Alert archive / New Jersey / Tornado Warnings in 2019

Tornado Warning 32, NWS Philadelphia/Mount Holly

October 31, 20194 counties in New Jersey; Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this tornado warning at Oct 31, 2019, 11:54 PM EDT for 4 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 36 min. 5 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: Oct 31, 2019, 11:54 PM EDT (03:54 UTC)
Expired: Nov 1, 2019, 12:30 AM EDT
In force: 36 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Somerset County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 47 km from the middle of the area, began a volume at 03:57 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
Oct 31, 11:54 PM EDT	TSTM WND DMG	1 Sw Wrightstown Twp, PA	DOWNED TREE ON SWAMP ROAD NEAR SECOND STREET PIKE. TIME ESTIMATED FROM RADAR.
Nov 1, 12:00 AM EDT	TSTM WND DMG	Washington Crossing, NJ	DOWNED TREE ON STATE HIGHWAY 29 BETWEEN WASHINGTON CROSSING ROAD AND VALLEY ROAD. ALL LANES CLOSED. TIME ESTIMATED FROM RADAR.
Nov 1, 12:14 AM EDT	TSTM WND DMG	1 Ene Hillsborough Twp, NJ	EMERGENCY MANAGEMENT REPORTS NUMEROUS TREES UPROOTED THROUGHOUT HILLSBOROUGH TWP. TIME ESTIMATED FROM RADAR.
Nov 1, 12:15 AM EDT	TSTM WND DMG	1 W Manville, NJ	DOWNED TREE AND WIRES ON U.S. HIGHWAY 206 SOUTHBOUND SOUTH OF DUKES PARKWAY WEST. LANE RESTRICTIONS IN PLACE. TIME ESTIMATED FROM RADAR.
Nov 1, 12:18 AM EDT	TSTM WND DMG	Princeton Junction, NJ	DOWNED TREE ON STATE HIGHWAY 64 SOUTHBOUND NEAR CRANBURY ROAD. ALL LANES CLOSED. 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
Oct 31, 7:56 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 3.9 hours before the alert went out and 160 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: 486 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 491 m²/s²
0-3 km storm-relative helicity: 510 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

285 
WFUS51 KPHI 010354
TORPHI
NJC019-021-023-035-PAC017-010430-
/O.NEW.KPHI.TO.W.0032.191101T0354Z-191101T0430Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
1154 PM EDT Thu Oct 31 2019

The National Weather Service in Mount Holly NJ has issued a

* Tornado Warning for...
  Southeastern Hunterdon County in northwestern New Jersey...
  Mercer County in central New Jersey...
  Southern Somerset County in northern New Jersey...
  Western Middlesex County in northern New Jersey...
  East central Bucks County in southeastern Pennsylvania...

* Until 1230 AM EDT.
    
* At 1154 PM EDT, a severe thunderstorm capable of producing a
  tornado was located near Newtown, or 11 miles west of Trenton,
  moving northeast at 65 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, New Brunswick, Somerville, Somerset, East Brunswick, South
  Brunswick, North Brunswick, Ewing, Middlesex, Princeton, Bound
  Brook, Manville, Jamesburg, Cranbury, Pennington, New Hope,
  Yardley, Newtown, Hopewell and Rocky Hill.

This includes the following highways...
 Interstate 287 in New Jersey between mile markers 10 and 16.
 Interstate 295 in New Jersey between mile markers 66 and 76.
 New Jersey Turnpike near exit 9.

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4030 7439 4021 7500 4029 7506 4062 7456
      4032 7436
TIME...MOT...LOC 0354Z 239DEG 58KT 4027 7497 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

Robertson

3 follow-up statements

230 
WWUS51 KPHI 010407
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1207 AM EDT Fri Nov 1 2019

NJC019-PAC017-010417-
/O.CAN.KPHI.TO.W.0032.000000T0000Z-191101T0430Z/
Hunterdon NJ-Bucks PA-
1207 AM EDT Fri Nov 1 2019

...THE TORNADO WARNING FOR SOUTHEASTERN HUNTERDON AND EAST CENTRAL
BUCKS COUNTIES 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 100 AM EDT for
central, northern and northwestern New Jersey.

LAT...LON 4028 7480 4037 7484 4039 7482 4038 7481
      4040 7480 4058 7453 4033 7436 4031 7436
TIME...MOT...LOC 0407Z 244DEG 50KT 4034 7477 

$$

NJC021-023-035-010430-
/O.CON.KPHI.TO.W.0032.000000T0000Z-191101T0430Z/
Mercer NJ-Somerset NJ-Middlesex NJ-
1207 AM EDT Fri Nov 1 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1230 AM EDT FOR
NORTHEASTERN MERCER...SOUTHERN SOMERSET AND WESTERN MIDDLESEX
COUNTIES...
    
At 1207 AM EDT, a severe thunderstorm capable of producing a tornado
was located over Pennington, or 8 miles north of Trenton, moving
northeast at 55 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...
New Brunswick, Somerset, East Brunswick, South Brunswick, North
Brunswick, Ewing, Middlesex, Princeton, Bound Brook, Manville,
Jamesburg, Cranbury, Pennington, Hopewell, Rocky Hill, Millstone,
Skillman, Princeton Meadows, Kingston and Dayton.

