Alert archive / North Carolina / Mesoscale Discussions in 2011
Mesoscale Discussion 1538
The Storm Prediction Center issued this mesoscale discussion at Jul 8, 2011, 1:01 PM EDT for 69 counties in North Carolina; 26 counties in South Carolina; 18 counties in Virginia. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Jul 8, 2011, 1:01 PM EDT (17:01 UTC)
- Expired
- Jul 8, 2011, 2:30 PM EDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
All 113 counties
Alamance County, NC, Alexander County, NC, Anson County, NC, Beaufort County, NC, Bertie County, NC, Bladen County, NC, Cabarrus County, NC, Camden County, NC, Caswell County, NC, Catawba County, NC, Chatham County, NC, Chowan County, NC, Cleveland County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Davidson County, NC, Davie County, NC, Duplin County, NC, Durham County, NC, Edgecombe County, NC, Forsyth County, NC, Franklin County, NC, Gaston County, NC, Gates County, NC, Granville County, NC, Greene County, NC, Guilford County, NC, Halifax County, NC, Harnett County, NC, Hertford County, NC, Hoke County, NC, Iredell County, NC, Johnston County, NC, Jones County, NC, Lee County, NC, Lenoir County, NC, Lincoln County, NC, Martin County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Northampton County, NC, Orange County, NC, Pasquotank County, NC, Perquimans County, NC, Person County, NC, Pitt County, NC, Polk County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Rockingham County, NC, Rowan County, NC, Rutherford County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Stokes County, NC, Surry County, NC, Union County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Yadkin County, NC, Calhoun County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Fairfield County, SC, Florence County, SC, Greenville County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Marlboro County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Spartanburg County, SC, Sumter County, SC, Union County, SC, Williamsburg County, SC, York County, SC, Bedford County, VA, City of Danville, VA, City of Emporia, VA, City of Franklin, VA, City of Martinsville, VA, City of Roanoke, VA, City of Salem, VA, City of Suffolk, VA, Floyd County, VA, Franklin County, VA, Greensville County, VA, Halifax County, VA, Henry County, VA, Mecklenburg County, VA, Patrick County, VA, Pittsylvania County, VA, Roanoke County, VA, Southampton County, VA
The radar
The Raleigh/Durham radar (KRAX), 121 km from the middle of the area, began a volume at 17:01 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
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 5.0 hours before the alert went out and 70 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
- 1246 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 557 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.9
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 |
|---|---|---|---|---|
| Jul 8, 2:00 PM EDT | Mesoscale Discussion | SPC | Abbeville, Edgefield, Greenwood, McCormick | 90 min |
| Jul 8, 11:44 AM EDT | Mesoscale Discussion | SPC | Albemarle, Arlington, Augusta, Caroline, Clarke, Culpeper and 30 more | 61 min |
| Jul 8, 1:51 PM EDT | Severe Thunderstorm Watch | SPC | Albemarle, Arlington, Culpeper, Fairfax, Fauquier, Greene and 16 more | 7 hr |
| Jul 8, 5:52 PM EDT | Mesoscale Discussion | SPC | Arlington, Culpeper, Fairfax, Fauquier, Loudoun, Madison and 7 more | 83 min |
Nearby
Mesoscale Discussions in North Carolina, 2011Mesoscale Discussions in South Carolina, 2011Mesoscale Discussions in Virginia, 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.