Alert archive / Pennsylvania / Mesoscale Discussions in 2004
Mesoscale Discussion 1416
The Storm Prediction Center issued this mesoscale discussion at Jun 24, 2004, 10:28 PM EDT for 29 counties in Pennsylvania; Brooke County, Hancock County, West Virginia. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 24, 2004, 10:28 PM EDT (02:28 UTC)
- Expired
- Jun 25, 2004, 12:30 AM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 31 counties
Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Blair County, PA, Butler County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clarion County, PA, Clearfield County, PA, Clinton County, PA, Crawford County, PA, Elk County, PA, Forest County, PA, Huntingdon County, PA, Indiana County, PA, Jefferson County, PA, Juniata County, PA, Lawrence County, PA, McKean County, PA, Mercer County, PA, Mifflin County, PA, Perry County, PA, Potter County, PA, Snyder County, PA, Venango County, PA, Warren County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV
The radar
The Pittsburgh radar (KPBZ), 76 km from the middle of the area, began a volume at 02:29 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 00:00Z, 2.5 hours before the alert went out and 77 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
- 188 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 1645 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 8:10 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Blair, Butler, Cambria and 26 more | 5 hr |
| Jun 25, 1:08 PM EDT | Mesoscale Discussion | SPC | Adams, Bucks, Chester, Delaware, Lancaster, Montgomery and 2 more | 2 hr |
| Jun 25, 1:45 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Bucks, Chester, Cumberland, Delaware, Franklin and 6 more | 7 hr |
| Jun 25, 4:14 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Chester, Delaware, Lancaster, Montgomery and 2 more | 2 hr |
Nearby
Mesoscale Discussions in Pennsylvania, 2004Mesoscale Discussions in West Virginia, 2004Every 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; radar from the NEXRAD Level II archive.