Alert archive / Kentucky / Mesoscale Discussions in 2015

Mesoscale Discussion 1345

July 9, 201515 counties in Kentucky; 8 counties in Virginia; McDowell County, West Virginia

The Storm Prediction Center issued this mesoscale discussion at Jul 9, 2015, 5:58 PM EDT for 15 counties in Kentucky; 8 counties in Virginia; McDowell County, West Virginia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 9, 2015, 5:58 PM EDT (21:58 UTC)
Expired
Jul 9, 2015, 8:00 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 24 counties

Breathitt County, KY, Clay County, KY, Floyd County, KY, Harlan County, KY, Jackson County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Leslie County, KY, Letcher County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Pulaski County, KY, Rockcastle County, KY, Bland County, VA, Buchanan County, VA, City of Norton, VA, Dickenson County, VA, Russell County, VA, Smyth County, VA, Tazewell County, VA, Wise County, VA, McDowell County, WV

The radar

The Jackson,KY radar (KJKL), 55 km from the middle of the area, began a volume at 22:00 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 nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 10.0 hours before the alert went out and 263 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.

Skew-T log-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2015-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 318 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2015-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 197 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
318 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
635 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
197 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.3

Open this sounding in Storm Lab

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.

IssuedProductOfficeCountiesLasted
Jul 8, 10:01 PM EDTMesoscale DiscussionSPCBallard, Crittenden, Daviess, Henderson, Union, Webster89 min
Jul 9, 12:40 AM EDTMesoscale DiscussionSPCBreckinridge, Butler, Caldwell, Calloway, Christian, Crittenden and 19 more65 min
Jul 9, 5:11 AM EDTMesoscale DiscussionSPCAdair, Barren, Boyle, Butler, Casey, Christian and 19 more3 hr
Jul 9, 12:15 PM EDTMesoscale DiscussionSPCAdair, Allen, Barren, Bell, Boyle, Breathitt and 37 more3 hr
Jul 9, 7:10 PM EDTMesoscale DiscussionSPCBallard, Caldwell, Carlisle, Crittenden, Graves, Hickman and 8 more2 hr
Jul 9, 12:59 PM EDTMesoscale DiscussionSPCClarke, Frederick, Loudoun, City of Winchester2 hr
Jul 9, 1:27 PM EDTTornado WatchSPCFrederick, City of Winchester6 hr
Jul 9, 3:09 PM EDTMesoscale DiscussionSPCArlington, Clarke, Frederick, Loudoun, City of Falls Church, City of Winchester96 min
Jul 9, 4:55 PM EDTMesoscale DiscussionSPCFrederick, City of Winchester95 min
Jul 9, 7:04 PM EDTMesoscale DiscussionSPCCaroline, Essex, Hanover, King and Queen, King George, King William and 7 more86 min
Jul 9, 11:27 AM EDTMesoscale DiscussionSPCBarbour, Braxton, Brooke, Calhoun, Clay, Doddridge and 25 more2 hr

Nearby

Mesoscale Discussions in Kentucky, 2015Mesoscale Discussions in Virginia, 2015Mesoscale Discussions in West Virginia, 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; radar from the NEXRAD Level II archive.