Alert archive / New Jersey / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 157, NWS Philadelphia/Mount Holly

July 7, 2011Atlantic County, Cape May County, Cumberland County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 7, 2011, 8:40 PM EDT for Atlantic County, Cape May County, Cumberland County, New Jersey. It was in force for 80 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: Jul 7, 2011, 8:40 PM EDT (00:40 UTC)
Expired: Jul 7, 2011, 10:00 PM EDT
In force: 80 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Atlantic County, NJ, Cape May County, NJ, Cumberland County, NJ

The radar

The Dover AFB radar (KDOX), 69 km from the middle of the area, began a volume at 00:42 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 7, 8:53 PM EDT	HAIL 0.5	Eldora, NJ
Jul 7, 9:45 PM EDT	MARINE TSTM WIND 47	Ocean City, NJ

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

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 0.7 hours before the alert went out and 156 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: 1707 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 912 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

197 
WUUS51 KPHI 080040
SVRPHI
NJC001-009-011-080200-
/O.NEW.KPHI.SV.W.0157.110708T0040Z-110708T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
840 PM EDT THU JUL 7 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN ATLANTIC COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF ATLANTIC CITY...
  CAPE MAY COUNTY IN SOUTHERN NEW JERSEY...
  CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITIES OF...VINELAND...MILLVILLE...

* UNTIL 1000 PM EDT

* AT 837 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
  CEDARVILLE...OR 8 MILES SOUTHWEST OF MILLVILLE...AND MOVING EAST AT
  20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FORTESQUE AROUND 845 PM EDT...
  DIVIDING CREEK AROUND 850 PM EDT...
  LAUREL LAKE AND PORT NORRIS AROUND 900 PM EDT...
  MAURICETOWN...PORT ELIZABETH AND BIVALVE AROUND 905 PM EDT...
  LEESBURG AND BRICKSBORO AROUND 910 PM EDT...
  BELLEPLAIN FOREST AROUND 925 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.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...HEAVY RAIN WILL OCCUR
WITH THESE STORMS AND CAUSE LOW-LYING AND POOR DRAINAGE FLOODING.

&&

LAT...LON 3936 7440 3930 7455 3898 7481 3905 7493
      3911 7490 3916 7492 3918 7503 3920 7505
      3917 7514 3920 7519 3923 7518 3930 7533
      3951 7519 3946 7509 3949 7507 3937 7448
      3934 7452 3937 7447
TIME...MOT...LOC 0039Z 285DEG 18KT 3932 7517

$$

NIERENBERG

2 follow-up statements

173 
WWUS51 KPHI 080120
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
920 PM EDT THU JUL 7 2011

NJC001-009-011-080200-
/O.CON.KPHI.SV.W.0157.000000T0000Z-110708T0200Z/
CUMBERLAND NJ-CAPE MAY NJ-ATLANTIC NJ-
920 PM EDT THU JUL 7 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT
FOR SOUTHERN ATLANTIC...CAPE MAY AND SOUTHEASTERN CUMBERLAND
COUNTIES...

AT 919 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 BELLEPLAIN FOREST...OR 11 MILES SOUTHEAST OF
MILLVILLE...MOVING EAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  BELLEPLAIN FOREST AND ELDORA BY 925 PM EDT...
  DENNISVILLE BY 935 PM EDT...
  WOODBINE...DENNISVILLE AND CORBIN CITY BY 940 PM EDT...
  SEAVILLE BY 955 PM EDT...
  STRATHMERE AND SEA ISLE CITY BY 1000 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.

&&

LAT...LON 3936 7440 3930 7455 3898 7481 3905 7493
      3911 7490 3916 7492 3918 7503 3920 7505
      3922 7508 3925 7509 3928 7509 3932 7511
      3941 7508 3943 7502 3946 7495 3937 7448
      3934 7452 3937 7447
TIME...MOT...LOC 0120Z 285DEG 18KT 3927 7491

$$
 
TFG

789 
WWUS51 KPHI 080143
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
943 PM EDT THU JUL 7 2011

NJC011-080153-
/O.CAN.KPHI.SV.W.0157.000000T0000Z-110708T0200Z/
CUMBERLAND NJ-
943 PM EDT THU JUL 7 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CUMBERLAND COUNTY
IS CANCELLED...

