Alert archive / New Jersey / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

September 8, 2021Sussex County, Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Sep 8, 2021, 9:43 PM EDT for Sussex County, Warren County, New Jersey. It was in force for 47 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
Sep 8, 2021, 9:43 PM EDT (01:43 UTC)
Expired
Sep 8, 2021, 10:30 PM EDT
In force
47 min
Issued by
NWS Philadelphia/Mount Holly
Hail
0.25 in
Wind
40

Counties Sussex County, NJ, Warren County, NJ

The radar

The Philadelphia radar (KDIX), 120 km from the middle of the area, began a volume at 01:45 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 00:00Z, 1.7 hours before the alert went out and 160 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 2021-09-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 619 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 00:00Z on 2021-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 211 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
619 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
807 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
211 m²/s²
0-3 km storm-relative helicity
225 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.4

Open this sounding in Storm Lab

The text

As transmitted.

721 
WWUS81 KPHI 090143
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
943 PM EDT Wed Sep 8 2021
 
NJZ001-007>009-090230-
Hunterdon NJ-Morris NJ-Sussex NJ-Warren NJ-
943 PM EDT Wed Sep 8 2021

...Strong thunderstorms will impact portions of north central
Hunterdon, northwestern Morris, Sussex and central Warren Counties
through 1030 PM EDT...

At 943 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Sussex to Belvidere. Movement was east at
20 mph.

HAZARD...Wind gusts up to 45 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...
Newton, Hopatcong, Hackettstown, Washington, Mount Arlington,
Franklin, Stanhope, Hamburg, Netcong, Belvidere, Oxford, Ogdensburg,
Sussex, Hope, Branchville, Andover, Brass Castle, Lake Mohawk,
Greendell and Vernon Valley.

This includes Interstate 80 in New Jersey between mile markers 10 and
30.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

A Severe Thunderstorm Watch remains in effect until midnight EDT for
northern and northwestern New Jersey...and eastern Pennsylvania.

&&

LAT...LON 4120 7436 4110 7449 4104 7450 4105 7447
      4074 7481 4076 7517 4080 7510 4082 7508
      4084 7509 4086 7505 4088 7505 4129 7464
      4131 7457
TIME...MOT...LOC 0143Z 260DEG 18KT 4125 7461 4080 7506 

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

$$

Staarmann

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 8, 9:16 PM EDTAreal Flood AdvisoryPHIWarren3 hr
Sep 8, 9:16 PM EDTSpecial Weather StatementPHISussex, Warren29 min
Sep 8, 10:42 PM EDTFlash Flood WarningPHIWarren6 hr
Sep 8, 10:56 PM EDTSpecial Weather StatementPHIWarren34 min
Sep 8, 11:27 PM EDTSevere Thunderstorm WarningPHIHunterdon, Warren48 min
Sep 8, 11:30 PM EDTAreal Flood AdvisoryPHIMorris, Sussex4 hr
Sep 9, 12:07 AM EDTSpecial Weather StatementPHIHunterdon, Somerset, Warren23 min
Sep 9, 12:18 AM EDTSpecial Marine WarningPHI57 min
Sep 9, 12:30 AM EDTSpecial Weather StatementPHIMorris30 min
Sep 9, 12:41 AM EDTSpecial Marine WarningPHI52 min
Sep 9, 2:17 AM EDTSpecial Weather StatementPHIOcean28 min
Sep 9, 2:46 AM EDTSpecial Weather StatementPHIAtlantic29 min
Sep 9, 3:14 AM EDTSpecial Weather StatementPHIAtlantic31 min
Sep 9, 3:30 AM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Cape May, Cumberland112 min
Sep 9, 4:28 AM EDTAreal Flood WarningPHIWarren4 hr
Sep 8, 8:47 PM EDTSpecial Weather StatementPHINorthampton28 min
Sep 8, 9:12 PM EDTSpecial Weather StatementPHILehigh48 min
Sep 8, 9:38 PM EDTSpecial Weather StatementPHIBerks52 min
Sep 8, 9:46 PM EDTSpecial Weather StatementPHILehigh, Northampton44 min
Sep 8, 9:48 PM EDTFlash Flood WarningPHILehigh, Northampton7 hr
Sep 8, 9:59 PM EDTAreal Flood AdvisoryPHIBerks3 hr
Sep 8, 10:11 PM EDTSevere Thunderstorm WarningPHIBerks49 min
Sep 8, 10:23 PM EDTTornado WarningPHIBerks22 min
Sep 8, 10:27 PM EDTSpecial Weather StatementPHINorthampton33 min
Sep 8, 10:47 PM EDTAreal Flood AdvisoryPHICarbon, Monroe3 hr
Sep 8, 10:47 PM EDTSevere Thunderstorm WarningPHIBerks, Lehigh, Montgomery, Northampton58 min
Sep 8, 11:35 PM EDTSpecial Weather StatementPHIChester, Delaware, Montgomery40 min
Sep 9, 12:08 AM EDTSpecial Weather StatementPHIBucks, Delaware, Montgomery, Philadelphia37 min
Sep 9, 4:26 AM EDTAreal Flood WarningPHILehigh, Northampton3 hr
Sep 9, 12:58 AM EDTSpecial Weather StatementPHINew Castle32 min
Sep 9, 1:12 AM EDTAreal Flood AdvisoryPHINew Castle62 min
Sep 9, 5:37 AM EDTAreal Flood AdvisoryPHIKent, New Castle, Sussex3 hr

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.