Alert archive / New Jersey / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 93, NWS Philadelphia/Mount Holly

May 29, 2019Hunterdon County, Mercer County, New Jersey; Bucks County, Montgomery County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 29, 2019, 4:53 PM EDT for Hunterdon County, Mercer County, New Jersey; Bucks County, Montgomery County, Pennsylvania. It was in force for 67 min. 26 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 29, 2019, 4:53 PM EDT (20:53 UTC)
Expired: May 29, 2019, 6:00 PM EDT
In force: 67 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 2.0 in
Wind: 70.0 mph

Counties Hunterdon County, NJ, Mercer County, NJ, Bucks County, PA, Montgomery County, PA

The radar

The Philadelphia radar (KDIX), 79 km from the middle of the area, began a volume at 20:53 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 was reported inside it

Time	Report	Where	Remark
May 29, 4:55 PM EDT	TSTM WND DMG	1 Se Green Lane, PA	NUMEROUS TREES DOWN. TIME ESTIMATED FROM RADAR.
May 29, 4:55 PM EDT	TSTM WND DMG	3 W Lower Frederick Twp, PA	NEIFFER RD CLOSED FROM RTE 73 TO RIDGE PIKE DUE TO DOWNED TREES. TIME ESTIMATED FROM RADAR.
May 29, 4:55 PM EDT	TSTM WND DMG	Green Lane, PA	REPORT OF TREES DOWN. TIME ESTIMATED FROM RADAR.
May 29, 4:55 PM EDT	TSTM WND DMG	Perkiomenville, PA	MULTIPLE REPORTS OF SEVERAL TREES UPROOTED OR SNAPPED. TIME ESTIMATED FROM RADAR.
May 29, 4:55 PM EDT	TSTM WND DMG	Perkiomenville, PA	SEVERAL TREES AND POWER LINES DOWN. TIME ESTIMATED FROM RADAR.
May 29, 4:56 PM EDT	TSTM WND GST 55	1 N Green Lane, PA
May 29, 4:56 PM EDT	HAIL 1	Green Lane, PA
May 29, 5:00 PM EDT	TSTM WND DMG	Upper Salford Twp, PA	TREES DOWN IN WOXALL/UPPER SALFORD TWP.
May 29, 5:15 PM EDT	TSTM WND DMG	Doylestown, PA	TREES AND POWER LINES REPORTED DOWN.
May 29, 5:15 PM EDT	HAIL 0.75	Telford, PA
May 29, 5:30 PM EDT	TSTM WND DMG	2 Wsw Hopewell, NJ	DOWNED TREE AND WIRES ON NJ-31 IN BOTH DIRECTIONS NORTH OF CR-612. ALL LANES CLOSED. TIME ESTIMATED FROM RADAR.
May 29, 5:35 PM EDT	TSTM WND DMG	1 Sse Newtown, PA	MANY LARGE TREE BRANCHES (6 IN DIAMETER) BROKEN. TIME ESTIMATED FROM RADAR.
May 29, 5:35 PM EDT	TSTM WND DMG	2 Sse Marlborough Twp, PA	PHOTO OF A LARGE TREE SNAPPED NEAR THE BASE.
May 29, 5:38 PM EDT	TSTM WND DMG	Harleysville, PA	MULTIPLE TREES REPORTED DOWN AT THE LANDIS PARKING LOT IN HARLEYSVILLE. TIME ESTIMATED FROM RADAR.
May 29, 5:42 PM EDT	TSTM WND DMG	Vernfield, PA	TREES SNAPPED AND SOME UPROOTED, SHINGLES TORN OFF, BARN ABOUT 1/2 MILE AWAY WAS BLOWN DOWN. ALSO REPORTED HAIL THE SIZE OF NICKELS. TIME ESTIMATED FROM RADAR.
May 29, 5:45 PM EDT	TSTM WND DMG	Sellersville, PA	MULTIPLE TREES DOWN WITH POWER OUTAGES. TIME ESTIMATED FROM RADAR.
May 29, 5:50 PM EDT	TSTM WND DMG	Lower Frederick Twp, PA	HOME REPORTED DAMAGED ON WALNUT LN WITH RESIDENT NEEDING ASSISTANCE TO BE EXTRACTED. TIME ESTIMATED FROM RADAR.
May 29, 5:50 PM EDT	HAIL 1	Richland Twp, PA
May 29, 6:00 PM EDT	HAIL 0.88	2 S Horsham Twp, PA
May 29, 6:00 PM EDT	HAIL 0.88	Hatboro, PA
May 29, 6:02 PM EDT	HAIL 0.7	1 Wsw Horsham, PA
May 29, 6:05 PM EDT	HAIL 0.75	Warminster Twp, PA
May 29, 6:05 PM EDT	HAIL 1	Bensalem, PA
May 29, 6:10 PM EDT	TSTM WND GST 70	1 E Newtown, PA	TIME ESTIMATED FROM RADAR.
May 29, 6:10 PM EDT	HAIL 1	2 N Lower Moreland Twp, PA
May 29, 6:10 PM EDT	HAIL 1	2 Sse Warminster Twp, PA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 29, 1:10 PM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.9 hours before the alert went out and 205 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 415 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: -157 m²/s²
0-3 km storm-relative helicity: -76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

