Alert archive / Texas / Tornado Watches in 2009

Tornado Watch 213

April 29, 20094 states

The Storm Prediction Center issued this tornado watch at Apr 29, 2009, 2:47 PM MDT for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Apr 29, 2009, 2:47 PM MDT (20:47 UTC)
Expired
Apr 29, 2009, 10:00 PM MDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
3 in
Strongest gust expected
60 kt
All 45 counties

Baca County, CO, Kiowa County, CO, Prowers County, CO, Finney County, KS, Grant County, KS, Gray County, KS, Greeley County, KS, Hamilton County, KS, Haskell County, KS, Kearny County, KS, Lane County, KS, Meade County, KS, Morton County, KS, Scott County, KS, Seward County, KS, Stanton County, KS, Stevens County, KS, Wichita County, KS, Beaver County, OK, Cimarron County, OK, Texas County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Donley County, TX, Floyd County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hansford County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Motley County, TX, Ochiltree County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Swisher County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 169 km from the middle of the area, began a volume at 20:46 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
50%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
30%
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
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 29, 2:57 PM MDTSevere Thunderstorm WarningLUBChildress, Cottle, Hall, Motley63 min
Apr 29, 3:03 PM MDTTornado WarningLUBHall27 min
Apr 29, 3:20 PM MDTSevere Thunderstorm WarningAMAHansford, Hutchinson, Ochiltree, Roberts55 min
Apr 29, 3:25 PM MDTTornado WarningLUBHall50 min
Apr 29, 3:29 PM MDTSevere Thunderstorm WarningDDCHamilton, Kearny46 min
Apr 29, 3:42 PM MDTSevere Thunderstorm WarningLUBBriscoe, Floyd, Hall, Motley63 min
Apr 29, 3:45 PM MDTSevere Thunderstorm WarningLUBCastro, Hale, Swisher60 min
Apr 29, 3:47 PM MDTSevere Thunderstorm WarningGLDGreeley, Wallace, Wichita43 min
Apr 29, 3:48 PM MDTSevere Thunderstorm WarningAMAHutchinson, Moore, Potter42 min
Apr 29, 3:54 PM MDTSevere Thunderstorm WarningLUBChildress, Cottle33 min
Apr 29, 4:11 PM MDTTornado WarningLUBChildress, Hall34 min
Apr 29, 4:28 PM MDTSevere Thunderstorm WarningGLDWichita46 min
Apr 29, 4:34 PM MDTSevere Thunderstorm WarningLUBBriscoe, Hall26 min
Apr 29, 4:39 PM MDTSevere Thunderstorm WarningLUBBriscoe, Floyd, Hale66 min
Apr 29, 4:43 PM MDTSevere Thunderstorm WarningAMACarson, Hutchinson, Moore, Potter62 min
Apr 29, 4:45 PM MDTSevere Thunderstorm WarningLUBBriscoe, Floyd, Hall, Motley60 min
Apr 29, 4:49 PM MDTSevere Thunderstorm WarningAMACollingsworth, Donley44 min
Apr 29, 4:49 PM MDTTornado WarningLUBBriscoe, Floyd26 min
Apr 29, 4:58 PM MDTSevere Thunderstorm WarningDDCFinney, Kearny62 min
Apr 29, 5:14 PM MDTTornado WarningLUBFloyd, Motley31 min
Apr 29, 5:24 PM MDTTornado WarningAMACarson36 min
Apr 29, 5:26 PM MDTSevere Thunderstorm WarningAMAArmstrong, Randall46 min
Apr 29, 5:27 PM MDTSevere Thunderstorm WarningDDCFinney, Scott48 min
Apr 29, 5:28 PM MDTTornado WarningLUBCottle, Motley47 min
Apr 29, 5:32 PM MDTSevere Thunderstorm WarningAMACollingsworth, Donley, Gray, Wheeler43 min
Apr 29, 5:46 PM MDTTornado WarningLUBFloyd, Motley59 min
Apr 29, 5:55 PM MDTTornado WarningDDCFinney35 min
Apr 29, 5:56 PM MDTSevere Thunderstorm WarningLUBCottle, Dickens, King, Motley34 min
Apr 29, 6:00 PM MDTSevere Thunderstorm WarningDDCFinney, Scott31 min
Apr 29, 6:01 PM MDTSevere Thunderstorm WarningAMAArmstrong, Carson, Donley, Gray, Hutchinson, Potter and 1 more44 min
Apr 29, 6:08 PM MDTTornado WarningDDCFinney22 min
Apr 29, 6:12 PM MDTTornado WarningLUBCottle, Motley48 min
Apr 29, 6:13 PM MDTSevere Thunderstorm WarningDDCLane, Ness, Trego26 min
Apr 29, 6:27 PM MDTTornado WarningDDCFinney, Haskell33 min
Apr 29, 6:31 PM MDTSevere Thunderstorm WarningLUBCottle, King59 min
Apr 29, 6:37 PM MDTTornado WarningLUBCottle38 min
Apr 29, 6:43 PM MDTSevere Thunderstorm WarningLUBMotley62 min
Apr 29, 6:47 PM MDTSevere Thunderstorm WarningAMAArmstrong, Carson, Donley, Gray, Hutchinson, Potter43 min
Apr 29, 6:57 PM MDTTornado WarningDDCFinney, Haskell48 min
Apr 29, 7:24 PM MDTSevere Thunderstorm WarningDDCHaskell51 min
Apr 29, 7:27 PM MDTSevere Thunderstorm WarningLUBCottle, King63 min
Apr 29, 7:30 PM MDTSevere Thunderstorm WarningAMAArmstrong, Carson, Donley, Gray45 min
Apr 29, 7:44 PM MDTTornado WarningDDCHaskell31 min
Apr 29, 7:47 PM MDTSevere Thunderstorm WarningDDCFinney, Haskell43 min
Apr 29, 8:14 PM MDTSevere Thunderstorm WarningAMACollingsworth, Donley, Gray, Wheeler46 min
Apr 29, 8:17 PM MDTSevere Thunderstorm WarningDDCFinney, Grant, Haskell, Kearny, Seward43 min
Apr 29, 9:01 PM MDTSevere Thunderstorm WarningDDCGrant, Haskell, Kearny, Seward, Stevens74 min
Apr 29, 9:20 PM MDTSevere Thunderstorm WarningAMACollingsworth26 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, 8.8 hours before the alert went out and 170 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 2009-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 526 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 2009-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 88 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
526 J/kg
Mixed-layer CIN
-77 J/kg
Mixed-layer LCL
1132 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
150 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.