This includes the following highways...
 Interstate 287 in New Jersey between mile markers 10 and 13.
 Interstate 295 in New Jersey between mile markers 68 and 73.
 New Jersey Turnpike near exit 9.

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4028 7480 4037 7484 4039 7482 4038 7481
      4040 7480 4058 7453 4033 7436 4031 7436
TIME...MOT...LOC 0407Z 244DEG 50KT 4034 7477 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

Robertson

979 
WWUS51 KPHI 010419
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1219 AM EDT Fri Nov 1 2019

NJC021-010429-
/O.CAN.KPHI.TO.W.0032.000000T0000Z-191101T0430Z/
Mercer NJ-
1219 AM EDT Fri Nov 1 2019

...THE TORNADO WARNING FOR NORTHEASTERN MERCER 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 100 AM EDT for
central and northern New Jersey.

LAT...LON 4031 7437 4031 7440 4030 7456 4032 7461
      4041 7463 4049 7447 4034 7436 4032 7436
TIME...MOT...LOC 0419Z 252DEG 49KT 4036 7457 

$$

NJC023-035-010430-
/O.CON.KPHI.TO.W.0032.000000T0000Z-191101T0430Z/
Somerset NJ-Middlesex NJ-
1219 AM EDT Fri Nov 1 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1230 AM EDT FOR
SOUTHEASTERN SOMERSET AND SOUTHWESTERN MIDDLESEX COUNTIES...
    
At 1219 AM EDT, a severe thunderstorm capable of producing a tornado
was located over Princeton Meadows, or 10 miles southwest of New
Brunswick, moving east at 55 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...
New Brunswick, Somerset, East Brunswick, South Brunswick, North
Brunswick, Jamesburg, Cranbury, Princeton Meadows, Kingston,
Whittingham, Dayton, Kendall Park, Plainsboro Center, North Brunswick
Township, Clearbrook Park, Spotswood, Milltown, Helmetta, Concordia
and Monmouth Junction.

This includes New Jersey Turnpike near exit 9.
 
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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4031 7437 4031 7440 4030 7456 4032 7461
      4041 7463 4049 7447 4034 7436 4032 7436
TIME...MOT...LOC 0419Z 252DEG 49KT 4036 7457 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

Robertson

620 
WWUS51 KPHI 010426
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1226 AM EDT Fri Nov 1 2019

NJC023-035-010436-
/O.EXP.KPHI.TO.W.0032.000000T0000Z-191101T0430Z/
Somerset NJ-Middlesex NJ-
1226 AM EDT Fri Nov 1 2019

...THE TORNADO WARNING FOR SOUTHEASTERN SOMERSET AND SOUTHWESTERN
MIDDLESEX COUNTIES WILL EXPIRE AT 1230 AM EDT...
    
The tornado threat has diminished and the Tornado Warning has been 
cancelled. However damaging winds remain likely and a Severe 
Thunderstorm Warning remains in effect for the area.  

A Severe Thunderstorm Watch remains in effect until 100 AM EDT for 
central and northern New Jersey.


LAT...LON 4031 7437 4031 7440 4030 7456 4032 7461
      4041 7463 4049 7447 4034 7436 4032 7436
TIME...MOT...LOC 0426Z 239DEG 58KT 4041 7445 

$$

NC

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 31, 10:43 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	77 min
Oct 31, 11:14 PM EDT	Flash Flood Warning	PHI	Warren	4 hr
Oct 31, 11:15 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	60 min
Oct 31, 11:24 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Morris, Somerset	66 min
Oct 31, 11:31 PM EDT	Special Marine Warning	PHI		89 min
Oct 31, 11:54 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Cumberland, Gloucester, Mercer, Middlesex and 2 more	66 min
Nov 1, 12:07 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Cape May, Cumberland, Monmouth, Ocean	83 min
Nov 1, 12:24 AM EDT	Special Marine Warning	PHI		96 min
Nov 1, 12:31 AM EDT	Special Marine Warning	PHI		89 min
Nov 1, 3:06 AM EDT	Areal Flood Warning	PHI	Warren	4 hr
Nov 1, 3:31 AM EDT	Freeze Watch	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Hunterdon and 4 more	6 hr
Nov 1, 9:12 AM EDT	Freeze Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 8 more	25 hr
Nov 1, 9:13 AM EDT	Small Craft Advisory	PHI		9 hr
Oct 31, 8:11 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh	64 min
Oct 31, 8:58 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	62 min
Oct 31, 9:35 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	55 min
Oct 31, 9:41 PM EDT	Flash Flood Warning	PHI	Berks	4 hr
Oct 31, 9:56 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	4 hr
Oct 31, 9:56 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	64 min
Oct 31, 10:23 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Montgomery	67 min
Oct 31, 10:45 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	4 hr
Oct 31, 11:08 PM EDT	Flash Flood Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	4 hr
Oct 31, 11:32 PM EDT	Tornado Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	14 min
Nov 1, 1:43 AM EDT	Areal Flood Warning	PHI	Berks	4 hr
Nov 1, 2:28 AM EDT	River Flood Warning	PHI	Chester	4 hr
Nov 1, 3:02 AM EDT	Areal Flood Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	5 hr
Nov 1, 3:16 PM EDT	Frost Advisory	PHI	Philadelphia	19 hr

Nearby

Tornado Warnings in New Jersey, 2019 Tornado Warnings in Pennsylvania, 2019 Every tornado warning in 2019 Tornadoes 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.