Alert archive / West Virginia / Mesoscale Discussions in 2015

Mesoscale Discussion 203

April 3, 20154 states

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2015, 6:10 PM EDT for 4 states. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Apr 3, 2015, 6:10 PM EDT (22:10 UTC)
Expired: Apr 3, 2015, 7:45 PM EDT
In force: 95 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 47 counties

Boyd County, KY, Greenup County, KY, Gallia County, OH, Lawrence County, OH, Alleghany County, VA, Bland County, VA, Carroll County, VA, City of Covington, VA, City of Galax, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, Craig County, VA, Floyd County, VA, Giles County, VA, Montgomery County, VA, Pulaski County, VA, Roanoke County, VA, Smyth County, VA, Tazewell County, VA, Wythe County, VA, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Fayette County, WV, Gilmer County, WV, Greenbrier County, WV, Jackson County, WV, Kanawha County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, McDowell County, WV, Mercer County, WV, Monroe County, WV, Nicholas County, WV, Pocahontas County, WV, Putnam County, WV, Raleigh County, WV, Roane County, WV, Summers County, WV, Wayne County, WV, Webster County, WV, Wirt County, WV, Wyoming County, WV

The radar

The Charleston,WV radar (KRLX), 75 km from the middle of the area, began a volume at 22:09 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

Roanoke, VA (KRNK), launched 12:00Z, 10.2 hours before the alert went out and 179 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 817 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 273 m²/s²
0-3 km storm-relative helicity: 323 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
Apr 2, 8:32 PM EDT	Mesoscale Discussion	SPC	Boone, Breckinridge, Bullitt, Butler, Caldwell, Carroll and 27 more	58 min
Apr 2, 11:41 PM EDT	Severe Thunderstorm Watch	SPC	Ballard, Carlisle, McCracken	6 hr
Apr 3, 4:39 AM EDT	Mesoscale Discussion	SPC	Ballard, Carlisle, Livingston, McCracken	66 min
Apr 3, 12:56 PM EDT	Mesoscale Discussion	SPC	Adair, Allen, Ballard, Barren, Boyle, Breckinridge and 48 more	94 min
Apr 3, 1:14 PM EDT	Tornado Watch	SPC	Allen, Ballard, Barren, Breckinridge, Bullitt, Butler and 39 more	8 hr
Apr 3, 3:23 PM EDT	Mesoscale Discussion	SPC	Adair, Allen, Anderson, Barren, Bath, Bell and 96 more	97 min
Apr 3, 4:10 PM EDT	Tornado Watch	SPC	Adair, Anderson, Bath, Bell, Bourbon, Boyle and 53 more	6 hr

Nearby

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