Alert archive / Nebraska / Mesoscale Discussions in 2003

Mesoscale Discussion 1063

May 18, 2003Cheyenne County, Kit Carson County, Colorado; 6 counties in Kansas; 16 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 18, 2003, 9:25 PM MDT for Cheyenne County, Kit Carson County, Colorado; 6 counties in Kansas; 16 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 18, 2003, 9:25 PM MDT (03:25 UTC)
Expired: May 18, 2003, 11:30 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 24 counties

Cheyenne County, CO, Kit Carson County, CO, Cheyenne County, KS, Decatur County, KS, Rawlins County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Blaine County, NE, Chase County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Hayes County, NE, Hitchcock County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, Red Willow County, NE, Thomas County, NE

The radar

The Goodland radar (KGLD), 92 km from the middle of the area, began a volume at 03:27 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 3.4 hours before the alert went out and 126 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: 65 J/kg
Mixed-layer CIN: -233 J/kg
Mixed-layer LCL: 826 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 0 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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, 7:24 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Elbert, Logan, Morgan, Phillips and 2 more	2 hr
May 19, 1:31 AM MDT	Mesoscale Discussion	SPC	Cloud, Decatur, Ellis, Gove, Graham, Jewell and 12 more	119 min
May 19, 2:55 PM MDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Bourbon, Butler, Chase and 24 more	95 min

Nearby

Mesoscale Discussions in Nebraska, 2003 Mesoscale Discussions in Kansas, 2003 Mesoscale Discussions in Colorado, 2003 Every mesoscale discussion in 2003

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.