Alert archive / Pennsylvania / Tornado Watches in 2019

Tornado Watch 274

May 28, 201910 counties in New Jersey; 64 counties in Pennsylvania; Brooke County, Hancock County, West Virginia

The Storm Prediction Center issued this tornado watch at May 28, 2019, 1:48 PM EDT for 10 counties in New Jersey; 64 counties in Pennsylvania; Brooke County, Hancock County, West Virginia. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: May 28, 2019, 1:48 PM EDT (17:48 UTC)
Expired: May 28, 2019, 10:00 PM EDT
In force: 8 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 76 counties

Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Salem County, NJ, Warren County, NJ, Adams County, PA, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Bedford County, PA, Berks County, PA, Blair County, PA, Bradford County, PA, Bucks County, PA, Butler County, PA, Cambria County, PA, Cameron County, PA, Carbon County, PA, Centre County, PA, Chester County, PA, Clarion County, PA, Clearfield County, PA, Clinton County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Delaware County, PA, Elk County, PA, Fayette County, PA, Forest County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Indiana County, PA, Jefferson County, PA, Juniata County, PA, Lackawanna County, PA, Lancaster County, PA, Lawrence County, PA, Lebanon County, PA, Lehigh County, PA, Luzerne County, PA, Lycoming County, PA, McKean County, PA, Mercer 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, Somerset County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga County, PA, Union County, PA, Venango County, PA, Warren County, PA, Washington County, PA, Wayne County, PA, Westmoreland County, PA, Wyoming County, PA, York County, PA, Brooke County, WV, Hancock County, WV

The radar

The State College radar (KCCX), 30 km from the middle of the area, began a volume at 17:52 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 50%
One or more EF2 to EF5 tornadoes: 20%
Ten or more severe wind reports: 60%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 60%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
May 28, 2:15 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer, Venango	45 min
May 28, 2:28 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Lawrence	47 min
May 28, 2:41 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Potter, Tioga	34 min
May 28, 2:54 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Venango	51 min
May 28, 2:59 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Potter	46 min
May 28, 2:59 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana	46 min
May 28, 3:01 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler	44 min
May 28, 3:18 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Clearfield, Huntingdon	57 min
May 28, 3:21 PM EDT	Tornado Warning	PBZ	Armstrong, Indiana	24 min
May 28, 3:23 PM EDT	Tornado Warning	CTP	Clinton, Lycoming	27 min
May 28, 3:28 PM EDT	Severe Thunderstorm Warning	CTP	Northumberland, Snyder, Union	62 min
May 28, 3:30 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Indiana, Jefferson	30 min
May 28, 3:35 PM EDT	Tornado Warning	CTP	Northumberland, Snyder, Union	25 min
May 28, 3:36 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Butler, Lawrence	39 min
May 28, 3:40 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria	65 min
May 28, 3:41 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Mercer, Venango	49 min
May 28, 3:43 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Venango	47 min
May 28, 3:43 PM EDT	Tornado Warning	PBZ	Indiana	32 min
May 28, 3:47 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Northumberland, Union	43 min
May 28, 3:50 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana	40 min
May 28, 3:58 PM EDT	Tornado Warning	CTP	Northumberland, Schuylkill	32 min
May 28, 4:08 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Northumberland, Snyder, Union	52 min
May 28, 4:22 PM EDT	Tornado Warning	CTP	Schuylkill	23 min
May 28, 4:27 PM EDT	Severe Thunderstorm Warning	CTP	Huntingdon	33 min
May 28, 4:27 PM EDT	Severe Thunderstorm Warning	PHI	Berks	63 min
May 28, 4:28 PM EDT	Severe Thunderstorm Warning	CTP	Montour, Northumberland, Union	32 min
May 28, 4:28 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Indiana, Jefferson	47 min
May 28, 4:32 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Lawrence, Mercer	43 min
May 28, 4:36 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Jefferson	39 min
May 28, 4:37 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana	19 min
May 28, 4:41 PM EDT	Severe Thunderstorm Warning	CTP	Clinton	34 min
May 28, 4:42 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna, Wyoming	48 min
May 28, 4:45 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair	60 min
May 28, 4:45 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana, Westmoreland	45 min
May 28, 4:49 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Mifflin	31 min
May 28, 4:50 PM EDT	Severe Thunderstorm Warning	CTP	Cambria	55 min
May 28, 4:54 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Dauphin, Northumberland, Schuylkill, Snyder	51 min
May 28, 4:57 PM EDT	Tornado Warning	BGM	Bradford, Susquehanna, Wyoming	33 min
May 28, 4:59 PM EDT	Severe Thunderstorm Warning	CTP	Lebanon	29 min
May 28, 5:00 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Northumberland, Union	45 min
May 28, 5:04 PM EDT	Severe Thunderstorm Warning	CTP	Snyder, Union	26 min
May 28, 5:08 PM EDT	Severe Thunderstorm Warning	PHI	Berks	67 min
May 28, 5:12 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Butler, Lawrence	33 min
May 28, 5:19 PM EDT	Tornado Warning	BGM	Bradford, Susquehanna, Wyoming	26 min
May 28, 5:19 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana	41 min
May 28, 5:20 PM EDT	Tornado Warning	CTP	Blair, Cambria	40 min
May 28, 5:22 PM EDT	Tornado Warning	PHI	Berks	23 min
May 28, 5:25 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland, Union	50 min
May 28, 5:26 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	34 min
May 28, 5:26 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon	49 min
May 28, 5:28 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Jefferson	32 min
May 28, 5:29 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Beaver, Butler, Indiana, Westmoreland	46 min
May 28, 5:36 PM EDT	Severe Thunderstorm Warning	PHI	Berks	39 min
May 28, 5:37 PM EDT	Tornado Warning	BGM	Wayne	23 min
May 28, 5:38 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Lackawanna, Luzerne, Susquehanna, Wyoming	37 min
May 28, 5:42 PM EDT	Tornado Warning	BGM	Bradford, Lackawanna, Wyoming	33 min
May 28, 5:45 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	45 min
May 28, 5:49 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria	56 min
May 28, 5:56 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Luzerne, Wyoming	64 min
May 28, 5:58 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	32 min
May 28, 6:03 PM EDT	Flash Flood Warning	PBZ	Beaver, Butler, Lawrence	5 hr
May 28, 6:05 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Schuylkill	40 min
May 28, 6:08 PM EDT	Tornado Warning	BGM	Lackawanna, Luzerne, Wyoming	22 min
May 28, 6:09 PM EDT	Tornado Warning	PHI	Chester	36 min
May 28, 6:11 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	64 min
May 28, 6:12 PM EDT	Severe Thunderstorm Warning	CTP	Sullivan	48 min
May 28, 6:15 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Butler, Indiana, Westmoreland	45 min
May 28, 6:16 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery	44 min
May 28, 6:18 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Susquehanna, Wayne, Wyoming	57 min
May 28, 6:19 PM EDT	Tornado Warning	BGM	Bradford, Wyoming	41 min
May 28, 6:24 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Delaware	48 min
May 28, 6:25 PM EDT	Tornado Warning Tornado observedConsiderable damage threat	BGM	Lackawanna, Pike, Wayne	50 min
May 28, 6:28 PM EDT	Severe Thunderstorm Warning	CTP	Franklin, Huntingdon	25 min
May 28, 6:31 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	13 min
May 28, 6:32 PM EDT	Flash Flood Warning	PBZ	Allegheny, Armstrong, Butler, Indiana, Westmoreland	5 hr
May 28, 6:41 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	64 min
May 28, 6:48 PM EDT	Flash Flood Warning	BGM	Lackawanna	3 hr
May 28, 6:52 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester, Salem	38 min
May 28, 6:58 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Wyoming	62 min
May 28, 6:59 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cumberland, Gloucester, Salem	61 min
May 28, 7:04 PM EDT	Severe Thunderstorm Warning	BGM	Pike	41 min
May 28, 7:07 PM EDT	Flash Flood Warning	PBZ	Lawrence	3 hr
May 28, 7:20 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	40 min
May 28, 7:33 PM EDT	Tornado Warning	BGM	Lackawanna, Pike, Wayne	23 min
May 28, 7:39 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	66 min
May 28, 7:42 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	63 min
May 28, 7:53 PM EDT	Severe Thunderstorm Warning	PHI	Cape May, Cumberland, Salem	52 min
May 28, 7:53 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Butler, Lawrence	37 min
May 28, 7:59 PM EDT	Tornado Warning	PHI	Cumberland	31 min
May 28, 8:23 PM EDT	Tornado Warning	PHI	Warren	37 min
May 28, 8:35 PM EDT	Severe Thunderstorm Warning	PHI	Cape May, Cumberland	55 min
May 28, 8:37 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	25 min
May 28, 8:44 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Somerset, Sussex, Warren	61 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

