Alert archive / New Jersey / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 176, NWS Philadelphia/Mount Holly

July 18, 2011Sussex County, Warren County, New Jersey; Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 18, 2011, 7:07 PM EDT for Sussex County, Warren County, New Jersey; Monroe County, Pennsylvania. It was in force for 83 min. 1 report 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: Jul 18, 2011, 7:07 PM EDT (23:07 UTC)
Expired: Jul 18, 2011, 8:30 PM EDT
In force: 83 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Sussex County, NJ, Warren County, NJ, Monroe County, PA

The radar

The Philadelphia radar (KDIX), 138 km from the middle of the area, began a volume at 23:08 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
Jul 18, 7:12 PM EDT	TSTM WND DMG	Pocono Twp, PA	TREE DOWN ON HOUSE IN HENRYVILLE AREA. NO INJURIES REPORTED.

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, 11.1 hours before the alert went out and 186 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: 239 J/kg
Mixed-layer CIN: -168 J/kg
Mixed-layer LCL: 1144 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 109 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.

388 
WUUS51 KPHI 182307
SVRPHI
NJC037-041-PAC089-190030-
/O.NEW.KPHI.SV.W.0176.110718T2307Z-110719T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
707 PM EDT MON JUL 18 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF MOUNT POCONO...
  SUSSEX COUNTY IN NORTHWEST NEW JERSEY...
  THIS INCLUDES THE CITY OF NEWTON...
  NORTHERN WARREN COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 830 PM EDT

* AT 704 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  GOULDSBORO STATE PARK...OR 9 MILES NORTHWEST OF MOUNT              
  POCONO...AND MOVING SOUTHEAST AT 25 MPH. A SECOND POSSIBLY SEVERE  
  THUNDERSTORM WAS JUST ABOUT TO ENTER WESTERN SUSSEX COUNTY AND     
  WAS STRENGTHENING.  

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  TOBYHANNA AROUND 715 PM EDT...
  MOUNT POCONO AROUND 720 PM EDT...
  MOUNTAINHOME AROUND 725 PM EDT...
  PARADISE VALLEY...SCOTRUN AND CANADENSIS AROUND 730 PM EDT...
  ALPINE MOUNTAIN AND HERNYVILLE AROUND 735 PM EDT...
  ANALOMINK AROUND 740 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 GREATEST KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

&&

LAT...LON 4116 7516 4115 7509 4109 7503 4111 7495
      4115 7491 4125 7486 4119 7439 4092 7467
      4091 7479 4081 7488 4090 7508 4096 7513
      4094 7518 4114 7564 4121 7558 4125 7550
      4126 7514
TIME...MOT...LOC 2306Z 293DEG 26KT 4119 7548

$$

NIERENBERG

1 follow-up statement

013 
WWUS51 KPHI 190001
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
801 PM EDT MON JUL 18 2011

PAC089-190012-
/O.CAN.KPHI.SV.W.0176.000000T0000Z-110719T0030Z/
MONROE PA-
801 PM EDT MON JUL 18 2011

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MONROE COUNTY IS
CANCELLED...

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 4119 7440 4092 7468 4091 7479 4081 7488
      4090 7508 4096 7511 4096 7514 4102 7503
      4104 7497 4111 7494 4115 7490 4121 7487
      4125 7486
TIME...MOT...LOC 0002Z 295DEG 28KT 4101 7496

$$

NJC037-041-190030-
/O.CON.KPHI.SV.W.0176.000000T0000Z-110719T0030Z/
SUSSEX NJ-WARREN NJ-
801 PM EDT MON JUL 18 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR NORTHERN WARREN AND SUSSEX COUNTIES...

AT 759 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR BLAIRSTOWN...OR 13 MILES WEST OF NEWTON...MOVING
SOUTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  6 MILES NORTHEAST OF HOPE AND 7 MILES SOUTHWEST OF FIVE POINTS BY
  805 PM EDT...
  7 MILES NORTHEAST OF GREAT MEADOWS AND 7 MILES NORTHEAST OF GREAT
  MEADOWS-VIENNA BY 815 PM EDT...
  ALLAMUCHY...ALLAMUCHY-PANTHER VALLEY AND 7 MILES SOUTHWEST OF
  NEWTON BY 820 PM EDT...
  ANDOVER BY 825 PM EDT...
  HOPATCONG AND 7 MILES SOUTHWEST OF LAKE MOHAWK BY 830 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

&&

LAT...LON 4119 7440 4092 7468 4091 7479 4081 7488
      4090 7508 4096 7511 4096 7514 4102 7503
      4104 7497 4111 7494 4115 7490 4121 7487
      4125 7486
TIME...MOT...LOC 0002Z 295DEG 28KT 4101 7496

$$

NIERENBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 7:01 PM EDT	Special Weather Statement	PHI	Sussex, Warren	89 min
Jul 18, 6:04 PM EDT	Special Weather Statement	PHI	Carbon, Monroe, Northampton	56 min
Jul 18, 6:15 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe, Northampton	75 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2011 Severe Thunderstorm Warnings in Pennsylvania, 2011 Every severe thunderstorm warning in 2011

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.