Alert archive / New Jersey / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 295, NWS Philadelphia/Mount Holly

August 25, 2011Atlantic County, Burlington County, Ocean County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 25, 2011, 6:41 PM EDT for Atlantic County, Burlington County, Ocean County, New Jersey. It was in force for 49 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: Aug 25, 2011, 6:41 PM EDT (22:41 UTC)
Expired: Aug 25, 2011, 7:30 PM EDT
In force: 49 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Atlantic County, NJ, Burlington County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 48 km from the middle of the area, began a volume at 22:44 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 12:00Z, 10.7 hours before the alert went out and 196 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: 285 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 763 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 222 m²/s²
0-3 km storm-relative helicity: 282 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

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

232 
WUUS51 KPHI 252241
SVRPHI
NJC001-005-029-252330-
/O.NEW.KPHI.SV.W.0295.110825T2241Z-110825T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
641 PM EDT THU AUG 25 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN ATLANTIC COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF ATLANTIC CITY...
  SOUTHEASTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  SOUTH CENTRAL OCEAN COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 730 PM EDT

* AT 639 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM EGG HARBOR CITY TO POMONA TO
  ENGLISH CREEK...OR ALONG A LINE EXTENDING FROM 15 MILES NORTHWEST
  OF ATLANTIC CITY TO 12 MILES NORTHWEST OF ATLANTIC CITY TO 11 MILES
  WEST OF ATLANTIC CITY...AND MOVING EAST AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WADING RIVER...NORTHFIELD...LONGPORT...PORT REPUBLIC...NEW
  GRETNA...MARGATE CITY...PLEASANTVILLE...ABSECON...VENTNOR CITY...
  BASS RIVER STATE FOREST...TUCKERTON...BRIGANTINE...BEACH HAVEN
  WEST...BEACH HAVEN...NORTH BEACH HAVEN...SURF CITY AND HARVEY
  CEDARS

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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 3951 7426 3950 7433 3953 7434 3953 7440
      3949 7438 3949 7432 3947 7429 3945 7429
      3936 7440 3931 7449 3929 7468 3942 7474
      3962 7460 3970 7418 3968 7416 3971 7413
      3970 7413
TIME...MOT...LOC 2241Z 256DEG 30KT 3956 7454 3944 7462
          3934 7462

$$
 
TFG

1 follow-up statement

172 
WWUS51 KPHI 252303
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
703 PM EDT THU AUG 25 2011

NJC001-005-029-252330-
/O.CON.KPHI.SV.W.0295.000000T0000Z-110825T2330Z/
OCEAN NJ-ATLANTIC NJ-BURLINGTON NJ-
703 PM EDT THU AUG 25 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR SOUTHEASTERN BURLINGTON...EASTERN ATLANTIC AND SOUTH CENTRAL
OCEAN COUNTIES...

AT 701 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF
BALL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM MYSTIC ISLAND TO
ABSECON TO MARGATE CITY...OR ALONG A LINE EXTENDING FROM 14 MILES
NORTH OF ATLANTIC CITY TO 6 MILES NORTHWEST OF ATLANTIC CITY TO
ATLANTIC CITY...MOVING EAST AT 20 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO VENTNOR
CITY...TUCKERTON...BRIGANTINE...BEACH HAVEN WEST...BEACH HAVEN...
NORTH BEACH HAVEN...SURF CITY AND SHIP BOTTOM

A SECOND STRONG THUNDERSTORM IS ALSO ABOUT TO ENTER THE WARNING AREA
FROM BUENA VISTA TOWNSHIP.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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.

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 3951 7426 3950 7433 3953 7434 3953 7440
      3949 7438 3949 7432 3947 7429 3945 7429
      3936 7440 3931 7449 3929 7468 3942 7474
      3962 7460 3970 7418 3968 7416 3971 7413
      3970 7413
TIME...MOT...LOC 2302Z 283DEG 19KT 3956 7441 3944 7450
          3934 7450

$$

TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 8:42 AM EDT	Special Weather Statement	PHI	Warren	63 min
Aug 25, 10:00 AM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 5 more	3 hr
Aug 25, 11:50 AM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Mercer and 4 more	3 hr
Aug 25, 1:36 PM EDT	Special Marine Warning	PHI		24 min
Aug 25, 2:42 PM EDT	Special Weather Statement	PHI	Atlantic, Cape May	3 hr
Aug 25, 3:12 PM EDT	Special Marine Warning	PHI		63 min
Aug 25, 4:36 PM EDT	Flood Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	68 hr
Aug 25, 4:41 PM EDT	Special Weather Statement	PHI	Camden, Gloucester, Salem	94 min
Aug 25, 5:17 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	118 min
Aug 25, 5:26 PM EDT	Hurricane Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 4 more	25 hr
Aug 25, 5:26 PM EDT	Tropical Storm Watch	PHI	Hunterdon, Mercer, Morris, Somerset	25 hr
Aug 25, 5:53 PM EDT	Flash Flood Warning	PHI	Cumberland	3 hr
Aug 25, 6:19 PM EDT	Special Weather Statement	PHI	Atlantic, Cape May, Cumberland	116 min
Aug 25, 6:43 PM EDT	Special Marine Warning	PHI		92 min
Aug 25, 6:47 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Gloucester, Salem	118 min
Aug 25, 6:55 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Ocean	3 hr
Aug 25, 7:26 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Cumberland, Gloucester, Salem	2 hr
Aug 25, 7:56 PM EDT	Special Marine Warning	PHI		94 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.