Alert archive / Pennsylvania / Mesoscale Discussions in 2013
Mesoscale Discussion 2002
The Storm Prediction Center issued this mesoscale discussion at Nov 1, 2013, 5:41 AM EDT for 5 states. It was in force for 94 min.
The area
The outline as issued.
The facts
- Issued
- Nov 1, 2013, 5:41 AM EDT (09:41 UTC)
- Expired
- Nov 1, 2013, 7:15 AM EDT
- In force
- 94 min
- Issued by
- the Storm Prediction Center
All 59 counties
Carroll County, MD, Washington County, MD, Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Broome County, NY, Chemung County, NY, Chenango County, NY, Cortland County, NY, Delaware County, NY, Otsego County, NY, Schuyler County, NY, Steuben County, NY, Sullivan County, NY, Tioga County, NY, Tompkins County, NY, Yates County, NY, Adams County, PA, Berks County, PA, Bradford County, PA, Bucks County, PA, Carbon County, PA, Chester County, PA, Clinton County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Delaware County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Lackawanna County, PA, Lancaster County, PA, Lebanon County, PA, Lehigh County, PA, Luzerne County, PA, Lycoming County, PA, Mifflin County, PA, Monroe County, PA, Montgomery County, PA, Montour County, PA, Northampton County, PA, Northumberland County, PA, Perry County, PA, Philadelphia County, PA, Pike County, PA, Schuylkill County, PA, Snyder County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga County, PA, Union County, PA, Wayne County, PA, Wyoming County, PA, York County, PA, Morgan County, WV
The radar
The Binghamton radar (KBGM), 118 km from the middle of the area, began a volume at 09:41 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.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 9.7 hours before the alert went out and 262 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.
- Mixed-layer CAPE
- 5 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 1071 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 324 m²/s²
- 0-3 km storm-relative helicity
- 479 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Nov 1, 12:46 AM EDT | Severe Thunderstorm Watch | SPC | Garrett | 5 hr |
| Nov 1, 3:37 AM EDT | Mesoscale Discussion | SPC | Allegany, Carroll, Frederick, Garrett, Washington | 83 min |
| Nov 1, 4:17 AM EDT | Severe Thunderstorm Watch | SPC | Allegany, Carroll, Frederick, Washington | 4 hr |
| Nov 1, 6:25 AM EDT | Severe Thunderstorm Watch | SPC | Atlantic, Burlington, Camden, Cumberland, Gloucester, Hunterdon and 9 more | 5 hr |
| Nov 1, 8:34 AM EDT | Mesoscale Discussion | SPC | Essex, Hunterdon, Mercer, Middlesex, Morris, Passaic and 3 more | 86 min |
| Nov 1, 10:39 AM EDT | Mesoscale Discussion | SPC | Atlantic, Ocean | 96 min |
| Oct 31, 10:09 PM EDT | Severe Thunderstorm Watch | SPC | Crawford, Erie | 6 hr |
| Nov 1, 12:39 AM EDT | Mesoscale Discussion | SPC | Crawford | 96 min |
Nearby
Mesoscale Discussions in Pennsylvania, 2013Mesoscale Discussions in New York, 2013Mesoscale Discussions in New Jersey, 2013Every mesoscale discussion in 2013
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.