Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 867

May 23, 20075 states

The Storm Prediction Center issued this mesoscale discussion at May 23, 2007, 1:20 PM MDT for 5 states. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
May 23, 2007, 1:20 PM MDT (19:20 UTC)
Expired
May 23, 2007, 2:15 PM MDT
In force
55 min
Issued by
the Storm Prediction Center
All 52 counties

Baca County, CO, Bent County, CO, Prowers County, CO, Clark 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, Lane County, KS, Meade County, KS, Morton County, KS, Scott County, KS, Seward County, KS, Stanton County, KS, Stevens County, KS, Wichita County, KS, Union County, NM, Beaver County, OK, Cimarron County, OK, Ellis County, OK, Harper County, OK, Roger Mills County, OK, Texas County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Collingsworth County, TX, Dallam County, TX, Deaf Smith County, TX, Donley County, TX, Gray County, TX, Hall County, TX, Hansford County, TX, Hartley County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore 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

The radar

The Amarillo radar (KAMA), 150 km from the middle of the area, began a volume at 19:23 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 12:00Z, 7.3 hours before the alert went out and 150 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 2007-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 16 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 2007-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 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
16 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
726 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
107 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

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 23, 3:33 PM MDTMesoscale DiscussionSPCBaca, Bent, Las Animas, Otero, Prowers2 hr
May 22, 8:41 PM MDTMesoscale DiscussionSPCEllis, Finney, Jewell, Ness, Osborne, Pawnee and 6 more94 min
May 22, 9:49 PM MDTSevere Thunderstorm WatchSPCBarton, Cloud, Ellis, Ellsworth, Jewell, Lincoln and 12 more5 hr
May 23, 1:27 AM MDTMesoscale DiscussionSPCCloud, Ellsworth, Lincoln, Ottawa, Republic93 min
May 23, 11:22 AM MDTMesoscale DiscussionSPCBarber, Clay, Cloud, Comanche, Dickinson, Ellsworth and 13 more83 min
May 23, 12:27 PM MDTSevere Thunderstorm WatchSPCBarber, Barton, Brown, Clay, Comanche, Dickinson and 24 more7 hr
May 23, 2:11 PM MDTMesoscale DiscussionSPCBarber, Brown, Dickinson, Ellsworth, Geary, Harvey and 12 more94 min
May 23, 2:31 PM MDTTornado Watch PDSSPCBarber, Clark, Comanche, Edwards, Finney, Ford and 19 more7 hr
May 23, 4:19 PM MDTMesoscale DiscussionSPCAtchison, Barton, Brown, Clay, Cloud, Dickinson and 28 more86 min
May 23, 5:06 PM MDTMesoscale DiscussionSPCClark, Comanche, Edwards, Finney, Ford, Grant and 12 more84 min

Nearby

Mesoscale Discussions in Texas, 2007Mesoscale Discussions in Kansas, 2007Mesoscale Discussions in Oklahoma, 2007Every mesoscale discussion in 2007

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.