Alert archive / West Virginia / Mesoscale Discussions in 2011
Mesoscale Discussion 1891
The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2011, 7:36 PM EDT for 4 counties in Ohio; Greene County, Pennsylvania; 21 counties in West Virginia. It was in force for 84 min.
The area
The outline as issued.
The facts
- Issued
- Aug 7, 2011, 7:36 PM EDT (23:36 UTC)
- Expired
- Aug 7, 2011, 9:00 PM EDT
- In force
- 84 min
- Issued by
- the Storm Prediction Center
All 26 counties
Gallia County, OH, Jackson County, OH, Meigs County, OH, Washington County, OH, Greene County, PA, Barbour County, WV, Braxton County, WV, Calhoun County, WV, Doddridge County, WV, Gilmer County, WV, Harrison County, WV, Jackson County, WV, Lewis County, WV, Marion County, WV, Mason County, WV, Monongalia County, WV, Pleasants County, WV, Preston County, WV, Ritchie County, WV, Roane County, WV, Taylor County, WV, Tyler County, WV, Upshur County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV
The radar
The Charleston,WV radar (KRLX), 120 km from the middle of the area, began a volume at 23:38 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
Pittsburgh, PA (KPIT), launched 12:00Z, 11.6 hours before the alert went out and 153 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
- 1146 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 541 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.7
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 |
|---|---|---|---|---|
| Aug 7, 12:14 PM EDT | Mesoscale Discussion | SPC | Allen, Auglaize, Butler, Champaign, Clark, Darke and 15 more | 2 hr |
| Aug 7, 1:11 PM EDT | Severe Thunderstorm Watch | SPC | Auglaize, Butler, Champaign, Clark, Clinton, Darke and 20 more | 6 hr |
| Aug 7, 4:01 PM EDT | Mesoscale Discussion | SPC | Athens, Belmont, Butler, Champaign, Clark, Clinton and 30 more | 119 min |
| Aug 7, 5:49 PM EDT | Severe Thunderstorm Watch | SPC | Ashland, Athens, Belmont, Carroll, Coshocton, Guernsey and 16 more | 4 hr |
| Aug 7, 3:53 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Blair, Bradford, Carbon, Centre and 25 more | 67 min |
Nearby
Mesoscale Discussions in West Virginia, 2011Mesoscale Discussions in Ohio, 2011Mesoscale Discussions in Pennsylvania, 2011Every mesoscale discussion in 2011
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.