Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 54, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 4, 2021, 3:18 PM EDT for Bucks County, Pennsylvania; Burlington County, Mercer County, New Jersey. It was in force for 42 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
- Jun 4, 2021, 3:18 PM EDT (19:18 UTC)
- Expired
- Jun 4, 2021, 4:00 PM EDT
- In force
- 42 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Burlington County, NJ, Mercer County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 44 km from the middle of the area, began a volume at 19:17 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, 3:58 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. |
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, 7.3 hours before the alert went out and 184 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.
176
WUUS51 KPHI 041918
SVRPHI
NJC005-021-PAC017-042000-
/O.NEW.KPHI.SV.W.0054.210604T1918Z-210604T2000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
318 PM EDT Fri Jun 4 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southwestern Mercer County in central New Jersey...
North central Burlington County in southern New Jersey...
Southeastern Bucks County in southeastern Pennsylvania...
* Until 400 PM EDT.
* At 318 PM EDT, a severe thunderstorm was located over Langhorne, or
10 miles west of Trenton, 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...
Trenton, Ewing, Florence, Bristol, Bordentown, Yardley, Newtown,
Tullytown, Langhorne, Feasterville-Trevose, Florence-Roebling,
Feasterville, Woodside, Richboro, Crosswicks, White Horse,
Mercerville-Hamilton Square, Langhorn, Levittown and Morrisville.
This includes the following highways...
New Jersey Turnpike between exits 7 and 7A.
Pennsylvania Turnpike between mile markers 349 and 359.
Interstate 95 in Pennsylvania near mile marker 40.
Interstate 195 in New Jersey between mile markers 0 and 4.
Interstate 295 in New Jersey between mile markers 54 and 66, and
near mile marker 76.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4009 7466 4013 7500 4014 7502 4028 7505
4027 7462
TIME...MOT...LOC 1918Z 272DEG 21KT 4020 7495
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
JEO2 follow-up statements
043
WWUS51 KPHI 041936 RRA
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
336 PM EDT Fri Jun 4 2021
NJC005-021-PAC017-042000-
/O.CON.KPHI.SV.W.0054.000000T0000Z-210604T2000Z/
Mercer NJ-Burlington NJ-Bucks PA-
336 PM EDT Fri Jun 4 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR SOUTH CENTRAL MERCER...NORTH CENTRAL BURLINGTON AND SOUTHEASTERN
BUCKS COUNTIES...
At 336 PM EDT, a severe thunderstorm was located near Trenton, moving
east at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Trenton, Florence, Bristol, Bordentown, Tullytown, Langhorne,
Feasterville-Trevose, Florence-Roebling, Feasterville, Crosswicks,
White Horse, Langhorn, Levittown, Mercerville-Hamilton Square,
Richboro, Morrisville, Penndel, Langhorne Manor, Hulmeville and
Fieldsboro.
This includes the following highways...
New Jersey Turnpike between exits 7 and 7A.
Pennsylvania Turnpike between mile markers 349 and 359.
Interstate 95 in Pennsylvania near mile marker 40.
Interstate 195 in New Jersey between mile markers 0 and 4.
Interstate 295 in New Jersey between mile markers 54 and 63.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4009 7466 4013 7500 4014 7502 4022 7499
4023 7463
TIME...MOT...LOC 1936Z 272DEG 21KT 4020 7481
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
JEO279
WWUS51 KPHI 041953
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
353 PM EDT Fri Jun 4 2021
NJC005-021-PAC017-042003-
/O.EXP.KPHI.SV.W.0054.000000T0000Z-210604T2000Z/
Mercer NJ-Burlington NJ-Bucks PA-
353 PM EDT Fri Jun 4 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MERCER...NORTH
CENTRAL BURLINGTON AND SOUTHEASTERN BUCKS COUNTIES WILL EXPIRE AT 400
PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southern and central New Jersey...and southeastern Pennsylvania.
LAT...LON 4009 7466 4013 7500 4014 7502 4022 7499
4023 7463
TIME...MOT...LOC 1953Z 272DEG 21KT 4010 7493
$$
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, 3:23 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 67 min |
| Jun 4, 3:46 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Philadelphia | 44 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.