Alert archive / West Virginia / Mesoscale Discussions in 2003

Mesoscale Discussion 1884

July 18, 20035 states

The Storm Prediction Center issued this mesoscale discussion at Jul 18, 2003, 4:49 PM EDT for 5 states. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Jul 18, 2003, 4:49 PM EDT (20:49 UTC)
Expired: Jul 18, 2003, 6:45 PM EDT
In force: 116 min
Issued by: the Storm Prediction Center

All 64 counties

Allegany County, MD, Garrett County, MD, Athens County, OH, Belmont County, OH, Carroll County, OH, Coshocton County, OH, Fairfield County, OH, Guernsey County, OH, Harrison County, OH, Hocking County, OH, Jefferson County, OH, Licking County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Tuscarawas County, OH, Washington County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Bedford County, PA, Cambria County, PA, Fayette County, PA, Greene County, PA, Indiana County, PA, Somerset County, PA, Washington County, PA, Westmoreland County, PA, City of Winchester, VA, Frederick County, VA, Barbour County, WV, Berkeley County, WV, Braxton County, WV, Brooke County, WV, Calhoun County, WV, Doddridge County, WV, Gilmer County, WV, Grant County, WV, Hampshire County, WV, Hancock County, WV, Hardy County, WV, Harrison County, WV, Jackson County, WV, Lewis County, WV, Marion County, WV, Marshall County, WV, Mineral County, WV, Monongalia County, WV, Morgan County, WV, Ohio County, WV, Pleasants County, WV, Preston County, WV, Ritchie County, WV, Roane County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Upshur County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Pittsburgh radar (KPBZ), 109 km from the middle of the area, began a volume at 20:52 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 (KPIT), launched 12:00Z, 8.8 hours before the alert went out and 106 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: 270 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 1045 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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
Jul 18, 1:14 PM EDT	Mesoscale Discussion	SPC	Charles	2 hr
Jul 18, 1:35 PM EDT	Mesoscale Discussion	SPC	Athens, Belmont, Carroll, Columbiana, Coshocton, Delaware and 26 more	115 min
Jul 18, 1:55 PM EDT	Severe Thunderstorm Watch	SPC	Athens, Belmont, Carroll, Columbiana, Coshocton, Delaware and 17 more	6 hr
Jul 18, 6:47 PM EDT	Mesoscale Discussion	SPC	Athens, Belmont, Carroll, Coshocton, Delaware, Fairfield and 16 more	88 min

Nearby

Mesoscale Discussions in West Virginia, 2003 Mesoscale Discussions in Ohio, 2003 Mesoscale Discussions in Pennsylvania, 2003 Every mesoscale discussion in 2003

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.