Alert archive / Kansas / Mesoscale Discussions in 2004

Mesoscale Discussion 1578

July 9, 200420 counties in Kansas; 6 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 9, 2004, 12:19 AM CDT for 20 counties in Kansas; 6 counties in Nebraska. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: Jul 9, 2004, 12:19 AM CDT (05:19 UTC)
Expired: Jul 9, 2004, 1:15 AM CDT
In force: 56 min
Issued by: the Storm Prediction Center

All 26 counties

Clay County, KS, Cloud County, KS, Dickinson County, KS, Ellis County, KS, Ellsworth County, KS, Geary County, KS, Jewell County, KS, Lincoln County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Mitchell County, KS, Osborne County, KS, Ottawa County, KS, Republic County, KS, Rice County, KS, Riley County, KS, Russell County, KS, Saline County, KS, Washington County, KS, Gage County, NE, Jefferson County, NE, Nuckolls County, NE, Pawnee County, NE, Saline County, NE, Thayer County, NE

The radar

The Topeka radar (KTWX), 133 km from the middle of the area, began a volume at 05:20 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 watches that followed

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

Severe Thunderstorm Watch 595Jul 9, 12:45 AM CDT

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 5.3 hours before the alert went out and 183 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: 1519 J/kg
Mixed-layer CIN: -301 J/kg
Mixed-layer LCL: 1532 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 167 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
Jul 8, 9:05 PM CDT	Mesoscale Discussion	SPC	Clark, Comanche, Meade, Seward	115 min
Jul 8, 9:45 PM CDT	Severe Thunderstorm Watch	SPC	Decatur, Norton, Phillips, Smith	6 hr
Jul 8, 10:58 PM CDT	Mesoscale Discussion	SPC	Decatur, Norton, Phillips, Rawlins, Smith	92 min
Jul 9, 12:45 AM CDT	Severe Thunderstorm Watch	SPC	Barton, Brown, Chase, Clay, Cloud, Dickinson and 27 more	4 hr
Jul 9, 2:46 AM CDT	Mesoscale Discussion	SPC	Barton, Chase, Clay, Cloud, Dickinson, Ellis and 27 more	89 min
Jul 8, 8:05 PM CDT	Severe Thunderstorm Watch	SPC	Blaine, Brown, Chase, Custer, Dawson, Frontier and 13 more	6 hr
Jul 9, 1:03 AM CDT	Mesoscale Discussion	SPC	Chase, Dundy, Frontier, Hayes, Hitchcock, Red Willow	57 min
Jul 9, 2:02 PM CDT	Mesoscale Discussion	SPC	Banner, Kimball, Scotts Bluff	118 min
Jul 9, 6:59 PM CDT	Mesoscale Discussion	SPC	Arthur, Banner, Box Butte, Cheyenne, Dawes, Deuel and 7 more	106 min

Nearby

Mesoscale Discussions in Kansas, 2004 Mesoscale Discussions in Nebraska, 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.