Alert archive / Virginia / Mesoscale Discussions in 2011
Mesoscale Discussion 1160
The Storm Prediction Center issued this mesoscale discussion at Jun 9, 2011, 6:17 PM EDT for 4 states. It was in force for 58 min.
The area
The outline as issued.
The facts
- Issued
- Jun 9, 2011, 6:17 PM EDT (22:17 UTC)
- Expired
- Jun 9, 2011, 7:15 PM EDT
- In force
- 58 min
- Issued by
- the Storm Prediction Center
All 90 counties
Allegany County, MD, Baltimore County, MD, Carroll County, MD, City of Baltimore, MD, Frederick County, MD, Garrett County, MD, Howard County, MD, Montgomery County, MD, Prince George's County, MD, Washington County, MD, Adams County, PA, Bedford County, PA, Blair County, PA, Cambria County, PA, Cumberland County, PA, Fayette County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Mifflin County, PA, Perry County, PA, Somerset County, PA, York County, PA, Alleghany County, VA, Arlington County, VA, Augusta County, VA, Bath County, VA, City of Alexandria, VA, City of Covington, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Harrisonburg, VA, City of Manassas, VA, City of Manassas Park, VA, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Clarke County, VA, Culpeper County, VA, Fairfax County, VA, Fauquier County, VA, Frederick County, VA, Greene County, VA, Highland County, VA, Loudoun County, VA, Madison County, VA, Orange County, VA, Page County, VA, Prince William County, VA, Rappahannock County, VA, Rockbridge County, VA, Rockingham County, VA, Shenandoah County, VA, Stafford County, VA, Warren County, VA, Barbour County, WV, Berkeley County, WV, Boone County, WV, Braxton County, WV, Calhoun County, WV, Clay County, WV, Fayette County, WV, Gilmer County, WV, Grant County, WV, Greenbrier County, WV, Hampshire County, WV, Hardy County, WV, Harrison County, WV, Jefferson County, WV, Kanawha County, WV, Lewis County, WV, Marion County, WV, Mineral County, WV, Monongalia County, WV, Morgan County, WV, Nicholas County, WV, Pendleton County, WV, Pocahontas County, WV, Preston County, WV, Raleigh County, WV, Randolph County, WV, Roane County, WV, Summers County, WV, Taylor County, WV, Tucker County, WV, Upshur County, WV, Webster County, WV, Wyoming County, WV
The radar
The Sterling radar (KLWX), 127 km from the middle of the area, began a volume at 22:21 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, 10.3 hours before the alert went out and 189 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
- 2633 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 1084 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.6
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 9, 12:53 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Baltimore, Carroll, Frederick, Garrett, Harford and 4 more | 7 hr |
| Jun 9, 1:45 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 12 more | 90 min |
| Jun 9, 2:34 PM EDT | Severe Thunderstorm Watch | SPC | Cecil | 7 hr |
| Jun 9, 7:17 PM EDT | Mesoscale Discussion | SPC | Cecil | 58 min |
| Jun 9, 3:29 AM EDT | Mesoscale Discussion | SPC | Cameron, Crawford, Elk, Erie, Forest, McKean and 5 more | 2 hr |
| Jun 9, 3:56 AM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Butler, Cameron, Clarion and 13 more | 6 hr |
| Jun 9, 8:13 AM EDT | Mesoscale Discussion | SPC | Clarion, Crawford, Elk, Erie, Forest, Lawrence and 6 more | 2 hr |
| Jun 9, 10:36 AM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Blair, Bradford, Butler and 31 more | 84 min |
| Jun 9, 11:33 AM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Bedford, Blair, Bradford, Butler and 37 more | 57 min |
| Jun 9, 12:06 PM EDT | Severe Thunderstorm Watch | SPC | Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more | 8 hr |
| Jun 9, 3:18 PM EDT | Mesoscale Discussion | SPC | Bradford, Carbon, Columbia, Lackawanna, Luzerne, Monroe and 7 more | 87 min |
| Jun 9, 1:10 PM EDT | Mesoscale Discussion | SPC | Bland, Buchanan, Carroll, Dickenson, Floyd, Franklin and 19 more | 95 min |
Nearby
Mesoscale Discussions in Virginia, 2011Mesoscale Discussions in West Virginia, 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.