Alert archive / Oklahoma / Mesoscale Discussions in 2003

Mesoscale Discussion 868

May 8, 200311 counties in Kansas; 31 counties in Oklahoma; 28 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 8, 2003, 8:30 PM CDT for 11 counties in Kansas; 31 counties in Oklahoma; 28 counties in Texas. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued
May 8, 2003, 8:30 PM CDT (01:30 UTC)
Expired
May 8, 2003, 9:30 PM CDT
In force
60 min
Issued by
the Storm Prediction Center
All 70 counties

Butler County, KS, Chautauqua County, KS, Cowley County, KS, Elk County, KS, Greenwood County, KS, Harper County, KS, Harvey County, KS, Kingman County, KS, Reno County, KS, Sedgwick County, KS, Sumner County, KS, Alfalfa County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Jefferson County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Major County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Brown County, TX, Callahan County, TX, Clay County, TX, Coleman County, TX, Comanche County, TX, Cooke County, TX, Denton County, TX, Eastland County, TX, Erath County, TX, Hamilton County, TX, Hood County, TX, Jack County, TX, Jones County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Runnels County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Taylor County, TX, Throckmorton County, TX, Wichita County, TX, Wise County, TX, Young County, TX

The radar

The Norman radar (KTLX), 84 km from the middle of the area, began a volume at 01:29 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

Norman, OK (KOUN), launched 00:00Z, 1.5 hours before the alert went out and 67 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, Norman, OK at 00:00Z on 2003-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3798 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, Norman, OK at 00:00Z on 2003-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 330 square meters per square second.1939587897117Sfc1 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
3798 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
929 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
330 m²/s²
0-3 km storm-relative helicity
364 m²/s²
Significant tornado parameter
8.2
Supercell composite
31.1

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, 7:13 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Cherokee, Crawford and 13 more2 hr
May 9, 4:17 PM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Crawford, Labette, Linn and 4 more28 min
May 9, 4:45 PM CDTTornado WatchSPCAllen, Bourbon, Chautauqua, Cherokee, Crawford, Labette and 5 more6 hr
May 8, 11:14 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Coal, Garvin, Haskell and 16 more91 min
May 9, 2:52 PM CDTMesoscale DiscussionSPCCaddo, Carter, Cleveland, Comanche, Cotton, Creek and 15 more113 min
May 9, 3:35 PM CDTTornado WatchSPCBlaine, Caddo, Canadian, Carter, Cleveland, Comanche and 18 more5 hr
May 9, 5:36 PM CDTMesoscale DiscussionSPCBlaine, Caddo, Canadian, Carter, Cleveland, Comanche and 17 more84 min
May 9, 9:08 AM CDTMesoscale DiscussionSPCBorden, Callahan, Coke, Dickens, Fisher, Foard and 16 more3 hr
May 9, 4:58 PM CDTMesoscale DiscussionSPCCallahan, Coke, Concho, Crockett, Fisher, Glasscock and 11 more32 min
May 9, 5:30 PM CDTSevere Thunderstorm WatchSPCCallahan, Coke, Crockett, Fisher, Irion, Jones and 10 more6 hr

Nearby

Mesoscale Discussions in Oklahoma, 2003Mesoscale Discussions in Texas, 2003Mesoscale Discussions in Kansas, 2003Every mesoscale discussion in 2003

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.