Alert archive / Oklahoma / Mesoscale Discussions in 2003

Mesoscale Discussion 858

May 8, 200316 counties in Kansas; 31 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 8, 2003, 3:34 PM CDT for 16 counties in Kansas; 31 counties in Oklahoma. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
May 8, 2003, 3:34 PM CDT (20:34 UTC)
Expired
May 8, 2003, 5:30 PM CDT
In force
116 min
Issued by
the Storm Prediction Center
All 47 counties

Butler County, KS, Chase County, KS, Chautauqua County, KS, Coffey County, KS, Cowley County, KS, Elk County, KS, Greenwood County, KS, Harper County, KS, Harvey County, KS, Kingman County, KS, Lyon County, KS, Marion County, KS, McPherson County, KS, Reno County, KS, Sedgwick County, KS, Sumner County, KS, Alfalfa County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Creek County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Jefferson County, OK, Johnston County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Okfuskee 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

The radar

The Vance AFB radar (KVNX), 70 km from the middle of the area, began a volume at 20:37 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

Norman, OK (KOUN), launched 12:00Z, 8.6 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-pSkew-T log-p diagram, Norman, OK at 12:00Z on 2003-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2594 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 12:00Z on 2003-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 164 square meters per square second.1939587897Sfc1 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
2594 J/kg
Mixed-layer CIN
-55 J/kg
Mixed-layer LCL
646 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
164 m²/s²
0-3 km storm-relative helicity
213 m²/s²
Significant tornado parameter
3.1
Supercell composite
11.0

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 7, 7:01 PM CDTMesoscale DiscussionSPCCheyenne, Greeley, Sherman, Wallace, Wichita89 min
May 8, 1:18 AM CDTMesoscale DiscussionSPCAllen, Barber, Barton, Bourbon, Butler, Chautauqua and 21 more3 hr
May 8, 1:55 AM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Barber, Barton, Bourbon, Butler and 44 more5 hr
May 8, 3:51 AM CDTMesoscale DiscussionSPCAtchison, Barber, Barton, Bourbon, Brown, Butler and 50 more3 hr
May 8, 4:15 AM CDTSevere Thunderstorm WatchSPCAtchison, Brown, Clay, Cloud, Doniphan, Douglas and 19 more7 hr
May 8, 7:50 AM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Jackson, Jefferson, Leavenworth and 6 more85 min
May 8, 7:55 AM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Jackson, Jefferson, Leavenworth and 6 more95 min
May 8, 12:49 PM CDTMesoscale DiscussionSPCHarper, Sumner3 hr
May 8, 1:07 PM CDTMesoscale DiscussionSPCBarton, Clay, Cloud, Dickinson, Ellis, Ellsworth and 16 more2 hr
May 8, 1:10 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Graham, Norton, Rawlins, Sheridan and 2 more2 hr
May 8, 1:30 PM CDTTornado WatchSPCCheyenne, Decatur, Gove, Graham, Logan, Norton and 6 more6 hr
May 8, 1:35 PM CDTTornado WatchSPCButler, Chautauqua, Cowley, Elk, Greenwood, Harper and 5 more7 hr
May 8, 1:50 PM CDTTornado WatchSPCAnderson, Atchison, Brown, Chase, Clay, Cloud and 31 more7 hr
May 8, 3:26 PM CDTMesoscale DiscussionSPCBrown, Clay, Cloud, Dickinson, Ellsworth, Geary and 22 more2 hr
May 8, 3:35 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Gove, Graham, Logan, Norton and 6 more115 min
May 8, 4:16 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Cherokee, Crawford and 11 more29 min
May 8, 4:40 PM CDTTornado WatchSPCAllen, Anderson, Atchison, Bourbon, Cherokee, Crawford and 13 more6 hr
May 8, 6:38 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Brown, Butler and 46 more2 hr
May 7, 8:01 PM CDTMesoscale DiscussionSPCBeckham, Caddo, Comanche, Cotton, Greer, Harmon and 4 more59 min
May 7, 10:35 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Cherokee, Cleveland and 29 more55 min
May 7, 10:35 PM CDTTornado WatchSPCBeckham, Bryan, Carter, Coal, Comanche, Cotton and 13 more5 hr
May 7, 10:55 PM CDTSevere Thunderstorm WatchSPCAdair, Alfalfa, Beckham, Blaine, Caddo, Canadian and 39 more5 hr
May 7, 11:51 PM CDTMesoscale DiscussionSPCBeckham, Bryan, Carter, Coal, Comanche, Cotton and 13 more54 min
May 8, 1:57 AM CDTMesoscale DiscussionSPCAtoka, Beckham, Bryan, Carter, Coal, Comanche and 14 more2 hr
May 8, 3:50 AM CDTSevere Thunderstorm WatchSPCAdair, Atoka, Bryan, Cherokee, Choctaw, Coal and 25 more3 hr
May 8, 5:02 AM CDTMesoscale DiscussionSPCAdair, Atoka, Cherokee, Choctaw, Coal, Creek and 24 more2 hr
May 8, 6:20 AM CDTTornado WatchSPCHaskell, Latimer, LeFlore, Sequoyah3 hr
May 8, 4:47 PM CDTMesoscale DiscussionSPCCanadian, Cleveland, Grady, Lincoln, Logan, McClain and 3 more58 min
May 8, 5:31 PM CDTMesoscale DiscussionSPCAdair, Cherokee, Coal, Craig, Creek, Delaware and 17 more59 min
May 8, 5:45 PM CDTTornado WatchSPCAdair, Cherokee, Coal, Craig, Delaware, Haskell and 17 more5 hr

Nearby

Mesoscale Discussions in Oklahoma, 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.