Alert archive / New Jersey / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 332, NWS Philadelphia/Mount Holly

August 7, 20194 counties in Pennsylvania; 5 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 7, 2019, 4:09 PM EDT for 4 counties in Pennsylvania; 5 counties in New Jersey. It was in force for 66 min. 11 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: Aug 7, 2019, 4:09 PM EDT (20:09 UTC)
Expired: Aug 7, 2019, 5:15 PM EDT
In force: 66 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Burlington County, NJ, Camden County, NJ, Mercer County, NJ, Middlesex County, NJ, Somerset County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 46 km from the middle of the area, began a volume at 20:10 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
Aug 7, 4:16 PM EDT	TSTM WND DMG	1 Ese Roxborough, PA	DOWNED TREE ON KELLY DRIVE. TIME ESTIMATED FROM RADAR.
Aug 7, 4:17 PM EDT	TSTM WND DMG	1 Ene Roxborough, PA	DOWNED TREES ON WEST RIVER DRIVE AND LINCOLN DRIVE. TIME ESTIMATED FROM RADAR.
Aug 7, 4:23 PM EDT	TSTM WND DMG	Princeton, NJ	REPORT OF DOWNED POWER LINES IN PRINCETON. TIME ESTIMATED FROM RADAR.
Aug 7, 4:24 PM EDT	TSTM WND DMG	Cheltenham, PA	SOCIAL MEDIA VIDEO OF LARGE TREE BLOWN DOWN DAMAGING PROPERTY AT A RESIDENCE. TIME ESTIMATED FROM RADAR.
Aug 7, 4:30 PM EDT	TSTM WND DMG	2 Ne Lawrenceville, NJ	DOWNED POWER LINES AT LAWRENCEVILLE ROAD AND PROVINCE LINE ROAD. TIME ESTIMATED FROM RADAR.
Aug 7, 4:38 PM EDT	TSTM WND DMG	Abington, PA	SEVERAL TREES AND POWER LINES DOWN IN THE AREA. TIME ESTIMATED FROM RADAR.
Aug 7, 4:45 PM EDT	TSTM WND DMG	2 Wsw Princeton, NJ	DOWNED TREE ON US-206 NORTHBOUND AT CR-533. ALSO SOME FLOODING ON THE ROADWAY. ALL LANES CLOSED AND DETOURED. TIME ESTIMATED FROM RADAR.
Aug 7, 4:49 PM EDT	TSTM WND DMG	Oreland, PA	DOWNED POWER LINES NEAR THE ORELAND STATION. TIME ESTIMATED FROM RADAR.
Aug 7, 4:52 PM EDT	TSTM WND DMG	1 Se Wynnewood, PA	DOWNED TREE BLOCKING VIOLET LANE NEAR PERIWINKLE ROAD. TIME ESTIMATED FROM RADAR.
Aug 7, 5:02 PM EDT	TSTM WND DMG	1 Nnw Springfield Twp, PA	DOWNED TREE AND POWER LINES ON HILLCREST ROAD. TIME ESTIMATED FROM RADAR.
Aug 7, 5:12 PM EDT	TSTM WND DMG	1 W Lower Moreland Twp, PA	DOWNED TREE BLOCKING WELSH ROAD NEAR INVERNESS LANE. TIME ESTIMATED FROM RADAR.

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
Aug 7, 2:10 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.2 hours before the alert went out and 172 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: 1372 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 652 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

As transmitted.

214 
WUUS51 KPHI 072009
SVRPHI
NJC005-007-021-023-035-PAC017-045-091-101-072115-
/O.NEW.KPHI.SV.W.0332.190807T2009Z-190807T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
409 PM EDT Wed Aug 7 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northwestern Camden County in southern New Jersey...
  Mercer County in central New Jersey...
  Northwestern Burlington County in southern New Jersey...
  Southeastern Somerset County in northern New Jersey...
  Southern Middlesex County in northern New Jersey...
  Southeastern Montgomery County in southeastern Pennsylvania...
  Southeastern Bucks County in southeastern Pennsylvania...
  Philadelphia County in southeastern Pennsylvania...
  Northeastern Delaware County in southeastern Pennsylvania...

* Until 515 PM EDT.

* At 409 PM EDT, severe thunderstorms were located along a line
  extending from Princeton to Roxborough, moving northeast at 20 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Philadelphia, Trenton, Camden, New Brunswick, Gloucester City,
  Somerset, Bensalem, East Brunswick, South Brunswick, Sayreville,
  North Brunswick, Ewing, Princeton, Yeadon, Burlington, Bristol,
  Riverside, Palmyra, Hatboro and Jenkintown.

