Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 56, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 4, 2021, 3:46 PM EDT for Bucks County, Philadelphia County, Pennsylvania; Burlington County, Camden County, Mercer County, New Jersey. It was in force for 44 min. 13 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
- Jun 4, 2021, 3:46 PM EDT (19:46 UTC)
- Expired
- Jun 4, 2021, 4:30 PM EDT
- In force
- 44 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Burlington County, NJ, Camden County, NJ, Mercer County, NJ, Bucks County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 33 km from the middle of the area, began a volume at 19:47 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 |
|---|---|---|---|
| Jun 4, 3:48 PM EDT | TSTM WND DMG | 1 Nne Bristol Twp, PA | TREE OR LIMBS DOWN ON WIRES WITH AN OUTAGE ON WHITEWOOD DR. TIME ESTIMATED FROM RADAR. |
| Jun 4, 3:54 PM EDT | HAIL 0.75 | Florence, NJ | REPORT AND VIDEO VIA SOCIAL MEDIA. |
| Jun 4, 3:56 PM EDT | TSTM WND DMG | Andalusia, PA | SOCIAL MEDIA REPORT OF DOWNED TREE LIMBS FROM STRONG WINDS AND PEA-SIZED HAIL. TIME ESTIMATED FROM RADAR. |
| Jun 4, 3:58 PM EDT | TSTM WND DMG | 1 Sw Roebling, NJ | SEVERAL DOWNED TREE LIMBS ALONG I-295 NEAR FLORENCE AND COLUMBUS. SECONDHAND REPORT FROM OFF DUTY NWS EMPLOYEE. TIME ESTIMATED FROM RADAR. |
| Jun 4, 3:58 PM EDT | TSTM WND DMG | Palmyra, NJ | TREE DOWN ON WIRES IN PALMYRA. TIME ESTIMATED FROM RADAR. |
| Jun 4, 3:58 PM EDT | HAIL 0.75 | 1 Wnw Eddington, PA | |
| Jun 4, 4:06 PM EDT | TSTM WND DMG | Tioga, PA | DOWNED WIRES NEAR CLEARFIELD ST. TIME ESTIMATED FROM RADAR. |
| Jun 4, 4:13 PM EDT | TSTM WND DMG | 1 W North Hanover Twp, NJ | A CALL WAS MADE FOR A TREE DOWN ON WIRES WITH SMOKE IN NORTH HANOVER TWP. TIME ESTIMATED FROM RADAR. |
| Jun 4, 4:22 PM EDT | TSTM WND DMG | 1 N Wrightstown, NJ | DOWNED WIRES NEAR MCGUIRE ACCESS HIGHWAY. TIME ESTIMATED FROM RADAR. |
| Jun 4, 4:26 PM EDT | TSTM WND DMG | 1 Wnw South Jersey Regi, NJ | DOWNED TREE NEAR CLAVER HILL WAY. TIME ESTIMATED FROM RADAR. |
| Jun 4, 4:26 PM EDT | TSTM WND DMG | 3 Wsw New Egypt, NJ | DOWNED WIRES NEAR THE INTERSECTION OF JACOBSTOWN-COOKSTOWN ROAD AND CROSHAW ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 4, 4:29 PM EDT | TSTM WND GST 61 | Fort Dix, NJ | IN ADDITION, THE WIND WAS SUSTAINED AT 40 MPH AT THE TIME OF THIS GUST. |
| Jun 4, 4:34 PM EDT | TSTM WND GST 64 | Fort Dix, NJ | KWRI METAR. |
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 |
|---|---|---|---|
| Jun 4, 3:09 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 7.8 hours before the alert went out and 187 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.
- Mixed-layer CAPE
- 233 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 526 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
669
WUUS51 KPHI 041946
SVRPHI
NJC005-007-021-PAC017-101-042030-
/O.NEW.KPHI.SV.W.0056.210604T1946Z-210604T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
346 PM EDT Fri Jun 4 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Camden County in southern New Jersey...
South central Mercer County in central New Jersey...
Northwestern Burlington County in southern New Jersey...
Southeastern Bucks County in southeastern Pennsylvania...
