Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 3, NWS Philadelphia/Mount Holly

March 28, 20216 counties in New Jersey; 4 counties in Pennsylvania; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Mar 28, 2021, 6:47 PM EDT for 6 counties in New Jersey; 4 counties in Pennsylvania; New Castle County, Delaware. It was in force for 43 min. 32 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 28, 2021, 6:47 PM EDT (22:47 UTC)
Expired: Mar 28, 2021, 7:30 PM EDT
In force: 43 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties New Castle County, DE, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Mercer County, NJ, Monmouth County, NJ, Salem County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 66 km from the middle of the area, began a volume at 22:47 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
Mar 28, 6:47 PM EDT	TSTM WND DMG	Cragmere, DE	SEVERAL REPORTS OF DOWNED TREE LIMBS AND POWER LINES IN THE BELLEFONTE AREA. TIME ESTIMATED FROM RADAR.
Mar 28, 6:50 PM EDT	TSTM WND DMG	Aston Twp, PA	MPING REPORT OF LARGE TREE LIMBS OR POWER POLES DOWN. TIME ESTIMATED FROM RADAR.
Mar 28, 6:50 PM EDT	TSTM WND DMG	Middletown Twp, PA	TREE AND WIRES DOWN ON MIDDLETOWN RD.
Mar 28, 6:50 PM EDT	TSTM WND DMG	Radnor Township, PA	DOWNED TREE AND WIRES IN RADNOR TWP. TIME ESTIMATED FROM RADAR.
Mar 28, 6:50 PM EDT	TSTM WND GST 64	Shellburne, DE	DEDOT GAUGE AT I-95 AND MARSH ROAD.
Mar 28, 6:52 PM EDT	TSTM WND DMG	1 Nw Whitemarsh Twp, PA	SEVERAL REPORTS OF DOWNED TREE LIMBS AND WIRES IN THE PLYMOUTH MEETING AREA. TIME ESTIMATED FROM RADAR.
Mar 28, 6:52 PM EDT	TSTM WND DMG	Boothwyn, PA	DOWNED TREE LIMBS AND WIRES NEAR SECOND AVENUE. TIME ESTIMATED FROM RADAR.
Mar 28, 6:52 PM EDT	TSTM WND DMG	Oldmans Twp., NJ	SEVERAL REPORTS OF DOWNED WIRES FROM PENNS GROVE TO BECKETT. TIME ESTIMATED FROM RADAR.
Mar 28, 6:54 PM EDT	TSTM WND DMG	Chester, PA	SEVERAL DOWNED TREE AND WIRE REPORTS IN CHESTER. TIME ESTIMATED FROM RADAR.
Mar 28, 6:55 PM EDT	TSTM WND DMG	Brookhaven, PA	ESTIMATED WINDS OVER 60 MPH WITH DOWNED POWER LINES IN BROOKHAVEN.
Mar 28, 6:57 PM EDT	TSTM WND DMG	2 E Abington, PA	TREE AND WIRES DOWN ACROSS THE ROAD ON WASHINGTON LN AT STOCKTON RD. TIME ESTIMATED FROM RADAR.
Mar 28, 6:58 PM EDT	TSTM WND DMG	Morton, PA	SEVERAL REPORTS OF POWER LINES DOWN FROM SYCAMORE HILLS TO BROOMALL. TIME ESTIMATED FROM RADAR.
Mar 28, 6:58 PM EDT	TSTM WND DMG	Penn Wynne, PA	SEVERAL REPORTS OF DOWNED TREE LIMBS AND WIRES IN THE PENN WYNNE AREA. TIME ESTIMATED FROM RADAR.
Mar 28, 6:59 PM EDT	TSTM WND DMG	2 E Abington, PA	SEVERAL REPORTS OF DOWNED WIRES IN THE ABINGTON AREA. TIME ESTIMATED FROM RADAR.
