Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 12, NWS Philadelphia/Mount Holly

March 3, 20204 states

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Mar 3, 2020, 9:09 PM EST for 4 states. It was in force for 51 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
Mar 3, 2020, 9:09 PM EST (02:09 UTC)
Expired
Mar 3, 2020, 10:00 PM EST
In force
51 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Kent County, DE, New Castle County, DE, Cecil County, MD, Burlington County, NJ, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Salem County, NJ, Somerset County, NJ, Warren County, NJ, Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 76 km from the middle of the area, began a volume at 02:11 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

TimeReportWhereRemark
Mar 3, 9:22 PM ESTTSTM WND DMGArdmore, PASEVERAL REPORTS OF TREES AND WIRES DOWN IN THE LOWER MERION TWP AREA. TIME ESTIMATED FROM RADAR.
Mar 3, 9:22 PM ESTTSTM WND GST 60Thornbury Twp, PAESTIMATED WIND GUST OF 60MPH OR HIGHER WITH A LARGE TREE LIMB DOWN.
Mar 3, 9:30 PM ESTTSTM WND GST 621 Sse Fort Washington, PAPA DOT GAUGE.
Mar 3, 9:31 PM ESTTSTM WND GST 53Northeast Philadelphia, PA
Mar 3, 9:31 PM ESTTSTM WND GST 55New Castle County Airpo, DE
Mar 3, 9:35 PM ESTTSTM WND GST 50Delran, NJ
Mar 3, 9:35 PM ESTTSTM WND GST 51Pennsauken, NJNJ WX NET STATION.
Mar 3, 9:35 PM ESTHAIL 0.25Delran, NJ
Mar 3, 9:38 PM ESTTSTM WND DMG2 Ene Willingboro, NJTREE AND WIRES DOWN ON RANCOCAS ROAD BETWEEN TAISLEY LANE AND KEITH LANE IN BURLINGTON TOWNSHIP. TIME ESTIMATED FROM RADAR.
Mar 3, 9:39 PM ESTTSTM WND DMG1 E Bensalem, PATREE DOWN IN WIRES ON NEWPORTVILLE RD. TIME ESTIMATED FROM RADAR.
Mar 3, 9:41 PM ESTTSTM WND DMG2 Sw Burlington Twp, NJDOWNED TREE AND WIRES IN THE AREA OF RANCOCAS RD BETWEEN TAISLEY LANE AND KEITH LANE. TIME OF EVENT ESTIMATED FROM RADAR.
Mar 3, 9:45 PM ESTTSTM WND GST 48Moorestown, NJNJ WX NET STATION.
Mar 3, 9:45 PM ESTTSTM WND GST 56Lower Alloways Creek, NJNJ WX NET STATION.
Mar 3, 9:45 PM ESTMARINE TSTM WIND 564 Ssw Elsinboro Twp, NJUS ARMY CORPS OF ENGINEERS. LOWER ALLOWAYS CREEK, NJ. NJ WEATHER NETWORK.
Mar 3, 9:46 PM ESTTSTM WND DMG1 Sse Mount Royal, NJMPING REPORT OF TREE OR SHINGLE DAMAGE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 2.2 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-pSkew-T log-p diagram, Brookhaven, NY at 00:00Z on 2020-03-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2020-03-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 455 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
436 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
455 m²/s²
0-3 km storm-relative helicity
462 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

