Alert archive / Pennsylvania / Tornado Warnings in 2021

Tornado Warning 25, NWS Philadelphia/Mount Holly

July 29, 2021Bucks County, Philadelphia County, Pennsylvania; Burlington County, New Jersey

NWS Philadelphia/Mount Holly issued this tornado warning at Jul 29, 2021, 7:07 PM EDT for Bucks County, Philadelphia County, Pennsylvania; Burlington County, New Jersey. It was in force for 23 min. 15 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: Jul 29, 2021, 7:07 PM EDT (23:07 UTC)
Expired: Jul 29, 2021, 7:30 PM EDT
In force: 23 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Burlington County, NJ, Bucks County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 44 km from the middle of the area, began a volume at 23:09 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
Jul 29, 7:07 PM EDT	TSTM WND DMG	1 Wnw Feasterville-Trev, PA	FAULKNER AUTO BUILDING ROOF WAS BLOWN OFF AND COLLAPSED. MULTIPLE SECTIONS OF THE EXTERIOR WALLS ALSO APPEAR TO BE COLLAPSED. PROBABLE TORNADO. TIME ESTIMATED RADAR.
Jul 29, 7:07 PM EDT	TSTM WND DMG	Feasterville-Trevose, PA	REPORTS OF DAMAGE TO THE LOWES OUTDOOR GARDEN CENTER JUST WEST OF NESHAMINY MALL. MULTIPLE TREES DOWN AS WELL AS WINDOWS BLOWN OUT OF VEHICLES. POSSIBLE TORNADO. TIME ESTIMATED FROM RADAR.
Jul 29, 7:07 PM EDT	TORNADO	1 Sw Northeast Philadel, PA	A BRIEF TORNADO OCCURRED IN THE BUSTLETON SECTION OF NORTHEAST PHILADELPHIA. DAMAGE WAS FIRST OBSERVED NEAR GRANT AVE AT THE GRANT GARDENS APARTMENT COMPLEX, WHERE SOME MINOR LOSS OF ROOFING MATERIAL WAS NOTED AND DEBRIS WAS TOSSED IN A CHAOTIC MANNER CONSISTE
Jul 29, 7:10 PM EDT	TSTM WND DMG	1 N Burlington Twp, NJ	TREES AND WIRES DOWN ALONG NECK ROAD.
Jul 29, 7:10 PM EDT	TSTM WND DMG	1 Wnw Feasterville-Trev, PA	BUILDING DAMAGE AND TREES DOWN IN BENSALEM TOWNSHIP NEAR STREET ROAD AND THE TURNPIKE.
Jul 29, 7:10 PM EDT	TORNADO	1 Ne Feasterville-Trevo, PA	DEBRIS IN THE AIR AT THE NESHAMINY MALL IN BENSALEM TOWNSHIP.
Jul 29, 7:19 PM EDT	TSTM WND DMG	1 Wnw Rancocas, NJ	TREE BLOWN DOWN, AND LARGE BRANCHES BLOWN DOWN FROM OTHER TREES. TIME ESTIMATED FROM RADAR.
Jul 29, 7:19 PM EDT	HAIL 1	Edgewater Park, NJ
Jul 29, 7:19 PM EDT	HAIL 1.5	Willingboro, NJ	PICTURE SHARED ON SOCIAL MEDIA OF 1.5 INCH HAIL IN WILLINGBORO. TIME ESTIMATED FROM RADAR.
Jul 29, 7:24 PM EDT	TSTM WND DMG	Bensalem, PA	TWITTER VIDEO OF DEBRIS RAINING DOWN NEAR BENSALEM, PA. TIME ESTIMATED FROM RADAR.
Jul 29, 7:26 PM EDT	HAIL 1	Mount Holly Wfo, NJ
Jul 29, 7:27 PM EDT	HAIL 1.5	Hainesport, NJ	MEASURED 1.5 INCH HAIL.
Jul 29, 7:29 PM EDT	HAIL 1.25	Mount Holly Wfo, NJ
Jul 29, 7:30 PM EDT	TSTM WND DMG	1 Ne Rancocas, NJ	METAL BLEACHERS DISPLACED, FENCE AND SIGN BLOWN DOWN, SOME SHINGLES BLOWN OFF. TIME ESTIMATED FROM RADAR.
Jul 29, 7:35 PM EDT	TSTM WND DMG	1 Sse Mount Holly Wfo, NJ	LARGE TREE UPROOTED.

