Alert archive / Oklahoma / Mesoscale Discussions in 2006

Mesoscale Discussion 814

May 9, 20064 states

The Storm Prediction Center issued this mesoscale discussion at May 9, 2006, 6:30 PM CDT for 4 states. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
May 9, 2006, 6:30 PM CDT (23:30 UTC)
Expired
May 9, 2006, 8:00 PM CDT
In force
90 min
Issued by
the Storm Prediction Center
All 41 counties

Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Fulton County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Sebastian County, AR, Washington County, AR, Howell County, MO, Oregon County, MO, Ozark County, MO, Ripley County, MO, Taney County, MO, Adair County, OK, Atoka County, OK, Bryan County, OK, Cherokee County, OK, Choctaw County, OK, Coal County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Marshall County, OK, McCurtain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Seminole County, OK, Sequoyah County, OK, Lamar County, TX

The radar

The Western Arkansas radar (KSRX), 23 km from the middle of the area, began a volume at 23:32 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, 11.5 hours before the alert went out and 164 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 2006-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 572 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 2006-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 195 square meters per square second.193958Sfc1 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
572 J/kg
Mixed-layer CIN
-109 J/kg
Mixed-layer LCL
735 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
195 m²/s²
0-3 km storm-relative helicity
140 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

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.

IssuedProductOfficeCountiesLasted
May 9, 4:24 AM CDTSevere Thunderstorm WatchSPCBenton, Carroll, Madison, Washington4 hr
May 9, 6:22 AM CDTSevere Thunderstorm WatchSPCBaxter, Boone, Fulton, Independence, Izard, Marion and 4 more6 hr
May 9, 10:00 AM CDTMesoscale DiscussionSPCClay, Craighead, Crittenden, Greene, Jackson, Lawrence and 4 more2 hr
May 9, 10:05 AM CDTSevere Thunderstorm WatchSPCClay, Craighead, Crittenden, Cross, Greene, Lawrence and 4 more5 hr
May 9, 10:46 AM CDTSevere Thunderstorm WatchSPCArkansas, Clark, Cleburne, Cleveland, Conway, Dallas and 17 more4 hr
May 9, 4:46 PM CDTMesoscale DiscussionSPCBenton, Boone, Carroll, Madison, Washington89 min
May 9, 5:07 PM CDTTornado WatchSPCBaxter, Benton, Boone, Carroll, Crawford, Franklin and 10 more6 hr
May 8, 7:47 PM CDTMesoscale DiscussionSPCAtchison, Holt, Nodaway58 min
May 8, 10:59 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Gentry, Holt, Nodaway and 1 more91 min
May 9, 1:13 AM CDTMesoscale DiscussionSPCAlfalfa, Craig, Grant, Kay, Mayes, Noble and 6 more92 min
May 9, 3:45 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Cleveland, Coal and 24 more2 hr
May 9, 4:04 PM CDTTornado WatchSPCAtoka, Bryan, Choctaw, Coal, Haskell, Hughes and 12 more7 hr
May 9, 4:56 PM CDTMesoscale DiscussionSPCBeaver, Beckham, Custer, Dewey, Ellis, Harper and 5 more2 hr
May 9, 6:01 PM CDTSevere Thunderstorm WatchSPCBeaver, Beckham, Custer, Dewey, Ellis, Greer and 8 more7 hr
May 8, 7:42 PM CDTMesoscale DiscussionSPCNewton93 min
May 9, 4:08 PM CDTMesoscale DiscussionSPCBandera, Blanco, Burnet, Comal, Edwards, Gillespie and 11 more97 min
May 9, 6:30 PM CDTSevere Thunderstorm WatchSPCAtascosa, Bandera, Bell, Bexar, Blanco, Burnet and 27 more4 hr

Nearby

Mesoscale Discussions in Oklahoma, 2006Mesoscale Discussions in Arkansas, 2006Mesoscale Discussions in Missouri, 2006Every mesoscale discussion in 2006

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.