Alert archive / New Jersey / Tornado Warnings in 2021

Tornado Warning 2, NWS Philadelphia/Mount Holly

July 1, 2021Burlington County, Mercer County, New Jersey; Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this tornado warning at Jul 1, 2021, 5:02 PM EDT for Burlington County, Mercer County, New Jersey; Bucks County, Pennsylvania. It was in force for 28 min. 1 report 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 1, 2021, 5:02 PM EDT (21:02 UTC)
Expired: Jul 1, 2021, 5:30 PM EDT
In force: 28 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Burlington County, NJ, Mercer County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 39 km from the middle of the area, began a volume at 21:06 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 1, 5:19 PM EDT	TSTM WND DMG	2 Wsw Yardville, NJ	DOWNED WIRES ON GRAND AVENUE. 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
Jul 1, 12:46 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.0 hours before the alert went out and 179 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: 286 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 978 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

437 
WFUS51 KPHI 012102
TORPHI
NJC005-021-PAC017-012130-
/O.NEW.KPHI.TO.W.0002.210701T2102Z-210701T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
502 PM EDT Thu Jul 1 2021

The National Weather Service in Mount Holly NJ has issued a

* Tornado Warning for...
  South central Mercer County in central New Jersey...
  North central Burlington County in southern New Jersey...
  Southeastern Bucks County in southeastern Pennsylvania...

* Until 530 PM EDT.
    
* At 502 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Levittown, or near Trenton, moving east at 25 mph.

  HAZARD...Tornado.

  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...
  Trenton, Bordentown, Tullytown, Mercerville-Hamilton Square,
  Crosswicks, White Horse, Levittown, Florence-Roebling, Morrisville,
  Fieldsboro, Yardville-Groveville and Fairless Hills.

This includes the following highways...
 New Jersey Turnpike between exits 7 and 7A.
 Interstate 195 in New Jersey between mile markers 0 and 6.
 Interstate 295 in New Jersey between mile markers 55 and 63.

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 4013 7489 4021 7487 4024 7462 4009 7460
TIME...MOT...LOC 2102Z 273DEG 20KT 4016 7484 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Davis

3 follow-up statements

743 
WWUS51 KPHI 012108
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
508 PM EDT Thu Jul 1 2021

NJC005-021-PAC017-012130-
/O.CON.KPHI.TO.W.0002.000000T0000Z-210701T2130Z/
Mercer NJ-Burlington NJ-Bucks PA-
508 PM EDT Thu Jul 1 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR SOUTH
CENTRAL MERCER...NORTH CENTRAL BURLINGTON AND EASTERN BUCKS
COUNTIES...
    
At 507 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Tullytown, or near Trenton, moving east at 25 mph.

HAZARD...Tornado.

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...
Trenton, Bordentown, Tullytown, Crosswicks, White Horse,
Florence-Roebling, Mercerville-Hamilton Square, Levittown, Fieldsboro
and Yardville-Groveville.

This includes the following highways...
 New Jersey Turnpike between exits 7 and 7A.
 Interstate 195 in New Jersey between mile markers 0 and 5.
 Interstate 295 in New Jersey between mile markers 55 and 62.

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 4013 7483 4020 7482 4022 7462 4009 7460
TIME...MOT...LOC 2107Z 273DEG 20KT 4016 7480 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Davis

815 
WWUS51 KPHI 012117
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
517 PM EDT Thu Jul 1 2021

PAC017-012125-
/O.CAN.KPHI.TO.W.0002.000000T0000Z-210701T2130Z/
Bucks PA-
517 PM EDT Thu Jul 1 2021

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

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southern and central New Jersey...and southeastern Pennsylvania.

LAT...LON 4009 7460 4011 7474 4012 7475 4014 7474
      4015 7472 4017 7474 4020 7473 4022 7462
TIME...MOT...LOC 2115Z 273DEG 20KT 4016 7474 

$$

NJC005-021-012130-
/O.CON.KPHI.TO.W.0002.000000T0000Z-210701T2130Z/
Mercer NJ-Burlington NJ-
517 PM EDT Thu Jul 1 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR SOUTH
CENTRAL MERCER AND NORTH CENTRAL BURLINGTON COUNTIES...
    
