Alert archive / Michigan / Mesoscale Discussions in 2004
Mesoscale Discussion 1834
The Storm Prediction Center issued this mesoscale discussion at Aug 2, 2004, 12:31 PM EST for DeKalb County, LaGrange County, Steuben County, Indiana; 50 counties in Michigan. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- Aug 2, 2004, 12:31 PM EST (17:31 UTC)
- Expired
- Aug 2, 2004, 2:30 PM EST
- In force
- 119 min
- Issued by
- the Storm Prediction Center
All 53 counties
DeKalb County, IN, LaGrange County, IN, Steuben County, IN, Allegan County, MI, Antrim County, MI, Arenac County, MI, Barry County, MI, Bay County, MI, Benzie County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Clare County, MI, Clinton County, MI, Crawford County, MI, Eaton County, MI, Genesee County, MI, Gladwin County, MI, Grand Traverse County, MI, Gratiot County, MI, Hillsdale County, MI, Ingham County, MI, Ionia County, MI, Iosco County, MI, Isabella County, MI, Jackson County, MI, Kalamazoo County, MI, Kalkaska County, MI, Kent County, MI, Lake County, MI, Livingston County, MI, Manistee County, MI, Mason County, MI, Mecosta County, MI, Midland County, MI, Missaukee County, MI, Montcalm County, MI, Montmorency County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Ogemaw County, MI, Osceola County, MI, Oscoda County, MI, Otsego County, MI, Ottawa County, MI, Roscommon County, MI, Saginaw County, MI, Saint Joseph County, MI, Shiawassee County, MI, Tuscola County, MI, Van Buren County, MI, Wexford County, MI
The radar
The Grand Rapids radar (KGRR), 4 km from the middle of the area, began a volume at 17:30 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
Detroit, MI (KDTX), launched 12:00Z, 5.5 hours before the alert went out and 170 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
- 674 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 1053 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 2, 11:11 AM EST | Mesoscale Discussion | SPC | Benton, Carroll, Fountain, Jasper, Lake, LaPorte and 10 more | 2 hr |
| Aug 2, 11:44 AM EST | Mesoscale Discussion | SPC | Alger, Delta, Dickinson, Iron, Luce, Mackinac and 2 more | 2 hr |
| Aug 2, 1:05 PM EST | Severe Thunderstorm Watch | SPC | Allegan, Antrim, Barry, Bay, Benzie, Calhoun and 41 more | 5 hr |
| Aug 2, 4:32 PM EST | Mesoscale Discussion | SPC | Alcona, Alpena, Arenac, Barry, Bay, Calhoun and 34 more | 88 min |
Nearby
Mesoscale Discussions in Michigan, 2004Mesoscale Discussions in Indiana, 2004Every mesoscale discussion in 2004
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.