Alert archive / Arkansas / Mesoscale Discussions in 2006
Mesoscale Discussion 593
The Storm Prediction Center issued this mesoscale discussion at Apr 20, 2006, 9:31 PM CDT for 4 states. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Apr 20, 2006, 9:31 PM CDT (02:31 UTC)
- Expired
- Apr 20, 2006, 11:00 PM CDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
All 76 counties
Arkansas County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleveland County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Jackson County, AR, Jefferson County, AR, Lee County, AR, Lincoln County, AR, Lonoke County, AR, Mississippi County, AR, Monroe County, AR, Nevada County, AR, Ouachita County, AR, Phillips County, AR, Pike County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, St. Francis County, AR, White County, AR, Woodruff County, AR, Dunklin County, MO, Pemiscot County, MO, Alcorn County, MS, Benton County, MS, Coahoma County, MS, DeSoto County, MS, Lafayette County, MS, Marshall County, MS, Panola County, MS, Quitman County, MS, Tate County, MS, Tippah County, MS, Tunica County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dickson County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lauderdale County, TN, Lewis County, TN, Madison County, TN, McNairy County, TN, Montgomery County, TN, Perry County, TN, Shelby County, TN, Stewart County, TN, Tipton County, TN, Wayne County, TN, Weakley County, TN
The radar
The Memphis radar (KNQA), 112 km from the middle of the area, began a volume at 02:34 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 00:00Z, 2.5 hours before the alert went out and 79 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.
- Mixed-layer CAPE
- 512 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 1181 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 7:35 PM CDT | Mesoscale Discussion | SPC | Arkansas, Chicot, Desha, Drew, Lincoln | 85 min |
| Apr 20, 10:00 PM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 33 more | 7 hr |
| Apr 21, 2:15 AM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Chicot, Desha, Drew and 5 more | 2 hr |
| Apr 21, 12:04 AM CDT | Mesoscale Discussion | SPC | Alcorn, Benton, Itawamba, Lafayette, Lee, Marshall and 8 more | 116 min |
| Apr 21, 5:00 AM CDT | Mesoscale Discussion | SPC | Alcorn, Benton, Calhoun, Chickasaw, DeSoto, Itawamba and 12 more | 60 min |
| Apr 21, 9:51 AM CDT | Mesoscale Discussion | SPC | Adams, Amite, Attala, Claiborne, Copiah, Covington and 25 more | 84 min |
| Apr 21, 10:16 AM CDT | Severe Thunderstorm Watch | SPC | Adams, Amite, Claiborne, Clarke, Copiah, Covington and 27 more | 6 hr |
| Apr 21, 12:52 PM CDT | Mesoscale Discussion | SPC | Amite, Clarke, Copiah, Covington, Forrest, George and 26 more | 83 min |
| Apr 21, 1:24 PM CDT | Severe Thunderstorm Watch | SPC | Clay, George, Greene, Harrison, Jackson, Lowndes and 6 more | 8 hr |
| Apr 21, 12:17 PM CDT | Mesoscale Discussion | SPC | Anderson, Bledsoe, Blount, Bradley, Cumberland, Franklin and 16 more | 88 min |
| Apr 21, 3:33 PM CDT | Tornado Watch | SPC | Anderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 17 more | 6 hr |
| Apr 21, 6:22 PM CDT | Mesoscale Discussion | SPC | Cocke, Greene, Unicoi | 83 min |
Nearby
Mesoscale Discussions in Arkansas, 2006Mesoscale Discussions in Tennessee, 2006Mesoscale Discussions in Mississippi, 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.