Alert archive / New Jersey / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 120, NWS Philadelphia/Mount Holly

July 24, 2012Cape May County, Cumberland County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 24, 2012, 3:40 PM EDT for Cape May County, Cumberland County, New Jersey. It was in force for 65 min. 4 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 24, 2012, 3:40 PM EDT (19:40 UTC)
Expired: Jul 24, 2012, 4:45 PM EDT
In force: 65 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Cape May County, NJ, Cumberland County, NJ

The radar

The Dover AFB radar (KDOX), 61 km from the middle of the area, began a volume at 19:40 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 24, 3:45 PM EDT	MARINE TSTM WIND 48	Bivalve, NJ
Jul 24, 4:15 PM EDT	HAIL 0.5	Cape May Court House, NJ
Jul 24, 4:15 PM EDT	HAIL 0.75	Cape May Court House, NJ
Jul 24, 4:25 PM EDT	TSTM WND DMG	Cape May Court House, NJ	TREES AND POWER LINES DOWN

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

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.7 hours before the alert went out and 111 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: 1097 J/kg
Mixed-layer CIN: -174 J/kg
Mixed-layer LCL: 1128 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 225 m²/s²
0-3 km storm-relative helicity: 264 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.

161 
WUUS51 KPHI 241940
SVRPHI
NJC009-011-242045-
/O.NEW.KPHI.SV.W.0120.120724T1940Z-120724T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
340 PM EDT TUE JUL 24 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL CAPE MAY COUNTY IN SOUTHERN NEW JERSEY...
  SOUTHEASTERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 445 PM EDT

* AT 335 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
  PORT NORRIS...OR 8 MILES SOUTH OF MILLVILLE...AND MOVING SOUTHEAST
  AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ELDORA AROUND 350 PM EDT...
  GOSHEN...DENNISVILLE AND 6 MILES SOUTHWEST OF WOODBINE AROUND 355
  PM EDT...
  CAPE MAY COURT HOUSE AROUND 400 PM EDT...
  SCOTCH BONNET AND AVALON AROUND 405 PM EDT...
  STONE HARBOR AND NORTH WILDWOOD AROUND 410 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...LARGE 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...HEAVY RAIN WILL OCCUR
WITH THESE STORMS AND CAUSE LOW-LYING AND POOR DRAINAGE FLOODING.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
TUESDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
SOUTHEAST PENNSYLVANIA.

&&

LAT...LON 3917 7467 3913 7470 3910 7470 3899 7478
      3896 7482 3907 7493 3911 7490 3916 7490
      3919 7503 3921 7504 3920 7507 3927 7514
      3934 7508 3920 7464
TIME...MOT...LOC 1940Z 312DEG 36KT 3924 7501

$$

NIERENBERG

1 follow-up statement

557 
WWUS51 KPHI 242012
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
412 PM EDT TUE JUL 24 2012

NJC011-242022-
/O.CAN.KPHI.SV.W.0120.000000T0000Z-120724T2045Z/
CUMBERLAND NJ-
412 PM EDT TUE JUL 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CUMBERLAND 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
TUESDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
SOUTHEAST PENNSYLVANIA.

LAT...LON 3907 7493 3911 7490 3915 7490 3919 7492
      3926 7489 3919 7466 3913 7470 3910 7470
      3901 7478 3899 7478 3897 7482 3897 7483
TIME...MOT...LOC 2012Z 312DEG 36KT 3914 7484

$$

NJC009-242045-
/O.CON.KPHI.SV.W.0120.000000T0000Z-120724T2045Z/
CAPE MAY NJ-
412 PM EDT TUE JUL 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR CENTRAL CAPE MAY COUNTY...

AT 410 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 GOSHEN...OR 15 MILES NORTH OF CAPE MAY...MOVING
SOUTHEAST AT 40 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  6 MILES NORTHEAST OF WHITESBORO-BURLEIGH BY 415 PM EDT...
  AVALON...SCOTCH BONNET...CAPE MAY COURT HOUSE AND SEA ISLE CITY BY
  420 PM EDT...
  STONE HARBOR...NORTH WILDWOOD...7 MILES NORTHEAST OF WEST WILDWOOD
  AND 7 MILES NORTHEAST OF WILDWOOD BY 425 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
TUESDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
SOUTHEAST PENNSYLVANIA.

&&

LAT...LON 3907 7493 3911 7490 3915 7490 3919 7492
      3926 7489 3919 7466 3913 7470 3910 7470
      3901 7478 3899 7478 3897 7482 3897 7483
TIME...MOT...LOC 2012Z 312DEG 36KT 3914 7484

$$

NIERENBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 8:56 PM EDT	Special Weather Statement	PHI	Morris	94 min
Jul 24, 3:23 AM EDT	Small Craft Advisory	PHI		37 hr
Jul 24, 2:20 PM EDT	Special Marine Warning	PHI		85 min
Jul 24, 2:30 PM EDT	Special Weather Statement	PHI	Gloucester, Salem	90 min
Jul 24, 3:17 PM EDT	Special Weather Statement	PHI	Atlantic, Cumberland	88 min
Jul 24, 3:43 PM EDT	Special Marine Warning	PHI		92 min
Jul 24, 5:16 PM EDT	Special Weather Statement	PHI	Cumberland, Salem	59 min
Jul 24, 5:27 PM EDT	Special Weather Statement	PHI	Atlantic, Gloucester	93 min
Jul 24, 5:31 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	59 min
Jul 24, 6:01 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland, Gloucester, Salem	45 min
Jul 24, 7:45 PM EDT	Special Weather Statement	PHI	Monmouth	30 min
Jul 24, 7:46 PM EDT	Special Marine Warning	PHI		59 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2012 Every severe thunderstorm warning in 2012

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.