Alert archive / Texas / Tornado Watches in 2007
Tornado Watch 58
The Storm Prediction Center issued this tornado watch at Mar 11, 2007, 5:16 PM CDT for 43 counties in Texas. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 11, 2007, 5:16 PM CDT (22:16 UTC)
- Expired
- Mar 12, 2007, 1:00 AM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 70 kt
All 43 counties
Atascosa County, TX, Bandera County, TX, Bell County, TX, Bexar County, TX, Blanco County, TX, Brown County, TX, Burnet County, TX, Callahan County, TX, Coleman County, TX, Comal County, TX, Comanche County, TX, Concho County, TX, Coryell County, TX, Dimmit County, TX, Eastland County, TX, Erath County, TX, Frio County, TX, Gillespie County, TX, Guadalupe County, TX, Hamilton County, TX, Hays County, TX, Karnes County, TX, Kendall County, TX, Kerr County, TX, La Salle County, TX, Lampasas County, TX, Live Oak County, TX, Llano County, TX, Mason County, TX, Maverick County, TX, McCulloch County, TX, McMullen County, TX, Medina County, TX, Mills County, TX, Nolan County, TX, Runnels County, TX, San Saba County, TX, Taylor County, TX, Travis County, TX, Uvalde County, TX, Williamson County, TX, Wilson County, TX, Zavala County, TX
The radar
The San Angelo radar (KSJT), 145 km from the middle of the area, began a volume at 22:19 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
- 40%
- 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
- 50%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
25 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 11, 5:54 PM CDT | Severe Thunderstorm Warning | SJT | Coke, Runnels, Tom Green | 51 min |
| Mar 11, 5:56 PM CDT | Severe Thunderstorm Warning | EWX | Kerr | 28 min |
| Mar 11, 6:26 PM CDT | Severe Thunderstorm Warning | SJT | Concho, McCulloch, Menard | 20 min |
| Mar 11, 6:42 PM CDT | Tornado Warning | EWX | Blanco, Gillespie | 33 min |
| Mar 11, 6:43 PM CDT | Severe Thunderstorm Warning | SJT | Coleman, McCulloch | 36 min |
| Mar 11, 7:12 PM CDT | Severe Thunderstorm Warning | EWX | Blanco, Burnet | 63 min |
| Mar 11, 7:55 PM CDT | Flash Flood Warning | EWX | Comal, Kendall | 3 hr |
| Mar 11, 7:57 PM CDT | Flash Flood Warning | EWX | Burnet | 3 hr |
| Mar 11, 8:07 PM CDT | Flash Flood Warning | EWX | Travis | 3 hr |
| Mar 11, 8:13 PM CDT | Tornado Warning | EWX | Bexar, Comal | 32 min |
| Mar 11, 8:19 PM CDT | Severe Thunderstorm Warning | EWX | Travis | 41 min |
| Mar 11, 8:20 PM CDT | Severe Thunderstorm Warning | EWX | Gillespie | 55 min |
| Mar 11, 8:30 PM CDT | Severe Thunderstorm Warning | EWX | Williamson | 60 min |
| Mar 11, 8:45 PM CDT | Tornado Warning | EWX | Comal | 30 min |
| Mar 11, 9:12 PM CDT | Tornado Warning | EWX | Comal | 33 min |
| Mar 11, 9:36 PM CDT | Flash Flood Warning | EWX | Bandera, Kerr, Real | 3 hr |
| Mar 11, 9:55 PM CDT | Flash Flood Warning | EWX | Burnet, Llano | 2 hr |
| Mar 11, 10:20 PM CDT | Flash Flood Warning | EWX | Caldwell, Guadalupe | 3 hr |
| Mar 11, 10:20 PM CDT | Flash Flood Warning | EWX | Blanco, Hays | 3 hr |
| Mar 11, 10:37 PM CDT | Flash Flood Warning | EWX | Bexar, Medina, Uvalde | 3 hr |
| Mar 11, 10:45 PM CDT | Severe Thunderstorm Warning | EWX | Maverick | 60 min |
| Mar 11, 10:59 PM CDT | Flash Flood Warning | EWX | Bastrop, Travis | 3 hr |
| Mar 11, 11:03 PM CDT | Flash Flood Warning | EWX | Comal, Kendall | 3 hr |
| Mar 11, 11:09 PM CDT | Severe Thunderstorm Warning | EWX | Dimmit, Maverick | 66 min |
| Mar 12, 12:30 AM CDT | Severe Thunderstorm Warning | EWX | Bexar | 45 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 (KDRT), launched 12:00Z, 10.3 hours before the alert went out and 202 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.
- Mixed-layer CAPE
- 449 J/kg
- Mixed-layer CIN
- -247 J/kg
- Mixed-layer LCL
- 575 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 11, 3:29 AM CDT | Mesoscale Discussion | SPC | Clay, Wichita, Wilbarger | 91 min |
| Mar 11, 10:18 AM CDT | Mesoscale Discussion | SPC | Borden, Coke, Dawson, Garza, Glasscock, Howard and 13 more | 87 min |
| Mar 11, 1:58 PM CDT | Tornado Watch | SPC | Brewster, Coke, Crane, Crockett, Edwards, Irion and 13 more | 7 hr |
| Mar 11, 2:25 PM CDT | Mesoscale Discussion | SPC | Archer, Clay, Collin, Cooke, Denton, Fannin and 10 more | 95 min |
| Mar 11, 4:50 PM CDT | Mesoscale Discussion | SPC | Bandera, Bell, Bexar, Blanco, Bosque, Brown and 33 more | 85 min |
| Mar 11, 5:27 PM CDT | Mesoscale Discussion | SPC | Concho, Crockett, Edwards, Irion, Kimble, Menard and 7 more | 2 hr |
Nearby
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.