Alert archive / Texas / Severe Thunderstorm Watches in 2012

Severe Thunderstorm Watch 335

June 1, 20124 states

The Storm Prediction Center issued this severe thunderstorm watch at Jun 1, 2012, 2:22 PM CDT for 4 states. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Jun 1, 2012, 2:22 PM CDT (19:22 UTC)
Expired: Jun 1, 2012, 10:00 PM CDT
In force: 8 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2.5 in
Strongest gust expected: 65 kt

All 43 counties

Grant County, KS, Gray County, KS, Haskell County, KS, Meade County, KS, Morton County, KS, Seward County, KS, Stanton County, KS, Stevens County, KS, Colfax County, NM, Curry County, NM, Harding County, NM, Mora County, NM, Quay County, NM, San Miguel County, NM, Union County, NM, Beaver County, OK, Beckham County, OK, Cimarron County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Roger Mills County, OK, Texas County, OK, Armstrong County, TX, Carson County, TX, Collingsworth County, TX, Dallam County, TX, Deaf Smith County, TX, Donley County, TX, Gray County, TX, Hansford County, TX, Hartley County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Oldham County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 148 km from the middle of the area, began a volume at 19:23 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: 40%
Ten or more severe hail reports: 70%
One or more hailstones of 2 inches or more: 60%
Six or more combined severe hail and wind reports: 90%

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
Jun 1, 3:19 PM CDT	Severe Thunderstorm Warning	AMA	Cimarron, Texas	30 min
Jun 1, 4:19 PM CDT	Severe Thunderstorm Warning	AMA	Texas	18 min
Jun 1, 4:45 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hartley	45 min
Jun 1, 4:49 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Potter, Randall	41 min
Jun 1, 5:21 PM CDT	Severe Thunderstorm Warning	DDC	Clark, Meade	39 min
Jun 1, 5:23 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hartley	52 min
Jun 1, 5:25 PM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Wheeler	50 min
Jun 1, 5:27 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Donley, Gray	48 min
Jun 1, 5:38 PM CDT	Severe Thunderstorm Warning	AMA	Beaver	37 min
Jun 1, 5:46 PM CDT	Severe Thunderstorm Warning	AMA	Lipscomb	44 min
Jun 1, 5:50 PM CDT	Severe Thunderstorm Warning	AMA	Wheeler	40 min
Jun 1, 5:55 PM CDT	Severe Thunderstorm Warning	AMA	Hartley	50 min
Jun 1, 6:07 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Randall	38 min
Jun 1, 6:16 PM CDT	Severe Thunderstorm Warning	AMA	Wheeler	29 min
Jun 1, 6:32 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley, Gray, Wheeler	43 min
Jun 1, 6:36 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Oldham	39 min
Jun 1, 6:41 PM CDT	Severe Thunderstorm Warning	AMA	Beaver, Texas	36 min
Jun 1, 6:44 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	46 min
Jun 1, 7:10 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Wheeler	65 min
Jun 1, 7:11 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	33 min
Jun 1, 7:18 PM CDT	Severe Thunderstorm Warning	ABQ	Quay	27 min
Jun 1, 7:41 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon	49 min
Jun 1, 8:20 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	40 min
Jun 1, 8:21 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	39 min
Jun 1, 8:58 PM CDT	Severe Thunderstorm Warning	OUN	Harmon, Jackson	28 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, 7.4 hours before the alert went out and 149 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1343 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 301 m²/s²
0-3 km storm-relative helicity: 446 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 1, 1:53 PM CDT	Mesoscale Discussion	SPC	Grant, Haskell, Morton, Seward, Stanton, Stevens	97 min
Jun 1, 3:52 PM CDT	Mesoscale Discussion	SPC	Grant, Gray, Haskell, Meade, Morton, Seward and 1 more	53 min
Jun 1, 6:03 PM CDT	Mesoscale Discussion	SPC	Beckham, Custer, Dewey, Ellis, Greer, Harmon and 7 more	117 min
Jun 1, 6:22 PM CDT	Severe Thunderstorm Watch	SPC	Jackson	6 hr

Nearby

Severe Thunderstorm Watches in Texas, 2012 Severe Thunderstorm Watches in Kansas, 2012 Severe Thunderstorm Watches in Oklahoma, 2012 Every 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.