Mar 28, 7:00 PM EDT	TSTM WND DMG	Upper Darby Twp, PA	TREE AND WIRES DOWN ON PINE ST.
Mar 28, 7:03 PM EDT	TSTM WND DMG	1 W Stenton, PA	DOWNED WIRES NEAR SUSQUEHANNA AVENUE. TIME ESTIMATED FROM RADAR.
Mar 28, 7:03 PM EDT	TSTM WND DMG	Cheltenham, PA	SEVERAL REPORTS OF DOWNED TREE LIMBS AND WIRES IN CHELTENHAM AND ELKINS PARK. TIME ESTIMATED FROM RADAR.
Mar 28, 7:04 PM EDT	TSTM WND DMG	National Park, NJ	DOWNED WIRES NEAR GROVE AVENUE. TIME ESTIMATED FROM RADAR.
Mar 28, 7:05 PM EDT	TSTM WND DMG	Westville, NJ	TREE LIMBS AND UTILITY WIRES DOWN.
Mar 28, 7:06 PM EDT	TSTM WND DMG	2 Wsw Langhorne, PA	DOWNED TREE LIMBS AND WIRES NEAR ARROWHEAD DRIVE. TIME ESTIMATED FROM RADAR.
Mar 28, 7:07 PM EDT	TSTM WND DMG	Deptford, NJ	TREES, UTILITY POLES, AND FENCES BLOWN DOWN IN DEPTFORD. TIME ESTIMATED FROM RADAR.
Mar 28, 7:08 PM EDT	TSTM WND DMG	1 Ese Woodbury, NJ	DOWNED WIRES NEAR COOPER STREET. TIME ESTIMATED FROM RADAR.
Mar 28, 7:08 PM EDT	TSTM WND DMG	2 E Feasterville-Trevos, PA	DOWNED TREE LIMBS AND WIRES NEAR CANTERBERRY COURT. TIME ESTIMATED FROM RADAR.
Mar 28, 7:10 PM EDT	TSTM WND DMG	Edgewater Park Twp, NJ	NWS EMPLOYEE ESTIMATED 60 MPH WIND GUSTS WITH DOWNED FENCING AND TREE BRANCHES.
Mar 28, 7:10 PM EDT	TSTM WND DMG	Glassboro, NJ	TREE LIMBS AND UTILITY WIRES DOWN.
Mar 28, 7:11 PM EDT	TSTM WND DMG	1 Nw Blackwood, NJ	DOWNED TREE LIMBS AND WIRES NEAR GOOD INTENT ROAD. TIME ESTIMATED FROM RADAR.
Mar 28, 7:12 PM EDT	TSTM WND GST 60	Haddon Twp, NJ	NWS EMPLOYEE ESTIMATED 60 MPH WIND GUSTS. TIME ESTIMATED FROM RADAR.
Mar 28, 7:15 PM EDT	TSTM WND DMG	2 Nnw Clayton, NJ	DOWNED UTILITY POLE ON STATE HIGHWAY 47 SOUTH OF U.S. HIGHWAY 322. TIME ESTIMATED FROM RADAR.
Mar 28, 7:17 PM EDT	TSTM WND DMG	1 Wnw Fellowship, NJ	DOWNED UTILITY POLE NEAR CHURCH ROAD. TIME ESTIMATED FROM RADAR.
Mar 28, 7:20 PM EDT	TSTM WND DMG	Williamstown, NJ	MULTIPLE TRANFORMERS OBSERVED BLOWING OUT IN WILLIAMSTOWN. TIME ESTIMATED FROM RADAR.
Mar 28, 7:21 PM EDT	TSTM WND DMG	1 Ese Sicklerville, NJ	SEVERAL REPORTS OF DOWNED TREES AND WIRES IN SICKLERVILLE. TIME ESTIMATED FROM RADAR.
Mar 28, 7:27 PM EDT	TSTM WND DMG	3 Ne Jobstown, NJ	DOWNED TREES AND WIRES NEAR MOUNT PLEASANT ROAD. 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
Mar 28, 5:05 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 10.8 hours before the alert went out and 211 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: 644 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 249 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

