Alert archive / New York / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 738

August 11, 20046 states

The Storm Prediction Center issued this severe thunderstorm watch at Aug 11, 2004, 12:55 PM EDT for 6 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Aug 11, 2004, 12:55 PM EDT (16:55 UTC)
Expired: Aug 11, 2004, 8:00 PM EDT
In force: 7 hr
Issued by: the Storm Prediction Center

All 107 counties

Berkshire County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Cheshire County, NH, Coos County, NH, Grafton County, NH, Merrimack County, NH, Sullivan County, NH, Bergen County, NJ, Burlington County, NJ, Camden County, NJ, Essex County, NJ, Gloucester County, NJ, Hudson County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Passaic County, NJ, Somerset County, NJ, Sussex County, NJ, Union County, NJ, Warren County, NJ, Albany County, NY, Bronx County, NY, Broome County, NY, Chenango County, NY, Clinton County, NY, Columbia County, NY, Delaware County, NY, Dutchess County, NY, Essex County, NY, Franklin County, NY, Fulton County, NY, Greene County, NY, Hamilton County, NY, Herkimer County, NY, Kings County, NY, Madison County, NY, Montgomery County, NY, Nassau County, NY, New York County, NY, Oneida County, NY, Orange County, NY, Otsego County, NY, Putnam County, NY, Queens County, NY, Rensselaer County, NY, Richmond County, NY, Rockland County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Sullivan County, NY, Tioga County, NY, Ulster County, NY, Warren County, NY, Washington County, NY, Westchester 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, Lackawanna County, PA, Lancaster County, PA, Lebanon County, PA, Lehigh County, PA, Luzerne 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, Addison County, VT, Bennington County, VT, Caledonia County, VT, Chittenden County, VT, Essex County, VT, Franklin County, VT, Grand Isle County, VT, Lamoille County, VT, Orange County, VT, Orleans County, VT, Rutland County, VT, Washington County, VT, Windham County, VT, Windsor County, VT

The radar

The Binghamton radar (KBGM), 95 km from the middle of the area, began a volume at 16:57 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

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

Issued	Product	Office	Counties	Lasted
Aug 11, 1:00 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Somerset	60 min
Aug 11, 1:34 PM EDT	Severe Thunderstorm Warning	OKX	Passaic	26 min
Aug 11, 1:44 PM EDT	Severe Thunderstorm Warning	PHI	Morris	46 min
Aug 11, 2:02 PM EDT	Severe Thunderstorm Warning	PHI	Somerset	28 min
Aug 11, 2:17 PM EDT	Severe Thunderstorm Warning	OKX	Putnam	58 min
Aug 11, 2:21 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	54 min
Aug 11, 2:22 PM EDT	Severe Thunderstorm Warning	OKX	Putnam	53 min
Aug 11, 2:26 PM EDT	Severe Thunderstorm Warning	OKX	Bergen	49 min
Aug 11, 2:26 PM EDT	Severe Thunderstorm Warning	ALY	Dutchess	34 min
Aug 11, 2:28 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	62 min
Aug 11, 2:29 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire	46 min
Aug 11, 2:35 PM EDT	Severe Thunderstorm Warning	OKX	Bronx, New York	25 min
Aug 11, 2:40 PM EDT	Severe Thunderstorm Warning	PHI	Chester	95 min
Aug 11, 2:45 PM EDT	Severe Thunderstorm Warning	OKX	Westchester	45 min
Aug 11, 2:52 PM EDT	Tornado Warning	CTP	Lancaster	38 min
Aug 11, 3:12 PM EDT	Tornado Warning	PHI	Chester	78 min
Aug 11, 3:27 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Somerset	78 min
Aug 11, 3:59 PM EDT	Flash Flood Warning	OKX	Kings, Queens	3 hr
Aug 11, 4:04 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	41 min
Aug 11, 4:29 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	61 min
Aug 11, 4:31 PM EDT	Severe Thunderstorm Warning	GYX	Sullivan	44 min
Aug 11, 4:31 PM EDT	Flash Flood Warning	CTP	Lancaster	6 hr
Aug 11, 4:36 PM EDT	Flash Flood Warning	OKX	Nassau	114 min
Aug 11, 4:52 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	23 min
Aug 11, 5:18 PM EDT	Severe Thunderstorm Warning	BTV	Orange	57 min
Aug 11, 5:25 PM EDT	Severe Thunderstorm Warning	PHI	Berks	65 min
Aug 11, 5:28 PM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	32 min
Aug 11, 5:37 PM EDT	Severe Thunderstorm Warning	PHI	Burlington	53 min
Aug 11, 5:53 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex	67 min
Aug 11, 5:56 PM EDT	Severe Thunderstorm Warning	PHI	Montgomery	34 min
Aug 11, 6:18 PM EDT	Flash Flood Warning	OKX	Kings, Queens	3 hr
Aug 11, 6:19 PM EDT	Severe Thunderstorm Warning	PHI	Mercer	41 min
Aug 11, 6:32 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Somerset	73 min
Aug 11, 6:47 PM EDT	Flash Flood Warning	PHI	Middlesex	118 min
Aug 11, 7:08 PM EDT	Severe Thunderstorm Warning	PHI	Mercer	32 min
Aug 11, 7:45 PM EDT	Flash Flood Warning	PHI	Monmouth	2 hr
Aug 11, 7:58 PM EDT	Flash Flood Warning	PHI	Mercer	2 hr

Discussions around it

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

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 4.9 hours before the alert went out and 136 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: 492 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 771 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 11, 11:59 AM EDT	Mesoscale Discussion	SPC		91 min
Aug 11, 7:00 PM EDT	Mesoscale Discussion	SPC		90 min
Aug 11, 4:18 PM EDT	Mesoscale Discussion	SPC	Barnstable, Bristol, Dukes, Essex, Nantucket, Norfolk and 2 more	87 min
Aug 11, 2:35 PM EDT	Severe Thunderstorm Watch	SPC	Atlantic, Cape May, Cumberland, Gloucester, Salem	5 hr
Aug 11, 7:26 PM EDT	Mesoscale Discussion	SPC	Atlantic, Cape May, Cumberland, Salem	64 min

Nearby

Severe Thunderstorm Watches in New York, 2004 Severe Thunderstorm Watches in Pennsylvania, 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.