Alert archive / Oklahoma / Mesoscale Discussions in 2003

Mesoscale Discussion 864

May 8, 200310 counties in Arkansas; 4 counties in Missouri; 23 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 8, 2003, 5:31 PM CDT for 10 counties in Arkansas; 4 counties in Missouri; 23 counties in Oklahoma. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued
May 8, 2003, 5:31 PM CDT (22:31 UTC)
Expired
May 8, 2003, 6:30 PM CDT
In force
59 min
Issued by
the Storm Prediction Center
All 37 counties

Benton County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Scott County, AR, Sebastian County, AR, Washington County, AR, Barry County, MO, McDonald County, MO, Newton County, MO, Stone County, MO, Adair County, OK, Cherokee County, OK, Coal County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Haskell County, OK, Hughes County, OK, Latimer County, OK, LeFlore County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Ottawa County, OK, Pittsburg County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 52 km from the middle of the area, began a volume at 22:31 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

Springfield, MO (KSGF), launched 12:00Z, 10.5 hours before the alert went out and 190 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, Springfield, MO at 12:00Z on 2003-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 41 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, Springfield, MO at 12:00Z on 2003-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 501 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
41 J/kg
Mixed-layer CIN
-340 J/kg
Mixed-layer LCL
1727 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
501 m²/s²
0-3 km storm-relative helicity
564 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.

IssuedProductOfficeCountiesLasted
May 8, 1:18 AM CDTMesoscale DiscussionSPCBenton, Garland, Grant, Hot Spring, Lincoln, Montgomery and 2 more3 hr
May 8, 1:55 AM CDTSevere Thunderstorm WatchSPCBenton, Carroll5 hr
May 8, 5:02 AM CDTMesoscale DiscussionSPCCrawford, Franklin, Howard, Johnson, Logan, Madison and 8 more2 hr
May 8, 6:20 AM CDTTornado WatchSPCCrawford, Franklin, Logan, Montgomery, Scott, Sebastian and 1 more3 hr
May 8, 7:33 AM CDTMesoscale DiscussionSPCCrawford, Franklin, Johnson, Logan, Montgomery, Scott and 2 more87 min
May 8, 8:25 AM CDTTornado WatchSPCBaxter, Boone, Cleburne, Conway, Craighead, Crittenden and 18 more5 hr
May 8, 9:55 AM CDTMesoscale DiscussionSPCMississippi3 hr
May 8, 10:21 AM CDTMesoscale DiscussionSPCClay, Cleburne, Craighead, Greene, Independence, Izard and 8 more84 min
May 8, 10:25 AM CDTTornado WatchSPCClay, Craighead, Crittenden, Cross, Greene, Mississippi and 3 more6 hr
May 8, 11:59 AM CDTMesoscale DiscussionSPCClay, Cleburne, Craighead, Greene, Independence, Izard and 8 more2 hr
May 8, 12:24 PM CDTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Mississippi and 2 more2 hr
May 8, 5:45 PM CDTTornado WatchSPCBenton, Crawford, Sebastian, Washington5 hr
May 8, 6:38 PM CDTMesoscale DiscussionSPCBenton, Crawford, Washington2 hr
May 8, 3:51 AM CDTMesoscale DiscussionSPCAndrew, Atchison, Barry, Barton, Benton, Buchanan and 32 more3 hr
May 8, 4:15 AM CDTSevere Thunderstorm WatchSPCAdair, Andrew, Atchison, Buchanan, Caldwell, Carroll and 27 more7 hr
May 8, 7:50 AM CDTMesoscale DiscussionSPCAdair, Andrew, Atchison, Buchanan, Caldwell, Carroll and 27 more85 min
May 8, 7:55 AM CDTMesoscale DiscussionSPCAdair, Andrew, Atchison, Buchanan, Caldwell, Carroll and 27 more95 min
May 8, 12:20 PM CDTSevere Thunderstorm WatchSPCAudrain, Franklin, Iron, Jefferson, Lincoln, Macon and 14 more4 hr
May 8, 1:50 PM CDTTornado WatchSPCAtchison7 hr
May 8, 2:11 PM CDTMesoscale DiscussionSPCAudrain, Knox, Lewis, Lincoln, Macon, Marion and 10 more2 hr
May 8, 4:16 PM CDTMesoscale DiscussionSPCAndrew, Barton, Bates, Benton, Buchanan, Caldwell and 35 more29 min
May 8, 4:40 PM CDTTornado WatchSPCAndrew, Barton, Bates, Buchanan, Caldwell, Carroll and 24 more6 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, 12:49 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Garfield, Grant, Kingfisher, Kiowa and 1 more3 hr
May 8, 1:35 PM CDTTornado WatchSPCAlfalfa, Blaine, Caddo, Canadian, Carter, Cleveland and 24 more7 hr
May 8, 3:34 PM CDTMesoscale DiscussionSPCAlfalfa, Caddo, Canadian, Carter, Cleveland, Comanche and 25 more116 min
May 8, 4:47 PM CDTMesoscale DiscussionSPCCanadian, Cleveland, Grady, Lincoln, Logan, McClain and 3 more58 min

Nearby

Mesoscale Discussions in Oklahoma, 2003Mesoscale Discussions in Arkansas, 2003Mesoscale Discussions in Missouri, 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.