Alert archive / Missouri / Mesoscale Discussions in 2011
Mesoscale Discussion 378
The Storm Prediction Center issued this mesoscale discussion at Apr 8, 2011, 11:26 PM CDT for 13 counties in Kansas; 50 counties in Missouri. It was in force for 94 min.
The area
The outline as issued.
The facts
- Issued
- Apr 8, 2011, 11:26 PM CDT (04:26 UTC)
- Expired
- Apr 9, 2011, 1:00 AM CDT
- In force
- 94 min
- Issued by
- the Storm Prediction Center
All 63 counties
Atchison County, KS, Bourbon County, KS, Doniphan County, KS, Douglas County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Miami County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Audrain County, MO, Barton County, MO, Bates County, MO, Benton County, MO, Boone County, MO, Buchanan County, MO, Caldwell County, MO, Callaway County, MO, Camden County, MO, Carroll County, MO, Cass County, MO, Cedar County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Dade County, MO, Dallas County, MO, Franklin County, MO, Gasconade County, MO, Henry County, MO, Hickory County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Laclede County, MO, Lafayette County, MO, Livingston County, MO, Maries County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Phelps County, MO, Pike County, MO, Platte County, MO, Polk County, MO, Pulaski County, MO, Ralls County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, St. Clair County, MO, Vernon County, MO, Warren County, MO
The radar
The Pleasant Hill radar (KEAX), 15 km from the middle of the area, began a volume at 04:27 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 (KTOP), launched 00:00Z, 4.4 hours before the alert went out and 133 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
- 1028 J/kg
- Mixed-layer CIN
- -353 J/kg
- Mixed-layer LCL
- 980 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 354 m²/s²
- 0-3 km storm-relative helicity
- 409 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
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 |
|---|---|---|---|---|
| Apr 8, 8:32 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 30 more | 88 min |
| Apr 8, 9:01 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Atchison, Bourbon, Brown, Butler, Chautauqua and 35 more | 7 hr |
| Apr 8, 11:01 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Butler, Chautauqua, Cherokee, Coffey and 9 more | 59 min |
| Apr 9, 1:52 AM CDT | Mesoscale Discussion | SPC | Cherokee | 53 min |
| Apr 9, 4:12 AM CDT | Mesoscale Discussion | SPC | Lincoln, Saint Charles, Saint Louis, City of Saint Louis | 93 min |
| Apr 9, 7:25 AM CDT | Severe Thunderstorm Watch | SPC | Mississippi, New Madrid | 6 hr |
Nearby
Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Kansas, 2011Every mesoscale discussion in 2011
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.