Alert archive / Iowa / Mesoscale Discussions in 2018
Mesoscale Discussion 342
The Storm Prediction Center issued this mesoscale discussion at May 3, 2018, 5:58 PM CDT for 4 states. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- May 3, 2018, 5:58 PM CDT (22:58 UTC)
- Expired
- May 3, 2018, 7:30 PM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
All 48 counties
Adair County, IA, Adams County, IA, Audubon County, IA, Cass County, IA, Clarke County, IA, Dallas County, IA, Decatur County, IA, Fremont County, IA, Guthrie County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Marion County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Polk County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Warren County, IA, Wayne County, IA, Atchison County, KS, Brown County, KS, Doniphan County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Marshall County, KS, Morris County, KS, Nemaha County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Gentry County, MO, Holt County, MO, Nodaway County, MO, Worth County, MO, Cass County, NE, Johnson County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE
The radar
The Topeka radar (KTWX), 128 km from the middle of the area, began a volume at 23:01 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
Topeka, KS (KFOE), launched 12:00Z, 11.0 hours before the alert went out and 100 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
- 21 J/kg
- Mixed-layer CIN
- -461 J/kg
- Mixed-layer LCL
- 1199 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 308 m²/s²
- 0-3 km storm-relative helicity
- 300 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| May 2, 7:21 PM CDT | Mesoscale Discussion | SPC | Cedar, Clinton, Des Moines, Henry, Iowa, Jackson and 10 more | 84 min |
| May 2, 8:00 PM CDT | Mesoscale Discussion | SPC | Adams, Appanoose, Clarke, Davis, Decatur, Lucas and 11 more | 90 min |
| May 2, 10:01 PM CDT | Mesoscale Discussion | SPC | Des Moines, Henry, Jefferson, Lee, Louisa, Muscatine and 3 more | 89 min |
| May 3, 2:36 PM CDT | Mesoscale Discussion | SPC | Adams, Clarke, Decatur, Fremont, Montgomery, Page and 3 more | 114 min |
| May 3, 2:57 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Cass, Clarke and 24 more | 6 hr |
| May 2, 7:14 PM CDT | Mesoscale Discussion | SPC | Allen, Chautauqua, Cherokee, Crawford, Elk, Labette and 4 more | 2 hr |
| May 2, 11:09 PM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Crawford | 7 hr |
| May 2, 10:20 PM CDT | Mesoscale Discussion | SPC | Audrain, Barry, Barton, Benton, Boone, Callaway and 54 more | 115 min |
| May 2, 11:09 PM CDT | Mesoscale Discussion | SPC | McDonald | 96 min |
| May 3, 2:32 AM CDT | Mesoscale Discussion | SPC | Camden, Carter, Christian, Cole, Crawford, Dallas and 33 more | 88 min |
Nearby
Mesoscale Discussions in Iowa, 2018Mesoscale Discussions in Kansas, 2018Mesoscale Discussions in Missouri, 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.