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
Jul 29, 2:23 PM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 11.1 hours before the alert went out and 190 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: 54 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 823 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

243 
WFUS51 KPHI 292307
TORPHI
NJC005-PAC017-101-292330-
/O.NEW.KPHI.TO.W.0025.210729T2307Z-210729T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
707 PM EDT Thu Jul 29 2021

The National Weather Service in Mount Holly NJ has issued a

* Tornado Warning for...
  Northwestern Burlington County in southern New Jersey...
  Southeastern Bucks County in southeastern Pennsylvania...
  Northeastern Philadelphia County in southeastern Pennsylvania...

* Until 730 PM EDT.
    
* At 706 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Feasterville-Trevose, or 11 miles northeast of
  Philadelphia, moving east at 25 mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations impacted include...
  Philadelphia, Bensalem, Willingboro, Florence, Burlington, Bristol,
  Riverside, Bordentown, Beverly, Tullytown, Langhorne,
  Feasterville-Trevose, Florence-Roebling, Northeast Philadelphia,
  Feasterville, Jacksonville, Andalusia, Langhorn, Levittown and
  Edgewater Park.

This includes the following highways...
 New Jersey Turnpike between exits 5 and 6A.
 Pennsylvania Turnpike between mile markers 349 and 359.
 Interstate 95 in Pennsylvania between mile markers 31 and 40.
 Interstate 295 in New Jersey between mile markers 43 and 57.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3996 7483 4007 7509 4010 7507 4013 7502
      4015 7503 4020 7498 4017 7473 4015 7472
      4016 7471 4016 7468
TIME...MOT...LOC 2306Z 282DEG 23KT 4013 7498 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Staarmann

2 follow-up statements

555 
WWUS51 KPHI 292315
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
715 PM EDT Thu Jul 29 2021

NJC005-PAC017-101-292330-
/O.CON.KPHI.TO.W.0025.000000T0000Z-210729T2330Z/
Burlington NJ-Bucks PA-Philadelphia PA-
715 PM EDT Thu Jul 29 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR
NORTHWESTERN BURLINGTON...SOUTHEASTERN BUCKS AND NORTHEASTERN
PHILADELPHIA COUNTIES...
    
At 715 PM EDT, a confirmed tornado was located over Bensalem, or 10
miles southwest of Trenton, moving east at 25 mph.

HAZARD...Damaging tornado and ping pong ball size hail.

SOURCE...Weather spotters confirmed tornado.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Philadelphia, Bensalem, Willingboro, Florence, Burlington, Bristol,
Riverside, Bordentown, Beverly, Tullytown, Langhorne,
Florence-Roebling, Jacksonville, Andalusia, Langhorn, Levittown,
Holmesburg, Feasterville-Trevose, Edgewater Park and Delanco.

This includes the following highways...
 New Jersey Turnpike between exits 5 and 6A.
 Pennsylvania Turnpike between mile markers 351 and 359.
 Interstate 95 in Pennsylvania between mile markers 31 and 40.
 Interstate 295 in New Jersey between mile markers 43 and 57.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado has been confirmed. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors or in a vehicle, move to
the closest substantial shelter and protect yourself from flying
debris.

&&

LAT...LON 4006 7507 4011 7498 4014 7499 4019 7493
      4017 7473 4015 7472 4016 7471 4016 7468
      3996 7483
TIME...MOT...LOC 2315Z 281DEG 22KT 4012 7492 

TORNADO...OBSERVED
HAIL...1.50IN

$$

Staarmann

515 
WWUS51 KPHI 292323
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
723 PM EDT Thu Jul 29 2021

PAC101-292333-
/O.CAN.KPHI.TO.W.0025.000000T0000Z-210729T2330Z/
Philadelphia PA-
723 PM EDT Thu Jul 29 2021

...THE TORNADO WARNING FOR NORTHEASTERN PHILADELPHIA COUNTY IS
CANCELLED...
    
The tornadic thunderstorm which prompted the warning has weakened 
moved out of the warned area. Therefore, the warning has been 
cancelled.

A Tornado Watch remains in effect until 900 PM EDT for southern and
central New Jersey...and southeastern Pennsylvania.

LAT...LON 3996 7483 4002 7499 4003 7500 4010 7491
      4018 7490 4017 7473 4015 7472 4016 7471
      4016 7468
TIME...MOT...LOC 2323Z 291DEG 24KT 4005 7485 

$$

NJC005-PAC017-292330-
/O.CON.KPHI.TO.W.0025.000000T0000Z-210729T2330Z/
Burlington NJ-Bucks PA-
723 PM EDT Thu Jul 29 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR
NORTHWESTERN BURLINGTON AND SOUTHEASTERN BUCKS COUNTIES...
    