Central Philadelphia County in southeastern Pennsylvania...
* Until 430 PM EDT.
* At 346 PM EDT, severe thunderstorms were located along a line
extending from near Trenton to Wissinoming, moving east at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to
roofs, siding, trees, and power lines is possible.
* Locations impacted include...
Philadelphia, Trenton, Camden, Bensalem, Mount Laurel, Willingboro,
Lumberton, Florence, Burlington, Bristol, Mount Holly, Riverside,
Palmyra, Bordentown, Beverly, Tullytown, Pemberton, Wrightstown,
Wissinoming and Florence-Roebling.
People at the Burlington County Mega Site should seek safe shelter
immediately!
This includes the following highways...
New Jersey Turnpike between exits 5 and 7A.
Pennsylvania Turnpike between mile markers 353 and 359.
Interstate 95 in Pennsylvania between mile markers 23 and 40.
Interstate 195 in New Jersey near mile marker 0.
Interstate 295 in New Jersey between mile markers 37 and 60.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3990 7478 3998 7521 4022 7480 4014 7459
4007 7455
TIME...MOT...LOC 1946Z 284DEG 23KT 4018 7477 4003 7510
HAIL...1.00IN
WIND...60MPH
$$
JEO1 follow-up statement
846
WWUS51 KPHI 042030
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
430 PM EDT Fri Jun 4 2021
NJC005-007-021-PAC017-101-042040-
/O.EXP.KPHI.SV.W.0056.000000T0000Z-210604T2030Z/
Camden NJ-Mercer NJ-Burlington NJ-Bucks PA-Philadelphia PA-
430 PM EDT Fri Jun 4 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CAMDEN...SOUTH
CENTRAL MERCER...NORTHWESTERN BURLINGTON...SOUTHEASTERN BUCKS AND
CENTRAL PHILADELPHIA COUNTIES HAS EXPIRED...
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been allowed to expire.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southern New Jersey...and southeastern Pennsylvania.
LAT...LON 3990 7478 3998 7521 4022 7480 4014 7459
4007 7455
TIME...MOT...LOC 2030Z 284DEG 23KT 4011 7443 3996 7476
$$
JEOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 3, 8:44 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 30 min |
| Jun 4, 1:02 PM EDT | Special Weather Statement | PHI | Lehigh | 28 min |
| Jun 4, 1:07 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 38 min |
| Jun 4, 1:29 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh | 2 hr |
| Jun 4, 1:45 PM EDT | Areal Flood Advisory | PHI | Monroe, Northampton | 97 min |
| Jun 4, 1:49 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 41 min |
| Jun 4, 2:21 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 21 min |
| Jun 4, 2:24 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 51 min |
| Jun 4, 2:27 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 48 min |
| Jun 4, 3:14 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 46 min |
| Jun 4, 3:16 PM EDT | Areal Flood Advisory | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 98 min |
| Jun 4, 3:18 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 42 min |
| Jun 4, 3:23 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 67 min |
| Jun 4, 4:20 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 40 min |
| Jun 3, 8:14 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth, Ocean | 19 min |
| Jun 3, 8:55 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth | 10 min |
| Jun 4, 2:43 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren | 62 min |
| Jun 4, 2:49 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren | 70 min |
| Jun 4, 4:12 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 63 min |
| Jun 4, 4:22 PM EDT | Special Marine Warning | PHI | 53 min | |
| Jun 4, 4:23 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 52 min |
| Jun 4, 4:30 PM EDT | Areal Flood Advisory | PHI | Middlesex, Monmouth, Ocean | 63 min |
| Jun 4, 5:09 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Jun 4, 5:12 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 18 min |
| Jun 4, 5:32 PM EDT | Special Marine Warning | PHI | 58 min | |
| Jun 4, 6:18 PM EDT | Special Weather Statement | PHI | Atlantic | 42 min |
| Jun 4, 6:27 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland | 48 min |
| Jun 4, 7:13 PM EDT | Special Marine Warning | PHI | 62 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2021Severe Thunderstorm Warnings in Pennsylvania, 2021Every 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.