Alert archive / New Jersey / Mesoscale Discussions in 2004

Mesoscale Discussion 579

May 7, 20044 states

The Storm Prediction Center issued this mesoscale discussion at May 7, 2004, 1:24 PM EDT for 4 states. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: May 7, 2004, 1:24 PM EDT (17:24 UTC)
Expired: May 7, 2004, 3:00 PM EDT
In force: 96 min
Issued by: the Storm Prediction Center

Counties Kent County, DE, New Castle County, DE, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Mercer County, NJ, Salem County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 5.4 hours before the alert went out and 50 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: 443 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 793 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 170 m²/s²
0-3 km storm-relative helicity: 152 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
May 7, 10:29 AM EDT	Mesoscale Discussion	SPC	New Castle	91 min
May 7, 1:40 PM EDT	Severe Thunderstorm Watch	SPC	Kent, New Castle, Sussex	3 hr
May 7, 4:35 PM EDT	Severe Thunderstorm Watch	SPC	Kent, Sussex	5 hr
May 7, 6:17 PM EDT	Mesoscale Discussion	SPC	Kent, Sussex	118 min
May 7, 11:00 AM EDT	Severe Thunderstorm Watch	SPC	Allegany, Anne Arundel, Baltimore, Carroll, Frederick, Garrett and 5 more	6 hr
May 7, 1:49 PM EDT	Mesoscale Discussion	SPC	Allegany, Garrett, Washington	86 min
May 6, 11:05 PM EDT	Mesoscale Discussion	SPC	Clarion, Crawford, Erie, Forest, Lawrence, McKean and 3 more	85 min
May 6, 11:20 PM EDT	Severe Thunderstorm Watch	SPC	Armstrong, Beaver, Butler, Clarion, Clearfield, Crawford and 9 more	5 hr
May 7, 3:13 AM EDT	Mesoscale Discussion	SPC	Armstrong, Beaver, Butler, Clarion, Clearfield, Crawford and 9 more	62 min

Nearby

Mesoscale Discussions in New Jersey, 2004 Mesoscale Discussions in Pennsylvania, 2004 Mesoscale Discussions in Maryland, 2004 Every mesoscale discussion in 2004

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.