Alert archive / Missouri / Mesoscale Discussions in 2013

Mesoscale Discussion 74

January 29, 20134 states

The Storm Prediction Center issued this mesoscale discussion at Jan 29, 2013, 3:31 PM CST for 4 states. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Jan 29, 2013, 3:31 PM CST (21:31 UTC)
Expired: Jan 29, 2013, 5:00 PM CST
In force: 89 min
Issued by: the Storm Prediction Center

All 47 counties

Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Cleburne County, AR, Crawford County, AR, Franklin County, AR, Fulton County, AR, Izard County, AR, Johnson County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Pope County, AR, Searcy County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, Calhoun County, IL, Greene County, IL, Jersey County, IL, Monroe County, IL, City of Saint Louis, MO, Crawford County, MO, Dent County, MO, Douglas County, MO, Franklin County, MO, Gasconade County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Lincoln County, MO, Oregon County, MO, Ozark County, MO, Phelps County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Shannon County, MO, Taney County, MO, Texas County, MO, Warren County, MO, Washington County, MO, Wright County, MO, Adair County, OK, Sequoyah County, OK

The radar

The Springfield radar (KSGF), 93 km from the middle of the area, began a volume at 21:31 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.5 hours before the alert went out and 131 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: 285 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 728 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 257 m²/s²
0-3 km storm-relative helicity: 224 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 1.4

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
Jan 29, 7:26 AM CST	Tornado Watch	SPC	Benton, Carroll, Crawford, Madison, Washington	10 hr
Jan 29, 9:46 AM CST	Mesoscale Discussion	SPC	Crawford, Franklin, Hempstead, Howard, Johnson, Little River and 9 more	119 min
Jan 29, 10:59 AM CST	Tornado Watch	SPC	Franklin, Hempstead, Howard, Johnson, Little River, Logan and 9 more	8 hr
Jan 29, 11:05 AM CST	Mesoscale Discussion	SPC	Benton, Carroll, Crawford, Madison, Washington	55 min
Jan 29, 11:54 AM CST	Mesoscale Discussion	SPC	Baxter, Boone, Fulton, Izard, Marion, Newton and 3 more	96 min
Jan 29, 12:35 PM CST	Tornado Watch	SPC	Baxter, Boone, Cleburne, Conway, Fulton, Izard and 6 more	7 hr
Jan 29, 1:19 PM CST	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Crawford, Madison, Washington	56 min
Jan 29, 2:15 PM CST	Mesoscale Discussion	SPC	Howard, Little River, Logan, Polk, Scott, Sebastian and 1 more	2 hr
Jan 29, 4:37 PM CST	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Chicot, Desha, Drew and 5 more	2 hr
Jan 29, 4:58 PM CST	Mesoscale Discussion	SPC	Baxter, Boone, Bradley, Calhoun, Clark, Cleburne and 47 more	92 min
Jan 29, 5:37 PM CST	Tornado Watch	SPC	Arkansas, Ashley, Baxter, Boone, Bradley, Calhoun and 62 more	8 hr
Jan 28, 9:59 PM CST	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 20 more	2 hr
Jan 29, 12:51 AM CST	Mesoscale Discussion	SPC	Barton, Bates, Benton, Buchanan, Caldwell, Camden and 27 more	84 min
Jan 29, 5:41 AM CST	Mesoscale Discussion	SPC	Barton, Bates, Benton, Cass, Cedar, Dade and 10 more	94 min
Jan 28, 9:29 PM CST	Mesoscale Discussion	SPC	Cleveland, Creek, Lincoln, Logan, Noble, Oklahoma and 4 more	2 hr
Jan 29, 3:28 AM CST	Mesoscale Discussion	SPC	Alfalfa, Blaine, Caddo, Canadian, Comanche, Cotton and 16 more	92 min
Jan 29, 4:57 AM CST	Tornado Watch	SPC	Alfalfa, Blaine, Caddo, Canadian, Cleveland, Comanche and 27 more	7 hr
Jan 29, 10:37 AM CST	Mesoscale Discussion	SPC	Love	53 min

Nearby

Mesoscale Discussions in Missouri, 2013 Mesoscale Discussions in Arkansas, 2013 Mesoscale Discussions in Illinois, 2013 Every mesoscale discussion in 2013

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.