Alert archive / Kentucky / Mesoscale Discussions in 2009
Mesoscale Discussion 761
The Storm Prediction Center issued this mesoscale discussion at May 8, 2009, 1:08 PM EDT for Crawford County, Floyd County, Harrison County, Indiana; 60 counties in Kentucky; 29 counties in Tennessee. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- May 8, 2009, 1:08 PM EDT (17:08 UTC)
- Expired
- May 8, 2009, 2:45 PM EDT
- In force
- 97 min
- Issued by
- the Storm Prediction Center
All 92 counties
Crawford County, IN, Floyd County, IN, Harrison County, IN, Adair County, KY, Allen County, KY, Anderson County, KY, Barren County, KY, Bell County, KY, Bourbon County, KY, Boyle County, KY, Breathitt County, KY, Breckinridge County, KY, Bullitt County, KY, Casey County, KY, Clark County, KY, Clay County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Estill County, KY, Fayette County, KY, Franklin County, KY, Garrard County, KY, Grayson County, KY, Green County, KY, Hardin County, KY, Harrison County, KY, Hart County, KY, Jackson County, KY, Jefferson County, KY, Jessamine County, KY, Knox County, KY, Larue County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Lincoln County, KY, Madison County, KY, Marion County, KY, McCreary County, KY, Meade County, KY, Menifee County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Montgomery County, KY, Nelson County, KY, Oldham County, KY, Owsley County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Scott County, KY, Shelby County, KY, Spencer County, KY, Taylor County, KY, Warren County, KY, Washington County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Woodford County, KY, Anderson County, TN, Bledsoe County, TN, Campbell County, TN, Cannon County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, DeKalb County, TN, Fentress County, TN, Grundy County, TN, Jackson County, TN, Loudon County, TN, Macon County, TN, Meigs County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Smith County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, White County, TN, Wilson County, TN
The radar
The Nashville radar (KOHX), 140 km from the middle of the area, began a volume at 17:07 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
Nashville Metro, TN (KBNA), launched 12:00Z, 5.1 hours before the alert went out and 148 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
- 117 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 739 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 88 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 |
|---|---|---|---|---|
| May 8, 12:46 AM EDT | Mesoscale Discussion | SPC | Daviess, Gibson, Greene, Knox, Pike, Posey and 4 more | 89 min |
| May 8, 10:21 AM EDT | Tornado Watch | SPC | Gibson, Pike, Posey, Spencer, Vanderburgh, Warrick | 7 hr |
| May 8, 1:44 PM EDT | Severe Thunderstorm Watch | SPC | Clark, Crawford, Dubois, Floyd, Harrison, Jefferson and 5 more | 6 hr |
| May 8, 3:16 PM EDT | Mesoscale Discussion | SPC | Gibson, Pike, Posey, Spencer, Vanderburgh, Warrick | 89 min |
| May 7, 11:17 PM EDT | Severe Thunderstorm Watch | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 14 more | 8 hr |
| May 8, 4:34 AM EDT | Mesoscale Discussion | SPC | Adair, Allen, Ballard, Barren, Butler, Caldwell and 24 more | 56 min |
| May 8, 5:29 AM EDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Barren, Clinton, Cumberland, Logan and 5 more | 3 hr |
| May 8, 9:37 AM EDT | Mesoscale Discussion | SPC | Ballard, Calloway, Carlisle, Fulton, Graves, Hickman and 4 more | 53 min |
| May 8, 4:42 PM EDT | Tornado Watch | SPC | Adair, Bell, Breathitt, Clay, Clinton, Cumberland and 18 more | 7 hr |
| May 8, 6:03 PM EDT | Mesoscale Discussion | SPC | Bell, Boyd, Breathitt, Carter, Clay, Elliott and 20 more | 87 min |
| May 8, 4:24 PM EDT | Mesoscale Discussion | SPC | Bedford, Benton, Bledsoe, Cannon, Carroll, Cheatham and 32 more | 66 min |
| May 8, 6:32 PM EDT | Tornado Watch | SPC | Carter, Cocke, Greene, Hawkins, Johnson, Sullivan and 2 more | 7 hr |
Nearby
Mesoscale Discussions in Kentucky, 2009Mesoscale Discussions in Tennessee, 2009Mesoscale Discussions in Indiana, 2009Every mesoscale discussion in 2009
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.