Alert archive / Pennsylvania / Mesoscale Discussions in 2004
Mesoscale Discussion 861
The Storm Prediction Center issued this mesoscale discussion at May 24, 2004, 10:03 AM EDT for 4 states. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- May 24, 2004, 10:03 AM EDT (14:03 UTC)
- Expired
- May 24, 2004, 12:00 PM EDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
All 71 counties
Berkshire County, MA, Bergen County, NJ, Essex County, NJ, Hunterdon County, NJ, Morris County, NJ, Passaic County, NJ, Somerset County, NJ, Sussex County, NJ, Union County, NJ, Warren County, NJ, Albany County, NY, Broome County, NY, Chemung County, NY, Chenango County, NY, Columbia County, NY, Cortland County, NY, Delaware County, NY, Dutchess County, NY, Greene County, NY, Madison County, NY, Montgomery County, NY, Orange County, NY, Otsego County, NY, Putnam County, NY, Rensselaer County, NY, Rockland County, NY, Schenectady County, NY, Schoharie County, NY, Schuyler County, NY, Sullivan County, NY, Tioga County, NY, Tompkins County, NY, Ulster County, NY, Westchester County, NY, Bedford County, PA, Berks County, PA, Blair County, PA, Bradford County, PA, Bucks County, PA, Carbon County, PA, Centre County, PA, Chester County, PA, Clinton County, PA, Columbia County, PA, Cumberland County, PA, Dauphin 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, 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
The radar
The Binghamton radar (KBGM), 89 km from the middle of the area, began a volume at 14:03 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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 2.1 hours before the alert went out and 219 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
- 15 J/kg
- Mixed-layer CIN
- -87 J/kg
- Mixed-layer LCL
- 1572 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 119 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 |
|---|---|---|---|---|
| May 24, 11:00 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr | |
| May 24, 5:45 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr | |
| May 24, 7:25 PM EDT | Mesoscale Discussion | SPC | 95 min | |
| May 24, 4:55 PM EDT | Severe Thunderstorm Watch | SPC | Berkshire | 4 hr |
| May 24, 5:43 PM EDT | Mesoscale Discussion | SPC | Berkshire | 47 min |
| May 24, 3:00 PM EDT | Mesoscale Discussion | SPC | Bergen, Essex, Hudson, Hunterdon, Middlesex, Morris and 5 more | 90 min |
| May 23, 11:02 PM EDT | Mesoscale Discussion | SPC | Cayuga, Essex, Fulton, Hamilton, Herkimer, Lewis and 8 more | 3 hr |
| May 24, 12:24 PM EDT | Mesoscale Discussion | SPC | Allegany, Broome, Chemung, Chenango, Cortland, Ontario and 6 more | 2 hr |
| May 24, 12:40 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Broome, Cattaraugus, Chemung, Chenango, Cortland and 11 more | 4 hr |
| May 24, 12:30 AM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 10 more | 6 hr |
| May 24, 2:09 AM EDT | Mesoscale Discussion | SPC | Greene, Washington | 2 hr |
| May 24, 4:55 AM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 10 more | 95 min |
Nearby
Mesoscale Discussions in Pennsylvania, 2004Mesoscale Discussions in New York, 2004Mesoscale Discussions in New Jersey, 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.