Alert archive / Pennsylvania / Mesoscale Discussions in 2011
Mesoscale Discussion 1738
The Storm Prediction Center issued this mesoscale discussion at Jul 25, 2011, 5:42 PM EDT for Hunterdon County, Morris County, Warren County, New Jersey; 31 counties in Pennsylvania. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- Jul 25, 2011, 5:42 PM EDT (21:42 UTC)
- Expired
- Jul 25, 2011, 6:45 PM EDT
- In force
- 63 min
- Issued by
- the Storm Prediction Center
All 34 counties
Hunterdon County, NJ, Morris County, NJ, Warren County, NJ, Adams County, PA, Bedford County, PA, Berks County, PA, Blair County, PA, Bucks County, PA, Cambria County, PA, Carbon County, PA, Chester County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Lancaster County, PA, Lebanon County, PA, Lehigh County, PA, Luzerne County, PA, Mifflin County, PA, Monroe County, PA, Montgomery County, PA, Montour County, PA, Northampton County, PA, Northumberland County, PA, Perry County, PA, Pike County, PA, Schuylkill County, PA, Snyder County, PA, Union County, PA, York County, PA
The radar
The State College radar (KCCX), 92 km from the middle of the area, began a volume at 21:43 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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.7 hours before the alert went out and 138 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
- 481 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 760 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Jul 25, 1:12 PM EDT | Mesoscale Discussion | SPC | Camden, Cumberland, Gloucester, Salem | 2 hr |
| Jul 25, 11:12 AM EDT | Mesoscale Discussion | SPC | Butler, Cameron, Clarion, Crawford, Elk, Forest and 8 more | 63 min |
| Jul 25, 11:37 AM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Bradford, Butler, Cameron and 31 more | 7 hr |
| Jul 25, 3:16 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Bradford, Butler, Cameron and 22 more | 59 min |
Nearby
Mesoscale Discussions in Pennsylvania, 2011Mesoscale Discussions in New Jersey, 2011Every mesoscale discussion in 2011
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.