Alert archive / Oklahoma / Mesoscale Discussions in 2006

Mesoscale Discussion 820

May 10, 200620 counties in Arkansas; 34 counties in Oklahoma; 14 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 10, 2006, 4:01 AM CDT for 20 counties in Arkansas; 34 counties in Oklahoma; 14 counties in Texas. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued
May 10, 2006, 4:01 AM CDT (09:01 UTC)
Expired
May 10, 2006, 5:30 AM CDT
In force
89 min
Issued by
the Storm Prediction Center
All 68 counties

Clark County, AR, Crawford County, AR, Franklin County, AR, Garland County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Johnson County, AR, Little River County, AR, Logan County, AR, Miller County, AR, Montgomery County, AR, Nevada County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Yell County, AR, Atoka County, OK, Bryan County, OK, Caddo County, OK, Carter County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Haskell County, OK, Hughes County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kiowa County, OK, Latimer County, OK, LeFlore County, OK, Love County, OK, Marshall County, OK, McClain County, OK, McCurtain County, OK, McIntosh County, OK, Murray County, OK, Okfuskee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Seminole County, OK, Sequoyah County, OK, Stephens County, OK, Tillman County, OK, Bowie County, TX, Collin County, TX, Cooke County, TX, Delta County, TX, Fannin County, TX, Franklin County, TX, Grayson County, TX, Hopkins County, TX, Hunt County, TX, Lamar County, TX, Montague County, TX, Morris County, TX, Red River County, TX, Titus County, TX

The radar

The Norman radar (KTLX), 142 km from the middle of the area, began a volume at 09:02 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 00:00Z, 9.0 hours before the alert went out and 142 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 2006-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3059 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 2006-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 116 square meters per square second.19395878Sfc1 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
3059 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
905 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
116 m²/s²
0-3 km storm-relative helicity
313 m²/s²
Significant tornado parameter
4.2
Supercell composite
16.6

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, 9:18 PM CDTTornado WatchSPCHempstead, Howard, Johnson, Little River, Logan, Miller and 7 more6 hr
May 9, 11:14 PM CDTSevere Thunderstorm WatchSPCArkansas, Bradley, Calhoun, Clark, Cleburne, Cleveland and 22 more5 hr
May 10, 12:41 AM CDTSevere Thunderstorm WatchSPCAshley, Chicot, Craighead, Crittenden, Cross, Lee and 4 more7 hr
May 10, 4:24 AM CDTSevere Thunderstorm WatchSPCArkansas, Bradley, Calhoun, Clark, Cleburne, Cleveland and 42 more8 hr
May 10, 6:27 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 39 more93 min
May 10, 10:57 AM CDTMesoscale DiscussionSPCAshley, Bradley, Chicot, Union2 hr
May 10, 11:09 AM CDTSevere Thunderstorm WatchSPCAshley, Chicot, Phillips3 hr
May 9, 8:06 PM CDTMesoscale DiscussionSPCBeckham, Caddo, Canadian, Comanche, Cotton, Custer and 9 more84 min
May 9, 9:38 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Caddo, Carter, Choctaw, Cleveland and 25 more97 min
May 9, 10:46 PM CDTSevere Thunderstorm WatchSPCAtoka, Bryan, Caddo, Canadian, Carter, Choctaw and 22 more7 hr
May 10, 5:18 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Cotton, Jefferson and 6 more87 min
May 10, 12:50 PM CDTMesoscale DiscussionSPCAngelina, Nacogdoches, Panola, Sabine, San Augustine, Shelby and 1 more115 min
May 10, 1:13 PM CDTTornado WatchSPCAngelina, Cherokee, Hardin, Jasper, Nacogdoches, Newton and 6 more8 hr
May 10, 2:34 PM CDTMesoscale DiscussionSPCAransas, Austin, Bee, Brazoria, Brooks, Calhoun and 26 more116 min
May 10, 2:59 PM CDTSevere Thunderstorm WatchSPCAustin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 11 more5 hr
May 10, 3:20 PM CDTSevere Thunderstorm WatchSPCAransas, Bee, Brooks, Calhoun, Cameron, DeWitt and 15 more7 hr
May 10, 5:04 PM CDTMesoscale DiscussionSPCBrazoria, Calhoun, Chambers, Colorado, Fort Bend, Galveston and 5 more116 min
May 10, 6:06 PM CDTMesoscale DiscussionSPCAransas, Brooks, Hidalgo, Jim Hogg, Jim Wells, Kenedy and 6 more114 min

Nearby

Mesoscale Discussions in Oklahoma, 2006Mesoscale Discussions in Arkansas, 2006Mesoscale Discussions in Texas, 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.