This includes the following highways...
 Garden State Parkway between mile markers 125 and 126.
 Interstate 195 in New Jersey between mile markers 0 and 1.
 Interstate 295 in New Jersey between mile markers 60 and 76.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4049 7427 3990 7511 3995 7548 4053 7457
TIME...MOT...LOC 2009Z 245DEG 16KT 4037 7464 4001 7519 

HAIL...0.75IN
WIND...60MPH
 
$$

Staarmann

2 follow-up statements

039 
WWUS51 KPHI 072042
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
442 PM EDT Wed Aug 7 2019

NJC005-007-021-023-035-PAC017-045-091-101-072115-
/O.CON.KPHI.SV.W.0332.000000T0000Z-190807T2115Z/
Camden NJ-Mercer NJ-Burlington NJ-Somerset NJ-Middlesex NJ-
Montgomery PA-Bucks PA-Philadelphia PA-Delaware PA-
442 PM EDT Wed Aug 7 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHWESTERN CAMDEN...MERCER...NORTHWESTERN BURLINGTON...
SOUTHEASTERN SOMERSET...SOUTHERN MIDDLESEX...SOUTHEASTERN
MONTGOMERY...SOUTHEASTERN BUCKS...PHILADELPHIA AND NORTHEASTERN
DELAWARE COUNTIES...

At 442 PM EDT, severe thunderstorms with a history of prodcuing wind 
damage were located along a line extending from Dayton to near 
Burlington, moving east at 20 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Philadelphia, Trenton, Camden, New Brunswick, Gloucester City,
Somerset, Bensalem, East Brunswick, South Brunswick, Sayreville,
North Brunswick, Ewing, Princeton, Yeadon, Burlington, Bristol,
Riverside, Palmyra, Hatboro and Jenkintown.

This includes the following highways...
 Garden State Parkway between mile markers 125 and 126.
 Interstate 195 in New Jersey between mile markers 0 and 1.
 Interstate 295 in New Jersey between mile markers 60 and 76.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4049 7427 3990 7511 3995 7548 4053 7457
TIME...MOT...LOC 2042Z 250DEG 18KT 4037 7449 4009 7489 

HAIL...0.75IN
WIND...60MPH
 
$$

Staarmann

627 
WWUS51 KPHI 072055
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
455 PM EDT Wed Aug 7 2019

NJC005-007-072105-
/O.CAN.KPHI.SV.W.0332.000000T0000Z-190807T2115Z/
Camden NJ-Burlington NJ-
455 PM EDT Wed Aug 7 2019

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CAMDEN AND
NORTHWESTERN BURLINGTON COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A severe thunderstorm watch remains in effect until 900 PM EDT for
southern, central, northern and northwestern New Jersey...and
southeastern Pennsylvania.

LAT...LON 4012 7479 4013 7482 4008 7487 4005 7497
      3996 7513 3990 7513 3995 7548 4053 7457
      4049 7427
TIME...MOT...LOC 2055Z 237DEG 19KT 4043 7438 4032 7458 4011 7483 

$$

NJC021-023-035-PAC017-045-091-101-072115-
/O.CON.KPHI.SV.W.0332.000000T0000Z-190807T2115Z/
Mercer NJ-Somerset NJ-Middlesex NJ-Montgomery PA-Bucks PA-
Philadelphia PA-Delaware PA-
455 PM EDT Wed Aug 7 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR MERCER...SOUTHEASTERN SOMERSET...SOUTHERN MIDDLESEX...
SOUTHEASTERN MONTGOMERY...SOUTHEASTERN BUCKS...PHILADELPHIA AND
NORTHEASTERN DELAWARE COUNTIES...

At 455 PM EDT, severe thunderstorms with a history of producing wind 
damage were located along a line extending from East Brunswick to 
Princeton Meadows to Bristol, moving northeast at 20 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Philadelphia, Trenton, Camden, New Brunswick, Somerset, Bensalem,
East Brunswick, South Brunswick, Sayreville, North Brunswick, Ewing,
Princeton, Yeadon, Burlington, Bristol, Palmyra, Hatboro, Jenkintown,
Narberth and Cranbury.

This includes the following highways...
 Garden State Parkway between mile markers 125 and 126.
 Interstate 195 in New Jersey between mile markers 0 and 1.
 Interstate 295 in New Jersey between mile markers 60 and 76.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4012 7479 4013 7482 4008 7487 4005 7497
      3996 7513 3990 7513 3995 7548 4053 7457
      4049 7427
TIME...MOT...LOC 2055Z 237DEG 19KT 4043 7438 4032 7458 4011 7483 

