Alert archive / Pennsylvania / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 277

May 24, 20045 states

The Storm Prediction Center issued this severe thunderstorm watch at May 24, 2004, 4:55 PM EDT for 5 states. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: May 24, 2004, 4:55 PM EDT (20:55 UTC)
Expired: May 24, 2004, 9:00 PM EDT
In force: 4 hr
Issued by: the Storm Prediction Center

All 81 counties

Berkshire County, MA, Bergen County, NJ, Burlington County, NJ, Camden County, NJ, Essex County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex 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, Chenango County, NY, Columbia County, NY, Cortland County, NY, Delaware County, NY, Dutchess County, NY, Fulton County, NY, Greene County, NY, Hamilton County, NY, Herkimer County, NY, Lewis County, NY, Madison County, NY, Montgomery County, NY, Oneida County, NY, Onondaga County, NY, Orange County, NY, Otsego County, NY, Rensselaer County, NY, Rockland County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Sullivan County, NY, Tioga County, NY, Tompkins County, NY, Ulster County, NY, Warren County, NY, Washington County, NY, Adams County, PA, Berks County, PA, Bradford County, PA, Bucks County, PA, Carbon County, PA, Chester County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Delaware County, PA, Franklin County, PA, Juniata County, PA, Lackawanna County, PA, Lancaster County, PA, Lebanon County, PA, Lehigh County, PA, Luzerne County, PA, Lycoming 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, Union County, PA, Wayne County, PA, Wyoming County, PA, York County, PA, Bennington County, VT, Rutland County, VT, Windsor County, VT

The radar

The Binghamton radar (KBGM), 91 km from the middle of the area, began a volume at 20:56 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.

Warnings issued inside it

42 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
May 24, 5:00 PM EDT	Severe Thunderstorm Warning	BGM	Oneida	30 min
May 24, 5:04 PM EDT	Severe Thunderstorm Warning	ALY	Albany	56 min
May 24, 5:08 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	52 min
May 24, 5:10 PM EDT	Severe Thunderstorm Warning	ALY	Dutchess	65 min
May 24, 5:12 PM EDT	Severe Thunderstorm Warning	BGM	Broome	33 min
May 24, 5:13 PM EDT	Severe Thunderstorm Warning	ALY	Fulton, Hamilton, Herkimer	62 min
May 24, 5:15 PM EDT	Severe Thunderstorm Warning	ALY	Columbia	60 min
May 24, 5:19 PM EDT	Severe Thunderstorm Warning	BGM	Delaware	56 min
May 24, 5:22 PM EDT	Tornado Warning	BGM	Broome, Delaware	53 min
May 24, 5:22 PM EDT	Severe Thunderstorm Warning	OKX	Orange	38 min
May 24, 5:22 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery	53 min
May 24, 5:26 PM EDT	Severe Thunderstorm Warning	ALY	Saratoga	49 min
May 24, 5:34 PM EDT	Severe Thunderstorm Warning	ALY	Rensselaer	56 min
May 24, 5:45 PM EDT	Severe Thunderstorm Warning	ALY	Ulster	60 min
May 24, 5:47 PM EDT	Severe Thunderstorm Warning	BGM	Delaware	43 min
May 24, 5:51 PM EDT	Severe Thunderstorm Warning	ALY	Berkshire	54 min
May 24, 5:54 PM EDT	Severe Thunderstorm Warning	ALY	Schoharie	66 min
May 24, 5:58 PM EDT	Severe Thunderstorm Warning	ALY	Warren	62 min
May 24, 5:59 PM EDT	Severe Thunderstorm Warning	BGM	Delaware	31 min
May 24, 6:00 PM EDT	Severe Thunderstorm Warning	OKX	Orange, Rockland, Westchester	45 min
May 24, 6:03 PM EDT	Severe Thunderstorm Warning	ALY	Albany	57 min
May 24, 6:04 PM EDT	Tornado Warning	PHI	Bucks	26 min
May 24, 6:08 PM EDT	Severe Thunderstorm Warning	ALY	Montgomery, Schenectady	52 min
May 24, 6:11 PM EDT	Severe Thunderstorm Warning	ALY	Saratoga, Washington	64 min
May 24, 6:22 PM EDT	Severe Thunderstorm Warning	ALY	Greene	53 min
May 24, 6:27 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Somerset	63 min
May 24, 6:28 PM EDT	Severe Thunderstorm Warning	BGM	Delaware	62 min
May 24, 6:39 PM EDT	Severe Thunderstorm Warning	ALY	Rensselaer	66 min
May 24, 6:44 PM EDT	Tornado Warning	ALY	Rensselaer	46 min
May 24, 6:44 PM EDT	Severe Thunderstorm Warning	BGM	Otsego	46 min
May 24, 6:46 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex	59 min
May 24, 6:58 PM EDT	Severe Thunderstorm Warning	ALY	Schoharie	62 min
May 24, 7:16 PM EDT	Severe Thunderstorm Warning	ALY	Columbia, Greene	59 min
May 24, 7:25 PM EDT	Severe Thunderstorm Warning	PHI	Somerset	35 min
May 24, 7:30 PM EDT	Flash Flood Warning	ALY	Saratoga, Washington	105 min
May 24, 7:38 PM EDT	Severe Thunderstorm Warning	BGM	Delaware	52 min
May 24, 7:40 PM EDT	Severe Thunderstorm Warning	ALY	Washington	65 min
May 24, 7:44 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex	61 min
May 24, 7:48 PM EDT	Severe Thunderstorm Warning	ALY	Berkshire	57 min
May 24, 7:55 PM EDT	Flash Flood Warning	ALY	Bennington	110 min
May 24, 8:26 PM EDT	Tornado Warning	ALY	Ulster	49 min
May 24, 8:27 PM EDT	Severe Thunderstorm Warning	ALY	Greene	33 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.9 hours before the alert went out and 218 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 24, 10:03 AM EDT	Mesoscale Discussion	SPC	Berkshire	117 min
May 24, 11:00 AM EDT	Severe Thunderstorm Watch	SPC	Berkshire, Franklin, Hampden, Hampshire	5 hr
May 24, 5:43 PM EDT	Mesoscale Discussion	SPC	Berkshire	47 min
May 24, 5:45 PM EDT	Severe Thunderstorm Watch	SPC	Berkshire, Bristol, Essex, Franklin, Hampden, Hampshire and 4 more	5 hr
May 24, 7:25 PM EDT	Mesoscale Discussion	SPC	Berkshire, Bristol, Essex, Franklin, Hampden, Hampshire and 4 more	95 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

Severe Thunderstorm Watches in Pennsylvania, 2004 Severe Thunderstorm Watches in New York, 2004 Severe Thunderstorm Watches in New Jersey, 2004 Every severe thunderstorm watch 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.