Alert archive / Pennsylvania / Mesoscale Discussions in 2003
Mesoscale Discussion 2494
The Storm Prediction Center issued this mesoscale discussion at Nov 12, 2003, 9:39 PM EST for 8 counties in New York; 22 counties in Pennsylvania; Brooke County, Marshall County, Ohio County, West Virginia. It was in force for 66 min.
The area
The outline as issued.
The facts
- Issued
- Nov 12, 2003, 9:39 PM EST (02:39 UTC)
- Expired
- Nov 12, 2003, 10:45 PM EST
- In force
- 66 min
- Issued by
- the Storm Prediction Center
All 33 counties
Allegany County, NY, Cattaraugus County, NY, Erie County, NY, Genesee County, NY, Livingston County, NY, Monroe County, NY, Ontario County, NY, Wyoming County, NY, Allegheny County, PA, Armstrong County, PA, Bedford County, PA, Blair County, PA, Butler County, PA, Cambria County, PA, Cameron County, PA, Clarion County, PA, Clearfield County, PA, Elk County, PA, Fayette County, PA, Forest County, PA, Greene County, PA, Indiana County, PA, Jefferson County, PA, McKean County, PA, Potter County, PA, Somerset County, PA, Venango County, PA, Warren County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Marshall County, WV, Ohio County, WV
The radar
The Buffalo radar (KBUF), 112 km from the middle of the area, began a volume at 02:40 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
Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 2.7 hours before the alert went out and 110 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
- 158 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 1117 m above ground
- 0-6 km bulk shear
- 90 kt
- 0-1 km storm-relative helicity
- 273 m²/s²
- 0-3 km storm-relative helicity
- 339 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
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 12, 7:20 PM EST | Severe Thunderstorm Watch | SPC | Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 1 more | 4 hr |
Nearby
Mesoscale Discussions in Pennsylvania, 2003Mesoscale Discussions in New York, 2003Mesoscale Discussions in West Virginia, 2003Every 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.