Alert archive / Michigan / Mesoscale Discussions in 2016

Mesoscale Discussion 1307

July 17, 20166 counties in Michigan; Cook County, Lake County, Minnesota; 5 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jul 17, 2016, 3:35 PM EDT for 6 counties in Michigan; Cook County, Lake County, Minnesota; 5 counties in Wisconsin. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued
Jul 17, 2016, 3:35 PM EDT (19:35 UTC)
Expired
Jul 17, 2016, 5:30 PM EDT
In force
115 min
Issued by
the Storm Prediction Center
Chance of a watch
20%

Counties Baraga County, MI, Gogebic County, MI, Houghton County, MI, Iron County, MI, Keweenaw County, MI, Ontonagon County, MI, Cook County, MN, Lake County, MN, Ashland County, WI, Bayfield County, WI, Douglas County, WI, Iron County, WI, Vilas County, WI

The radar

The Duluth radar (KDLH), 137 km from the middle of the area, began a volume at 19:35 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

Minneapolis, MN (KMPX), launched 12:00Z, 7.6 hours before the alert went out and 360 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-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 2016-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2016-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 99 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
1243 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
99 m²/s²
0-3 km storm-relative helicity
129 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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.

IssuedProductOfficeCountiesLasted
Jul 16, 9:55 PM EDTMesoscale DiscussionSPCBlue Earth, Brown, Cottonwood, Dodge, Faribault, Freeborn and 17 more95 min
Jul 17, 8:00 AM EDTMesoscale DiscussionSPCKenosha, Milwaukee, Racine, Rock, Walworth2 hr

Nearby

Mesoscale Discussions in Michigan, 2016Mesoscale Discussions in Wisconsin, 2016Mesoscale Discussions in Minnesota, 2016Every mesoscale discussion in 2016

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.