Alert archive / Missouri / Mesoscale Discussions in 2014

Mesoscale Discussion 117

February 20, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Feb 20, 2014, 4:24 AM CST for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Feb 20, 2014, 4:24 AM CST (10:24 UTC)
Expired: Feb 20, 2014, 6:30 AM CST
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 35 counties

Decatur County, IA, Ringgold County, IA, Atchison County, KS, Brown County, KS, Clay County, KS, Dickinson County, KS, Doniphan County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Leavenworth County, KS, Nemaha County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Andrew County, MO, Buchanan County, MO, Caldwell County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Livingston County, MO, Mercer County, MO, Nodaway County, MO, Platte County, MO, Sullivan County, MO, Worth County, MO, Richardson County, NE

The radar

The Topeka radar (KTWX), 123 km from the middle of the area, began a volume at 10:27 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 (KFOE), launched 00:00Z, 10.4 hours before the alert went out and 98 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: 1831 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 316 m²/s²
0-3 km storm-relative helicity: 540 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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
Feb 20, 5:28 AM CST	Mesoscale Discussion	SPC	Cherokee, Harrison, Lyon, Monona, O'Brien, Osceola and 3 more	5 hr
Feb 20, 10:20 AM CST	Mesoscale Discussion	SPC	Appanoose, Benton, Buchanan, Cedar, Clarke, Clinton and 31 more	85 min
Feb 20, 11:20 AM CST	Mesoscale Discussion	SPC	Adair, Audubon, Black Hawk, Boone, Bremer, Buena Vista and 39 more	6 hr
Feb 20, 2:43 AM CST	Mesoscale Discussion	SPC	Benton, Camden, Cedar, Cole, Crawford, Dade and 29 more	3 hr
Feb 20, 11:34 AM CST	Mesoscale Discussion	SPC	Audrain, Boone, Callaway, Camden, Chariton, Cole and 25 more	116 min
Feb 20, 1:36 PM CST	Severe Thunderstorm Watch	SPC	Crawford, Franklin, Gasconade, Iron, Jefferson, Lincoln and 12 more	4 hr
Feb 20, 1:45 PM CST	Mesoscale Discussion	SPC	Dunklin, Mississippi, New Madrid, Pemiscot, Scott, Stoddard	2 hr
Feb 20, 2:23 PM CST	Tornado Watch	SPC	Bollinger, Butler, Cape Girardeau, Carter, Dunklin, Mississippi and 7 more	7 hr
Feb 20, 3:23 PM CST	Mesoscale Discussion	SPC	Jefferson, Saint Charles, Saint Louis, City of Saint Louis	97 min
Feb 20, 5:29 PM CST	Mesoscale Discussion	SPC	Bollinger, Cape Girardeau, Dunklin, Mississippi, New Madrid, Pemiscot and 3 more	46 min

Nearby

Mesoscale Discussions in Missouri, 2014 Mesoscale Discussions in Kansas, 2014 Mesoscale Discussions in Iowa, 2014 Every mesoscale discussion in 2014

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.