656 
WUUS51 KPHI 292053
SVRPHI
NJC019-021-PAC017-091-292200-
/O.NEW.KPHI.SV.W.0093.190529T2053Z-190529T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
453 PM EDT Wed May 29 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southern Hunterdon County in northwestern New Jersey...
  Northwestern Mercer County in central New Jersey...
  Central Montgomery County in southeastern Pennsylvania...
  Bucks County in southeastern Pennsylvania...

* Until 600 PM EDT.

* At 452 PM EDT, a severe thunderstorm was located near Green Lane,
  or 18 miles south of Allentown, moving east at 35 mph.

  HAZARD...Two inch hail and 70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           considerable tree damage. Wind damage is also likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Trenton, Ewing, Pottstown, Lansdale, Burlington, Bristol,
  Quakertown, Perkasie, Doylestown, Byram, Hatboro, Souderton,
  Bedminster, Chalfont, Tinicum, Hatfield, East Greenville,
  Pennington, New Hope and Yardley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect until 800 PM EDT for southern,
central and northwestern New Jersey...and eastern and southeastern
Pennsylvania.

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted, act quickly and move to a
place of safety inside a sturdy structure such as a basement or small
interior room.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4044 7552 4042 7549 4051 7538 4059 7525
      4048 7478 4042 7475 4009 7485 4012 7498
      4014 7501 4013 7503 4026 7568
TIME...MOT...LOC 2052Z 278DEG 29KT 4032 7553 

HAIL...2.00IN
WIND...70MPH
 
$$

Iovino

1 follow-up statement

982 
WWUS51 KPHI 292121
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
521 PM EDT Wed May 29 2019

NJC019-021-PAC017-091-292200-
/O.CON.KPHI.SV.W.0093.000000T0000Z-190529T2200Z/
Hunterdon NJ-Mercer NJ-Montgomery PA-Bucks PA-
521 PM EDT Wed May 29 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTHEASTERN HUNTERDON...NORTHWESTERN MERCER...EAST CENTRAL
MONTGOMERY AND BUCKS COUNTIES...

At 521 PM EDT, a severe thunderstorm was located over Chalfont, or 19
miles north of Philadelphia, moving east at 35 mph.

HAZARD...Two inch hail and 70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

Locations impacted include...
Trenton, Ewing, Lansdale, Burlington, Bristol, Doylestown, Byram,
Hatboro, Souderton, Bedminster, Flemington, Chalfont, Tinicum,
Hatfield, Pennington, New Hope, Yardley, Newtown, Dublin and
Hopewell.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect until 800 PM EDT for southern,
central and northwestern New Jersey...and southeastern Pennsylvania.

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4036 7528 4055 7506 4048 7478 4042 7475
      4009 7485 4012 7498 4014 7501 4013 7503
      4021 7541
TIME...MOT...LOC 2121Z 278DEG 29KT 4029 7523 

