Alert archive / Pennsylvania / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 488

July 1, 20014 counties in New Jersey; 48 counties in Pennsylvania

The Storm Prediction Center issued this severe thunderstorm watch at Jul 1, 2001, 12:00 PM EDT for 4 counties in New Jersey; 48 counties in Pennsylvania. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jul 1, 2001, 12:00 PM EDT (16:00 UTC)
Expired: Jul 1, 2001, 6:00 PM EDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 52 counties

Camden County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Warren County, NJ, Adams County, PA, Bedford County, PA, Berks County, PA, Blair County, PA, Bradford County, PA, Bucks County, PA, Cambria County, PA, Cameron County, PA, Carbon County, PA, Centre County, PA, Chester County, PA, Clearfield County, PA, Clinton County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Delaware County, PA, Elk County, PA, Franklin County, PA, Fulton 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, McKean County, PA, Mifflin 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, Potter 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

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jul 1, 12:09 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	66 min
Jul 1, 12:24 PM EDT	Severe Thunderstorm Warning	BGM	Luzerne	66 min
Jul 1, 12:33 PM EDT	Severe Thunderstorm Warning	CTP	Elk	57 min
Jul 1, 12:42 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Potter	63 min
Jul 1, 12:47 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	58 min
Jul 1, 1:09 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	36 min
Jul 1, 1:20 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	55 min
Jul 1, 1:20 PM EDT	Severe Thunderstorm Warning	PHI	Carbon	25 min
Jul 1, 1:26 PM EDT	Severe Thunderstorm Warning	PHI	Berks	64 min
Jul 1, 1:36 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	54 min
Jul 1, 1:48 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	42 min
Jul 1, 1:53 PM EDT	Severe Thunderstorm Warning	CTP	Clinton	67 min
Jul 1, 2:00 PM EDT	Severe Thunderstorm Warning	CTP	Cambria	60 min
Jul 1, 2:03 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	42 min
Jul 1, 2:09 PM EDT	Severe Thunderstorm Warning	CTP	Centre	66 min
Jul 1, 2:10 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna	35 min
Jul 1, 2:13 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Sullivan	62 min
Jul 1, 2:30 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	45 min
Jul 1, 2:36 PM EDT	Severe Thunderstorm Warning	BGM	Luzerne	54 min
Jul 1, 2:44 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	61 min
Jul 1, 3:02 PM EDT	Severe Thunderstorm Warning	CTP	Columbia	58 min
Jul 1, 3:14 PM EDT	Flash Flood Warning	CTP	Cambria	3 hr
Jul 1, 3:14 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Perry	61 min
Jul 1, 3:28 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Huntingdon	62 min
Jul 1, 3:53 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin	67 min
Jul 1, 3:58 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin	62 min
Jul 1, 4:06 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	39 min
Jul 1, 4:06 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	39 min
Jul 1, 4:08 PM EDT	Severe Thunderstorm Warning	CTP	Lebanon	37 min
Jul 1, 4:23 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris	52 min
Jul 1, 4:32 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	73 min
Jul 1, 4:35 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Montgomery	40 min
Jul 1, 4:37 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	68 min
Jul 1, 5:15 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	45 min
Jul 1, 5:15 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	45 min

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 4.0 hours before the alert went out and 236 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: 737 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 1231 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 1, 3:00 PM EDT	Severe Thunderstorm Watch	SPC	Bergen, Essex, Hudson, Middlesex, Morris, Passaic and 3 more	6 hr
Jul 1, 4:30 PM EDT	Severe Thunderstorm Watch	SPC	Atlantic, Burlington, Camden, Cumberland, Gloucester, Hunterdon and 5 more	5 hr
Jul 1, 6:30 PM EDT	Severe Thunderstorm Watch	SPC	Cape May	6 hr
Jul 1, 12:00 PM EDT	Severe Thunderstorm Watch	SPC	Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 11 more	6 hr

Nearby

Severe Thunderstorm Watches in Pennsylvania, 2001 Severe Thunderstorm Watches in New Jersey, 2001 Every severe thunderstorm watch in 2001

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.