HAIL...0.75IN
WIND...60MPH
 
$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 10:02 AM EDT	Flash Flood Watch	PHI	Bucks, Delaware, Montgomery, Philadelphia	11 hr
Aug 7, 1:02 PM EDT	Areal Flood Advisory	PHI	Bucks	4 hr
Aug 7, 1:22 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	38 min
Aug 7, 1:26 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	49 min
Aug 7, 1:46 PM EDT	Severe Thunderstorm Warning	PHI	Berks	44 min
Aug 7, 2:01 PM EDT	Areal Flood Advisory	PHI	Bucks	97 min
Aug 7, 2:59 PM EDT	Special Weather Statement	PHI	Bucks, Montgomery	31 min
Aug 7, 3:01 PM EDT	Areal Flood Advisory	PHI	Berks	2 hr
Aug 7, 3:02 PM EDT	Special Weather Statement	PHI	Berks, Lehigh	43 min
Aug 7, 3:18 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	42 min
Aug 7, 3:24 PM EDT	Flash Flood Warning	PHI	Berks	106 min
Aug 7, 3:24 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	51 min
Aug 7, 3:30 PM EDT	Special Weather Statement	PHI	Delaware, Montgomery	30 min
Aug 7, 3:31 PM EDT	Special Weather Statement	PHI	Philadelphia	44 min
Aug 7, 3:41 PM EDT	Areal Flood Advisory	PHI	Berks, Lehigh, Northampton	91 min
Aug 7, 3:54 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Northampton	51 min
Aug 7, 4:03 PM EDT	Special Weather Statement	PHI	Philadelphia	42 min
Aug 7, 4:06 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr
Aug 7, 4:14 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Monroe, Northampton	46 min
Aug 7, 4:20 PM EDT	Flash Flood Warning	PHI	Bucks, Montgomery, Philadelphia	4 hr
Aug 7, 4:27 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	63 min
Aug 7, 4:44 PM EDT	Flash Flood Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	3 hr
Aug 7, 5:16 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	59 min
Aug 7, 5:57 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	78 min
Aug 7, 6:01 PM EDT	Areal Flood Advisory	PHI	Bucks, Delaware, Philadelphia	3 hr
Aug 7, 6:10 PM EDT	River Flood Warning	PHI	Delaware	119 min
Aug 7, 7:42 PM EDT	Areal Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	3 hr
Aug 6, 8:05 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Warren	55 min
Aug 7, 12:55 PM EDT	Special Weather Statement	PHI	Hunterdon	35 min
Aug 7, 1:12 PM EDT	Special Weather Statement	PHI	Monmouth	33 min
Aug 7, 1:33 PM EDT	Special Marine Warning	PHI		42 min
Aug 7, 1:38 PM EDT	Severe Thunderstorm Warning	PHI	Cape May	52 min
Aug 7, 1:40 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Somerset	50 min
Aug 7, 1:44 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	46 min
Aug 7, 1:46 PM EDT	Flash Flood Warning	PHI	Hunterdon, Morris	4 hr
Aug 7, 1:50 PM EDT	Special Marine Warning	PHI		55 min
Aug 7, 1:52 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset	55 min
Aug 7, 2:03 PM EDT	Special Marine Warning	PHI		34 min
Aug 7, 2:07 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth	38 min
Aug 7, 2:16 PM EDT	Special Weather Statement	PHI	Cape May	29 min
Aug 7, 2:18 PM EDT	Areal Flood Advisory	PHI	Morris, Somerset	3 hr
Aug 7, 2:21 PM EDT	Special Marine Warning	PHI		23 min
Aug 7, 2:23 PM EDT	Severe Thunderstorm Warning	PHI	Cape May	19 min
Aug 7, 2:27 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	32 min
Aug 7, 2:30 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	45 min
Aug 7, 2:57 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth, Somerset	3 hr
Aug 7, 3:05 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden	40 min
Aug 7, 3:07 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	53 min
Aug 7, 3:38 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Ocean	67 min
Aug 7, 3:42 PM EDT	Special Weather Statement	PHI	Middlesex	33 min
Aug 7, 3:49 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth	3 hr
Aug 7, 3:59 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	46 min
Aug 7, 4:03 PM EDT	Flash Flood Warning	PHI	Middlesex, Monmouth	4 hr
Aug 7, 4:34 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth	41 min
Aug 7, 4:39 PM EDT	Flash Flood Warning	PHI	Mercer, Middlesex, Somerset	6 hr
Aug 7, 5:02 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth, Morris, Somerset	22 min
Aug 7, 5:03 PM EDT	Special Marine Warning	PHI		42 min
Aug 7, 5:34 PM EDT	Special Marine Warning	PHI		56 min
Aug 7, 5:39 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Cumberland, Gloucester, Salem	51 min
Aug 7, 5:41 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	49 min
Aug 7, 6:21 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	69 min
Aug 7, 6:27 PM EDT	Special Marine Warning	PHI		63 min
Aug 7, 6:56 PM EDT	Special Marine Warning	PHI		2 hr
Aug 7, 7:09 PM EDT	Special Marine Warning	PHI		2 hr
Aug 7, 7:15 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Monmouth, Ocean	75 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.