Alert archive / Ohio / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 138, NWS Pittsburgh, PA

August 20, 2014Coshocton County, Ohio

NWS Pittsburgh, PA issued this severe thunderstorm warning at Aug 20, 2014, 2:18 AM EDT for Coshocton County, Ohio. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 20, 2014, 2:18 AM EDT (06:18 UTC)
Expired: Aug 20, 2014, 2:45 AM EDT
In force: 27 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon

County Coshocton County, OH

The radar

The Cleveland radar (KCLE), 124 km from the middle of the area, began a volume at 06:18 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

Pittsburgh, PA (KAGC), launched 00:00Z, 6.3 hours before the alert went out and 155 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: 570 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 1401 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 50 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Pittsburgh, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 20, 1:41 AM EDT, 37 minutes earlier.

Area forecast discussion, Aug 20, 1:41 AM EDT, 37 minutes before

<!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>

Hazardous weather outlook, Aug 19, 4:11 AM EDT, 22 hours 7 minutes before

<!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>

The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 20, 9:28 AM EDT	Areal Flood Advisory	PBZ	Washington	2 hr
Aug 20, 10:04 AM EDT	Special Weather Statement	PBZ	Somerset	26 min
Aug 20, 5:18 AM EDT	Flash Flood Warning	PBZ	Carroll, Tuscarawas	7 hr
Aug 20, 7:42 AM EDT	Areal Flood Advisory	PBZ	Belmont, Harrison, Jefferson	108 min
Aug 20, 8:21 AM EDT	Areal Flood Advisory	PBZ	Belmont	114 min
Aug 20, 9:16 AM EDT	Areal Flood Warning	PBZ	Belmont, Harrison, Jefferson	6 hr
Aug 20, 12:15 PM EDT	Areal Flood Warning	PBZ	Carroll, Tuscarawas	6 hr
Aug 20, 4:24 PM EDT	Special Weather Statement	PBZ	Tuscarawas	51 min

Nearby

Severe Thunderstorm Warnings in Ohio, 2014 Every severe thunderstorm warning in 2014

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.