LAT...LON 3936 7440 3930 7455 3898 7481 3905 7493
      3911 7490 3916 7492 3917 7491 3917 7490
      3925 7489 3926 7488 3927 7486 3931 7486
      3933 7486 3935 7485 3936 7485 3943 7481
      3937 7448 3934 7452 3937 7447
TIME...MOT...LOC 0143Z 285DEG 18KT 3924 7477

$$

NJC001-009-080200-
/O.CON.KPHI.SV.W.0157.000000T0000Z-110708T0200Z/
CAPE MAY NJ-ATLANTIC NJ-
943 PM EDT THU JUL 7 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT
FOR SOUTHERN ATLANTIC AND CAPE MAY COUNTIES...

AT 940 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.
 THIS STORM WAS LOCATED NEAR WOODBINE...OR 18 MILES SOUTHEAST OF
MILLVILLE...MOVING EAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  9 MILES SOUTH OF ENGLISH CREEK BY 950 PM EDT...
  SEAVILLE AND SEA ISLE CITY BY 955 PM EDT...
  STRATHMERE...MARMORA...BEESLEYS POINT AND OCEAN CITY BY 1000 PM
  EDT...

LAT...LON 3936 7440 3930 7455 3898 7481 3905 7493
      3911 7490 3916 7492 3917 7491 3917 7490
      3925 7489 3926 7488 3927 7486 3931 7486
      3933 7486 3935 7485 3936 7485 3943 7481
      3937 7448 3934 7452 3937 7447
TIME...MOT...LOC 0143Z 285DEG 18KT 3924 7477

$$

NIERENBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 8:42 PM EDT	Special Marine Warning	PHI		2 hr
Jul 7, 10:07 PM EDT	Special Weather Statement	PHI	Cape May	53 min
Jul 7, 10:55 PM EDT	Severe Thunderstorm Warning	PHI	Warren	28 min
Jul 8, 3:58 AM EDT	Flash Flood Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	19 hr
Jul 8, 4:34 AM EDT	Special Weather Statement	PHI	Hunterdon	56 min
Jul 8, 12:03 PM EDT	Special Weather Statement	PHI	Atlantic	57 min
Jul 8, 12:56 PM EDT	Special Weather Statement	PHI	Atlantic, Camden, Gloucester	64 min
Jul 8, 2:12 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	93 min
Jul 8, 2:23 PM EDT	Special Weather Statement	PHI	Warren	82 min
Jul 8, 2:25 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	7 hr
Jul 8, 2:51 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Warren	54 min
Jul 8, 2:56 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer	3 hr
Jul 8, 3:03 PM EDT	Special Weather Statement	PHI	Mercer	57 min
Jul 8, 3:14 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset	66 min
Jul 8, 3:33 PM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex, Somerset	3 hr
Jul 8, 3:44 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	76 min
Jul 8, 3:48 PM EDT	Flash Flood Warning	PHI	Camden	3 hr
Jul 8, 3:51 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren	69 min
Jul 8, 4:10 PM EDT	Flash Flood Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	3 hr
Jul 8, 4:42 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	78 min
Jul 8, 4:50 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden	70 min
Jul 8, 5:03 PM EDT	Flash Flood Warning	PHI	Sussex	117 min
Jul 8, 5:03 PM EDT	Tornado Warning	PHI	Atlantic, Burlington, Camden	27 min
Jul 8, 5:33 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Mercer and 4 more	3 hr
Jul 8, 5:44 PM EDT	Flash Flood Warning	PHI	Camden, Gloucester, Salem	3 hr
Jul 8, 6:32 PM EDT	Special Marine Warning	PHI		58 min
Jul 8, 7:13 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Cape May, Cumberland, Ocean	77 min
Jul 8, 7:24 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Monmouth, Ocean	3 hr
Jul 8, 7:26 PM EDT	Special Marine Warning	PHI		64 min
Jul 8, 7:50 PM EDT	Special Marine Warning	PHI		55 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 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.