Alert archive / Texas / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 662
The Storm Prediction Center issued this severe thunderstorm watch at Oct 13, 2012, 1:37 PM CDT for 25 counties in Texas. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Oct 13, 2012, 1:37 PM CDT (18:37 UTC)
- Expired
- Oct 13, 2012, 11:00 PM CDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 25 counties
Brown County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crockett County, TX, Edwards County, TX, Glasscock County, TX, Irion County, TX, Kimble County, TX, Kinney County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Mitchell County, TX, Pecos County, TX, Reagan County, TX, Runnels County, TX, San Saba County, TX, Schleicher County, TX, Scurry County, TX, Sterling County, TX, Sutton County, TX, Terrell County, TX, Tom Green County, TX, Val Verde County, TX
The radar
The San Angelo radar (KSJT), 84 km from the middle of the area, began a volume at 18:39 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
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 13, 4:44 PM CDT | Severe Thunderstorm Warning | SJT | Crockett, Irion, Schleicher | 46 min |
| Oct 13, 4:47 PM CDT | Severe Thunderstorm Warning | SJT | Irion, Tom Green | 43 min |
| Oct 13, 5:25 PM CDT | Severe Thunderstorm Warning | SJT | Irion, Sterling, Tom Green | 35 min |
| Oct 13, 5:33 PM CDT | Severe Thunderstorm Warning | SJT | Tom Green | 27 min |
| Oct 13, 5:36 PM CDT | Severe Thunderstorm Warning | SJT | Schleicher | 39 min |
| Oct 13, 5:56 PM CDT | Severe Thunderstorm Warning | SJT | Irion, Tom Green | 34 min |
| Oct 13, 6:17 PM CDT | Severe Thunderstorm Warning | SJT | Tom Green | 28 min |
| Oct 13, 6:45 PM CDT | Severe Thunderstorm Warning | SJT | Irion, Schleicher | 30 min |
| Oct 13, 7:08 PM CDT | Tornado Warning | SJT | Schleicher | 37 min |
| Oct 13, 7:15 PM CDT | Severe Thunderstorm Warning | SJT | Tom Green | 30 min |
| Oct 13, 7:30 PM CDT | Tornado Warning | SJT | Schleicher | 30 min |
| Oct 13, 7:55 PM CDT | Tornado Warning | SJT | Schleicher | 17 min |
| Oct 13, 8:12 PM CDT | Severe Thunderstorm Warning | SJT | Menard, Schleicher | 33 min |
| Oct 13, 8:22 PM CDT | Severe Thunderstorm Warning | SJT | Irion, Tom Green | 38 min |
| Oct 13, 8:50 PM CDT | Severe Thunderstorm Warning | SJT | Schleicher, Tom Green | 25 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, 6.6 hours before the alert went out and 145 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
- 2004 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 536 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 220 m²/s²
- 0-3 km storm-relative helicity
- 288 m²/s²
- Significant tornado parameter
- 1.7
- Supercell composite
- 9.8
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 12, 9:19 PM CDT | Mesoscale Discussion | SPC | Armstrong, Bailey, Briscoe, Carson, Castro, Cochran and 20 more | 56 min |
| Oct 12, 10:11 PM CDT | Mesoscale Discussion | SPC | Dallam, Hansford, Ochiltree, Sherman | 94 min |
| Oct 12, 11:34 PM CDT | Mesoscale Discussion | SPC | Andrews, Bailey, Cochran, Crosby, Dawson, Floyd and 9 more | 86 min |
| Oct 12, 11:52 PM CDT | Mesoscale Discussion | SPC | Dallam, Hansford, Hartley, Hutchinson, Lipscomb, Moore and 5 more | 83 min |
| Oct 13, 2:06 AM CDT | Mesoscale Discussion | SPC | Carson, Gray, Hansford, Hemphill, Hutchinson, Lipscomb and 7 more | 84 min |
| Oct 13, 12:23 PM CDT | Mesoscale Discussion | SPC | Baylor, Coke, Fisher, Foard, Hardeman, Haskell and 13 more | 3 hr |
| Oct 13, 1:00 PM CDT | Tornado Watch | SPC | Archer, Baylor, Callahan, Clay, Cooke, Eastland and 20 more | 8 hr |
| Oct 13, 1:10 PM CDT | Mesoscale Discussion | SPC | Coke, Concho, Crockett, Irion, Menard, Reagan and 7 more | 95 min |
| Oct 13, 2:55 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Cooke, Haskell, Jack and 8 more | 95 min |
| Oct 13, 3:42 PM CDT | Mesoscale Discussion | SPC | Coke, Crockett, Irion, Kinney, Maverick, Reagan and 6 more | 93 min |
| Oct 13, 6:30 PM CDT | Mesoscale Discussion | SPC | Angelina, Austin, Bastrop, Bexar, Brazos, Burleson and 27 more | 60 min |
| Oct 13, 6:59 PM CDT | Mesoscale Discussion | SPC | Archer, Callahan, Clay, Collin, Cooke, Dallas and 25 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Texas, 2012Every severe thunderstorm watch in 2012
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.