Pittsburgh, PA (KAGC), launched 12:00Z, 5.8 hours before the alert went out and 183 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: 450 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 910 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 498 m²/s²
0-3 km storm-relative helicity: 483 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.4

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 28, 1:02 PM EDT	Mesoscale Discussion	SPC	Burlington, Camden, Cumberland, Essex, Gloucester, Hunterdon and 8 more	118 min
May 28, 4:43 PM EDT	Mesoscale Discussion	SPC	Burlington, Camden, Gloucester, Hunterdon, Mercer, Morris and 3 more	2 hr
May 28, 5:34 PM EDT	Mesoscale Discussion	SPC	Atlantic, Cape May, Cumberland, Salem	86 min
May 28, 6:08 PM EDT	Mesoscale Discussion	SPC	Bergen, Passaic, Sussex	97 min
May 28, 1:22 PM EDT	Severe Thunderstorm Watch	SPC	Crawford, Erie	7 hr
May 28, 3:24 PM EDT	Mesoscale Discussion	SPC	Crawford, Lawrence, Mercer	2 hr
May 28, 12:08 AM EDT	Tornado Watch	SPC	Calhoun, Jackson, Pleasants, Ritchie, Roane, Tyler and 2 more	4 hr
May 28, 2:03 AM EDT	Mesoscale Discussion	SPC	Pleasants, Ritchie, Tyler, Wirt, Wood	117 min

Nearby

Tornado Watches in Pennsylvania, 2019 Tornado Watches in New Jersey, 2019 Tornado Watches in West Virginia, 2019 Every tornado watch in 2019

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.