Alert archive / Wisconsin / Mesoscale Discussions in 2017
Mesoscale Discussion 1290
The Storm Prediction Center issued this mesoscale discussion at Jul 11, 2017, 9:49 PM CDT for 8 counties in Illinois; 4 counties in Iowa; 11 counties in Wisconsin. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- Jul 11, 2017, 9:49 PM CDT (02:49 UTC)
- Expired
- Jul 11, 2017, 11:45 PM CDT
- In force
- 116 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 23 counties
Allamakee County, IA, Clayton County, IA, Dubuque County, IA, Winneshiek County, IA, Boone County, IL, DeKalb County, IL, Jo Daviess County, IL, Kane County, IL, McHenry County, IL, Ogle County, IL, Stephenson County, IL, Winnebago County, IL, Crawford County, WI, Dane County, WI, Grant County, WI, Green County, WI, Iowa County, WI, Lafayette County, WI, Richland County, WI, Rock County, WI, Sauk County, WI, Vernon County, WI, Walworth County, WI
The radar
The Milwaukee radar (KMKX), 119 km from the middle of the area, began a volume at 02:53 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
Davenport, (KDVN), launched 00:00Z, 2.8 hours before the alert went out and 119 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
- 1096 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 755 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 268 m²/s²
- 0-3 km storm-relative helicity
- 315 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 7.6
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 |
|---|---|---|---|---|
| Jul 12, 8:33 AM CDT | Mesoscale Discussion | SPC | Cook, DuPage | 117 min |
| Jul 12, 3:33 PM CDT | Mesoscale Discussion | SPC | Allamakee, Benton, Black Hawk, Bremer, Buchanan, Clayton and 11 more | 87 min |
| Jul 12, 6:19 PM CDT | Mesoscale Discussion | SPC | Clayton | 86 min |
| Jul 11, 10:00 PM CDT | Severe Thunderstorm Watch | SPC | Barron, Chippewa, Dunn, Eau Claire, Polk, Rusk and 1 more | 6 hr |
| Jul 12, 1:49 AM CDT | Mesoscale Discussion | SPC | Adams, Barron, Buffalo, Burnett, Chippewa, Clark and 23 more | 2 hr |
| Jul 12, 3:56 AM CDT | Mesoscale Discussion | SPC | Chippewa, Clark, Eau Claire, Jackson, Langlade, Lincoln and 6 more | 3 hr |
| Jul 12, 2:53 PM CDT | Mesoscale Discussion | SPC | Adams, Clark, Eau Claire, Forest, Jackson, Juneau and 16 more | 97 min |
| Jul 12, 3:33 PM CDT | Severe Thunderstorm Watch | SPC | Brown, Calumet, Clark, Florence, Forest, Jackson and 18 more | 7 hr |
Nearby
Mesoscale Discussions in Wisconsin, 2017Mesoscale Discussions in Illinois, 2017Mesoscale Discussions in Iowa, 2017Every mesoscale discussion in 2017
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.