Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 278, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 27, 2021, 4:06 PM EDT for Camden County, Gloucester County, New Jersey. It was in force for 39 min. 1 report 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
- Aug 27, 2021, 4:06 PM EDT (20:06 UTC)
- Expired
- Aug 27, 2021, 4:45 PM EDT
- In force
- 39 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Camden County, NJ, Gloucester County, NJ
The radar
The Philadelphia radar (KDIX), 60 km from the middle of the area, began a volume at 20:08 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 |
|---|---|---|---|
| Aug 27, 4:55 PM EDT | HAIL 0.7 | Monroe Twp, NJ |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.1 hours before the alert went out and 196 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
- 1436 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 1124 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
555
WUUS51 KPHI 272006
SVRPHI
NJC007-015-272045-
/O.NEW.KPHI.SV.W.0278.210827T2006Z-210827T2045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
406 PM EDT Fri Aug 27 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
South central Camden County in southern New Jersey...
East central Gloucester County in southern New Jersey...
* Until 445 PM EDT.
* At 406 PM EDT, a severe thunderstorm was located near Monroe
Township, or 14 miles north of Vineland, and is nearly stationary.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Glassboro, Clayton, Chesilhurst, Victory Lakes, Sicklerville,
Williamstown and Monroe Township.
This includes Atlantic City Expressway between mile markers 31 and
40.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to hail and damaging winds, frequent cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.
&&
LAT...LON 3962 7510 3974 7510 3974 7486 3961 7487
TIME...MOT...LOC 2006Z 256DEG 3KT 3967 7492
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gorse2 follow-up statements
818
WWUS51 KPHI 272021
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
421 PM EDT Fri Aug 27 2021
NJC007-015-272045-
/O.CON.KPHI.SV.W.0278.000000T0000Z-210827T2045Z/
Camden NJ-Gloucester NJ-
421 PM EDT Fri Aug 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTH CENTRAL CAMDEN AND EAST CENTRAL GLOUCESTER COUNTIES...
At 420 PM EDT, a severe thunderstorm was located over Victory Lakes,
or 12 miles north of Vineland, moving southeast at 5 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Glassboro, Clayton, Chesilhurst, Victory Lakes, Sicklerville,
Williamstown and Monroe Township.
This includes Atlantic City Expressway between mile markers 31 and
40.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.
&&
LAT...LON 3962 7510 3974 7510 3974 7486 3961 7487
TIME...MOT...LOC 2020Z 301DEG 5KT 3965 7497
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gorse325
WWUS51 KPHI 272039
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
439 PM EDT Fri Aug 27 2021
NJC007-015-272049-
/O.EXP.KPHI.SV.W.0278.000000T0000Z-210827T2045Z/
Camden NJ-Gloucester NJ-
439 PM EDT Fri Aug 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CAMDEN AND EAST
CENTRAL GLOUCESTER COUNTIES WILL EXPIRE AT 445 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with this thunderstorm.
LAT...LON 3962 7510 3974 7510 3974 7486 3961 7487
TIME...MOT...LOC 2039Z 256DEG 3KT 3965 7495
$$
GorseThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 1:33 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden | 83 min |
| Aug 27, 2:18 PM EDT | Small Craft Advisory | PHI | 44 hr | |
| Aug 27, 2:28 PM EDT | Special Weather Statement | PHI | Atlantic | 47 min |
| Aug 27, 2:33 PM EDT | Areal Flood Advisory | PHI | Warren | 109 min |
| Aug 27, 2:37 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 38 min |
| Aug 27, 2:38 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 35 min |
| Aug 27, 2:59 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 46 min |
| Aug 27, 3:07 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 24 min |
| Aug 27, 3:16 PM EDT | Special Weather Statement | PHI | Burlington | 44 min |
| Aug 27, 3:30 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 45 min |
| Aug 27, 3:38 PM EDT | Special Weather Statement | PHI | Camden | 52 min |
| Aug 27, 3:45 PM EDT | Special Weather Statement | PHI | Ocean | 30 min |
| Aug 27, 3:54 PM EDT | Special Weather Statement | PHI | Atlantic | 51 min |
| Aug 27, 3:59 PM EDT | Special Weather Statement | PHI | Ocean | 46 min |
| Aug 27, 4:37 PM EDT | Areal Flood Advisory | PHI | Gloucester | 106 min |
| Aug 27, 4:46 PM EDT | Special Marine Warning | PHI | 43 min | |
| Aug 27, 4:56 PM EDT | Special Weather Statement | PHI | Atlantic | 34 min |
| Aug 27, 5:02 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cumberland | 29 min |
| Aug 27, 5:09 PM EDT | Areal Flood Advisory | PHI | Atlantic, Cape May, Cumberland | 2 hr |
| Aug 27, 5:21 PM EDT | Special Weather Statement | PHI | Middlesex | 39 min |
| Aug 27, 5:29 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Somerset | 3 hr |
| Aug 27, 5:44 PM EDT | Flash Flood Warning | PHI | Middlesex | 4 hr |
| Aug 27, 6:52 PM EDT | Areal Flood Advisory | PHI | Salem | 98 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 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.