Alert archive / Kentucky / Mesoscale Discussions in 2011
Mesoscale Discussion 551
The Storm Prediction Center issued this mesoscale discussion at Apr 24, 2011, 3:01 PM CDT for 4 states. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2011, 3:01 PM CDT (20:01 UTC)
- Expired
- Apr 24, 2011, 4:30 PM CDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
All 83 counties
Alexander County, IL, Hardin County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Adair County, KY, Allen County, KY, Ballard County, KY, Barren County, KY, Bell County, KY, Boyle County, KY, Butler County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Casey County, KY, Christian County, KY, Clay County, KY, Clinton County, KY, Crittenden County, KY, Cumberland County, KY, Edmonson County, KY, Estill County, KY, Fulton County, KY, Garrard County, KY, Graves County, KY, Grayson County, KY, Green County, KY, Hardin County, KY, Hart County, KY, Hickman County, KY, Hopkins County, KY, Jackson County, KY, Knox County, KY, Larue County, KY, Laurel County, KY, Lincoln County, KY, Livingston County, KY, Logan County, KY, Lyon County, KY, Madison County, KY, Marion County, KY, Marshall County, KY, McCracken County, KY, McCreary County, KY, McLean County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Ohio County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Simpson County, KY, Taylor County, KY, Todd County, KY, Trigg County, KY, Warren County, KY, Washington County, KY, Wayne County, KY, Webster County, KY, Whitley County, KY, Mississippi County, MO, New Madrid County, MO, Scott County, MO, Cheatham County, TN, Clay County, TN, Fentress County, TN, Henry County, TN, Houston County, TN, Jackson County, TN, Macon County, TN, Montgomery County, TN, Obion County, TN, Overton County, TN, Pickett County, TN, Robertson County, TN, Scott County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Weakley County, TN
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 8.0 hours before the alert went out and 93 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
- 1536 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 557 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 163 m²/s²
- 0-3 km storm-relative helicity
- 219 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 5.8
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 23, 8:09 PM CDT | Mesoscale Discussion | SPC | Alexander, Johnson, Pulaski, Union, Williamson | 2 hr |
| Apr 23, 10:40 PM CDT | Mesoscale Discussion | SPC | Ballard, Carlisle, Fulton, Graves, Hickman, McCracken | 95 min |
| Apr 23, 8:19 PM CDT | Tornado Watch | SPC | Dunklin, Pemiscot | 4 hr |
| Apr 24, 11:58 AM CDT | Mesoscale Discussion | SPC | Butler, Carter, Dunklin, New Madrid, Oregon, Pemiscot and 3 more | 62 min |
| Apr 24, 6:23 PM CDT | Mesoscale Discussion | SPC | Dunklin, Pemiscot | 2 hr |
Nearby
Mesoscale Discussions in Kentucky, 2011Mesoscale Discussions in Tennessee, 2011Mesoscale Discussions in Illinois, 2011Every mesoscale discussion in 2011
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.