Alert archive / Wisconsin / Mesoscale Discussions in 2003

Mesoscale Discussion 1506

June 25, 20036 counties in Michigan; 17 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 25, 2003, 2:42 PM EDT for 6 counties in Michigan; 17 counties in Wisconsin. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 25, 2003, 2:42 PM EDT (18:42 UTC)
Expired: Jun 25, 2003, 4:45 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 23 counties

Baraga County, MI, Dickinson County, MI, Houghton County, MI, Iron County, MI, Marquette County, MI, Menominee County, MI, Brown County, WI, Calumet County, WI, Columbia County, WI, Dodge County, WI, Florence County, WI, Fond du Lac County, WI, Forest County, WI, Green Lake County, WI, Marinette County, WI, Marquette County, WI, Menominee County, WI, Oconto County, WI, Outagamie County, WI, Shawano County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI

The radar

The Green Bay radar (KGRB), 82 km from the middle of the area, began a volume at 18:46 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 591Jun 25, 3:10 PM EDT

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 6.7 hours before the alert went out and 84 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: 1761 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 1014 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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
Jun 25, 3:10 PM EDT	Severe Thunderstorm Watch	SPC	Alger, Baraga, Delta, Dickinson, Iron, Marquette and 1 more	5 hr
Jun 25, 6:14 PM EDT	Mesoscale Discussion	SPC	Alger, Delta, Dickinson, Iron, Marquette, Menominee	91 min
Jun 24, 8:09 PM EDT	Mesoscale Discussion	SPC	Burnett, Dunn, Pierce, Polk, Saint Croix	66 min
Jun 24, 9:15 PM EDT	Tornado Watch	SPC	Barron, Burnett, Douglas, Dunn, Pierce, Polk and 2 more	6 hr
Jun 24, 11:27 PM EDT	Mesoscale Discussion	SPC	Pierce, Polk, Saint Croix	93 min
Jun 25, 1:37 AM EDT	Mesoscale Discussion	SPC	Buffalo, Chippewa, Clark, Eau Claire, Jackson, La Crosse and 11 more	113 min
Jun 25, 12:50 PM EDT	Mesoscale Discussion	SPC	Columbia, Dane, Dodge, Grant, Green, Green Lake and 8 more	115 min
Jun 25, 1:05 PM EDT	Severe Thunderstorm Watch	SPC	Columbia, Crawford, Dane, Dodge, Fond du Lac, Grant and 14 more	6 hr
Jun 25, 3:43 PM EDT	Mesoscale Discussion	SPC	Columbia, Dane, Dodge, Green, Iowa, Jefferson and 4 more	2 hr

Nearby

Mesoscale Discussions in Wisconsin, 2003 Mesoscale Discussions in Michigan, 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.