253 
WUUS51 KPHI 040209
SVRPHI
DEC001-003-MDC015-NJC005-007-011-015-019-021-023-027-033-035-041-
PAC017-029-045-091-101-040300-
/O.NEW.KPHI.SV.W.0012.200304T0209Z-200304T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
909 PM EST Tue Mar 3 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  New Castle County in northern Delaware...
  North central Kent County in central Delaware...
  Northeastern Cecil County in northeastern Maryland...
  Northwestern Camden County in southern New Jersey...
  Central Warren County in northwestern New Jersey...
  Mercer County in central New Jersey...
  Somerset County in northern New Jersey...
  West central Cumberland County in southern New Jersey...
  Salem County in southern New Jersey...
  Southern Morris County in northern New Jersey...
  Hunterdon County in northwestern New Jersey...
  Gloucester County in southern New Jersey...
  Northwestern Burlington County in southern New Jersey...
  Western Middlesex County in northern New Jersey...
  Southeastern Montgomery County in southeastern Pennsylvania...
  Bucks County in southeastern Pennsylvania...
  Southeastern Chester County in southeastern Pennsylvania...
  Philadelphia County in southeastern Pennsylvania...
  Delaware County in southeastern Pennsylvania...

* Until 1000 PM EST.

* At 908 PM EST, severe thunderstorms were located along a line
  extending from Great Meadows-Vienna to Chalfont to Fair Hill,
  moving southeast at 40 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, Wilmington, Newark, West Chester,
  Morristown, Somerville, Gloucester City, Somerset, Cherry Hill,
  Bensalem, Evesham, Bridgewater, South Brunswick, Mount Laurel,
  Ewing, Norristown, Willingboro and Deptford.

This includes the following highways...
 Atlantic City Expressway between mile markers 42 and 44.
 Interstate 195 in New Jersey between mile markers 0 and 6.
 Interstate 287 in New Jersey between mile markers 7 and 39.
 Interstate 295 in New Jersey between mile markers 0 and 76.
 Interstate 78 in New Jersey between mile markers 5 and 42.
 Interstate 80 in New Jersey between mile markers 10 and 30.
 Interstate 95 in Pennsylvania between mile markers 0 and 40.
 Interstate 95 in Maryland near mile marker 109.
 New Jersey Turnpike between exits 1 and 7A.
 Interstate 95 in Delaware between mile markers 0 and 23.
 Interstate 476 in Pennsylvania between mile markers 0 and 19.
 Pennsylvania Turnpike between exits 320 and 353.
 Northeast Extension between exits A20 and A31.
 Interstate 676 in New Jersey between mile markers 0 and 4.
 Interstate 676 in Pennsylvania between mile markers 0 and 1.
 Interstate 76 in New Jersey between mile markers 0 and 3.
 Interstate 76 in Pennsylvania between mile markers 327 and 351.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.

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

&&

LAT...LON 4074 7437 4067 7446 4066 7445 4066 7441
      4063 7442 4060 7446 4060 7443 4003 7469
      3931 7553 3976 7590 4030 7530 4099 7497
      4094 7479 4092 7477 4092 7473 4090 7471
      4091 7469 4081 7435
TIME...MOT...LOC 0208Z 298DEG 33KT 4088 7491 4027 7522 3971 7586 

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

MPS
3 follow-up statements
728 
WWUS51 KPHI 040226
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
926 PM EST Tue Mar 3 2020

NJC023-027-041-040236-
/O.CAN.KPHI.SV.W.0012.000000T0000Z-200304T0300Z/
Morris NJ-Warren NJ-Middlesex NJ-
926 PM EST Tue Mar 3 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN MORRIS...CENTRAL
WARREN AND WESTERN MIDDLESEX COUNTIES IS CANCELLED...

The storms which prompted the warning have weakened. Therefore, the 
warning has been cancelled.

LAT...LON 4035 7463 4030 7457 4003 7469 3931 7553
      3975 7589 4024 7520 4060 7494 4046 7451
TIME...MOT...LOC 0226Z 298DEG 33KT 4081 7473 4020 7504 3964 7569 

