Alert archive / Ohio / Mesoscale Discussions in 2015

Mesoscale Discussion 2050

December 23, 201533 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Dec 23, 2015, 6:26 PM EST for 33 counties in Ohio. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Dec 23, 2015, 6:26 PM EST (23:26 UTC)
Expired: Dec 23, 2015, 8:30 PM EST
In force: 2 hr
Issued by: the Storm Prediction Center

All 33 counties

Ashland County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Coshocton County, OH, Crawford County, OH, Delaware County, OH, Erie County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Hancock County, OH, Hardin County, OH, Holmes County, OH, Huron County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Lorain County, OH, Madison County, OH, Marion County, OH, Medina County, OH, Morrow County, OH, Ottawa County, OH, Pickaway County, OH, Richland County, OH, Ross County, OH, Sandusky County, OH, Seneca County, OH, Union County, OH, Wayne County, OH, Wood County, OH, Wyandot County, OH

The radar

The Cleveland radar (KCLE), 131 km from the middle of the area, began a volume at 23:29 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 11.4 hours before the alert went out and 145 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: 133 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 583 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 30 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
Dec 23, 2:55 PM EST	Mesoscale Discussion	SPC	Defiance, Fulton, Henry, Lucas, Paulding, Putnam and 3 more	95 min
Dec 23, 3:16 PM EST	Mesoscale Discussion	SPC	Auglaize, Brown, Butler, Champaign, Clark, Clermont and 18 more	59 min
Dec 23, 4:17 PM EST	Severe Thunderstorm Watch	SPC	Adams, Auglaize, Brown, Butler, Champaign, Clark and 26 more	7 hr

Nearby

Mesoscale Discussions in Ohio, 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.