Alert archive / Michigan / Mesoscale Discussions in 2003

Mesoscale Discussion 2250

August 25, 200320 counties in Michigan; Door County, Florence County, Forest County, Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Aug 25, 2003, 6:41 PM EDT for 20 counties in Michigan; Door County, Florence County, Forest County, Wisconsin. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Aug 25, 2003, 6:41 PM EDT (22:41 UTC)
Expired: Aug 25, 2003, 8:15 PM EDT
In force: 94 min
Issued by: the Storm Prediction Center

All 23 counties

Alpena County, MI, Antrim County, MI, Charlevoix County, MI, Cheboygan County, MI, Chippewa County, MI, Crawford County, MI, Delta County, MI, Dickinson County, MI, Emmet County, MI, Grand Traverse County, MI, Kalkaska County, MI, Leelanau County, MI, Luce County, MI, Mackinac County, MI, Menominee County, MI, Montmorency County, MI, Oscoda County, MI, Otsego County, MI, Presque Isle County, MI, Schoolcraft County, MI, Door County, WI, Florence County, WI, Forest County, WI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 10.7 hours before the alert went out and 260 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: 608 J/kg
Mixed-layer CIN: -237 J/kg
Mixed-layer LCL: 1299 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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
Aug 25, 7:43 PM EDT	Mesoscale Discussion	SPC	Allegan, Barry, Calhoun, Eaton, Kalamazoo, Kent and 2 more	2 hr
Aug 25, 12:33 PM EDT	Mesoscale Discussion	SPC	Barron, Buffalo, Burnett, Chippewa, Clark, Dunn and 17 more	117 min
Aug 25, 6:20 PM EDT	Severe Thunderstorm Watch	SPC	Crawford, Grant, La Crosse, Monroe, Vernon	6 hr

Nearby

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