Alert archive / Texas / Severe Thunderstorm Watches in 2015
Severe Thunderstorm Watch 56
The Storm Prediction Center issued this severe thunderstorm watch at Apr 12, 2015, 5:17 PM CDT for 19 counties in Kansas; 20 counties in Oklahoma; 22 counties in Texas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 12, 2015, 5:17 PM CDT (22:17 UTC)
- Expired
- Apr 13, 2015, 12:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 61 counties
Barber County, KS, Barton County, KS, Butler County, KS, Clark County, KS, Comanche County, KS, Cowley County, KS, Edwards County, KS, Harper County, KS, Harvey County, KS, Kingman County, KS, Kiowa County, KS, Marion County, KS, McPherson County, KS, Pratt County, KS, Reno County, KS, Rice County, KS, Sedgwick County, KS, Stafford County, KS, Sumner County, KS, Alfalfa County, OK, Beaver County, OK, Beckham County, OK, Blaine County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kingfisher County, OK, Kiowa County, OK, Major County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Briscoe County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, Kent County, TX, King County, TX, Lipscomb County, TX, Motley County, TX, Ochiltree County, TX, Roberts County, TX, Stonewall County, TX, Wheeler County, TX
The radar
The Altus AFB radar (KFDR), 130 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
- 20%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 70%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 80%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
31 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 12, 5:31 PM CDT | Severe Thunderstorm Warning | AMA | Hemphill, Wheeler | 59 min |
| Apr 12, 5:43 PM CDT | Severe Thunderstorm Warning | LUB | Hall | 32 min |
| Apr 12, 5:54 PM CDT | Severe Thunderstorm Warning | AMA | Collingsworth, Donley | 66 min |
| Apr 12, 6:28 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Roger Mills | 47 min |
| Apr 12, 6:58 PM CDT | Severe Thunderstorm Warning | AMA | Collingsworth, Donley | 62 min |
| Apr 12, 7:01 PM CDT | Severe Thunderstorm Warning | DDC | Edwards, Ford, Kiowa | 44 min |
| Apr 12, 7:02 PM CDT | Severe Thunderstorm Warning | DDC | Barber, Pratt | 58 min |
| Apr 12, 7:13 PM CDT | Severe Thunderstorm Warning | OUN | Roger Mills | 47 min |
| Apr 12, 7:20 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Harper, Woods, Woodward | 40 min |
| Apr 12, 7:38 PM CDT | Severe Thunderstorm Warning | ICT | Rice | 52 min |
| Apr 12, 7:53 PM CDT | Severe Thunderstorm Warning | AMA | Collingsworth | 67 min |
| Apr 12, 7:57 PM CDT | Severe Thunderstorm Warning | DDC | Barber | 42 min |
| Apr 12, 7:57 PM CDT | Severe Thunderstorm Warning | OUN | Roger Mills | 48 min |
| Apr 12, 7:59 PM CDT | Severe Thunderstorm Warning | ICT | Rice | 31 min |
| Apr 12, 7:59 PM CDT | Severe Thunderstorm Warning | OUN | Woods, Woodward | 46 min |
| Apr 12, 8:02 PM CDT | Severe Thunderstorm Warning | DDC | Pratt, Stafford | 32 min |
| Apr 12, 8:09 PM CDT | Severe Thunderstorm Warning | OUN | Beckham, Greer, Harmon | 51 min |
| Apr 12, 8:14 PM CDT | Severe Thunderstorm Warning | ICT | McPherson | 34 min |
| Apr 12, 8:19 PM CDT | Severe Thunderstorm Warning | ICT | Reno | 41 min |
| Apr 12, 8:19 PM CDT | Severe Thunderstorm Warning | ICT | Kingman | 41 min |
| Apr 12, 8:20 PM CDT | Tornado Warning | DDC | Barber | 10 min |
| Apr 12, 8:42 PM CDT | Severe Thunderstorm Warning | OUN | Woods | 48 min |
| Apr 12, 8:45 PM CDT | Severe Thunderstorm Warning | OUN | Roger Mills | 45 min |
| Apr 12, 8:46 PM CDT | Severe Thunderstorm Warning | OUN | Major, Woodward | 44 min |
| Apr 12, 8:53 PM CDT | Severe Thunderstorm Warning | ICT | Reno | 28 min |
| Apr 12, 8:57 PM CDT | Severe Thunderstorm Warning | ICT | Harper, Kingman | 39 min |
| Apr 12, 9:27 PM CDT | Severe Thunderstorm Warning | OUN | Major, Woodward | 26 min |
| Apr 12, 9:46 PM CDT | Severe Thunderstorm Warning | LUB | Childress, Cottle, Hall | 29 min |
| Apr 12, 10:27 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Grant, Woods | 48 min |
| Apr 12, 10:29 PM CDT | Severe Thunderstorm Warning | DDC | Barber | 16 min |
| Apr 12, 10:40 PM CDT | Severe Thunderstorm Warning | ICT | Harper | 20 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
Dodge City, (KDDC), launched 12:00Z, 10.3 hours before the alert went out and 288 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
- 905 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 488 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 365 m²/s²
- 0-3 km storm-relative helicity
- 363 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 8.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 11, 8:19 PM CDT | Mesoscale Discussion | SPC | Barber, Clark, Comanche, Edwards, Ford, Grant and 7 more | 56 min |
| Apr 12, 5:03 PM CDT | Mesoscale Discussion | SPC | Barber, Comanche, Harper, Kingman, Kiowa, Pratt and 2 more | 57 min |
| Apr 12, 5:42 PM CDT | Mesoscale Discussion | SPC | Clay, Cloud, Ellis, Ellsworth, Jewell, Lincoln and 11 more | 63 min |
| Apr 12, 5:05 PM CDT | Mesoscale Discussion | SPC | Andrews, Borden, Crane, Crockett, Dawson, Ector and 15 more | 115 min |
| Apr 12, 5:39 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bee, Bexar, Brooks, Dimmit and 20 more | 2 hr |
| Apr 12, 5:59 PM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Bandera, Brooks, Cameron, Crockett, Dimmit and 28 more | 7 hr |
Nearby
Severe Thunderstorm Watches in Texas, 2015Severe Thunderstorm Watches in Oklahoma, 2015Severe Thunderstorm Watches in Kansas, 2015Every severe thunderstorm watch in 2015
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.