Alert archive / New Jersey / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

April 28, 2021Passaic County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Apr 28, 2021, 9:01 PM EDT for Passaic County, New Jersey. It was in force for 29 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
Apr 28, 2021, 9:01 PM EDT (01:01 UTC)
Expired
Apr 28, 2021, 9:30 PM EDT
In force
29 min
Issued by
NWS Philadelphia/Mount Holly

County Passaic County, NJ

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 1.0 hours before the alert went out and 125 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 00:00Z on 2021-04-29Temperature 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 00:00Z on 2021-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 311 square meters per square second.1939587897Sfc1 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
1815 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
311 m²/s²
0-3 km storm-relative helicity
286 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

438 
WWUS81 KPHI 290101
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
901 PM EDT Wed Apr 28 2021

NJZ008-290130-
Morris-
901 PM EDT Wed Apr 28 2021

..STRONG THUNDERSTORM OUTFLOW WINDS WILL AFFECT NORTHEASTERN MORRIS 
COUNTY...

At 859 PM EDT, strong thunderstorm outflow winds were moving into 
northeastern Morris County from the northwest.

Wind gusts of 40 to 50 mph are possible with the outflow from a 
storm just to the north.

Locations impacted include...
Lincoln Park, Kinnelon, Butler, Riverdale and Pequannock Township. 

This includes Interstate 287 in New Jersey between mile markers 48
and 54.
 
LAT...LON 4090 7429 4091 7433 4089 7434 4090 7434
      4105 7448 4105 7444 4102 7443 4103 7442
      4102 7440 4100 7430 4097 7428 4092 7429
      4091 7428
TIME...MOT...LOC 0059Z 327DEG 52KT 4098 7435 

$$

Gorse

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 28, 8:05 PM EDTSpecial Weather StatementPHISussex40 min
Apr 28, 8:17 PM EDTSevere Thunderstorm WarningPHISussex43 min
Apr 29, 3:29 AM EDTSmall Craft AdvisoryPHI27 hr
Apr 29, 3:29 AM EDTStorm WatchPHI21 hr
Apr 29, 3:32 AM EDTHigh Wind WatchPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more16 hr
Apr 29, 3:47 PM EDTGale WarningPHI23 hr
Apr 29, 7:23 PM EDTHigh Wind WarningPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more26 hr
Apr 29, 7:45 PM EDTSevere Thunderstorm WarningPHICamden, Gloucester, Salem45 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.