Alert archive / Michigan / Mesoscale Discussions in 2020

Mesoscale Discussion 900

June 10, 202019 counties in Michigan

The Storm Prediction Center issued this mesoscale discussion at Jun 10, 2020, 3:03 PM EDT for 19 counties in Michigan. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Jun 10, 2020, 3:03 PM EDT (19:03 UTC)
Expired: Jun 10, 2020, 4:30 PM EDT
In force: 87 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 274...276

Counties Branch County, MI, Calhoun County, MI, Eaton County, MI, Genesee County, MI, Hillsdale County, MI, Ingham County, MI, Jackson County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Monroe County, MI, Oakland County, MI, Saint Clair County, MI, Sanilac County, MI, Shiawassee County, MI, Tuscola County, MI, Washtenaw County, MI, Wayne County, MI

The radar

The Detroit radar (KDTX), 45 km from the middle of the area, began a volume at 19:04 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

Detroit, MI (KDTX), launched 12:00Z, 7.1 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: 1134 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 651 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 218 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

As transmitted.

<!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 10, 9:44 AM EDT	Mesoscale Discussion	SPC	Allegan, Barry, Berrien, Branch, Calhoun, Cass and 14 more	91 min
Jun 10, 10:59 AM EDT	Severe Thunderstorm Watch	SPC	Allegan, Barry, Calhoun, Clare, Clinton, Eaton and 14 more	6 hr
Jun 10, 11:22 AM EDT	Mesoscale Discussion	SPC	Branch, Hillsdale, Lenawee	83 min
Jun 10, 11:54 AM EDT	Severe Thunderstorm Watch	SPC	Berrien, Branch, Cass, Hillsdale, Saint Joseph	6 hr
Jun 10, 12:17 PM EDT	Mesoscale Discussion	SPC	Alcona, Alpena, Antrim, Arenac, Bay, Cheboygan and 15 more	58 min
Jun 10, 12:41 PM EDT	Severe Thunderstorm Watch	SPC	Alcona, Alpena, Arenac, Bay, Genesee, Gladwin and 19 more	7 hr

Nearby

Mesoscale Discussions in Michigan, 2020 Every mesoscale discussion in 2020

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.