearby

Tornado Watches in Texas, 2009 Every 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.