Alert archive / New Jersey / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

April 21, 20214 counties in New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Apr 21, 2021, 1:58 PM EDT for 4 counties in New Jersey. It was in force for 62 min. 6 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
Apr 21, 2021, 1:58 PM EDT (17:58 UTC)
Expired
Apr 21, 2021, 3:00 PM EDT
In force
62 min
Issued by
NWS Philadelphia/Mount Holly

Counties Burlington County, NJ, Camden County, NJ, Monmouth County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 21 km from the middle of the area, began a volume at 17:58 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

TimeReportWhereRemark
Apr 21, 2:00 PM EDTHAIL 0.252 Wnw Neptune City, NJ
Apr 21, 2:22 PM EDTHAIL 12 Nw Berkeley Twp, NJAN MPING REPORT OF QUARTER SIZE HAIL. TIME ESTIMATED FROM RADAR.
Apr 21, 2:25 PM EDTHAIL 0.252 Wsw Lakehurst, NJSOCIAL MEDIA.
Apr 21, 2:35 PM EDTHAIL 0.252 Nw Wall Twp, NJ
Apr 21, 2:41 PM EDTTSTM WND DMG2 Se Leisure Village Ea, NJGARDEN SHED BLOWN OVER, SECTION OF VINYL FENCE BROUGHT DOWN, AND SHINGLES BLOWN OFF HOUSE. TIME ESTIMATED FROM RADAR. SOCIAL MEDIA.
Apr 21, 2:44 PM EDTHAIL 0.251 N Seaside Heights, NJ

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 6.0 hours before the alert went out and 150 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 2021-04-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2021-04-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 206 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1427 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
206 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

395 
WWUS81 KPHI 211758
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
158 PM EDT Wed Apr 21 2021

NJZ013-014-017>020-022-026-027-211900-
Northwestern Burlington-Eastern Monmouth-Camden-Coastal
Ocean-Ocean-Western Monmouth-Atlantic-Gloucester-Southeastern
Burlington-
158 PM EDT Wed Apr 21 2021

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT NORTHWESTERN
ATLANTIC...OCEAN...CAMDEN...NORTHEASTERN GLOUCESTER...BURLINGTON AND
MONMOUTH COUNTIES...

At 158 PM EDT, strong thunderstorms were clustered over Chatsworth,
or 20 miles southwest of Toms River, moving east at 55 mph.

Wind gusts up to 50 mph and penny size hail are possible with this
storm.

Locations impacted include...
Toms River, Long Branch, Asbury Park, Sandy Hook, Lakewood, Cherry
Hill, Middletown, Jackson, Howell, Evesham, Mount Laurel, Marlboro,
Manalapan, Voorhees, Medford, Tinton Falls, Lindenwold, Holmdel,
Hammonton and Lumberton.

This includes the following highways...
 New Jersey Turnpike between exits 3 and 4.
 Interstate 195 in New Jersey between mile markers 11 and 34.
 Interstate 295 in New Jersey between mile markers 29 and 36, and
between mile markers 38 and 40.
 Garden State Parkway between mile markers 71 and 115.
 Atlantic City Expressway between mile markers 20 and 44.

If outdoors, consider seeking shelter inside a building.

LAT...LON 3994 7398 3946 7486 3985 7511 4014 7461
      4014 7459 4015 7459 4044 7409 4041 7398
      4048 7401 4043 7397
TIME...MOT...LOC 1758Z 272DEG 48KT 3985 7453 

$$

Davis

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 20, 8:48 PM EDTFreeze WatchPHIHunterdon, Morris, Somerset, Sussex, Warren7 hr
Apr 21, 3:26 AM EDTFreeze WarningPHIHunterdon, Morris, Somerset, Sussex, Warren30 hr
Apr 21, 12:25 PM EDTSevere Thunderstorm WarningPHIWarren50 min
Apr 21, 12:51 PM EDTSevere Thunderstorm WarningPHISussex, Warren21 min
Apr 21, 12:55 PM EDTSevere Thunderstorm WarningPHIHunterdon, Warren27 min
Apr 21, 1:10 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester, Mercer, Salem50 min
Apr 21, 1:17 PM EDTSpecial Weather StatementPHIHunterdon, Morris, Somerset, Sussex58 min
Apr 21, 1:28 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Gloucester36 min
Apr 21, 1:30 PM EDTSpecial Marine WarningPHI60 min
Apr 21, 1:43 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Morris, Somerset33 min
Apr 21, 2:02 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Monmouth, Ocean43 min
Apr 21, 2:03 PM EDTSpecial Weather StatementPHICumberland27 min
Apr 21, 2:17 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cumberland, Gloucester, Salem43 min
Apr 21, 2:28 PM EDTSpecial Weather StatementPHIMiddlesex, Monmouth47 min
Apr 21, 2:30 PM EDTSpecial Marine WarningPHI60 min
Apr 21, 2:38 PM EDTSevere Thunderstorm WarningPHIMonmouth, Ocean37 min
Apr 21, 2:40 PM EDTSpecial Marine WarningPHI55 min
Apr 21, 2:43 PM EDTSpecial Weather StatementPHICape May32 min
Apr 21, 2:50 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Ocean40 min
Apr 21, 3:02 PM EDTSevere Thunderstorm WarningPHIAtlantic28 min
Apr 21, 3:07 PM EDTSpecial Marine WarningPHI53 min
Apr 21, 12:03 PM EDTSpecial Weather StatementPHIChester, Lehigh42 min
Apr 21, 12:17 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Chester, Lehigh, Montgomery, Northampton43 min
Apr 21, 12:54 PM EDTSpecial Weather StatementPHIDelaware36 min
Apr 21, 1:23 PM EDTSevere Thunderstorm WarningPHIKent37 min
Apr 21, 2:09 PM EDTSpecial Weather StatementPHISussex36 min
Apr 21, 2:18 PM EDTSevere Thunderstorm WarningPHIKent, Sussex42 min
Apr 21, 2:47 PM EDTSevere Thunderstorm WarningPHISussex16 min
Apr 21, 12:50 PM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's, Talbot40 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.