Alert archive / New Jersey / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

August 10, 20215 counties in New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 10, 2021, 6:27 PM EDT for 5 counties in New Jersey. It was in force for 33 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 10, 2021, 6:27 PM EDT (22:27 UTC)
Expired
Aug 10, 2021, 7:00 PM EDT
In force
33 min
Issued by
NWS Philadelphia/Mount Holly
Hail
0.25 in
Wind
40

Counties Burlington County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ

The radar

The Philadelphia radar (KDIX), 70 km from the middle of the area, began a volume at 22:27 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, 10.5 hours before the alert went out and 131 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2021-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 73 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2021-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
73 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
635 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
103 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

293 
WWUS81 KPHI 102227
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
627 PM EDT Tue Aug 10 2021
 
NJZ008-010-012>015-018>020-027-PAZ071-106-102300-
Morris NJ-Northwestern Burlington NJ-Eastern Monmouth NJ-Camden NJ-
Ocean NJ-Western Monmouth NJ-Somerset NJ-Middlesex NJ-Mercer NJ-
Southeastern Burlington NJ-Lower Bucks PA-Philadelphia PA-
627 PM EDT Tue Aug 10 2021

...Strong thunderstorms will impact portions of northwestern Ocean,
Morris, northwestern Camden, Mercer, northern Burlington, eastern
Somerset, Monmouth, Middlesex, southeastern Bucks and central
Philadelphia Counties through 700 PM EDT...

At 626 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from Mendham to Edison to Kensington. Movement was
east at 45 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects. Minor damage to outdoor objects is 
         possible.

Locations impacted include...
Philadelphia, Trenton, Camden, New Brunswick, Perth Amboy, Long
Branch, Morristown, Gloucester City, Somerset, Edison, Cherry Hill,
Middletown, Old Bridge, Bensalem, Jackson, Howell, East Brunswick,
Evesham, South Brunswick and Sayreville.

This includes the following highways...
 New Jersey Turnpike between exits 4 and 13.
 Pennsylvania Turnpike between mile markers 352 and 359.
 Interstate 95 in Pennsylvania between mile markers 19 and 40.
 Interstate 76 in Pennsylvania between mile markers 344 and 351.
 Interstate 76 in New Jersey between mile markers 2 and 3.
 Interstate 78 in New Jersey between mile markers 37 and 42.
 Interstate 80 in New Jersey between mile markers 26 and 47.
 Interstate 195 in New Jersey between mile markers 0 and 29.
 Interstate 295 in New Jersey between mile markers 33 and 71.
 Interstate 287 in New Jersey between mile markers 0 and 6, and
between mile markers 27 and 53.
 Interstate 676 in Pennsylvania between mile markers 0 and 1.
 Interstate 676 in New Jersey between mile markers 1 and 4.
 Garden State Parkway between mile markers 105 and 134.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 4034 7397 3983 7464 3992 7525 4054 7444
      4091 7477 4090 7471 4094 7465 4100 7430
      4090 7427 4091 7434 4075 7436 4067 7446
      4065 7440 4060 7446 4060 7421 4050 7428
      4047 7427 4041 7399 4048 7402 4047 7400
TIME...MOT...LOC 2226Z 273DEG 38KT 4079 7459 4054 7437 3997 7511 

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

$$

SFJ

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 10, 1:02 AM EDTSpecial Weather StatementPHIBurlington28 min
Aug 10, 3:33 AM EDTExcessive Heat WarningPHIBurlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 5 more4 days
Aug 10, 3:33 AM EDTHeat AdvisoryPHIAtlantic, Cape May, Cumberland, Monmouth, Ocean, Salem and 2 more4 days
Aug 10, 3:54 AM EDTAreal Flood AdvisoryPHIAtlantic80 min
Aug 10, 4:59 AM EDTAreal Flood AdvisoryPHIBurlington60 min
Aug 10, 5:58 AM EDTFlash Flood WarningPHIBurlington, Mercer2 hr
Aug 10, 2:07 PM EDTSpecial Weather StatementPHISalem38 min
Aug 10, 4:52 PM EDTSpecial Weather StatementPHIMonmouth23 min
Aug 10, 4:54 PM EDTSpecial Marine WarningPHI26 min
Aug 10, 5:05 PM EDTSpecial Weather StatementPHISomerset, Warren25 min
Aug 10, 5:09 PM EDTSevere Thunderstorm WarningPHIBurlington, Hunterdon, Mercer, Somerset, Warren51 min
Aug 10, 5:30 PM EDTSpecial Weather StatementPHIWarren30 min
Aug 10, 5:58 PM EDTSpecial Weather StatementPHIMercer, Middlesex, Morris, Somerset, Warren32 min
Aug 10, 6:59 PM EDTSpecial Weather StatementPHIMiddlesex, Monmouth31 min
Aug 10, 7:09 PM EDTSpecial Marine WarningPHI66 min
Aug 10, 7:27 PM EDTSpecial Weather StatementPHIMonmouth33 min
Aug 9, 10:10 PM EDTAreal Flood AdvisoryPHICarbon3 hr
Aug 10, 3:06 PM EDTSpecial Weather StatementPHIBerks24 min
Aug 10, 3:33 PM EDTSpecial Weather StatementPHIBerks27 min
Aug 10, 3:52 PM EDTSpecial Weather StatementPHIBerks, Carbon, Lehigh23 min
Aug 10, 4:01 PM EDTSevere Thunderstorm WarningPHIBerks, Carbon, Chester, Lehigh, Montgomery, Northampton44 min
Aug 10, 4:18 PM EDTAreal Flood AdvisoryPHIBerks, Carbon, Lehigh3 hr
Aug 10, 4:33 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Carbon, Chester, Lehigh, Monroe and 2 more42 min
Aug 10, 5:11 PM EDTSpecial Weather StatementPHIChester, Montgomery, Philadelphia34 min
Aug 10, 5:40 PM EDTSpecial Weather StatementPHIChester35 min
Aug 10, 6:36 PM EDTSevere Thunderstorm WarningPHIBerks, Chester39 min
Aug 10, 7:10 PM EDTSevere Thunderstorm WarningPHIBerks, Chester, Montgomery65 min
Aug 10, 7:54 PM EDTSevere Thunderstorm Warning Considerable damage threatPHIChester51 min
Aug 10, 7:12 PM EDTSpecial Weather StatementPHIKent, Queen Anne's33 min
Aug 10, 7:42 PM EDTSpecial Weather StatementPHIKent, Queen Anne's, Talbot33 min

Nearby

Special Weather Statements in New Jersey, 2021Every special weather statement 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.