Alert archive / Kentucky / Mesoscale Discussions in 2015
Mesoscale Discussion 460
The Storm Prediction Center issued this mesoscale discussion at Apr 25, 2015, 6:14 PM CDT for 35 counties in Kentucky; Clay County, Macon County, Pickett County, Tennessee. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Apr 25, 2015, 6:14 PM CDT (23:14 UTC)
- Expired
- Apr 25, 2015, 7:45 PM CDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
All 38 counties
Adair County, KY, Allen County, KY, Barren County, KY, Boyle County, KY, Butler County, KY, Casey County, KY, Christian County, KY, Clay County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Garrard County, KY, Grayson County, KY, Green County, KY, Hardin County, KY, Hart County, KY, Jackson County, KY, Larue County, KY, Laurel County, KY, Lincoln County, KY, Logan County, KY, Marion County, KY, McCreary County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Simpson County, KY, Taylor County, KY, Todd County, KY, Warren County, KY, Wayne County, KY, Whitley County, KY, Clay County, TN, Macon County, TN, Pickett County, TN
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, 11.2 hours before the alert went out and 132 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
- 582 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- 377 m²/s²
- 0-3 km storm-relative helicity
- 417 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 |
|---|---|---|---|---|
| Apr 25, 12:22 PM CDT | Mesoscale Discussion | SPC | Allen, Ballard, Barren, Breckinridge, Bullitt, Butler and 31 more | 2 hr |
| Apr 25, 12:55 PM CDT | Tornado Watch | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more | 7 hr |
| Apr 25, 3:25 PM CDT | Mesoscale Discussion | SPC | Ballard, Caldwell, Carlisle, Christian, Crittenden, Daviess and 12 more | 2 hr |
| Apr 25, 4:57 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Barren, Bell, Boyle, Breckinridge and 40 more | 6 hr |
Nearby
Mesoscale Discussions in Kentucky, 2015Mesoscale Discussions in Tennessee, 2015Every mesoscale discussion in 2015
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.