Alert archive / Texas / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 681
The Storm Prediction Center issued this severe thunderstorm watch at Dec 14, 2012, 2:28 PM CST for 6 counties in Oklahoma; 46 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 14, 2012, 2:28 PM CST (20:28 UTC)
- Expired
- Dec 14, 2012, 7:20 PM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 60 kt
All 52 counties
Beckham County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Roger Mills County, OK, Armstrong County, TX, Bailey County, TX, Baylor County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Cochran County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Deaf Smith County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hansford County, TX, Hardeman County, TX, Hemphill County, TX, Hockley County, TX, Hutchinson County, TX, Kent County, TX, King County, TX, Knox County, TX, Lamb County, TX, Lipscomb County, TX, Lubbock County, TX, Lynn County, TX, Moore County, TX, Motley County, TX, Ochiltree County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Stonewall County, TX, Swisher County, TX, Terry County, TX, Wheeler County, TX, Wilbarger County, TX, Yoakum County, TX
The radar
The Amarillo radar (KAMA), 49 km from the middle of the area, began a volume at 20:29 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
- 60%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
16 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 14, 2:58 PM CST | Severe Thunderstorm Warning | LUB | Bailey, Castro, Lamb, Parmer | 32 min |
| Dec 14, 3:05 PM CST | Severe Thunderstorm Warning | AMA | Deaf Smith, Oldham | 55 min |
| Dec 14, 3:25 PM CST | Severe Thunderstorm Warning | AMA | Moore, Potter, Randall | 95 min |
| Dec 14, 3:25 PM CST | Severe Thunderstorm Warning | LUB | Castro, Floyd, Hale, Hockley, Lamb, Lubbock and 1 more | 35 min |
| Dec 14, 4:02 PM CST | Severe Thunderstorm Warning | LUB | Briscoe, Crosby, Floyd, Hale, Hockley, Lubbock and 1 more | 28 min |
| Dec 14, 4:03 PM CST | Severe Thunderstorm Warning | AMA | Armstrong, Carson, Hutchinson | 73 min |
| Dec 14, 4:19 PM CST | Tornado Warning | AMA | Armstrong, Carson | 26 min |
| Dec 14, 4:28 PM CST | Severe Thunderstorm Warning | LUB | Briscoe, Crosby, Floyd, Hall, Lubbock, Motley | 32 min |
| Dec 14, 4:48 PM CST | Severe Thunderstorm Warning | AMA | Donley, Gray | 52 min |
| Dec 14, 4:51 PM CST | Severe Thunderstorm Warning | LUB | Briscoe, Crosby, Dickens, Floyd, Hall, Motley | 24 min |
| Dec 14, 4:53 PM CST | Tornado Warning | AMA | Donley | 27 min |
| Dec 14, 4:54 PM CST | Tornado Warning | AMA | Gray | 26 min |
| Dec 14, 5:13 PM CST | Severe Thunderstorm Warning | AMA | Collingsworth, Wheeler | 68 min |
| Dec 14, 5:16 PM CST | Severe Thunderstorm Warning | LUB | Childress, Cottle, Dickens, Hall, King, Motley | 29 min |
| Dec 14, 5:48 PM CST | Severe Thunderstorm Warning | OUN | Beckham, Custer, Dewey, Greer, Harmon, Jackson and 3 more | 57 min |
| Dec 14, 5:57 PM CST | Severe Thunderstorm Warning | OUN | Foard, Hardeman, Knox | 48 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 12:00Z, 8.5 hours before the alert went out and 49 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1556 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 14, 2:12 PM CST | Mesoscale Discussion | SPC | Beaver, Beckham, Ellis, Roger Mills, Texas | 93 min |
| Dec 14, 3:38 PM CST | Mesoscale Discussion | SPC | Beckham, Ellis, Greer, Harmon, Roger Mills | 97 min |
| Dec 14, 5:21 PM CST | Mesoscale Discussion | SPC | Beckham, Caddo, Comanche, Cotton, Custer, Dewey and 7 more | 84 min |
Nearby
Severe Thunderstorm Watches in Texas, 2012Severe Thunderstorm Watches in Oklahoma, 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.