Alert archive / Arkansas / Mesoscale Discussions in 2008

Mesoscale Discussion 773

May 2, 20087 states

The Storm Prediction Center issued this mesoscale discussion at May 2, 2008, 12:12 PM CDT for 7 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 2, 2008, 12:12 PM CDT (17:12 UTC)
Expired
May 2, 2008, 2:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 112 counties

Arkansas County, AR, Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Cleveland County, AR, Columbia County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Desha County, AR, Drew County, AR, Jefferson County, AR, Lee County, AR, Lincoln County, AR, Mississippi County, AR, Monroe County, AR, Ouachita County, AR, Phillips County, AR, Poinsett County, AR, Prairie County, AR, St. Francis County, AR, Union County, AR, Woodruff County, AR, Alexander County, IL, Gallatin County, IL, Hardin County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Union County, IL, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Bienville Parish, LA, Bossier Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, East Carroll Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Richland Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Scott County, MO, Benton County, MS, Bolivar County, MS, Carroll County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Humphreys County, MS, Issaquena County, MS, Lafayette County, MS, Leflore County, MS, Marshall County, MS, Panola County, MS, Quitman County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tunica County, MS, Union County, MS, Washington County, MS, Yalobusha County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Obion County, TN, Shelby County, TN, Stewart County, TN, Tipton County, TN, Weakley County, TN

The radar

The Memphis radar (KNQA), 105 km from the middle of the area, began a volume at 17:11 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

Little Rock, AR (KLZK), launched 12:00Z, 5.2 hours before the alert went out and 77 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, Little Rock, AR at 12:00Z on 2008-05-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1314 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, Little Rock, AR at 12:00Z on 2008-05-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 532 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
1314 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
609 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
532 m²/s²
0-3 km storm-relative helicity
505 m²/s²
Significant tornado parameter
3.8
Supercell composite
15.3

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 2, 1:09 AM CDTTornado WatchSPCBenton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more7 hr
May 2, 4:22 AM CDTMesoscale DiscussionSPCBoone, Carroll, Crawford, Franklin, Johnson, Logan and 6 more53 min
May 2, 5:00 AM CDTSevere Thunderstorm WatchSPCBaxter, Boone, Clark, Cleburne, Conway, Faulkner and 25 more5 hr
May 2, 7:07 AM CDTMesoscale DiscussionSPCCleburne, Conway, Faulkner, Fulton, Hot Spring, Izard and 5 more53 min
May 2, 8:49 AM CDTTornado WatchSPCArkansas, Bradley, Calhoun, Clark, Clay, Cleburne and 43 more6 hr
May 2, 10:20 AM CDTMesoscale DiscussionSPCArkansas, Calhoun, Clark, Clay, Cleveland, Craighead and 23 more85 min
May 2, 1:54 PM CDTTornado WatchSPCArkansas, Ashley, Bradley, Chicot, Crittenden, Cross and 8 more6 hr
May 2, 3:35 PM CDTMesoscale DiscussionSPCArkansas, Crittenden, Cross, Desha, Drew, Lee and 4 more85 min
May 2, 5:18 PM CDTTornado WatchSPCColumbia, Union6 hr
May 2, 9:48 AM CDTMesoscale DiscussionSPCChampaign, Clark, Clay, Coles, Crawford, Cumberland and 13 more117 min
May 2, 10:44 AM CDTTornado WatchSPCAlexander, Edwards, Gallatin, Hamilton, Hardin, Johnson and 7 more9 hr
May 2, 11:05 AM CDTMesoscale DiscussionSPCJo Daviess115 min
May 2, 3:05 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Champaign, DeKalb, DeWitt and 30 more115 min
May 2, 2:21 PM CDTMesoscale DiscussionSPCAscension, Assumption, Avoyelles, Catahoula, Concordia, East Baton Rouge and 23 more114 min
May 2, 4:43 PM CDTTornado WatchSPCAttala, Carroll, Chickasaw, Choctaw, Clay, Holmes and 16 more7 hr
May 1, 7:24 PM CDTMesoscale DiscussionSPCAndrew, Bates, Buchanan, Caldwell, Cass, Clay and 12 more66 min
May 1, 10:04 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Barton, Bates, Buchanan, Caldwell and 34 more116 min
May 1, 11:29 PM CDTMesoscale DiscussionSPCAdair, Andrew, Audrain, Barton, Bates, Benton and 59 more91 min
May 2, 12:53 AM CDTTornado WatchSPCAdair, Andrew, Barry, Barton, Bates, Benton and 46 more6 hr

Nearby

Mesoscale Discussions in Arkansas, 2008Mesoscale Discussions in Mississippi, 2008Mesoscale Discussions in Tennessee, 2008Every mesoscale discussion in 2008

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.