Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 223, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 21, 2021, 5:31 PM EDT for Cape May County, New Jersey. It was in force for 29 min. 4 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
- Jul 21, 2021, 5:31 PM EDT (21:31 UTC)
- Expired
- Jul 21, 2021, 6:00 PM EDT
- In force
- 29 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Cape May County, NJ
The radar
The Dover AFB radar (KDOX), 48 km from the middle of the area, began a volume at 21:35 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 |
|---|---|---|---|
| Jul 21, 5:32 PM EDT | TSTM WND DMG | Lower Township, NJ | TREE DOWN IN CAPE ROAD ROAD IN LOWER TOWNSHIP. TIME ESTIMATED FROM RADAR. |
| Jul 21, 5:33 PM EDT | TSTM WND GST 58 | 1 Ssw North Cape May, NJ | NOS SITE AT NORTH CAPE MAY MEASURES 58MPH GUST (TIME BETWEEN 5:30 AND 5:35 PM). |
| Jul 21, 5:36 PM EDT | TSTM WND DMG | 1 Nnw Cape May Harbor, NJ | WIRES DOWN ON OCEAN DRIVE IN CAPE MAY. TIME ESTIMATED FROM RADAR. |
| Jul 21, 5:36 PM EDT | TSTM WND DMG | 1 Sw Wildwood Crest, NJ | TELEPHONE POLE SNAPPED IN HALF ON W PRESTON AVE IN WILDWOOD CREST. PHOTO RELAYED ON SOCIAL MEDIA. 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 |
|---|---|---|---|
| Jul 21, 11:56 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 9.5 hours before the alert went out and 123 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
- 728 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 1221 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- -10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
610
WUUS51 KPHI 212131
SVRPHI
NJC009-212200-
/O.NEW.KPHI.SV.W.0223.210721T2131Z-210721T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
531 PM EDT Wed Jul 21 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southwestern Cape May County in southern New Jersey...
* Until 600 PM EDT.
* At 531 PM EDT, a severe thunderstorm was located over North Cape
May, or near Cape May, moving east at 25 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...
Cape May, North Wildwood, Wildwood Crest, Sea Isle City, Avalon,
West Cape May, Stone Harbor, Cape May Court House, Scotch Bonnet,
Diamond Beach, Green Creek, Rio Grande, North Cape May, Villas,
West Wildwood, Erma and Whitesboro-Burleigh.
This includes Garden State Parkway between mile markers 0 and 14.
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.
In addition to large 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.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3888 7503 3906 7507 3916 7465 3889 7483
TIME...MOT...LOC 2131Z 260DEG 22KT 3899 7496
HAIL...0.75IN
WIND...60MPH
$$
MPS1 follow-up statement
138
WWUS51 KPHI 212151
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
551 PM EDT Wed Jul 21 2021
NJC009-212201-
/O.EXP.KPHI.SV.W.0223.000000T0000Z-210721T2200Z/
Cape May NJ-
551 PM EDT Wed Jul 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CAPE MAY COUNTY
WILL EXPIRE AT 600 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire. However, gusty
winds and heavy rain are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southern New Jersey.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 3888 7503 3906 7507 3916 7465 3889 7483
TIME...MOT...LOC 2151Z 260DEG 22KT 3903 7465
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 11:09 AM EDT | Special Weather Statement | PHI | Morris | 36 min |
| Jul 21, 12:41 PM EDT | Special Weather Statement | PHI | Ocean | 34 min |
| Jul 21, 12:46 PM EDT | Special Marine Warning | PHI | 89 min | |
| Jul 21, 12:51 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Ocean | 39 min |
| Jul 21, 12:53 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 67 min |
| Jul 21, 1:28 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic | 47 min |
| Jul 21, 1:43 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 49 min |
| Jul 21, 2:10 PM EDT | Special Marine Warning | PHI | 95 min | |
| Jul 21, 2:13 PM EDT | Severe Thunderstorm Warning | PHI | Burlington | 47 min |
| Jul 21, 2:35 PM EDT | Special Marine Warning | PHI | 55 min | |
| Jul 21, 2:52 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 26 min |
| Jul 21, 3:04 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester | 56 min |
| Jul 21, 3:16 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden | 44 min |
| Jul 21, 3:27 PM EDT | Severe Thunderstorm Warning | PHI | Camden, Gloucester | 33 min |
| Jul 21, 3:43 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 47 min |
| Jul 21, 3:48 PM EDT | Special Marine Warning | PHI | 57 min | |
| Jul 21, 3:48 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden | 42 min |
| Jul 21, 3:57 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Gloucester, Salem | 33 min |
| Jul 21, 4:04 PM EDT | Special Marine Warning | PHI | 56 min | |
| Jul 21, 4:17 PM EDT | Special Marine Warning | PHI | 58 min | |
| Jul 21, 4:50 PM EDT | Special Marine Warning | PHI | 55 min | |
| Jul 21, 5:07 PM EDT | Special Marine Warning | PHI | 23 min | |
| Jul 21, 5:09 PM EDT | Special Marine Warning | PHI | 66 min | |
| Jul 21, 5:24 PM EDT | Special Marine Warning | PHI | 46 min | |
| Jul 21, 5:52 PM EDT | Special Marine Warning | PHI | 53 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.