Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 543

April 23, 200710 counties in Kansas; 7 counties in Oklahoma; 21 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 23, 2007, 2:02 PM CDT for 10 counties in Kansas; 7 counties in Oklahoma; 21 counties in Texas. It was in force for 103 min.

The area

The outline as issued.

The facts

Issued: Apr 23, 2007, 2:02 PM CDT (19:02 UTC)
Expired: Apr 23, 2007, 3:45 PM CDT
In force: 103 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...tornado watch likely

All 38 counties

Clark County, KS, Grant County, KS, Gray County, KS, Hamilton County, KS, Haskell County, KS, Kearny County, KS, Meade County, KS, Seward County, KS, Stanton County, KS, Stevens County, KS, Beaver County, OK, Beckham County, OK, Ellis County, OK, Harmon County, OK, Harper County, OK, Roger Mills County, OK, Texas County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Gray County, TX, Hall County, TX, Hansford County, TX, Hemphill County, TX, Hutchinson County, TX, King County, TX, Lipscomb County, TX, Motley County, TX, Ochiltree County, TX, Roberts County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 91 km from the middle of the area, began a volume at 19:04 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, 7.0 hours before the alert went out and 91 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2744 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 236 m²/s²
0-3 km storm-relative helicity: 234 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

Issued	Product	Office	Counties	Lasted
Apr 23, 3:44 PM CDT	Tornado Watch	SPC	Clark, Comanche, Edwards, Finney, Ford, Grant and 11 more	6 hr
Apr 23, 6:15 PM CDT	Mesoscale Discussion	SPC	Barber, Barton, Butler, Chautauqua, Cherokee, Cowley and 28 more	2 hr
Apr 23, 6:35 PM CDT	Tornado Watch	SPC	Barber, Barton, Butler, Cheyenne, Clark, Comanche and 45 more	4 hr
Apr 23, 5:19 PM CDT	Mesoscale Discussion	SPC	Borden, Coke, Concho, Cottle, Crosby, Dawson and 31 more	56 min
Apr 23, 5:35 PM CDT	Tornado Watch	SPC	Baylor, Borden, Callahan, Coke, Cottle, Crane and 34 more	5 hr
Apr 23, 5:40 PM CDT	Mesoscale Discussion	SPC	Crockett, Dimmit, Edwards, Kerr, Kimble, Kinney and 6 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2007 Mesoscale Discussions in Kansas, 2007 Mesoscale Discussions in Oklahoma, 2007 Every 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.