$$

DEC001-003-MDC015-NJC005-007-011-015-019-021-033-035-PAC017-029-045-
091-101-040300-
/O.CON.KPHI.SV.W.0012.000000T0000Z-200304T0300Z/
New Castle DE-Kent DE-Cecil MD-Camden NJ-Mercer NJ-Somerset NJ-
Cumberland NJ-Salem NJ-Hunterdon NJ-Gloucester NJ-Burlington NJ-
Montgomery PA-Bucks PA-Chester PA-Philadelphia PA-Delaware PA-
926 PM EST Tue Mar 3 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EST
FOR NEW CASTLE...NORTH CENTRAL KENT...NORTHEASTERN CECIL...
NORTHWESTERN CAMDEN...MERCER...SOUTHWESTERN SOMERSET...WEST CENTRAL
CUMBERLAND...SALEM...SOUTHEASTERN HUNTERDON...GLOUCESTER...
NORTHWESTERN BURLINGTON...SOUTHEASTERN MONTGOMERY...SOUTHEASTERN
BUCKS...SOUTHEASTERN CHESTER...PHILADELPHIA AND DELAWARE COUNTIES...

At 926 PM EST, severe thunderstorms were located along a line
extending from near Long Valley to Ivyland to Bear, moving southeast
at 40 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, Wilmington, Newark, West Chester,
Gloucester City, Cherry Hill, Bensalem, Evesham, Mount Laurel, Ewing,
Norristown, Chester, Willingboro, Deptford, Voorhees, West Deptford,
Glassboro and Lindenwold.

This includes the following highways...
 Atlantic City Expressway between mile markers 42 and 44.
 Interstate 195 in New Jersey between mile markers 0 and 6.
 Interstate 295 in New Jersey between mile markers 0 and 76.
 Interstate 95 in Pennsylvania between mile markers 0 and 40.
 Interstate 95 in Maryland near mile marker 109.
 New Jersey Turnpike between exits 1 and 7A.
 Interstate 95 in Delaware between mile markers 0 and 23.
 Interstate 476 in Pennsylvania between mile markers 0 and 19.
 Pennsylvania Turnpike between exits 326 and 353.
 Northeast Extension near exit A20.
 Interstate 676 in New Jersey between mile markers 0 and 4.
 Interstate 676 in Pennsylvania between mile markers 0 and 1.
 Interstate 76 in New Jersey between mile markers 0 and 3.
 Interstate 76 in Pennsylvania between mile markers 327 and 351.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.

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

&&

LAT...LON 4035 7463 4030 7457 4003 7469 3931 7553
      3975 7589 4024 7520 4060 7494 4046 7451
TIME...MOT...LOC 0226Z 298DEG 33KT 4081 7473 4020 7504 3964 7569 

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

MPS
200 
WWUS51 KPHI 040243
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
943 PM EST Tue Mar 3 2020

DEC001-003-MDC015-NJC019-033-PAC029-045-091-101-040252-
/O.CAN.KPHI.SV.W.0012.000000T0000Z-200304T0300Z/
New Castle DE-Kent DE-Cecil MD-Salem NJ-Hunterdon NJ-Montgomery PA-
Chester PA-Philadelphia PA-Delaware PA-
943 PM EST Tue Mar 3 2020

...THE SEVERE THUNDERSTORM WARNING FOR NEW CASTLE...NORTH CENTRAL
KENT...NORTHEASTERN CECIL...SALEM...SOUTHEASTERN HUNTERDON...
SOUTHEASTERN MONTGOMERY...SOUTHEASTERN CHESTER...PHILADELPHIA AND
DELAWARE COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled. Some gusty winds 
may linger behind the departing storms.

LAT...LON 4035 7463 4029 7457 4003 7469 3964 7515
      3965 7518 3941 7542 3945 7542 3947 7537
      3950 7534 3966 7525 3968 7525 3969 7532
      3942 7545 3948 7560 4009 7489 4051 7467
      4047 7452
TIME...MOT...LOC 0242Z 288DEG 47KT 4068 7450 4008 7481 3952 7546 

$$

NJC005-007-011-015-021-035-PAC017-040300-
/O.CON.KPHI.SV.W.0012.000000T0000Z-200304T0300Z/
Cumberland NJ-Camden NJ-Mercer NJ-Gloucester NJ-Burlington NJ-
Somerset NJ-Bucks PA-
943 PM EST Tue Mar 3 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EST
FOR WEST CENTRAL CUMBERLAND...NORTHWESTERN CAMDEN...CENTRAL MERCER...
CENTRAL GLOUCESTER...NORTHWESTERN BURLINGTON...SOUTH CENTRAL SOMERSET
AND SOUTHEASTERN BUCKS COUNTIES...

