Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 277, NWS Philadelphia/Mount Holly

August 27, 2021Burlington County, Ocean County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 27, 2021, 3:30 PM EDT for Burlington County, Ocean County, New Jersey. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 27, 2021, 3:30 PM EDT (19:30 UTC)
Expired: Aug 27, 2021, 4:15 PM EDT
In force: 45 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Burlington County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 24 km from the middle of the area, began a volume at 19:32 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.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.5 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.

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: 1159 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 1043 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

597 
WUUS51 KPHI 271930
SVRPHI
NJC005-029-272015-
/O.NEW.KPHI.SV.W.0277.210827T1930Z-210827T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
330 PM EDT Fri Aug 27 2021

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  South central Ocean County in southern New Jersey...
  Southeastern Burlington County in southern New Jersey...

* Until 415 PM EDT.

* At 330 PM EDT, a severe thunderstorm was located over Wharton State
  Forest, or 24 miles north of Atlantic City, and is nearly
  stationary.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Barnegat, Brookville, Warren Grove, Bass River State Forest,
  Wharton State Forest, Chatsworth, Old Halfway, Penn State Forest,
  Wading River, Beach Haven West, Ocean Acres and Manahawkin.

This includes Garden State Parkway between mile markers 52 and 70.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3965 7427 3959 7443 3963 7463 3974 7472
      3982 7464 3985 7453 3987 7437 3979 7422
TIME...MOT...LOC 1930Z 234DEG 3KT 3972 7458 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

BAH

1 follow-up statement

961 
WWUS51 KPHI 272011
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
411 PM EDT Fri Aug 27 2021

NJC005-029-272020-
/O.EXP.KPHI.SV.W.0277.000000T0000Z-210827T2015Z/
Ocean NJ-Burlington NJ-
411 PM EDT Fri Aug 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL OCEAN AND
SOUTHEASTERN BURLINGTON COUNTIES WILL EXPIRE AT 415 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 are still possible with this thunderstorm.

LAT...LON 3965 7427 3959 7443 3963 7463 3974 7472
      3982 7464 3985 7453 3987 7437 3979 7422
TIME...MOT...LOC 2010Z 234DEG 3KT 3974 7455 

$$

BAH

The 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, 3:38 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, 4:06 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester	39 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, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.