Alert archive / Texas / Mesoscale Discussions in 2009

Mesoscale Discussion 623

April 28, 20099 counties in New Mexico; 5 counties in Oklahoma; 54 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2009, 9:33 PM MDT for 9 counties in New Mexico; 5 counties in Oklahoma; 54 counties in Texas. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
Apr 28, 2009, 9:33 PM MDT (03:33 UTC)
Expired
Apr 28, 2009, 11:00 PM MDT
In force
87 min
Issued by
the Storm Prediction Center
All 68 counties

Chaves County, NM, Curry County, NM, De Baca County, NM, Eddy County, NM, Guadalupe County, NM, Harding County, NM, Lea County, NM, Quay County, NM, Roosevelt County, NM, Beckham County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Roger Mills County, OK, Andrews County, TX, Armstrong County, TX, Bailey County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Cochran County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dallam County, TX, Dawson County, TX, Deaf Smith County, TX, Dickens County, TX, Donley County, TX, Ector County, TX, Floyd County, TX, Foard County, TX, Gaines County, TX, Garza County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hansford County, TX, Hardeman County, TX, Hartley County, TX, Hemphill County, TX, Hockley County, TX, Hutchinson County, TX, Kent County, TX, King County, TX, Knox County, TX, Lamb County, TX, Lipscomb County, TX, Loving County, TX, Lubbock County, TX, Lynn County, TX, Moore County, TX, Motley County, TX, Ochiltree County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Stonewall 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), 43 km from the middle of the area, began a volume at 03:36 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.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 3.6 hours before the alert went out and 209 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, Midland Regional, TX at 00:00Z on 2009-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2059 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, Midland Regional, TX at 00:00Z on 2009-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 211 square meters per square second.19395878Sfc1 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
2059 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
495 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
211 m²/s²
0-3 km storm-relative helicity
273 m²/s²
Significant tornado parameter
2.8
Supercell composite
12.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 28, 6:46 PM MDTMesoscale DiscussionSPCChaves, Curry, De Baca, Eddy, Lea, Quay and 1 more119 min
Apr 28, 9:57 PM MDTSevere Thunderstorm WatchSPCChaves, Eddy, Lea, Roosevelt5 hr
Apr 28, 8:25 PM MDTSevere Thunderstorm WatchSPCComanche, Cotton, Greer, Harmon, Jackson, Kiowa and 1 more6 hr
Apr 29, 12:37 AM MDTMesoscale DiscussionSPCHarper, Woods83 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, 1:59 PM MDTMesoscale DiscussionSPCBeaver, Texas91 min
Apr 29, 2:04 PM MDTMesoscale DiscussionSPCMcCurtain56 min
Apr 29, 2:47 PM MDTTornado WatchSPCBeaver, Cimarron, Texas7 hr
Apr 29, 4:17 PM MDTMesoscale DiscussionSPCBeaver, Cimarron, Texas88 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 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

Mesoscale Discussions in Texas, 2009Mesoscale Discussions in New Mexico, 2009Mesoscale Discussions in Oklahoma, 2009Every mesoscale discussion 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.