Alert archive / Michigan / Mesoscale Discussions in 2015

Mesoscale Discussion 1124

June 22, 20154 states

The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2015, 7:31 PM CDT for 4 states. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued: Jun 22, 2015, 7:31 PM CDT (00:31 UTC)
Expired: Jun 22, 2015, 8:30 PM CDT
In force: 59 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 53 counties

Cook County, IL, Lake County, IL, Benton County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Jasper County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Marshall County, IN, Newton County, IN, Noble County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, White County, IN, Whitley County, IN, Allegan County, MI, Barry County, MI, Berrien County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Gratiot County, MI, Hillsdale County, MI, Ingham County, MI, Ionia County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Monroe County, MI, Oakland County, MI, Saginaw County, MI, Saint Clair County, MI, Saint Joseph County, MI, Shiawassee County, MI, Tuscola County, MI, Van Buren County, MI, Washtenaw County, MI, Wayne County, MI, Fulton County, OH, Williams County, OH

The radar

The Grand Rapids radar (KGRR), 84 km from the middle of the area, began a volume at 00:34 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.

Tornado Watch 338Jun 22, 8:15 PM CDT

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 0.5 hours before the alert went out and 181 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: 2155 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 783 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 461 m²/s²
0-3 km storm-relative helicity: 798 m²/s²
Significant tornado parameter: 7.6
Supercell composite: 31.2

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 22, 7:34 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Hancock, Pike, Schuyler	56 min
Jun 22, 7:57 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Brown, Calhoun, Pike	4 hr
Jun 22, 8:16 PM CDT	Mesoscale Discussion	SPC	Bureau, DeWitt, Fulton, Grundy, Hancock, Henderson and 21 more	59 min
Jun 22, 8:17 PM CDT	Tornado Watch	SPC	Iroquois, Kankakee, Will	6 hr
Jun 22, 9:41 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Pike, Scott	64 min
Jun 22, 10:00 PM CDT	Mesoscale Discussion	SPC	Champaign, Cook, Douglas, Ford, Iroquois, Kankakee and 2 more	60 min
Jun 23, 1:43 AM CDT	Mesoscale Discussion	SPC	Monroe	2 hr
Jun 23, 2:30 AM CDT	Severe Thunderstorm Watch	SPC	Ashtabula, Cuyahoga, Geauga, Lake, Lorain, Medina and 3 more	3 hr
Jun 23, 4:30 AM CDT	Mesoscale Discussion	SPC	Ashtabula, Cuyahoga, Geauga, Lake, Lorain, Mahoning and 4 more	60 min
Jun 23, 9:28 AM CDT	Mesoscale Discussion	SPC	Athens, Belmont, Fairfield, Gallia, Guernsey, Harrison and 16 more	2 hr
Jun 23, 12:17 PM CDT	Severe Thunderstorm Watch	SPC	Athens, Belmont, Gallia, Guernsey, Harrison, Jackson and 10 more	7 hr
Jun 23, 2:25 PM CDT	Mesoscale Discussion	SPC	Athens, Belmont, Gallia, Jackson, Lawrence, Meigs and 5 more	95 min

Nearby

Mesoscale Discussions in Michigan, 2015 Mesoscale Discussions in Indiana, 2015 Mesoscale Discussions in Illinois, 2015 Every mesoscale discussion in 2015

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.