Alert archive / New Jersey / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 36, NWS Philadelphia/Mount Holly

May 31, 2008Morris County, Sussex County, Warren County, New Jersey; Carbon County, Monroe County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 31, 2008, 6:42 PM EDT for Morris County, Sussex County, Warren County, New Jersey; Carbon County, Monroe County, Northampton County, Pennsylvania. It was in force for 33 min. 2 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: May 31, 2008, 6:42 PM EDT (22:42 UTC)
Expired: May 31, 2008, 7:15 PM EDT
In force: 33 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Morris County, NJ, Sussex County, NJ, Warren County, NJ, Carbon County, PA, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 115 km from the middle of the area, began a volume at 22:43 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

Time	Report	Where	Remark
May 31, 7:00 PM EDT	HAIL 0.25	Newton, NJ	PEA SIZE HAIL REPORTED IN NEWTON.
May 31, 7:00 PM EDT	HAIL 0.25	Sse Newton Hamilton, NJ	PEA SIZE HAIL REPORTED IN NEWTON.

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, 10.7 hours before the alert went out and 151 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: 26 J/kg
Mixed-layer CIN: -202 J/kg
Mixed-layer LCL: 768 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 169 m²/s²
0-3 km storm-relative helicity: 185 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS51 KPHI 312241
SVRPHI
NJC027-037-041-PAC025-089-095-312315-
/O.NEW.KPHI.SV.W.0036.080531T2242Z-080531T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
642 PM EDT SAT MAY 31 2008

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
  EAST CENTRAL CARBON COUNTY IN NORTHEAST PENNSYLVANIA...
  SOUTHERN MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
  MORRIS COUNTY IN NORTHERN NEW JERSEY...
  SUSSEX COUNTY IN NORTHWEST NEW JERSEY...
  WARREN COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 715 PM EDT

* AT 639 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM SUSSEX TO ROSSLAND...OR ALONG A
  LINE EXTENDING FROM 32 MILES NORTHWEST OF PATERSON TO 13 MILES
  NORTH OF BETHLEHEM...AND MOVING SOUTHEAST AT 43 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  HOPE...GREENDELL...NAZARETH AND NEWTON BY 650 PM...
  HARMONY...ROXBURG...WILSON AND EASTON BY 655 PM...
  PLEASANT VALLEY AND WASHINGTON BY 700 PM...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

LAT...LON 4122 7442 4118 7438 4108 7449 4104 7449
      4105 7444 4101 7439 4100 7430 4089 7426
      4089 7433 4085 7431 4078 7437 4074 7436
      4076 7485 4078 7489 4073 7495 4062 7519
      4093 7577 4115 7539 4109 7502 4133 7465
TIME...MOT...LOC 2242Z 316DEG 38KT 4125 7454 4079 7537

$$

RNS

1 follow-up statement

000 
WWUS51 KPHI 312300
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
701 PM EDT SAT MAY 31 2008

PAC025-089-312311-
/O.CAN.KPHI.SV.W.0036.000000T0000Z-080531T2315Z/
CARBON PA-MONROE PA-
701 PM EDT SAT MAY 31 2008

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN MONROE AND EAST
CENTRAL CARBON COUNTIES IS CANCELLED...

LAT...LON 4122 7442 4118 7438 4108 7449 4104 7449
      4105 7447 4105 7444 4101 7439 4101 7435
      4099 7429 4074 7436 4076 7485 4078 7489
      4062 7519 4076 7545 4101 7483 4126 7450
TIME...MOT...LOC 2301Z 316DEG 38KT 4122 7439 4094 7474
          4074 7539

$$

NJC027-037-041-PAC095-312315-
/O.CON.KPHI.SV.W.0036.000000T0000Z-080531T2315Z/
SUSSEX NJ-WARREN NJ-MORRIS NJ-NORTHAMPTON PA-
701 PM EDT SAT MAY 31 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR NORTHEASTERN NORTHAMPTON...MORRIS...WARREN AND SOUTHERN SUSSEX
COUNTIES...

AT 657 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM VERNON VALLEY TO ANDOVER TO
CHAPMAN...OR ALONG A LINE EXTENDING FROM 27 MILES NORTHWEST OF
PATERSON TO 32 MILES WEST OF PATERSON TO 10 MILES NORTH OF
BETHLEHEM...MOVING SOUTHEAST AT 44 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  GREEN POND...PLEASANT VALLEY...HARMONY AND WILSON BY 710 PM EDT...
  CHESTER...BUTLER...MOUNTAIN LAKES AND BOONTON BY 715 PM EDT...

LAT...LON 4122 7442 4118 7438 4108 7449 4104 7449
      4105 7447 4105 7444 4101 7439 4101 7435
      4099 7429 4074 7436 4076 7485 4078 7489
      4062 7519 4076 7545 4101 7483 4126 7450
TIME...MOT...LOC 2301Z 316DEG 38KT 4122 7439 4094 7474
          4074 7539

$$

RNS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 1:18 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden	42 min
May 31, 1:45 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Cumberland, Ocean	9 min
May 31, 1:50 PM EDT	Special Marine Warning	PHI		85 min
May 31, 1:57 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Cape May, Ocean	34 min
May 31, 2:01 PM EDT	Special Marine Warning	PHI		59 min
May 31, 2:50 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	55 min
May 31, 2:56 PM EDT	Special Marine Warning	PHI		94 min
May 31, 5:44 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	61 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2008 Severe Thunderstorm Warnings in Pennsylvania, 2008 Every severe thunderstorm warning in 2008

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.