HAIL...2.00IN
WIND...70MPH
 
$$

Iovino

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 28, 8:23 PM EDT	Tornado Warning	PHI	Warren	37 min
May 28, 8:30 PM EDT	Tornado Warning	PHI	Morris, Sussex	30 min
May 28, 8:34 PM EDT	Special Marine Warning	PHI		41 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
May 28, 8:50 PM EDT	Areal Flood Advisory	PHI	Cape May	78 min
May 28, 8:59 PM EDT	Special Marine Warning	PHI		61 min
May 28, 9:33 PM EDT	Areal Flood Advisory	PHI	Morris, Somerset	63 min
May 28, 9:47 PM EDT	Special Marine Warning	PHI		43 min
May 28, 9:52 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	23 min
May 28, 9:57 PM EDT	Special Marine Warning	PHI		44 min
May 28, 10:03 PM EDT	Special Weather Statement	PHI	Atlantic	12 min
May 28, 10:28 PM EDT	Special Marine Warning	PHI		58 min
May 28, 10:30 PM EDT	Special Weather Statement	PHI	Ocean	45 min
May 28, 10:33 PM EDT	Special Weather Statement	PHI	Burlington	27 min
May 28, 10:34 PM EDT	Special Weather Statement	PHI	Monmouth	26 min
May 28, 11:00 PM EDT	Special Weather Statement	PHI	Burlington, Ocean	30 min
May 28, 11:07 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	38 min
May 28, 11:21 PM EDT	Special Marine Warning	PHI		39 min
May 28, 11:35 PM EDT	Severe Thunderstorm Warning	PHI	Ocean	25 min
May 28, 11:57 PM EDT	Special Marine Warning	PHI		48 min
May 29, 3:18 AM EDT	Flash Flood Watch	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 7 more	18 hr
May 29, 3:10 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	65 min
May 29, 3:38 PM EDT	Tornado Warning	PHI	Hunterdon	37 min
May 29, 3:43 PM EDT	Flash Flood Warning	PHI	Sussex, Warren	4 hr
May 29, 3:43 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	47 min
May 29, 4:04 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Somerset	41 min
May 29, 4:09 PM EDT	Severe Thunderstorm Warning	PHI	Warren	51 min
May 29, 4:13 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	47 min
May 29, 4:16 PM EDT	Severe Thunderstorm Warning	PHI	Warren	27 min
May 29, 4:27 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Sussex, Warren	51 min
May 29, 4:28 PM EDT	Special Weather Statement	PHI	Morris	32 min
May 29, 4:35 PM EDT	Special Weather Statement	PHI	Sussex	25 min
May 29, 4:37 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth, Ocean	53 min
May 29, 5:01 PM EDT	Special Weather Statement	PHI	Hunterdon, Morris	29 min
May 29, 5:03 PM EDT	Special Marine Warning	PHI		57 min
May 29, 5:14 PM EDT	Flash Flood Warning	PHI	Hunterdon, Morris, Sussex, Warren	3 hr
May 29, 5:23 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Sussex, Warren	34 min
May 29, 5:27 PM EDT	Flash Flood Warning	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset	4 hr
May 29, 5:33 PM EDT	Tornado Warning	PHI	Burlington, Mercer, Monmouth	27 min
May 29, 5:39 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Ocean and 1 more	66 min
May 29, 5:45 PM EDT	Special Weather Statement	PHI	Hunterdon, Morris, Sussex, Warren	30 min
May 29, 6:01 PM EDT	Special Marine Warning	PHI		59 min
May 29, 6:02 PM EDT	Special Weather Statement	PHI	Salem	28 min
May 29, 6:06 PM EDT	Flash Flood Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	4 hr
May 29, 6:06 PM EDT	Severe Thunderstorm Warning	PHI	Burlington	24 min
May 29, 6:29 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Ocean	61 min
May 29, 6:35 PM EDT	Flash Flood Warning	PHI	Burlington, Camden, Gloucester, Ocean	3 hr
May 29, 6:35 PM EDT	Special Marine Warning	PHI		55 min
May 29, 7:08 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden, Cumberland, Gloucester, Salem	52 min
May 29, 7:12 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Ocean and 1 more	3 hr
May 29, 7:15 PM EDT	Special Marine Warning	PHI		60 min
May 29, 7:25 PM EDT	Special Marine Warning	PHI		65 min
May 29, 7:33 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Cape May, Cumberland, Ocean	42 min
May 29, 7:35 PM EDT	Special Marine Warning	PHI		85 min
May 28, 9:17 PM EDT	River Flood Warning	PHI	Chester	101 min
May 29, 2:19 PM EDT	Special Weather Statement	PHI	Lehigh	41 min
May 29, 2:26 PM EDT	Special Weather Statement	PHI	Montgomery	34 min
May 29, 2:30 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	60 min
May 29, 2:48 PM EDT	Special Weather Statement	PHI	Monroe	27 min
May 29, 2:59 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	46 min
May 29, 3:17 PM EDT	Tornado Warning	PHI	Bucks, Lehigh	28 min
May 29, 3:29 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe, Northampton	46 min
May 29, 3:29 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	46 min
May 29, 3:43 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	62 min
May 29, 4:18 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	42 min
May 29, 4:42 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	48 min
May 29, 4:50 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Chester, Lehigh, Montgomery, Northampton	40 min
May 29, 4:55 PM EDT	Flash Flood Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery	4 hr
May 29, 5:08 PM EDT	Tornado Warning	PHI	Bucks, Montgomery	27 min
May 29, 5:49 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Delaware, Montgomery, Philadelphia	41 min
May 29, 6:22 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	53 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2019 Severe Thunderstorm Warnings in Pennsylvania, 2019 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.