Alert archive / Pennsylvania / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 289

May 13, 200029 counties in Pennsylvania

The Storm Prediction Center issued this severe thunderstorm watch at May 13, 2000, 5:00 PM EDT for 29 counties in Pennsylvania. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: May 13, 2000, 5:00 PM EDT (21:00 UTC)
Expired: May 13, 2000, 10:00 PM EDT
In force: 5 hr
Issued by: the Storm Prediction Center

All 29 counties

Adams County, PA, Bedford County, PA, Blair County, PA, Bradford County, PA, Centre County, PA, Clinton County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Lackawanna County, PA, Lebanon County, PA, Luzerne County, PA, Lycoming County, PA, Mifflin County, PA, Montour County, PA, Northumberland County, PA, Perry County, PA, Schuylkill County, PA, Snyder County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga County, PA, Union County, PA, Wyoming County, PA, York County, PA

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
May 13, 5:08 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	67 min
May 13, 5:20 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	55 min
May 13, 5:22 PM EDT	Severe Thunderstorm Warning	CTP	Snyder	68 min
May 13, 5:28 PM EDT	Severe Thunderstorm Warning	CTP	Northumberland, Union	62 min
May 13, 5:35 PM EDT	Flash Flood Warning	BGM	Bradford	3 hr
May 13, 5:36 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin, Perry	54 min
May 13, 6:07 PM EDT	Severe Thunderstorm Warning	CTP	Adams	68 min
May 13, 6:20 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	55 min
May 13, 6:42 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon	63 min
May 13, 6:49 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	56 min
May 13, 7:13 PM EDT	Tornado Warning	CTP	York	32 min

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.0 hours before the alert went out and 188 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: 680 J/kg
Mixed-layer CIN: -169 J/kg
Mixed-layer LCL: 1644 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: -23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 13, 2:45 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Chester, Delaware, Lancaster, Philadelphia, York	5 hr
May 13, 6:00 PM EDT	Severe Thunderstorm Watch	SPC	Berks, Bucks, Carbon, Lackawanna, Lehigh, Monroe and 4 more	5 hr

Nearby

Severe Thunderstorm Watches in Pennsylvania, 2000 Every severe thunderstorm watch in 2000

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.