Alert archive / North Carolina / Mesoscale Discussions in 2008
Mesoscale Discussion 644
The Storm Prediction Center issued this mesoscale discussion at Apr 12, 2008, 9:48 AM EDT for 42 counties in North Carolina; 17 counties in South Carolina; 16 counties in Virginia. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- Apr 12, 2008, 9:48 AM EDT (13:48 UTC)
- Expired
- Apr 12, 2008, 11:45 AM EDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
All 75 counties
Alamance County, NC, Anson County, NC, Cabarrus County, NC, Caswell County, NC, Catawba County, NC, Chatham County, NC, Cleveland County, NC, Cumberland County, NC, Davidson County, NC, Davie County, NC, Durham County, NC, Edgecombe County, NC, Forsyth County, NC, Franklin County, NC, Gaston County, NC, Granville County, NC, Guilford County, NC, Halifax County, NC, Harnett County, NC, Hoke County, NC, Iredell County, NC, Johnston County, NC, Lee County, NC, Lincoln County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Northampton County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Richmond County, NC, Rowan County, NC, Rutherford County, NC, Scotland County, NC, Stanly County, NC, Union County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Wilson County, NC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Fairfield County, SC, Greenville County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lexington County, SC, Marlboro County, SC, Newberry County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Union County, SC, York County, SC, Brunswick County, VA, Charles City County, VA, City of Emporia, VA, City of Franklin, VA, City of Hopewell, VA, City of Petersburg, VA, City of Williamsburg, VA, Dinwiddie County, VA, Gloucester County, VA, Greensville County, VA, James City County, VA, Mecklenburg County, VA, Prince George County, VA, Southampton County, VA, Surry County, VA, Sussex County, VA
The radar
The Columbia radar (KCAE), 165 km from the middle of the area, began a volume at 13:51 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
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 1.8 hours before the alert went out and 97 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
- 201 J/kg
- Mixed-layer CIN
- -131 J/kg
- Mixed-layer LCL
- 667 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 165 m²/s²
- 0-3 km storm-relative helicity
- 189 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.2
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 12, 1:48 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Camden, Chowan, Columbus and 29 more | 57 min |
| Apr 12, 2:12 PM EDT | Severe Thunderstorm Watch | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 38 more | 4 hr |
| Apr 12, 3:39 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Chowan and 28 more | 2 hr |
| Apr 12, 11:59 AM EDT | Severe Thunderstorm Watch | SPC | Accomack, Brunswick, Charles City, Dinwiddie, Essex, Gloucester and 34 more | 6 hr |
Nearby
Mesoscale Discussions in North Carolina, 2008Mesoscale Discussions in South Carolina, 2008Mesoscale Discussions in Virginia, 2008Every mesoscale discussion in 2008
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.