Alert archive / Michigan / Mesoscale Discussions in 2003
Mesoscale Discussion 2215
The Storm Prediction Center issued this mesoscale discussion at Aug 21, 2003, 6:20 PM EDT for 37 counties in Michigan. It was in force for 55 min.
The area
The outline as issued.
The facts
- Issued
- Aug 21, 2003, 6:20 PM EDT (22:20 UTC)
- Expired
- Aug 21, 2003, 7:15 PM EDT
- In force
- 55 min
- Issued by
- the Storm Prediction Center
All 37 counties
Alcona County, MI, Alpena County, MI, Antrim County, MI, Arenac County, MI, Bay County, MI, Benzie County, MI, Charlevoix County, MI, Cheboygan County, MI, Chippewa County, MI, Clare County, MI, Crawford County, MI, Emmet County, MI, Gladwin County, MI, Grand Traverse County, MI, Iosco County, MI, Isabella County, MI, Kalkaska County, MI, Lake County, MI, Leelanau County, MI, Luce County, MI, Mackinac County, MI, Manistee County, MI, Mason County, MI, Mecosta County, MI, Midland County, MI, Missaukee County, MI, Montmorency County, MI, Newaygo County, MI, Oceana County, MI, Ogemaw County, MI, Osceola County, MI, Oscoda County, MI, Otsego County, MI, Presque Isle County, MI, Roscommon County, MI, Schoolcraft County, MI, Wexford County, MI
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 10.3 hours before the alert went out and 255 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
- 1787 J/kg
- Mixed-layer CIN
- -178 J/kg
- Mixed-layer LCL
- 1082 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 297 m²/s²
- 0-3 km storm-relative helicity
- 304 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
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 20, 8:22 PM EDT | Mesoscale Discussion | SPC | Gogebic, Iron, Ontonagon | 113 min |
| Aug 21, 5:29 AM EDT | Mesoscale Discussion | SPC | Antrim, Arenac, Barry, Bay, Calhoun, Cheboygan and 26 more | 3 hr |
| Aug 21, 1:07 PM EDT | Mesoscale Discussion | SPC | Alger, Antrim, Benzie, Charlevoix, Cheboygan, Chippewa and 34 more | 113 min |
| Aug 21, 1:30 PM EDT | Tornado Watch | SPC | Alcona, Alpena, Antrim, Arenac, Bay, Benzie and 31 more | 6 hr |
| Aug 21, 3:49 PM EDT | Mesoscale Discussion | SPC | Alcona, Alpena, Antrim, Arenac, Bay, Benzie and 31 more | 86 min |
Nearby
Mesoscale Discussions in Michigan, 2003Every mesoscale discussion in 2003
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.