Alert archive / Texas / Severe Thunderstorm Watches in 2017

Severe Thunderstorm Watch 202

May 9, 20175 counties in New Mexico; Beaver County, Oklahoma; 58 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at May 9, 2017, 9:59 PM MDT for 5 counties in New Mexico; Beaver County, Oklahoma; 58 counties in Texas. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: May 9, 2017, 9:59 PM MDT (03:59 UTC)
Expired: May 10, 2017, 6:00 AM MDT
In force: 8 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 64 counties

Chaves County, NM, Curry County, NM, Eddy County, NM, Lea County, NM, Roosevelt County, NM, Beaver County, OK, Andrews County, TX, Armstrong County, TX, Bailey County, TX, Borden County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Cochran County, TX, Collingsworth County, TX, Cottle County, TX, Crane County, TX, Crosby County, TX, Culberson County, TX, Dallam County, TX, Dawson County, TX, Deaf Smith County, TX, Dickens County, TX, Donley County, TX, Ector County, TX, Floyd County, TX, Gaines County, TX, Garza County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hansford County, TX, Hartley County, TX, Hemphill County, TX, Hockley County, TX, Howard County, TX, Hutchinson County, TX, Kent County, TX, King County, TX, Lamb County, TX, Lipscomb County, TX, Loving County, TX, Lubbock County, TX, Lynn County, TX, Martin County, TX, Midland County, TX, Moore County, TX, Motley County, TX, Ochiltree County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Reeves County, TX, Roberts County, TX, Scurry County, TX, Sherman County, TX, Swisher County, TX, Terry County, TX, Ward County, TX, Wheeler County, TX, Winkler County, TX, Yoakum County, TX

The radar

The Lubbock radar (KLBB), 98 km from the middle of the area, began a volume at 04:02 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: 10%
Ten or more severe wind reports: 50%
One or more gusts of 65 knots or more: 10%
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: 60%

