Alert archive / Ohio / Mesoscale Discussions in 2017

Mesoscale Discussion 573

April 27, 201711 counties in Kentucky; 50 counties in Ohio; 10 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Apr 27, 2017, 3:28 PM EDT for 11 counties in Kentucky; 50 counties in Ohio; 10 counties in West Virginia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Apr 27, 2017, 3:28 PM EDT (19:28 UTC)
Expired
Apr 27, 2017, 5:30 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 71 counties

Bath County, KY, Boyd County, KY, Carter County, KY, Elliott County, KY, Fleming County, KY, Greenup County, KY, Lawrence County, KY, Lewis County, KY, Menifee County, KY, Montgomery County, KY, Rowan County, KY, Adams County, OH, Ashland County, OH, Athens County, OH, Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Cuyahoga County, OH, Delaware County, OH, Erie County, OH, Fairfield County, OH, Franklin County, OH, Gallia County, OH, Geauga County, OH, Guernsey County, OH, Harrison County, OH, Hocking County, OH, Holmes County, OH, Huron County, OH, Jackson County, OH, Knox County, OH, Lake County, OH, Lawrence County, OH, Licking County, OH, Lorain County, OH, Mahoning County, OH, Marion County, OH, Medina County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Ottawa County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Portage County, OH, Richland County, OH, Ross County, OH, Scioto County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Vinton County, OH, Washington County, OH, Wayne County, OH, Cabell County, WV, Jackson County, WV, Lincoln County, WV, Mason County, WV, Pleasants County, WV, Putnam County, WV, Roane County, WV, Wayne County, WV, Wirt County, WV, Wood County, WV

The radar

The Cincinnati radar (KILN), 144 km from the middle of the area, began a volume at 19:29 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, 7.5 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2017-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 39 joules per kilogram.LCLLFCEL10008507005003002001001 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, Cncnati-Daytn, OH at 12:00Z on 2017-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 82 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
39 J/kg
Mixed-layer CIN
-264 J/kg
Mixed-layer LCL
1098 m above ground
0-6 km bulk shear
72 kt
0-1 km storm-relative helicity
82 m²/s²
0-3 km storm-relative helicity
64 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
Apr 26, 8:13 PM EDTMesoscale DiscussionSPCDefiance, Fulton, Paulding, Williams62 min

Nearby

Mesoscale Discussions in Ohio, 2017Mesoscale Discussions in Kentucky, 2017Mesoscale Discussions in West Virginia, 2017Every mesoscale discussion in 2017

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.