Alert archive / Kansas / Mesoscale Discussions in 2011

Mesoscale Discussion 513

April 22, 201117 counties in Kansas; 8 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2011, 5:18 AM CDT for 17 counties in Kansas; 8 counties in Missouri. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Apr 22, 2011, 5:18 AM CDT (10:18 UTC)
Expired: Apr 22, 2011, 6:45 AM CDT
In force: 87 min
Issued by: the Storm Prediction Center

All 25 counties

Atchison County, KS, Brown County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Marshall County, KS, Miami County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Buchanan County, MO, Caldwell County, MO, Cass County, MO, Clay County, MO, Clinton County, MO, Jackson County, MO, Platte County, MO, Ray County, MO

The radar

The Pleasant Hill radar (KEAX), 73 km from the middle of the area, began a volume at 10:20 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, 10.3 hours before the alert went out and 57 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1049 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 292 m²/s²
0-3 km storm-relative helicity: 537 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 21, 11:27 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Bourbon, Brown, Butler and 49 more	3 hr
Apr 22, 2:48 AM CDT	Severe Thunderstorm Watch	SPC	Anderson, Atchison, Brown, Chase, Clay, Cloud and 31 more	4 hr
Apr 22, 10:09 AM CDT	Mesoscale Discussion	SPC	Bollinger, Cape Girardeau, Crawford, Dent, Franklin, Gasconade and 17 more	66 min
Apr 22, 10:44 AM CDT	Mesoscale Discussion	SPC	Barry, Bollinger, Carter, Christian, Crawford, Dent and 19 more	61 min
Apr 22, 1:04 PM CDT	Mesoscale Discussion	SPC	Barry, Barton, Benton, Callaway, Camden, Cedar and 40 more	116 min
Apr 22, 1:23 PM CDT	Mesoscale Discussion	SPC	McDonald, Newton	97 min
Apr 22, 3:34 PM CDT	Tornado Watch	SPC	Audrain, Barry, Benton, Boone, Callaway, Camden and 46 more	6 hr
Apr 22, 5:21 PM CDT	Mesoscale Discussion	SPC	Audrain, Barry, Boone, Callaway, Camden, Christian and 36 more	114 min
Apr 22, 5:27 PM CDT	Mesoscale Discussion	SPC	Cape Girardeau, Perry, Sainte Genevieve, Saint Francois	33 min
Apr 22, 5:49 PM CDT	Tornado Watch	SPC	Bollinger, Butler, Cape Girardeau, Carter, Iron, Madison and 9 more	7 hr

Nearby

Mesoscale Discussions in Kansas, 2011 Mesoscale Discussions in Missouri, 2011 Every 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.