Alert archive / Illinois / Mesoscale Discussions in 2004
Mesoscale Discussion 632
The Storm Prediction Center issued this mesoscale discussion at May 10, 2004, 11:05 AM CDT for 25 counties in Illinois; 8 counties in Iowa; 5 counties in Wisconsin. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- May 10, 2004, 11:05 AM CDT (16:05 UTC)
- Expired
- May 10, 2004, 1:00 PM CDT
- In force
- 115 min
- Issued by
- the Storm Prediction Center
All 38 counties
Cedar County, IA, Clinton County, IA, Dubuque County, IA, Jackson County, IA, Jones County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Boone County, IL, Bureau County, IL, Carroll County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Grundy County, IL, Henry County, IL, Jo Daviess County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, McHenry County, IL, Mercer County, IL, Ogle County, IL, Putnam County, IL, Rock Island County, IL, Stark County, IL, Stephenson County, IL, Whiteside County, IL, Will County, IL, Winnebago County, IL, Green County, WI, Kenosha County, WI, Lafayette County, WI, Rock County, WI, Walworth County, WI
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 4.1 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
- 212 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 1187 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 108 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 |
|---|---|---|---|---|
| May 9, 9:04 PM CDT | Mesoscale Discussion | SPC | Kankakee | 56 min |
| May 10, 6:05 PM CDT | Mesoscale Discussion | SPC | Cook, DeWitt, DuPage, Ford, Grundy, Iroquois and 5 more | 115 min |
| May 9, 7:55 PM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Dickinson, Lyon, O'Brien, Osceola, Plymouth and 2 more | 4 hr |
| May 9, 8:09 PM CDT | Mesoscale Discussion | SPC | Dickinson, Emmet, Howard, Lyon, Mitchell, Osceola and 2 more | 2 hr |
| May 9, 7:20 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Buffalo, Chippewa, Clark, Dunn and 26 more | 7 hr |
| May 9, 10:21 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calumet, Columbia, Fond du Lac, Green Lake and 13 more | 114 min |
Nearby
Mesoscale Discussions in Illinois, 2004Mesoscale Discussions in Iowa, 2004Mesoscale Discussions in Wisconsin, 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.