Alert archive / North Carolina / Mesoscale Discussions in 2018
Mesoscale Discussion 1450
The Storm Prediction Center issued this mesoscale discussion at Sep 14, 2018, 3:42 PM EDT for 16 counties in North Carolina. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 14, 2018, 3:42 PM EDT (19:42 UTC)
- Expired
- Sep 14, 2018, 5:45 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
Counties Beaufort County, NC, Carteret County, NC, Craven County, NC, Duplin County, NC, Edgecombe County, NC, Greene County, NC, Hyde County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, Onslow County, NC, Pamlico County, NC, Pitt County, NC, Sampson County, NC, Wayne County, NC, Wilson County, NC
The radar
The Morehead City radar (KMHX), 38 km from the middle of the area, began a volume at 19:46 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
Newport, NC (KMHX), launched 12:00Z, 7.7 hours before the alert went out and 37 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
- 370 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 567 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 238 m²/s²
- 0-3 km storm-relative helicity
- 203 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.6
The text
As transmitted.
<!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 |
|---|---|---|---|---|
| Sep 13, 8:25 PM EDT | Mesoscale Discussion | SPC | Beaufort, Carteret, Craven, Hyde, Jones, Onslow and 1 more | 2 hr |
| Sep 13, 8:59 PM EDT | Tornado Watch | SPC | Beaufort, Carteret, Craven, Dare, Duplin, Greene and 9 more | 10 hr |
| Sep 14, 12:56 AM EDT | Mesoscale Discussion | SPC | Beaufort, Carteret, Craven, Dare, Duplin, Greene and 9 more | 3 hr |
| Sep 14, 6:02 AM EDT | Mesoscale Discussion | SPC | Beaufort, Carteret, Craven, Dare, Duplin, Hyde and 9 more | 88 min |
| Sep 14, 6:58 AM EDT | Tornado Watch | SPC | Beaufort, Bertie, Carteret, Chowan, Craven, Dare and 20 more | 10 hr |
| Sep 14, 11:26 AM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 19 more | 2 hr |
| Sep 14, 4:48 PM EDT | Tornado Watch | SPC | Beaufort, Carteret, Craven, Cumberland, Duplin, Edgecombe and 13 more | 6 hr |
| Sep 14, 7:09 PM EDT | Mesoscale Discussion | SPC | Alamance, Caswell, Durham, Granville, Halifax, Northampton and 4 more | 2 hr |
Nearby
Mesoscale Discussions in North Carolina, 2018Every mesoscale discussion in 2018
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.