087 
WUUS51 KPHI 282247
SVRPHI
DEC003-NJC005-007-015-021-025-033-PAC017-045-091-101-282330-
/O.NEW.KPHI.SV.W.0003.210328T2247Z-210328T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
647 PM EDT Sun Mar 28 2021

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northeastern New Castle County in northern Delaware...
  Salem County in southern New Jersey...
  Camden County in southern New Jersey...
  South central Mercer County in central New Jersey...
  Gloucester County in southern New Jersey...
  Northwestern Burlington County in southern New Jersey...
  Western Monmouth County in central New Jersey...
  Southeastern Montgomery County in southeastern Pennsylvania...
  Southeastern Bucks County in southeastern Pennsylvania...
  Philadelphia County in southeastern Pennsylvania...
  Delaware County in southeastern Pennsylvania...

* Until 730 PM EDT.

* At 646 PM EDT, severe thunderstorms were located along a line
  extending from Norristown to Arden to Pennsville, moving east at 55
  mph. This line of storms has a history of producing wind damage.

  HAZARD...60 mph wind gusts.

  SOURCE...Public.

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

* Locations impacted include...
  Philadelphia, Camden, Wilmington, Vineland, Gloucester City, Cherry
  Hill, Bensalem, Evesham, Mount Laurel, Norristown, Chester,
  Willingboro, Deptford, Voorhees, Medford, West Deptford, Glassboro,
  Lindenwold, West Norriton and Hammonton.

This includes the following highways...
 New Jersey Turnpike between exits 1 and 7A.
 Pennsylvania Turnpike between mile markers 327 and 359.
 Northeast Extension between mile markers 21 and 23.
 Interstate 95 in Pennsylvania between mile markers 0 and 40.
 Interstate 95 in Delaware between mile markers 17 and 23.
 Interstate 76 in Pennsylvania between mile markers 327 and 351.
 Interstate 76 in New Jersey between mile markers 0 and 3.
 Interstate 195 in New Jersey between mile markers 9 and 10.
 Interstate 295 in New Jersey between mile markers 0 and 60.
 Interstate 676 in Pennsylvania between mile markers 0 and 1.
 Interstate 676 in New Jersey between mile markers 0 and 4.
 Interstate 476 in Pennsylvania between mile markers 0 and 19.
 Atlantic City Expressway between mile markers 30 and 44.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of 
a building. This severe thunderstorm may contain little or no 
lightning. Do not wait until you hear thunder before taking cover.

&&

LAT...LON 3970 7476 3954 7496 3954 7503 3956 7505
      3955 7508 3957 7559 3980 7553 4000 7544
      4007 7536 4006 7539 4008 7541 4016 7537
      4019 7453
TIME...MOT...LOC 2246Z 269DEG 47KT 4012 7532 3980 7550 3963 7552 

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

Staarmann

2 follow-up statements

633 
WWUS51 KPHI 282310
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
710 PM EDT Sun Mar 28 2021

DEC003-PAC045-282318-
/O.CAN.KPHI.SV.W.0003.000000T0000Z-210328T2330Z/
New Castle DE-Delaware PA-
710 PM EDT Sun Mar 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NEW CASTLE AND
DELAWARE COUNTIES IS CANCELLED...

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

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

LAT...LON 3956 7535 3988 7521 4003 7526 4017 7513
      4019 7453 3970 7476 3954 7496 3954 7503
      3956 7505 3955 7508
TIME...MOT...LOC 2308Z 249DEG 54KT 4015 7493 3991 7510 3972 7515 

$$

NJC005-007-015-021-025-033-PAC017-091-101-282330-
/O.CON.KPHI.SV.W.0003.000000T0000Z-210328T2330Z/
Salem NJ-Camden NJ-Mercer NJ-Gloucester NJ-Burlington NJ-Monmouth NJ-
Montgomery PA-Bucks PA-Philadelphia PA-
710 PM EDT Sun Mar 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR EAST CENTRAL SALEM...CAMDEN...SOUTH CENTRAL MERCER...
GLOUCESTER...NORTHWESTERN BURLINGTON...WESTERN MONMOUTH...
SOUTHEASTERN MONTGOMERY...SOUTHEASTERN BUCKS AND PHILADELPHIA
COUNTIES...

At 708 PM EDT, severe thunderstorms were located along a line
extending from Langhorne to Audubon Park to Pitman, moving east at 
65 mph. This line of storms has a history of producing wind damage 
and wind gusts in excess of 60 mph.

HAZARD...60 mph wind gusts.

SOURCE...Trained weather spotters.

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

Locations impacted include...
Philadelphia, Camden, Vineland, Gloucester City, Cherry Hill,
Bensalem, Evesham, Mount Laurel, Willingboro, Deptford, Voorhees,
Medford, West Deptford, Glassboro, Lindenwold, Hammonton, Lumberton,
Florence, Bellmawr and Woodbury.

This includes the following highways...
 New Jersey Turnpike between exits 3 and 7A.
 Pennsylvania Turnpike between mile markers 342 and 359.
 Interstate 95 in Pennsylvania between mile markers 15 and 40.
 Interstate 76 in Pennsylvania between mile markers 337 and 351.
 Interstate 76 in New Jersey between mile markers 0 and 3.
 Interstate 195 in New Jersey between mile markers 9 and 10.
 Interstate 295 in New Jersey between mile markers 19 and 60.
 Interstate 676 in Pennsylvania between mile markers 0 and 1.
 Interstate 676 in New Jersey between mile markers 0 and 4.
 Atlantic City Expressway between mile markers 30 and 44.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of 
a building. This severe thunderstorm may contain little or no 
lightning. Do not wait until you hear thunder before taking cover.

