Alert archive / Michigan / Mesoscale Discussions in 2018
Mesoscale Discussion 1376
The Storm Prediction Center issued this mesoscale discussion at Aug 27, 2018, 11:34 PM EDT for 18 counties in Michigan; 14 counties in Wisconsin. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- Aug 27, 2018, 11:34 PM EDT (03:34 UTC)
- Expired
- Aug 28, 2018, 1:30 AM EDT
- In force
- 116 min
- Issued by
- the Storm Prediction Center
All 32 counties
Antrim County, MI, Benzie County, MI, Charlevoix County, MI, Cheboygan County, MI, Crawford County, MI, Emmet County, MI, Grand Traverse County, MI, Kalkaska County, MI, Lake County, MI, Leelanau County, MI, Manistee County, MI, Mason County, MI, Missaukee County, MI, Montmorency County, MI, Oscoda County, MI, Otsego County, MI, Roscommon County, MI, Wexford County, MI, Brown County, WI, Calumet County, WI, Columbia County, WI, Door County, WI, Fond du Lac County, WI, Green Lake County, WI, Kewaunee County, WI, Manitowoc County, WI, Marquette County, WI, Outagamie County, WI, Richland County, WI, Sauk County, WI, Sheboygan County, WI, Winnebago County, WI
The radar
The Green Bay radar (KGRB), 54 km from the middle of the area, began a volume at 03:34 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
Green Bay/Straub, WI (KGRB), launched 00:00Z, 3.6 hours before the alert went out and 53 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
- 1227 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 1085 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 198 m²/s²
- 0-3 km storm-relative helicity
- 370 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 13.5
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 |
|---|---|---|---|---|
| Aug 28, 4:24 PM EDT | Mesoscale Discussion | SPC | Benzie, Lake, Manistee, Mason, Mecosta, Missaukee and 7 more | 96 min |
| Aug 28, 6:23 PM EDT | Severe Thunderstorm Watch | SPC | Alcona, Allegan, Alpena, Antrim, Arenac, Barry and 43 more | 7 hr |
| Aug 28, 1:14 PM EDT | Mesoscale Discussion | SPC | Adams, Calumet, Columbia, Crawford, Dane, Dodge and 18 more | 2 hr |
| Aug 28, 2:14 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Calumet, Columbia, Crawford, Dane and 31 more | 8 hr |
Nearby
Mesoscale Discussions in Michigan, 2018Mesoscale Discussions in Wisconsin, 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.