Alert archive / Ohio / Mesoscale Discussions in 2008

Mesoscale Discussion 1108

May 31, 200864 counties in Ohio; Beaver County, Lawrence County, Mercer County, Pennsylvania; Brooke County, Hancock County, Ohio County, West Virginia

The Storm Prediction Center issued this mesoscale discussion at May 31, 2008, 2:56 AM EDT for 64 counties in Ohio; Beaver County, Lawrence County, Mercer County, Pennsylvania; Brooke County, Hancock County, Ohio County, West Virginia. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: May 31, 2008, 2:56 AM EDT (06:56 UTC)
Expired: May 31, 2008, 4:30 AM EDT
In force: 94 min
Issued by: the Storm Prediction Center

All 70 counties

Ashland County, OH, Athens County, OH, Auglaize County, OH, Belmont County, OH, Butler County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Geauga County, OH, Greene County, OH, Guernsey County, OH, Hamilton County, OH, Hardin County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Huron County, OH, Jackson County, OH, Jefferson County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Mahoning County, OH, Marion County, OH, Medina County, OH, Meigs County, OH, Mercer County, OH, Miami County, OH, Monroe County, OH, Montgomery County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Portage County, OH, Preble County, OH, Richland County, OH, Ross County, OH, Shelby County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Union County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Wayne County, OH, Wyandot County, OH, Beaver County, PA, Lawrence County, PA, Mercer County, PA, Brooke County, WV, Hancock County, WV, Ohio County, WV

The radar

The Cleveland radar (KCLE), 143 km from the middle of the area, began a volume at 06:56 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 399May 31, 4:10 AM EDT

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 6.9 hours before the alert went out and 142 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: 279 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 1362 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.7

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
May 30, 10:16 PM EDT	Mesoscale Discussion	SPC	Butler, Darke, Mercer, Miami, Montgomery, Preble and 2 more	29 min
May 31, 12:35 AM EDT	Mesoscale Discussion	SPC	Darke, Preble	55 min
May 31, 12:56 AM EDT	Mesoscale Discussion	SPC	Allen, Auglaize, Butler, Champaign, Clark, Clinton and 27 more	34 min
May 31, 1:07 AM EDT	Tornado Watch	SPC	Auglaize, Brown, Butler, Champaign, Clark, Clermont and 24 more	3 hr
May 31, 4:10 AM EDT	Tornado Watch	SPC	Ashland, Belmont, Carroll, Champaign, Clark, Columbiana and 30 more	6 hr
May 31, 7:27 AM EDT	Mesoscale Discussion	SPC	Belmont, Guernsey, Harrison, Jefferson, Monroe, Noble	2 hr
May 31, 10:20 AM EDT	Tornado Watch	SPC	Athens, Gallia, Hocking, Lawrence, Meigs, Monroe and 5 more	7 hr
May 31, 4:28 PM EDT	Mesoscale Discussion	SPC	Athens, Belmont, Gallia, Jackson, Lawrence, Meigs and 5 more	62 min
May 31, 8:54 AM EDT	Mesoscale Discussion	SPC	Adams, Berks, Chester, Cumberland, Lancaster, Lebanon and 1 more	96 min
May 31, 2:55 PM EDT	Mesoscale Discussion	SPC	McKean, Potter, Tioga	65 min
May 31, 5:34 PM EDT	Mesoscale Discussion	SPC	Bradford, Cameron, Carbon, Centre, Clarion, Clearfield and 24 more	26 min
May 31, 3:07 PM EDT	Tornado Watch	SPC	Grant, Hardy, Pendleton	6 hr

Nearby

Mesoscale Discussions in Ohio, 2008 Mesoscale Discussions in Pennsylvania, 2008 Mesoscale Discussions in West Virginia, 2008 Every mesoscale discussion in 2008

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.