Alert archive / Missouri / Mesoscale Discussions in 2008

Mesoscale Discussion 683

April 22, 200814 counties in Arkansas; 16 counties in Missouri; Adair County, Cherokee County, Delaware County, Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2008, 7:42 AM CDT for 14 counties in Arkansas; 16 counties in Missouri; Adair County, Cherokee County, Delaware County, Oklahoma. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued: Apr 22, 2008, 7:42 AM CDT (12:42 UTC)
Expired: Apr 22, 2008, 8:45 AM CDT
In force: 63 min
Issued by: the Storm Prediction Center

All 33 counties

Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Fulton County, AR, Izard County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Randolph County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Washington County, AR, Barry County, MO, Carter County, MO, Christian County, MO, Douglas County, MO, Greene County, MO, Howell County, MO, McDonald County, MO, Oregon County, MO, Ozark County, MO, Ripley County, MO, Shannon County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Webster County, MO, Wright County, MO, Adair County, OK, Cherokee County, OK, Delaware County, OK

The radar

The Springfield radar (KSGF), 88 km from the middle of the area, began a volume at 12:45 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.

Severe Thunderstorm Watch 213Apr 22, 7:50 AM CDT

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 0.7 hours before the alert went out and 91 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: 2654 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 645 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 374 m²/s²
0-3 km storm-relative helicity: 353 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 13.7

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 22, 7:49 AM CDT	Severe Thunderstorm Watch	SPC	Baxter, Benton, Boone, Carroll, Crawford, Franklin and 10 more	6 hr
Apr 22, 10:12 AM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Conway and 31 more	93 min
Apr 22, 10:47 AM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Clark, Cleburne, Cleveland, Conway, Craighead and 40 more	5 hr
Apr 22, 12:16 PM CDT	Mesoscale Discussion	SPC	Arkansas, Baxter, Benton, Boone, Carroll, Clark and 48 more	89 min
Apr 22, 1:51 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 25 more	54 min
Apr 22, 2:06 PM CDT	Severe Thunderstorm Watch	SPC	Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more	7 hr
Apr 22, 2:33 PM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 35 more	6 hr
Apr 22, 3:30 PM CDT	Mesoscale Discussion	SPC	Benton, Carroll, Crawford, Madison, Washington	90 min
Apr 22, 3:52 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 26 more	83 min
Apr 22, 6:51 PM CDT	Mesoscale Discussion	SPC	Benton, Carroll, Crawford, Garland, Logan, Madison and 7 more	114 min
Apr 21, 7:03 PM CDT	Severe Thunderstorm Watch	SPC	Andrew, Buchanan, Clinton, DeKalb, Holt, Platte	7 hr
Apr 21, 10:38 PM CDT	Mesoscale Discussion	SPC	Andrew, Buchanan, Clinton, DeKalb, Holt, Platte	2 hr
Apr 22, 1:14 AM CDT	Mesoscale Discussion	SPC	Barton, Bates, Caldwell, Cass, Cedar, Clay and 10 more	91 min
Apr 22, 9:41 AM CDT	Mesoscale Discussion	SPC	Cape Girardeau, Perry, Scott	94 min
Apr 21, 7:34 PM CDT	Mesoscale Discussion	SPC	Carter, Cleveland, Creek, Garfield, Garvin, Kingfisher and 9 more	86 min
Apr 21, 8:56 PM CDT	Tornado Watch	SPC	Carter, Cleveland, Coal, Creek, Garvin, Hughes and 11 more	5 hr
Apr 21, 10:29 PM CDT	Mesoscale Discussion	SPC	Carter, Cleveland, Coal, Creek, Garvin, Hughes and 11 more	91 min

Nearby

Mesoscale Discussions in Missouri, 2008 Mesoscale Discussions in Arkansas, 2008 Mesoscale Discussions in Oklahoma, 2008 Every mesoscale discussion in 2008

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.