Alert archive / Texas / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 399
The Storm Prediction Center issued this severe thunderstorm watch at Jun 15, 2012, 8:39 PM CDT for 20 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 15, 2012, 8:39 PM CDT (01:39 UTC)
- Expired
- Jun 16, 2012, 2:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 70 kt
Counties Briscoe County, TX, Castro County, TX, Childress County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Floyd County, TX, Garza County, TX, Hale County, TX, Hall County, TX, Hockley County, TX, Kent County, TX, King County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Motley County, TX, Stonewall County, TX, Swisher County, TX, Terry County, TX
The radar
The Lubbock radar (KLBB), 65 km from the middle of the area, began a volume at 01:40 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
- 70%
- One or more gusts of 65 knots or more
- 60%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 50%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 15, 8:54 PM CDT | Severe Thunderstorm Warning | LUB | Hockley, Lubbock, Lynn, Terry, Yoakum | 51 min |
| Jun 15, 8:59 PM CDT | Severe Thunderstorm Warning | LUB | Castro, Hale, Lamb, Swisher | 61 min |
| Jun 15, 9:44 PM CDT | Severe Thunderstorm Warning | LUB | Crosby, Hockley, Lubbock, Lynn, Terry | 44 min |
| Jun 15, 11:12 PM CDT | Severe Thunderstorm Warning | LUB | Briscoe, Childress, Cottle, Crosby, Dickens, Floyd and 3 more | 64 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
Amarillo Airport, TX (KAMA), launched 00:00Z, 1.7 hours before the alert went out and 139 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
- 1006 J/kg
- Mixed-layer CIN
- -184 J/kg
- Mixed-layer LCL
- 2140 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 15, 8:37 PM CDT | Mesoscale Discussion | SPC | Briscoe, Castro, Crosby, Dickens, Floyd, Garza and 10 more | 23 min |
| Jun 15, 11:44 PM CDT | Mesoscale Discussion | SPC | Armstrong, Briscoe, Childress, Collingsworth, Cottle, Crosby and 13 more | 91 min |
| Jun 16, 1:45 AM CDT | Mesoscale Discussion | SPC | Bailey, Briscoe, Castro, Childress, Cochran, Cottle and 20 more | 60 min |
| Jun 16, 3:02 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Dickens, Foard, Haskell and 10 more | 88 min |
| Jun 16, 6:24 PM CDT | Mesoscale Discussion | SPC | Dallam, Hansford, Hartley, Hemphill, Hutchinson, Lipscomb and 4 more | 96 min |
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.