Alert archive / West Virginia / Mesoscale Discussions in 2015

Mesoscale Discussion 938

June 8, 20154 states

The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2015, 1:10 PM EDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 8, 2015, 1:10 PM EDT (17:10 UTC)
Expired: Jun 8, 2015, 3:15 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 60%

All 56 counties

Breathitt County, KY, Clay County, KY, Floyd County, KY, Harlan County, KY, Knott County, KY, Knox County, KY, Leslie County, KY, Letcher County, KY, Martin County, KY, Perry County, KY, Pike County, KY, Allegany County, MD, Garrett County, MD, Buchanan County, VA, City of Norton, VA, Dickenson County, VA, Russell County, VA, Scott County, VA, Tazewell County, VA, Wise County, VA, Barbour County, WV, Boone County, WV, Braxton County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Fayette County, WV, Gilmer County, WV, Grant County, WV, Greenbrier County, WV, Harrison County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Logan County, WV, Marion County, WV, McDowell County, WV, Mercer County, WV, Mineral County, WV, Mingo County, WV, Monongalia County, WV, Nicholas County, WV, Pendleton County, WV, Pocahontas County, WV, Preston County, WV, Raleigh County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Summers County, WV, Taylor County, WV, Tucker County, WV, Upshur County, WV, Webster County, WV, Wetzel County, WV, Wyoming County, WV

The radar

The Charleston,WV radar (KRLX), 29 km from the middle of the area, began a volume at 17:14 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

Roanoke, VA (KRNK), launched 12:00Z, 5.2 hours before the alert went out and 203 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 88 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 885 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 144 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

Issued	Product	Office	Counties	Lasted
Jun 8, 1:08 PM EDT	Mesoscale Discussion	SPC	Adair, Allen, Ballard, Barren, Bell, Butler and 26 more	97 min
Jun 8, 1:57 PM EDT	Severe Thunderstorm Watch	SPC	Adair, Allen, Ballard, Barren, Breckinridge, Butler and 37 more	8 hr
Jun 8, 2:40 PM EDT	Severe Thunderstorm Watch	SPC	Bell, Harlan, Knox, Letcher, McCreary, Pike and 2 more	6 hr
Jun 8, 4:24 PM EDT	Mesoscale Discussion	SPC	Adair, Allen, Barren, Bath, Bell, Bourbon and 56 more	96 min
Jun 8, 1:31 PM EDT	Mesoscale Discussion	SPC	Washington	119 min
Jun 8, 2:34 PM EDT	Tornado Watch	SPC	Allegany, Anne Arundel, Baltimore, Carroll, Charles, Frederick and 6 more	5 hr
Jun 8, 4:46 PM EDT	Mesoscale Discussion	SPC	Baltimore, Carroll, Frederick, Harford, Howard, Montgomery and 3 more	59 min
Jun 8, 7:07 PM EDT	Mesoscale Discussion	SPC	Anne Arundel, Baltimore, Carroll, Charles, Frederick, Harford and 4 more	53 min
Jun 8, 7:24 PM EDT	Severe Thunderstorm Watch	SPC	Anne Arundel, Baltimore, Carroll, Charles, Harford, Howard and 3 more	2 hr
Jun 8, 6:24 PM EDT	Mesoscale Discussion	SPC	Amherst, Appomattox, Bedford, Bland, Buckingham, Campbell and 27 more	96 min

Nearby

Mesoscale Discussions in West Virginia, 2015 Mesoscale Discussions in Kentucky, 2015 Mesoscale Discussions in Virginia, 2015 Every 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.