Alert archive / Kentucky / Mesoscale Discussions in 2009
Mesoscale Discussion 99
The Storm Prediction Center issued this mesoscale discussion at Feb 11, 2009, 10:02 AM CST for 7 states. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Feb 11, 2009, 10:02 AM CST (16:02 UTC)
- Expired
- Feb 11, 2009, 11:30 AM CST
- In force
- 88 min
- Issued by
- the Storm Prediction Center
All 168 counties
Cullman County, AL, DeKalb County, AL, Jackson County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL, Winston County, AL, Catoosa County, GA, Chattooga County, GA, Dade County, GA, Fannin County, GA, Murray County, GA, Walker County, GA, Whitfield County, GA, Clark County, IN, Floyd County, IN, Harrison County, IN, Switzerland County, IN, Adair County, KY, Allen County, KY, Anderson County, KY, Barren County, KY, Bath County, KY, Bell County, KY, Bourbon County, KY, Boyle County, KY, Bracken County, KY, Breathitt County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Carroll County, KY, Casey County, KY, Clark County, KY, Clay County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Elliott County, KY, Estill County, KY, Fayette County, KY, Fleming County, KY, Franklin County, KY, Gallatin County, KY, Garrard County, KY, Grant County, KY, Grayson County, KY, Green County, KY, Hardin County, KY, Harlan County, KY, Harrison County, KY, Hart County, KY, Henry County, KY, Jackson County, KY, Jefferson County, KY, Jessamine County, KY, Knott County, KY, Knox County, KY, Larue County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Lewis County, KY, Lincoln County, KY, Logan County, KY, Madison County, KY, Magoffin County, KY, Marion County, KY, Mason County, KY, McCreary County, KY, Meade County, KY, Menifee County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Montgomery County, KY, Morgan County, KY, Muhlenberg County, KY, Nelson County, KY, Nicholas County, KY, Ohio County, KY, Oldham County, KY, Owen County, KY, Owsley County, KY, Pendleton County, KY, Perry County, KY, Powell County, KY, Pulaski County, KY, Robertson County, KY, Rockcastle County, KY, Rowan County, KY, Russell County, KY, Scott County, KY, Shelby County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Todd County, KY, Trimble County, KY, Warren County, KY, Washington County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Woodford County, KY, Cherokee County, NC, Graham County, NC, Anderson County, TN, Bedford County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Cannon County, TN, Cheatham County, TN, Claiborne County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Fentress County, TN, Franklin County, TN, Giles County, TN, Grainger County, TN, Grundy County, TN, Hamblen County, TN, Hamilton County, TN, Hancock County, TN, Jackson County, TN, Jefferson County, TN, Knox County, TN, Lawrence County, TN, Lincoln County, TN, Loudon County, TN, Macon County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Polk County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Robertson County, TN, Rutherford County, TN, Scott County, TN, Sequatchie County, TN, Sevier County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Union County, TN, Van Buren County, TN, Warren County, TN, White County, TN, Williamson County, TN, Wilson County, TN, Lee County, VA
The radar
The Nashville radar (KOHX), 96 km from the middle of the area, began a volume at 16:03 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, 4.0 hours before the alert went out and 102 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 722 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 510 m²/s²
- 0-3 km storm-relative helicity
- 444 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 11, 9:36 AM CST | Mesoscale Discussion | SPC | Autauga, Baldwin, Barbour, Bullock, Butler, Chambers and 26 more | 84 min |
| Feb 11, 11:10 AM CST | Tornado Watch | SPC | Bibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 19 more | 6 hr |
| Feb 11, 1:29 PM CST | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 13 more | 2 hr |
| Feb 11, 3:08 PM CST | Severe Thunderstorm Watch | SPC | Banks, Barrow, Butts, Clarke, Clayton, Cobb and 34 more | 5 hr |
| Feb 11, 10:38 AM CST | Tornado Watch | SPC | Clark, Crawford, Dearborn, Dubois, Floyd, Harrison and 13 more | 6 hr |
| Feb 11, 12:35 PM CST | Mesoscale Discussion | SPC | Clark, Dearborn, Floyd, Harrison, Jackson, Jefferson and 6 more | 85 min |
| Feb 11, 12:59 PM CST | Tornado Watch | SPC | Fayette, Franklin, Union | 7 hr |
| Feb 11, 2:16 PM CST | Mesoscale Discussion | SPC | Bartholomew, Benton, Blackford, Boone, Brown, Carroll and 34 more | 89 min |
| Feb 11, 2:30 AM CST | Mesoscale Discussion | SPC | Fulton, Hickman | 90 min |
| Feb 11, 5:26 AM CST | Mesoscale Discussion | SPC | Ballard, Carlisle, Fulton, Hickman, McCracken | 64 min |
| Feb 11, 3:34 PM CST | Mesoscale Discussion | SPC | Bell, Boyd, Breathitt, Carter, Clay, Elliott and 19 more | 86 min |
| Feb 11, 4:53 PM CST | Severe Thunderstorm Watch | SPC | Alleghany, Ashe, Stokes, Surry, Watauga, Wilkes and 1 more | 4 hr |
| Feb 10, 11:45 PM CST | Tornado Watch | SPC | Dyer, Lake, Lauderdale, Obion, Shelby, Tipton | 6 hr |
| Feb 11, 4:32 PM CST | Mesoscale Discussion | SPC | Albemarle, Alleghany, Amherst, Appomattox, Augusta, Bath and 57 more | 88 min |
Nearby
Mesoscale Discussions in Kentucky, 2009Mesoscale Discussions in Tennessee, 2009Mesoscale Discussions in Alabama, 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.