Alert archive / Missouri / Mesoscale Discussions in 2004

Mesoscale Discussion 759

May 19, 2004Boone County, Carroll County, Arkansas; 23 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 19, 2004, 11:38 AM CDT for Boone County, Carroll County, Arkansas; 23 counties in Missouri. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 19, 2004, 11:38 AM CDT (16:38 UTC)
Expired: May 19, 2004, 1:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 25 counties

Boone County, AR, Carroll County, AR, Barry County, MO, Benton County, MO, Camden County, MO, Cedar County, MO, Christian County, MO, Dade County, MO, Dallas County, MO, Douglas County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Johnson County, MO, Laclede County, MO, Lawrence County, MO, Miller County, MO, Morgan County, MO, Pettis County, MO, Polk County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Webster County, MO, Wright County, MO

The radar

The Springfield radar (KSGF), 28 km from the middle of the area, began a volume at 16:38 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

Springfield, MO (KSGF), launched 12:00Z, 4.6 hours before the alert went out and 74 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: 994 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 779 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.3

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
May 18, 9:17 PM CDT	Mesoscale Discussion	SPC	Audrain, Boone, Buchanan, Caldwell, Callaway, Carroll and 24 more	118 min
May 19, 2:01 AM CDT	Mesoscale Discussion	SPC	Bates, Boone, Callaway, Carroll, Cass, Clay and 11 more	3 hr

Nearby

Mesoscale Discussions in Missouri, 2004 Mesoscale Discussions in Arkansas, 2004 Every mesoscale discussion in 2004

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.