&&

LAT...LON 3956 7535 3988 7521 4003 7526 4017 7513
      4019 7453 3970 7476 3954 7496 3954 7503
      3956 7505 3955 7508
TIME...MOT...LOC 2308Z 249DEG 54KT 4015 7493 3991 7510 3972 7515 

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

Staarmann

123 
WWUS51 KPHI 282323
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
723 PM EDT Sun Mar 28 2021

NJC033-PAC091-101-282333-
/O.CAN.KPHI.SV.W.0003.000000T0000Z-210328T2330Z/
Salem NJ-Montgomery PA-Philadelphia PA-
723 PM EDT Sun Mar 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL SALEM...
SOUTHEASTERN MONTGOMERY AND PHILADELPHIA COUNTIES IS CANCELLED...

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

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

LAT...LON 3972 7475 3954 7496 3954 7502 3959 7509
      3987 7497 4003 7500 4018 7480 4019 7453
TIME...MOT...LOC 2323Z 269DEG 47KT 4015 7471 3991 7488 3972 7493 

$$

NJC005-007-015-021-025-PAC017-282330-
/O.CON.KPHI.SV.W.0003.000000T0000Z-210328T2330Z/
Camden NJ-Mercer NJ-Gloucester NJ-Burlington NJ-Monmouth NJ-Bucks PA-
723 PM EDT Sun Mar 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR EASTERN CAMDEN...SOUTH CENTRAL MERCER...SOUTHEASTERN
GLOUCESTER...NORTHWESTERN BURLINGTON...WESTERN MONMOUTH AND
SOUTHEASTERN BUCKS COUNTIES...

At 723 PM EDT, severe thunderstorms were located along a line
extending from Bordentown to near Evesham to near Sicklerville,
moving east at 55 mph.

HAZARD...60 mph wind gusts.

SOURCE...Trained weather spotters.

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

Locations impacted include...
Evesham, Mount Laurel, Willingboro, Voorhees, Medford, Lindenwold,
Lumberton, Florence, Burlington, Bristol, Mount Holly, Clayton,
Riverside, Berlin, Tabernacle, Bordentown, Beverly, Tullytown,
Allentown and Chesilhurst.

This includes the following highways...
 New Jersey Turnpike between exits 4 and 7A.
 Pennsylvania Turnpike between mile markers 357 and 359.
 Interstate 95 in Pennsylvania near mile marker 39.
 Interstate 195 in New Jersey between mile markers 9 and 10.
 Interstate 295 in New Jersey between mile markers 36 and 60.
 Atlantic City Expressway between mile markers 30 and 41.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

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

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

&&

LAT...LON 3972 7475 3954 7496 3954 7502 3959 7509
      3987 7497 4003 7500 4018 7480 4019 7453
TIME...MOT...LOC 2323Z 269DEG 47KT 4015 7471 3991 7488 3972 7493 

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

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 28, 2:39 AM EDT	Gale Warning	PHI		35 hr
Mar 28, 6:21 PM EDT	Special Marine Warning	PHI		54 min
Mar 28, 6:43 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset, Warren	47 min
Mar 28, 7:17 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth, Ocean, Somerset	60 min
Mar 28, 7:20 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Monmouth, Ocean	70 min
Mar 28, 7:38 PM EDT	Special Marine Warning	PHI		111 min
Mar 28, 5:04 PM EDT	Special Weather Statement	PHI	Berks	41 min
Mar 28, 5:13 PM EDT	Special Weather Statement	PHI	Carbon	32 min
Mar 28, 5:45 PM EDT	Special Weather Statement	PHI	Berks, Lehigh	30 min
Mar 28, 6:02 PM EDT	Special Weather Statement	PHI	Chester	28 min
Mar 28, 6:12 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery	48 min
Mar 28, 6:15 PM EDT	Special Weather Statement	PHI	Montgomery	30 min
Mar 28, 7:54 PM EDT	Special Weather Statement	PHI	Sussex	36 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2021 Severe Thunderstorm Warnings in Pennsylvania, 2021 Severe Thunderstorm Warnings in Delaware, 2021 Every severe thunderstorm warning 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.