Alert archive / New Jersey / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 408, NWS Philadelphia/Mount Holly

October 31, 20198 counties in New Jersey; Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Oct 31, 2019, 11:54 PM EDT for 8 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 66 min. 3 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, 1:00 AM EDT
In force: 66 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Burlington County, NJ, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Salem County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 34 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, 11:57 PM EDT	TSTM WND DMG	1 N Merchantville, NJ	DOWNED POWER LINES ON U.S. HIGHWAY 130 SOUTHBOUND SOUTH OF UNION AVENUE. 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.
Nov 1, 12:35 AM EDT	TSTM WND DMG	1 Ene Metuchen, NJ	DOWNED POWER LINES ON STATE HIGHWAY 27 SOUTH OF GROVE AVENUE. 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 177 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.

889 
WUUS51 KPHI 010354
SVRPHI
NJC005-007-011-015-021-023-025-033-PAC017-010500-
/O.NEW.KPHI.SV.W.0408.191101T0354Z-191101T0500Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm 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

* Severe Thunderstorm Warning for...
  Northwestern Cumberland County in southern New Jersey...
  Salem County in southern New Jersey...
  Camden County in southern New Jersey...
  Mercer County in central New Jersey...
  Gloucester County in southern New Jersey...
  Northern Burlington County in southern New Jersey...
  Central Monmouth County in central New Jersey...
  Middlesex County in northern New Jersey...
  Southeastern Bucks County in southeastern Pennsylvania...

* Until 100 AM EDT.

* At 1154 PM EDT, severe thunderstorms were located along a line
  extending from near Richboro to near Alloway, moving northeast at
  70 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Philadelphia, Trenton, Camden, Vineland, New Brunswick, Perth
  Amboy, Bridgeton, Gloucester City, Somerset, Edison, Cherry Hill,
  Old Bridge, Bensalem, East Brunswick, Evesham, South Brunswick,
  Sayreville, Mount Laurel, North Brunswick and Manalapan.

This includes the following highways...
 Atlantic City Expressway between mile markers 29 and 44.
 Garden State Parkway between mile markers 121 and 133.
 Interstate 195 in New Jersey between mile markers 0 and 16.
 Interstate 287 in New Jersey between mile markers 0 and 10.
 Interstate 295 in New Jersey between mile markers 17 and 76.
 Interstate 95 in Pennsylvania between mile markers 34 and 40.
 New Jersey Turnpike between exits 2 and 13.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.

This severe thunderstorm may contain little or no lightning. Do not
wait until you hear thunder before taking cover.

&&

LAT...LON 4060 7421 4050 7428 4045 7423 4015 7443
      4008 7455 4003 7452 3973 7472 3946 7504
      3941 7553 3944 7557 3986 7524 3988 7515
      4005 7498 4018 7499 4038 7474 4037 7461
      4049 7446 4055 7452 4059 7449
TIME...MOT...LOC 0354Z 234DEG 61KT 4029 7498 3957 7529 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

Iovino

1 follow-up statement

682 
WWUS51 KPHI 010435
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1235 AM EDT Fri Nov 1 2019

NJC033-010444-
/O.CAN.KPHI.SV.W.0408.000000T0000Z-191101T0500Z/
Salem NJ-
1235 AM EDT Fri Nov 1 2019

...THE SEVERE THUNDERSTORM WARNING FOR SALEM COUNTY IS CANCELLED...

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

LAT...LON 4060 7421 4050 7428 4045 7423 4015 7443
      4008 7455 4003 7452 3973 7472 3946 7504
      4038 7474 4037 7461 4049 7446 4055 7452
      4059 7449
TIME...MOT...LOC 0434Z 246DEG 37KT 4051 7443 3979 7474 

$$

NJC005-007-011-015-021-023-025-PAC017-010500-
/O.CON.KPHI.SV.W.0408.000000T0000Z-191101T0500Z/
Cumberland NJ-Camden NJ-Mercer NJ-Gloucester NJ-Burlington NJ-
Monmouth NJ-Middlesex NJ-Bucks PA-
1235 AM EDT Fri Nov 1 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 AM EDT
FOR NORTH CENTRAL CUMBERLAND...SOUTHEASTERN CAMDEN...MERCER...
SOUTHEASTERN GLOUCESTER...NORTHERN BURLINGTON...CENTRAL MONMOUTH...
MIDDLESEX AND EASTERN BUCKS COUNTIES...

At 1234 AM EDT, severe thunderstorms were located along a line
extending from near New Brunswick to near Shamong, moving northeast
at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Trenton, Vineland, New Brunswick, Perth Amboy, Somerset, Edison, Old
Bridge, East Brunswick, Evesham, South Brunswick, Sayreville, North
Brunswick, Manalapan, Ewing, Medford, Carteret, Hammonton, Middlesex,
Lumberton and Princeton.

This includes the following highways...
 Atlantic City Expressway between mile markers 29 and 37.
 Garden State Parkway between mile markers 121 and 133.
 Interstate 195 in New Jersey between mile markers 0 and 16.
 Interstate 287 in New Jersey between mile markers 0 and 10.
 Interstate 295 in New Jersey between mile markers 44 and 71.
 New Jersey Turnpike between exits 5 and 13.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.

This severe thunderstorm may contain little or no lightning. Do not
wait until you hear thunder before taking cover.

&&

LAT...LON 4060 7421 4050 7428 4045 7423 4015 7443
      4008 7455 4003 7452 3973 7472 3946 7504
      4038 7474 4037 7461 4049 7446 4055 7452
      4059 7449
TIME...MOT...LOC 0434Z 246DEG 37KT 4051 7443 3979 7474 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

Iovino

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	Tornado Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset	36 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

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.