Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 561

May 9, 20154 states

The Storm Prediction Center issued this mesoscale discussion at May 9, 2015, 4:51 AM MDT for 4 states. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
May 9, 2015, 4:51 AM MDT (10:51 UTC)
Expired
May 9, 2015, 6:15 AM MDT
In force
84 min
Issued by
the Storm Prediction Center
All 81 counties

Baca County, CO, Prowers County, CO, Barber County, KS, Clark County, KS, Comanche County, KS, Edwards County, KS, Finney County, KS, Ford County, KS, Grant County, KS, Gray County, KS, Greeley County, KS, Hamilton County, KS, Haskell County, KS, Hodgeman County, KS, Kearny County, KS, Kiowa County, KS, Lane County, KS, Meade County, KS, Morton County, KS, Ness County, KS, Pawnee County, KS, Pratt County, KS, Scott County, KS, Seward County, KS, Stanton County, KS, Stevens County, KS, Wichita County, KS, Beaver County, OK, Beckham County, OK, Blaine County, OK, Cimarron County, OK, Comanche 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, Major County, OK, Roger Mills County, OK, Texas County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dallam County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Foard County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hansford County, TX, Hardeman County, TX, Hartley County, TX, Hemphill County, TX, Hutchinson County, TX, King County, TX, Lipscomb County, TX, Moore County, TX, Motley County, TX, Ochiltree County, TX, Oldham County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Swisher County, TX, Wheeler County, TX, Wilbarger County, TX

The radar

The Amarillo radar (KAMA), 106 km from the middle of the area, began a volume at 10:55 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 10.9 hours before the alert went out and 106 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 00:00Z on 2015-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 20 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 00:00Z on 2015-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
20 J/kg
Mixed-layer CIN
-217 J/kg
Mixed-layer LCL
978 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
8 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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
May 8, 6:55 PM MDTMesoscale DiscussionSPCBent, Crowley, Custer, El Paso, Huerfano, Las Animas and 3 more2 hr
May 9, 11:40 AM MDTMesoscale DiscussionSPCBaca, Bent, Cheyenne, Kiowa, Kit Carson, Prowers65 min
May 9, 11:55 AM MDTTornado WatchSPCBaca, Bent, Cheyenne, Crowley, Elbert, El Paso and 12 more11 hr
May 9, 2:34 PM MDTMesoscale DiscussionSPCBaca, Bent, Cheyenne, Kiowa, Kit Carson, Lincoln and 7 more56 min
May 9, 5:16 PM MDTMesoscale DiscussionSPCAdams, Baca, Bent, Cheyenne, Crowley, Elbert and 11 more119 min
May 9, 6:36 AM MDTSevere Thunderstorm WatchSPCBarber, Clark, Comanche, Edwards, Finney, Ford and 12 more6 hr
May 9, 10:36 AM MDTMesoscale DiscussionSPCBarber, Edwards, Harper, Kingman, Kiowa, Pawnee and 3 more84 min
May 8, 6:27 PM MDTTornado WatchSPCAtoka, Bryan, Carter, Choctaw, Coal, Creek and 18 more6 hr
May 8, 9:43 PM MDTMesoscale DiscussionSPCAtoka, Bryan, Choctaw, Coal, Haskell, Latimer and 4 more92 min
May 9, 2:11 AM MDTSevere Thunderstorm WatchSPCBeaver, Cimarron, Texas8 hr
May 9, 3:03 AM MDTMesoscale DiscussionSPCComanche, Cotton, Greer, Harmon, Jackson, Kiowa and 1 more57 min
May 9, 8:41 AM MDTMesoscale DiscussionSPCAtoka, Bryan, Choctaw, Coal, Johnston, LeFlore and 5 more2 hr
May 9, 12:21 PM MDTTornado WatchSPCAtoka, Bryan, Caddo, Canadian, Carter, Cleveland and 23 more10 hr
May 9, 12:58 PM MDTMesoscale DiscussionSPCLeFlore, McCurtain92 min
May 9, 1:40 PM MDTTornado WatchSPCMcCurtain7 hr
May 9, 2:32 PM MDTMesoscale DiscussionSPCBryan, Carter, Coal, Cotton, Garvin, Hughes and 10 more118 min
May 9, 3:52 PM MDTMesoscale DiscussionSPCBeckham, Greer, Harmon, Roger Mills83 min
May 9, 4:52 PM MDTMesoscale DiscussionSPCBryan, Carter, Cotton, Jefferson, Johnston, Love and 1 more83 min
May 8, 7:42 PM MDTMesoscale DiscussionSPCAndrews, Borden, Callahan, Coke, Coleman, Concho and 28 more2 hr
May 8, 9:48 PM MDTMesoscale DiscussionSPCAndrews, Borden, Callahan, Coke, Crane, Crockett and 26 more87 min
May 9, 1:34 AM MDTMesoscale DiscussionSPCAndrews, Bailey, Castro, Cochran, Dallam, Dawson and 14 more116 min
May 9, 4:06 PM MDTMesoscale DiscussionSPCCass54 min
May 9, 5:21 PM MDTMesoscale DiscussionSPCBrown, Coleman, Comanche, Eastland, Erath, Hood and 6 more84 min

Nearby

Mesoscale Discussions in Texas, 2015Mesoscale Discussions in Kansas, 2015Mesoscale Discussions in Oklahoma, 2015Every mesoscale discussion in 2015

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.