Warnings issued inside it

32 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
May 9, 10:05 PM MDT	Severe Thunderstorm Warning	ABQ	Curry, Roosevelt	25 min
May 9, 10:07 PM MDT	Severe Thunderstorm Warning	LUB	Bailey, Parmer	28 min
May 9, 10:16 PM MDT	Severe Thunderstorm Warning	ABQ	Chaves, De Baca, Roosevelt	29 min
May 9, 10:24 PM MDT	Severe Thunderstorm Warning	LUB	Hale, Lamb	30 min
May 9, 10:25 PM MDT	Tornado Warning	ABQ	Roosevelt	12 min
May 9, 10:30 PM MDT	Severe Thunderstorm Warning	LUB	Bailey	45 min
May 9, 10:44 PM MDT	Severe Thunderstorm Warning	ABQ	Chaves, Roosevelt	46 min
May 9, 10:52 PM MDT	Severe Thunderstorm Warning	ABQ	Chaves	38 min
May 9, 10:57 PM MDT	Severe Thunderstorm Warning	MAF	Eddy	63 min
May 9, 11:11 PM MDT	Flash Flood Warning	LUB	Bailey	64 min
May 9, 11:14 PM MDT	Severe Thunderstorm Warning	LUB	Bailey, Castro, Lamb, Parmer	46 min
May 9, 11:17 PM MDT	Severe Thunderstorm Warning	ABQ	Chaves	48 min
May 9, 11:17 PM MDT	Severe Thunderstorm Warning	LUB	Swisher	28 min
May 9, 11:29 PM MDT	Severe Thunderstorm Warning	ABQ	Curry, Roosevelt	46 min
May 9, 11:33 PM MDT	Severe Thunderstorm Warning	ABQ	Chaves, De Baca	30 min
May 9, 11:34 PM MDT	Severe Thunderstorm Warning	MAF	Loving, Reeves, Ward, Winkler	26 min
May 9, 11:42 PM MDT	Severe Thunderstorm Warning	LUB	Briscoe, Swisher	26 min
May 9, 11:55 PM MDT	Severe Thunderstorm Warning	LUB	Castro, Lamb	50 min
May 10, 12:40 AM MDT	Severe Thunderstorm Warning	LUB	Briscoe, Castro, Swisher	50 min
May 10, 1:13 AM MDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	47 min
May 10, 1:13 AM MDT	Severe Thunderstorm Warning	LUB	Castro, Parmer	47 min
May 10, 1:16 AM MDT	Severe Thunderstorm Warning	ABQ	Curry, Roosevelt	44 min
May 10, 1:35 AM MDT	Severe Thunderstorm Warning	LUB	Bailey, Parmer	40 min
May 10, 1:42 AM MDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Randall	33 min
May 10, 1:49 AM MDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Donley, Gray	41 min
May 10, 2:08 AM MDT	Tornado Warning	AMA	Armstrong, Donley	22 min
May 10, 2:29 AM MDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Donley, Gray	61 min
May 10, 2:37 AM MDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	38 min
May 10, 3:04 AM MDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Potter, Randall	42 min
May 10, 3:06 AM MDT	Tornado Warning	AMA	Gray	24 min
May 10, 3:28 AM MDT	Severe Thunderstorm Warning	AMA	Gray, Hemphill, Roberts, Wheeler	62 min
May 10, 4:43 AM MDT	Severe Thunderstorm Warning	AMA	Hemphill	62 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, 4.0 hours before the alert went out and 183 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: 591 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 1404 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 9, 6:15 PM MDT	Mesoscale Discussion	SPC	Cloud, Jewell, Marshall, Mitchell, Osborne, Phillips and 4 more	2 hr
May 9, 8:32 PM MDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Finney, Gove, Graham, Grant and 16 more	58 min
May 10, 12:29 AM MDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Ellis, Gove, Graham, Jewell and 12 more	61 min
May 10, 5:04 AM MDT	Mesoscale Discussion	SPC	Barber, Comanche, Harper, Kingman	116 min
May 10, 11:39 AM MDT	Mesoscale Discussion	SPC	Bourbon, Franklin, Johnson, Leavenworth, Linn, Miami and 1 more	3 hr
May 10, 2:11 PM MDT	Mesoscale Discussion	SPC	Grant, Haskell, Morton, Seward, Stevens	94 min
May 10, 2:37 PM MDT	Mesoscale Discussion	SPC	Allen, Bourbon, Butler, Chautauqua, Cherokee, Cowley and 10 more	113 min
May 10, 5:30 PM MDT	Severe Thunderstorm Watch	SPC	Bourbon, Cherokee, Crawford	2 hr
May 9, 7:41 PM MDT	Mesoscale Discussion	SPC	Chaves, Curry, De Baca, Eddy, Harding, Lea and 2 more	2 hr
May 9, 9:17 PM MDT	Mesoscale Discussion	SPC	Curry, Lea, Roosevelt	28 min
May 10, 1:04 AM MDT	Mesoscale Discussion	SPC	Lea, Roosevelt	86 min
May 10, 1:04 PM MDT	Mesoscale Discussion	SPC	Colfax, Taos, Union	2 hr
May 10, 1:14 PM MDT	Mesoscale Discussion	SPC	Beckham, Caddo, Canadian, Comanche, Cotton, Custer and 8 more	61 min
May 10, 1:43 PM MDT	Tornado Watch	SPC	Caddo, Comanche, Cotton, Grady, Greer, Harmon and 5 more	7 hr
May 10, 4:27 PM MDT	Severe Thunderstorm Watch	SPC	Beaver, Texas	3 hr
May 10, 4:58 PM MDT	Mesoscale Discussion	SPC	Beckham, Caddo, Comanche, Cotton, Grady, Greer and 5 more	2 hr
May 10, 1:25 PM MDT	Mesoscale Discussion	SPC	Menard, Schleicher, Sutton, Val Verde	3 hr

Nearby

Severe Thunderstorm Watches in Texas, 2017 Severe Thunderstorm Watches in New Mexico, 2017 Severe Thunderstorm Watches in Oklahoma, 2017 Every severe thunderstorm watch in 2017

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.