Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 653

May 15, 201510 counties in Kansas; 6 counties in Oklahoma; 37 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 15, 2015, 8:05 PM CDT for 10 counties in Kansas; 6 counties in Oklahoma; 37 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 15, 2015, 8:05 PM CDT (01:05 UTC)
Expired
May 15, 2015, 10:30 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 53 counties

Clark County, KS, Ford County, KS, Grant County, KS, Gray County, KS, Haskell County, KS, Meade County, KS, Morton County, KS, Seward County, KS, Stanton County, KS, Stevens County, KS, Beaver County, OK, Cimarron County, OK, Ellis County, OK, Harper County, OK, Roger Mills County, OK, Texas County, OK, 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, Deaf Smith County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hansford County, TX, Hartley County, TX, Hemphill County, TX, Hockley County, TX, Hutchinson County, TX, Lamb County, TX, Lipscomb County, TX, Lubbock 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, Swisher County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 38 km from the middle of the area, began a volume at 01:07 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, 1.1 hours before the alert went out and 38 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 2015-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 414 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 2015-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 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
414 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
1962 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
128 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.0

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 16, 12:43 AM CDTMesoscale DiscussionSPCBarton, Clark, Edwards, Ellis, Ford, Graham and 15 more92 min
May 16, 10:55 AM CDTMesoscale DiscussionSPCButler, Chautauqua, Cowley, Elk, Greenwood, Sumner95 min
May 16, 12:01 PM CDTMesoscale DiscussionSPCFinney, Grant, Hamilton, Haskell, Kearny, Morton and 3 more89 min
May 16, 1:15 PM CDTMesoscale DiscussionSPCDecatur, Gove, Graham, Lane, Logan, Ness and 8 more90 min
May 16, 2:41 PM CDTTornado WatchSPCClark, Decatur, Finney, Ford, Gove, Graham and 24 more5 hr
May 16, 3:04 PM CDTMesoscale DiscussionSPCButler, Cowley, Elk, Greenwood, Sedgwick, Sumner86 min
May 16, 3:34 PM CDTMesoscale DiscussionSPCAtchison, Brown, Chase, Coffey, Doniphan, Douglas and 14 more86 min
May 16, 5:12 PM CDTMesoscale DiscussionSPCDecatur, Finney, Ford, Gove, Graham, Grant and 21 more93 min
May 16, 5:46 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Brown, Chase and 20 more59 min
May 16, 5:57 PM CDTTornado WatchSPCAnderson, Atchison, Brown, Coffey, Doniphan, Douglas and 10 more5 hr
May 16, 6:16 PM CDTMesoscale DiscussionSPCButler, Chautauqua, Cowley, Elk, Greenwood, Harper and 3 more59 min
May 16, 6:23 PM CDTMesoscale DiscussionSPCDecatur, Ellis, Ford, Gove, Graham, Gray and 10 more97 min
May 16, 6:36 PM CDTTornado WatchSPCAllen, Butler, Chautauqua, Cowley, Elk, Greenwood and 6 more5 hr
May 15, 10:53 PM CDTSevere Thunderstorm WatchSPCBeaver5 hr
May 16, 1:32 AM CDTMesoscale DiscussionSPCBeaver, Ellis, Harmon88 min
May 16, 11:57 AM CDTMesoscale DiscussionSPCBeckham, Greer, Harmon, Jackson, Kiowa, Tillman2 hr
May 16, 12:58 PM CDTTornado WatchSPCBeaver, Beckham, Greer, Harmon, Jackson, Roger Mills and 2 more6 hr
May 16, 3:41 PM CDTMesoscale DiscussionSPCAlfalfa, Atoka, Beckham, Blaine, Bryan, Caddo and 42 more94 min
May 16, 4:00 PM CDTTornado WatchSPCAlfalfa, Atoka, Blaine, Bryan, Caddo, Canadian and 37 more8 hr
May 16, 5:55 PM CDTMesoscale DiscussionSPCAlfalfa, Beaver, Beckham, Blaine, Bryan, Caddo and 40 more95 min
May 16, 2:43 PM CDTMesoscale DiscussionSPCCallahan, Coke, Coleman, Concho, Crockett, Glasscock and 18 more92 min
May 16, 5:47 PM CDTTornado WatchSPCBrown, Callahan, Coke, Coleman, Comanche, Cooke and 21 more5 hr

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.