Alert archive / Iowa / Mesoscale Discussions in 2015
Mesoscale Discussion 1091
The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2015, 6:33 PM CDT for 17 counties in Illinois; 32 counties in Iowa; 14 counties in Missouri. It was in force for 57 min.
The area
The outline as issued.
The facts
- Issued
- Jun 20, 2015, 6:33 PM CDT (23:33 UTC)
- Expired
- Jun 20, 2015, 7:30 PM CDT
- In force
- 57 min
- Issued by
- the Storm Prediction Center
All 63 counties
Appanoose County, IA, Boone County, IA, Clarke County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Des Moines County, IA, Greene County, IA, Henry County, IA, Iowa County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Muscatine County, IA, Polk County, IA, Poweshiek County, IA, Ringgold County, IA, Story County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Adams County, IL, Brown County, IL, Cass County, IL, Fulton County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Knox County, IL, Mason County, IL, McDonough County, IL, Mercer County, IL, Morgan County, IL, Pike County, IL, Rock Island County, IL, Schuyler County, IL, Scott County, IL, Warren County, IL, Adair County, MO, Clark County, MO, Grundy County, MO, Harrison County, MO, Knox County, MO, Lewis County, MO, Marion County, MO, Mercer County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO, Worth County, MO
The radar
The Des Moines radar (KDMX), 114 km from the middle of the area, began a volume at 23:36 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 12:00Z, 11.6 hours before the alert went out and 186 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 769 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 77 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 |
|---|---|---|---|---|
| Jun 20, 12:48 PM CDT | Mesoscale Discussion | SPC | Henderson, Henry, Knox, Mercer, Rock Island, Stark and 2 more | 117 min |
| Jun 20, 3:10 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Cass, Fulton, Hancock, Henderson and 6 more | 2 hr |
| Jun 20, 3:49 PM CDT | Tornado Watch | SPC | Adams, Brown, Cass, Christian, DeWitt, Fulton and 26 more | 7 hr |
| Jun 20, 2:52 AM CDT | Mesoscale Discussion | SPC | Dickinson, Emmet, Lyon, Osceola | 53 min |
| Jun 20, 3:18 AM CDT | Severe Thunderstorm Watch | SPC | Clay, Dickinson, Emmet, Kossuth, Lyon, O'Brien and 3 more | 3 hr |
| Jun 20, 5:11 AM CDT | Mesoscale Discussion | SPC | Cerro Gordo, Clay, Emmet, Floyd, Hancock, Humboldt and 5 more | 64 min |
Nearby
Mesoscale Discussions in Iowa, 2015Mesoscale Discussions in Illinois, 2015Mesoscale Discussions in Missouri, 2015Every mesoscale discussion in 2015
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.