At 942 PM EST, severe thunderstorms were located along a line
extending from Millington to near Burlington to Hancocks Bridge,
moving east at 55 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Trenton, Camden, Gloucester City, Cherry Hill, Evesham, Mount Laurel,
Ewing, Willingboro, Deptford, Voorhees, Glassboro, Lindenwold,
Lumberton, Princeton, Florence, Bellmawr, Woodbury, Burlington,
Bristol and Mount Holly.

This includes the following highways...
 Atlantic City Expressway between mile markers 42 and 44.
 Interstate 195 in New Jersey between mile markers 0 and 6.
 Interstate 295 in New Jersey between mile markers 24 and 72.
 New Jersey Turnpike between exits 2 and 7A.
 Interstate 676 in New Jersey near mile marker 0.
 Interstate 76 in New Jersey between mile markers 0 and 2.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.

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

&&

LAT...LON 4035 7463 4029 7457 4003 7469 3964 7515
      3965 7518 3941 7542 3945 7542 3947 7537
      3950 7534 3966 7525 3968 7525 3969 7532
      3942 7545 3948 7560 4009 7489 4051 7467
      4047 7452
TIME...MOT...LOC 0242Z 288DEG 47KT 4068 7450 4008 7481 3952 7546 

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

MPS
278 
WWUS51 KPHI 040252
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
952 PM EST Tue Mar 3 2020

NJC005-007-011-015-021-035-PAC017-040302-
/O.EXP.KPHI.SV.W.0012.000000T0000Z-200304T0300Z/
Cumberland NJ-Camden NJ-Mercer NJ-Gloucester NJ-Burlington NJ-
Somerset NJ-Bucks PA-
952 PM EST Tue Mar 3 2020

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL CUMBERLAND...
NORTHWESTERN CAMDEN...CENTRAL MERCER...CENTRAL GLOUCESTER...
NORTHWESTERN BURLINGTON...SOUTH CENTRAL SOMERSET AND SOUTHEASTERN
BUCKS COUNTIES WILL EXPIRE AT 1000 PM EST...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However, gusty 
winds are still possible with these thunderstorms.

LAT...LON 4035 7463 4029 7457 4003 7469 3964 7515
      3965 7518 3941 7542 3945 7542 3947 7537
      3950 7534 3966 7525 3968 7525 3969 7532
      3942 7545 3948 7560 4009 7489 4051 7467
      4047 7452
TIME...MOT...LOC 0252Z 298DEG 33KT 4064 7440 4004 7471 3948 7536 

$$

MPS

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 3, 8:09 PM ESTSpecial Weather StatementPHIBerks, Carbon, Chester, Delaware, Lehigh, Monroe and 2 more51 min
Mar 3, 8:39 PM ESTSevere Thunderstorm WarningPHIBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 3 more51 min
Mar 3, 9:10 PM ESTSpecial Marine WarningPHI53 min
Mar 3, 9:49 PM ESTSpecial Weather StatementPHIAtlantic, Burlington, Camden, Cumberland, Middlesex, Monmouth and 1 more41 min
Mar 3, 9:51 PM ESTSpecial Marine WarningPHI54 min
Mar 3, 10:09 PM ESTSpecial Marine WarningPHI66 min
Mar 3, 10:18 PM ESTSevere Thunderstorm WarningPHIAtlantic, Burlington, Monmouth, Ocean42 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2020Severe Thunderstorm Warnings in Pennsylvania, 2020Severe Thunderstorm Warnings in Delaware, 2020Every severe thunderstorm warning in 2020

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.