At 515 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Bordentown, or near Trenton, moving east at 25 mph.

HAZARD...Tornado.

SOURCE...Public report of rotation 5 miles south of Trenton, NJ.

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...
Bordentown, Crosswicks, White Horse, Mercerville-Hamilton Square,
Fieldsboro and Yardville-Groveville.

This includes the following highways...
 New Jersey Turnpike between exits 7 and 7A.
 Interstate 195 in New Jersey between mile markers 0 and 5.
 Interstate 295 in New Jersey between mile markers 55 and 61.

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 4009 7460 4011 7474 4012 7475 4014 7474
      4015 7472 4017 7474 4020 7473 4022 7462
TIME...MOT...LOC 2115Z 273DEG 20KT 4016 7474 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Davis

170 
WWUS51 KPHI 012123
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
523 PM EDT Thu Jul 1 2021

NJC005-021-012132-
/O.EXP.KPHI.TO.W.0002.000000T0000Z-210701T2130Z/
Mercer NJ-Burlington NJ-
523 PM EDT Thu Jul 1 2021

...THE TORNADO WARNING FOR SOUTH CENTRAL MERCER AND NORTH CENTRAL
BURLINGTON COUNTIES WILL EXPIRE AT 530 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southern and central New Jersey...and southeastern Pennsylvania.

Remember, a Severe Thunderstorm Warning still remains in effect for
Mercer and Burlington Counties.

LAT...LON 4009 7460 4011 7474 4012 7475 4014 7474
      4015 7472 4017 7474 4020 7473 4022 7462
TIME...MOT...LOC 2122Z 273DEG 20KT 4016 7469 

$$

Davis

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 8:37 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer	38 min
Jun 30, 8:56 PM EDT	Special Marine Warning	PHI		94 min
Jun 30, 9:05 PM EDT	Special Weather Statement	PHI	Somerset	40 min
Jun 30, 9:21 PM EDT	Special Weather Statement	PHI	Salem	39 min
Jun 30, 9:49 PM EDT	Special Weather Statement	PHI	Monmouth	26 min
Jun 30, 9:51 PM EDT	Special Marine Warning	PHI		60 min
Jul 1, 2:58 AM EDT	Small Craft Advisory	PHI		17 hr
Jul 1, 1:10 PM EDT	Special Weather Statement	PHI	Monmouth	50 min
Jul 1, 1:16 PM EDT	Special Weather Statement	PHI	Atlantic	29 min
Jul 1, 1:28 PM EDT	Special Marine Warning	PHI		62 min
Jul 1, 1:31 PM EDT	Special Weather Statement	PHI	Cumberland	29 min
Jul 1, 4:21 PM EDT	Special Marine Warning	PHI		114 min
Jul 1, 4:27 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Salem and 1 more	48 min
Jul 1, 4:55 PM EDT	Severe Thunderstorm Warning	PHI	Cape May, Cumberland, Salem	80 min
Jul 1, 4:59 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Mercer, Middlesex, Monmouth and 2 more	46 min
Jul 1, 5:27 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 5 more	93 min
Jul 1, 5:35 PM EDT	Tornado Warning	PHI	Mercer, Monmouth, Ocean	25 min
Jul 1, 5:40 PM EDT	Special Marine Warning	PHI		65 min
Jul 1, 5:46 PM EDT	Special Marine Warning	PHI		119 min
Jul 1, 6:13 PM EDT	Special Marine Warning	PHI		92 min
Jun 30, 8:16 PM EDT	Special Weather Statement	PHI	Bucks, Montgomery	44 min
Jul 1, 2:51 PM EDT	Special Weather Statement	PHI	Chester, Montgomery	39 min
Jul 1, 3:13 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery	47 min
Jul 1, 3:23 PM EDT	Areal Flood Advisory	PHI	Chester, Montgomery	77 min
Jul 1, 3:48 PM EDT	Areal Flood Advisory	PHI	Bucks, Delaware, Montgomery, Philadelphia	112 min
Jul 1, 3:50 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	40 min

Nearby

Tornado Warnings in New Jersey, 2021 Tornado Warnings in Pennsylvania, 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.