Alert archive / Texas / Severe Thunderstorm Watches in 2006

Severe Thunderstorm Watch 321

May 9, 200614 counties in Oklahoma; 26 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at May 9, 2006, 6:01 PM CDT for 14 counties in Oklahoma; 26 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
May 9, 2006, 6:01 PM CDT (23:01 UTC)
Expired
May 10, 2006, 1:00 AM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
70 kt
All 40 counties

Beaver County, OK, Beckham County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kiowa County, OK, Roger Mills County, OK, Tillman County, OK, Washita County, OK, Woodward County, OK, Armstrong County, TX, Baylor County, TX, Briscoe County, TX, Carson 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, Gray County, TX, Hall County, TX, Hansford County, TX, Hardeman County, TX, Hemphill County, TX, Hutchinson County, TX, King County, TX, Knox County, TX, Lipscomb County, TX, Motley County, TX, Ochiltree County, TX, Roberts County, TX, Wheeler County, TX, Wilbarger County, TX

The radar

The Amarillo radar (KAMA), 120 km from the middle of the area, began a volume at 23:02 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
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
40%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 9, 7:01 PM CDTSevere Thunderstorm WarningAMAHutchinson74 min
May 9, 7:05 PM CDTSevere Thunderstorm WarningAMAArmstrong55 min
May 9, 7:09 PM CDTSevere Thunderstorm WarningLUBMotley66 min
May 9, 7:14 PM CDTSevere Thunderstorm WarningAMAGray76 min
May 9, 7:18 PM CDTSevere Thunderstorm WarningAMACarson72 min
May 9, 7:42 PM CDTSevere Thunderstorm WarningLUBDickens33 min
May 9, 7:47 PM CDTSevere Thunderstorm WarningAMARoberts73 min
May 9, 7:58 PM CDTSevere Thunderstorm WarningLUBHall62 min
May 9, 8:20 PM CDTSevere Thunderstorm WarningAMAWheeler85 min
May 9, 8:34 PM CDTSevere Thunderstorm WarningAMACollingsworth86 min
May 9, 8:48 PM CDTSevere Thunderstorm WarningAMADonley87 min
May 9, 8:58 PM CDTSevere Thunderstorm WarningLUBHall32 min
May 9, 9:00 PM CDTSevere Thunderstorm WarningLUBChildress60 min
May 9, 9:06 PM CDTSevere Thunderstorm WarningAMACarson69 min
May 9, 9:09 PM CDTSevere Thunderstorm WarningOUNHarmon51 min
May 9, 9:28 PM CDTSevere Thunderstorm WarningOUNHardeman62 min
May 9, 9:31 PM CDTSevere Thunderstorm WarningOUNGreer59 min
May 9, 9:31 PM CDTTornado WarningLUBChildress29 min
May 9, 9:43 PM CDTSevere Thunderstorm WarningAMAGray51 min
May 9, 9:53 PM CDTSevere Thunderstorm WarningOUNHarmon37 min
May 9, 9:57 PM CDTSevere Thunderstorm WarningAMACollingsworth63 min
May 9, 9:57 PM CDTSevere Thunderstorm WarningLUBChildress33 min
May 9, 10:07 PM CDTTornado WarningOUNGreer, Jackson38 min
May 9, 10:08 PM CDTTornado WarningOUNHardeman39 min
May 9, 10:16 PM CDTSevere Thunderstorm WarningAMACollingsworth, Donley89 min
May 9, 10:24 PM CDTSevere Thunderstorm WarningOUNHarmon36 min
May 9, 10:33 PM CDTTornado WarningOUNWilbarger42 min
May 9, 10:36 PM CDTSevere Thunderstorm WarningOUNJackson54 min
May 9, 10:51 PM CDTSevere Thunderstorm WarningOUNGreer, Harmon39 min
May 9, 11:05 PM CDTSevere Thunderstorm WarningOUNWashita40 min
May 9, 11:11 PM CDTSevere Thunderstorm WarningOUNWichita, Wilbarger49 min
May 9, 11:25 PM CDTSevere Thunderstorm WarningOUNGreer, Jackson41 min
May 9, 11:48 PM CDTSevere Thunderstorm WarningOUNKiowa42 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, 11.0 hours before the alert went out and 119 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-pSkew-T log-p diagram, Amarillo Airport, TX at 12:00Z on 2006-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 107 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Amarillo Airport, TX at 12:00Z on 2006-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
107 J/kg
Mixed-layer CIN
-342 J/kg
Mixed-layer LCL
729 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
137 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 9, 1:13 AM CDTMesoscale DiscussionSPCAlfalfa, Craig, Grant, Kay, Mayes, Noble and 6 more92 min
May 9, 4:24 AM CDTSevere Thunderstorm WatchSPCCraig, Delaware, Mayes, Nowata, Osage, Ottawa and 2 more4 hr
May 9, 3:45 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Cleveland, Coal and 24 more2 hr
May 9, 4:04 PM CDTTornado WatchSPCAtoka, Bryan, Choctaw, Coal, Haskell, Hughes and 12 more7 hr
May 9, 4:46 PM CDTMesoscale DiscussionSPCAdair, Cherokee, Craig, Delaware, Mayes, Nowata and 5 more89 min
May 9, 4:56 PM CDTMesoscale DiscussionSPCBeaver, Beckham, Custer, Dewey, Ellis, Harper and 5 more2 hr
May 9, 5:07 PM CDTTornado WatchSPCAdair, Cherokee, Creek, Delaware, Mayes, Muskogee and 5 more6 hr
May 9, 6:30 PM CDTMesoscale DiscussionSPCAdair, Atoka, Bryan, Cherokee, Choctaw, Coal and 17 more90 min
May 8, 7:42 PM CDTMesoscale DiscussionSPCNewton93 min
May 9, 4:08 PM CDTMesoscale DiscussionSPCBandera, Blanco, Burnet, Comal, Edwards, Gillespie and 11 more97 min
May 9, 6:30 PM CDTSevere Thunderstorm WatchSPCAtascosa, Bandera, Bell, Bexar, Blanco, Burnet and 27 more4 hr

Nearby

Severe Thunderstorm Watches in Texas, 2006Severe Thunderstorm Watches in Oklahoma, 2006Every severe thunderstorm watch in 2006

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.