Alert archive / Oklahoma / Mesoscale Discussions in 2008

Mesoscale Discussion 995

May 23, 200821 counties in Oklahoma; Collingsworth County, Wheeler County, Texas

The Storm Prediction Center issued this mesoscale discussion at May 23, 2008, 11:51 PM CDT for 21 counties in Oklahoma; Collingsworth County, Wheeler County, Texas. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued: May 23, 2008, 11:51 PM CDT (04:51 UTC)
Expired: May 24, 2008, 12:45 AM CDT
In force: 54 min
Issued by: the Storm Prediction Center

All 23 counties

Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Logan County, OK, Major County, OK, Noble County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Collingsworth County, TX, Wheeler County, TX

The radar

The Altus AFB radar (KFDR), 141 km from the middle of the area, began a volume at 04:55 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 nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 4.9 hours before the alert went out and 168 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: 3014 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 768 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 189 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 9.2

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
May 23, 8:17 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beaver, Beckham, Blaine, Custer, Dewey and 20 more	58 min
May 23, 10:33 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beckham, Blaine, Custer, Dewey, Ellis and 10 more	57 min
May 24, 12:41 PM CDT	Mesoscale Discussion	SPC	Garfield, Kingfisher, Logan, Noble, Payne	64 min
May 24, 1:03 PM CDT	Tornado Watch	SPC	Alfalfa, Blaine, Canadian, Creek, Garfield, Grant and 11 more	6 hr
May 24, 2:48 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Caddo, Canadian, Cleveland, Creek and 15 more	87 min
May 24, 6:49 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Canadian, Creek, Custer, Dewey and 16 more	26 min
May 24, 6:53 PM CDT	Tornado Watch	SPC	Alfalfa, Blaine, Canadian, Creek, Custer, Dewey and 17 more	5 hr
May 24, 3:50 PM CDT	Mesoscale Discussion	SPC	Coke, Fisher, Haskell, Irion, Jones, Mitchell and 3 more	55 min
May 24, 5:19 PM CDT	Severe Thunderstorm Watch	SPC	Coke, Fisher, Glasscock, Haskell, Howard, Irion and 13 more	7 hr

Nearby

Mesoscale Discussions in Oklahoma, 2008 Mesoscale Discussions in Texas, 2008 Every mesoscale discussion in 2008

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.