At 723 PM EDT, a confirmed tornado was located over Burlington, or 12
miles south of Trenton, moving east at 30 mph.

HAZARD...Damaging tornado and ping pong ball size hail.

SOURCE...Weather spotters confirmed tornado.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Willingboro, Florence, Burlington, Bristol, Riverside, Bordentown,
Beverly, Tullytown, Florence-Roebling, Levittown, Jacksonville,
Edgewater Park, Delanco, Hulmeville, Fieldsboro, Nws Office, Croydon
and Fairless Hills.

This includes the following highways...
 New Jersey Turnpike between exits 5 and 6A.
 Pennsylvania Turnpike between mile markers 355 and 359.
 Interstate 95 in Pennsylvania between mile markers 39 and 40.
 Interstate 295 in New Jersey between mile markers 43 and 57.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado has been confirmed. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors or in a vehicle, move to
the closest substantial shelter and protect yourself from flying
debris.

&&

LAT...LON 3996 7483 4002 7499 4003 7500 4010 7491
      4018 7490 4017 7473 4015 7472 4016 7471
      4016 7468
TIME...MOT...LOC 2323Z 291DEG 24KT 4005 7485 

TORNADO...OBSERVED
HAIL...1.50IN

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 3:48 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh, Northampton	42 min
Jul 29, 4:03 PM EDT	Tornado Warning	PHI	Berks, Lehigh, Northampton	27 min
Jul 29, 4:27 PM EDT	Tornado Warning	PHI	Lehigh, Northampton	16 min
Jul 29, 4:30 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Carbon, Lehigh, Monroe, Northampton	45 min
Jul 29, 4:46 PM EDT	Areal Flood Advisory	PHI	Berks, Lehigh, Northampton	3 hr
Jul 29, 4:56 PM EDT	Tornado Warning	PHI	Bucks, Lehigh, Northampton	34 min
Jul 29, 4:57 PM EDT	Areal Flood Advisory	PHI	Bucks, Monroe, Northampton	3 hr
Jul 29, 5:03 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh, Monroe, Northampton	42 min
Jul 29, 5:08 PM EDT	Tornado Warning	PHI	Bucks	37 min
Jul 29, 5:27 PM EDT	Areal Flood Advisory	PHI	Bucks	3 hr
Jul 29, 5:32 PM EDT	Flash Flood Warning	PHI	Northampton	2 hr
Jul 29, 5:32 PM EDT	Tornado Warning	PHI	Bucks	28 min
Jul 29, 5:51 PM EDT	Tornado Warning Tornado observedConsiderable damage threat	PHI	Bucks	24 min
Jul 29, 5:58 PM EDT	Flash Flood Warning	PHI	Bucks	3 hr
Jul 29, 6:06 PM EDT	Tornado Warning Considerable damage threat	PHI	Bucks	39 min
Jul 29, 6:21 PM EDT	Special Weather Statement	PHI	Bucks	24 min
Jul 29, 6:45 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	45 min
Jul 29, 7:12 PM EDT	Flash Flood Warning	PHI	Bucks, Philadelphia	4 hr
Jul 29, 7:25 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	50 min
Jul 29, 3:33 AM EDT	Small Craft Advisory	PHI		20 hr
Jul 29, 1:33 PM EDT	Special Marine Warning	PHI		42 min
Jul 29, 2:53 PM EDT	Special Marine Warning	PHI		100 min
Jul 29, 4:26 PM EDT	Special Weather Statement	PHI	Morris	34 min
Jul 29, 5:01 PM EDT	Special Weather Statement	PHI	Morris	29 min
Jul 29, 6:44 PM EDT	Tornado Warning	PHI	Mercer, Monmouth, Ocean	46 min
Jul 29, 6:56 PM EDT	Flash Flood Warning	PHI	Mercer, Middlesex, Monmouth, Ocean, Somerset	4 hr
Jul 29, 7:18 PM EDT	Tornado Warning	PHI	Mercer, Middlesex, Monmouth, Ocean	27 min
Jul 29, 7:28 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	47 min
Jul 29, 7:52 PM EDT	Special Marine Warning	PHI		113 min

Nearby

Tornado Warnings in Pennsylvania, 2021 Tornado Warnings in New Jersey, 2021 Every tornado warning in 2021 Tornadoes in 2021

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.