Alert archive / Michigan / Mesoscale Discussions in 2008

Mesoscale Discussion 110

January 29, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Jan 29, 2008, 6:15 PM CST for 4 states. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Jan 29, 2008, 6:15 PM CST (00:15 UTC)
Expired: Jan 29, 2008, 10:15 PM CST
In force: 4 hr
Issued by: the Storm Prediction Center

All 47 counties

Cook County, IL, Carroll County, IN, Cass County, IN, Elkhart County, IN, Fulton County, IN, Jasper County, IN, Lake County, IN, LaPorte County, IN, Marshall County, IN, Newton County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, White County, IN, Alger County, MI, Allegan County, MI, Baraga County, MI, Benzie County, MI, Berrien County, MI, Cass County, MI, Delta County, MI, Dickinson County, MI, Gogebic County, MI, Grand Traverse County, MI, Houghton County, MI, Iron County, MI, Kent County, MI, Lake County, MI, Leelanau County, MI, Manistee County, MI, Marquette County, MI, Mason County, MI, Mecosta County, MI, Menominee County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Ontonagon County, MI, Osceola County, MI, Ottawa County, MI, Schoolcraft County, MI, Van Buren County, MI, Wexford County, MI, Door County, WI, Florence County, WI, Kewaunee County, WI

The radar

The Green Bay radar (KGRB), 51 km from the middle of the area, began a volume at 00:18 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.3 hours before the alert went out and 49 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 558 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 150 m²/s²
0-3 km storm-relative helicity: 252 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
Jan 29, 6:06 PM CST	Severe Thunderstorm Watch	SPC	Adams, Allen, Blackford, DeKalb, Elkhart, Grant and 9 more	3 hr

Nearby

Mesoscale Discussions in Michigan, 2008 Mesoscale Discussions in Indiana, 2008 Mesoscale Discussions in Wisconsin, 2008 Every mesoscale discussion in 2008

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.