IssuedProductOfficeCountiesLasted
Apr 29, 1:59 PM MDTMesoscale DiscussionSPCProwers91 min
Apr 29, 4:17 PM MDTMesoscale DiscussionSPCBaca, Kiowa, Prowers88 min
Apr 29, 12:37 AM MDTMesoscale DiscussionSPCBarber, Barton, Cloud, Comanche, Edwards, Ellis and 18 more83 min
Apr 28, 8:25 PM MDTSevere Thunderstorm WatchSPCComanche, Cotton, Greer, Harmon, Jackson, Kiowa and 1 more6 hr
Apr 28, 9:33 PM MDTMesoscale DiscussionSPCBeckham, Greer, Harmon, Jackson, Roger Mills87 min
Apr 29, 1:46 AM MDTMesoscale DiscussionSPCBeckham, Comanche, Greer, Harmon, Jackson, Kiowa and 3 more89 min
Apr 29, 2:49 AM MDTSevere Thunderstorm WatchSPCBeckham, Blaine, Caddo, Canadian, Carter, Cleveland and 19 more7 hr
Apr 29, 5:09 AM MDTMesoscale DiscussionSPCBeckham, Caddo, Canadian, Carter, Cleveland, Comanche and 14 more96 min
Apr 29, 8:16 AM MDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Garvin and 9 more89 min
Apr 29, 8:36 AM MDTSevere Thunderstorm WatchSPCAtoka, Bryan, Choctaw, Coal, Haskell, Hughes and 9 more6 hr
Apr 29, 11:58 AM MDTMesoscale DiscussionSPCAtoka, Bryan, Choctaw, Latimer, LeFlore, McCurtain and 1 more2 hr
Apr 29, 2:04 PM MDTMesoscale DiscussionSPCMcCurtain56 min
Apr 29, 5:21 PM MDTMesoscale DiscussionSPCJefferson54 min
Apr 28, 6:23 PM MDTMesoscale DiscussionSPCAndrews, Armstrong, Bailey, Borden, Briscoe, Callahan and 61 more3 hr
Apr 28, 6:46 PM MDTMesoscale DiscussionSPCLoving, Pecos, Reeves, Ward, Winkler119 min
Apr 28, 9:57 PM MDTSevere Thunderstorm WatchSPCAndrews, Dawson, Ector, Gaines, Loving, Martin and 2 more5 hr
Apr 29, 11:07 AM MDTMesoscale DiscussionSPCBorden, Bosque, Callahan, Coke, Coleman, Comanche and 33 more113 min
Apr 29, 11:36 AM MDTTornado WatchSPCArcher, Baylor, Borden, Callahan, Clay, Crosby and 32 more9 hr
Apr 29, 1:03 PM MDTMesoscale DiscussionSPCCoke, Crockett, Glasscock, Irion, Midland, Reagan and 3 more57 min
Apr 29, 1:33 PM MDTTornado WatchSPCCoke, Concho, Crockett, Edwards, Glasscock, Irion and 14 more9 hr
Apr 29, 2:27 PM MDTSevere Thunderstorm WatchSPCBowie, Camp, Cass, Collin, Cooke, Dallas and 24 more6 hr
Apr 29, 2:34 PM MDTMesoscale DiscussionSPCArcher, Baylor, Borden, Callahan, Clay, Crosby and 31 more56 min
Apr 29, 4:19 PM MDTMesoscale DiscussionSPCBowie, Camp, Cass, Collin, Cooke, Delta and 21 more116 min
Apr 29, 4:53 PM MDTMesoscale DiscussionSPCBowie, Camp, Cass, Collin, Cooke, Dallas and 20 more67 min

Nearby

Tornado Watches in Texas, 2009Tornado Watches in Kansas, 2009Tornado Watches in Colorado, 2009Every tornado watch in 2009

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.