Alert archive / Indiana / Mesoscale Discussions in 2020

Mesoscale Discussion 1022

June 27, 202020 counties in Indiana; Preble County, Ohio

The Storm Prediction Center issued this mesoscale discussion at Jun 27, 2020, 8:48 AM EDT for 20 counties in Indiana; Preble County, Ohio. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Jun 27, 2020, 8:48 AM EDT (12:48 UTC)
Expired: Jun 27, 2020, 10:15 AM EDT
In force: 87 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch unlikely
Chance of a watch: 20%

All 21 counties

Bartholomew County, IN, Boone County, IN, Decatur County, IN, Delaware County, IN, Fayette County, IN, Franklin County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Johnson County, IN, Madison County, IN, Marion County, IN, Morgan County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Union County, IN, Wayne County, IN, Preble County, OH

The radar

The Indianapolis radar (KIND), 31 km from the middle of the area, began a volume at 12:47 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

Lincoln, IL (KILX), launched 12:00Z, 0.8 hours before the alert went out and 234 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: 1084 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 1078 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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 26, 10:40 PM EDT	Mesoscale Discussion	SPC	Adams, Allen, Benton, Blackford, Carroll, Cass and 20 more	95 min
Jun 26, 11:15 PM EDT	Severe Thunderstorm Watch	SPC	Ashland, Ashtabula, Auglaize, Crawford, Cuyahoga, Delaware and 29 more	5 hr
Jun 27, 12:35 AM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Ashtabula, Auglaize, Champaign, Crawford and 30 more	115 min
Jun 27, 2:48 AM EDT	Mesoscale Discussion	SPC	Ashland, Ashtabula, Crawford, Cuyahoga, Delaware, Geauga and 18 more	57 min

Nearby

Mesoscale Discussions in Indiana, 2020 Mesoscale Discussions in Ohio, 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.