Alert archive / New Jersey / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 237, NWS Philadelphia/Mount Holly

September 22, 2012Cumberland County, Salem County, New Jersey; Kent County, New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 22, 2012, 8:44 PM EDT for Cumberland County, Salem County, New Jersey; Kent County, New Castle County, Delaware. It was in force for 61 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: Sep 22, 2012, 8:44 PM EDT (00:44 UTC)
Expired: Sep 22, 2012, 9:45 PM EDT
In force: 61 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Kent County, DE, New Castle County, DE, Cumberland County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 61 km from the middle of the area, began a volume at 00:34 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

Wallops Is Stn, VA (KWAL), launched 00:00Z, 0.7 hours before the alert went out and 160 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: 399 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 1012 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 123 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

930 
WUUS51 KPHI 230044
SVRPHI
DEC001-003-NJC011-033-230145-
/O.NEW.KPHI.SV.W.0237.120923T0044Z-120923T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
844 PM EDT SAT SEP 22 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL KENT COUNTY IN CENTRAL DELAWARE...
  SOUTHEASTERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  NORTHERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITIES OF...VINELAND...MILLVILLE...BRIDGETON...
  SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 945 PM EDT

* AT 839 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS TO
  60 MPH.  THIS STORM WAS LOCATED NEAR GREEN SPRING...OR 13 MILES
  NORTHWEST OF DOVER...AND MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WOODLAND BEACH AROUND 855 PM EDT...
  GREENWICH AND NEWPORT MEADOWS AROUND 905 PM EDT...
  BRIDGETON...SHILOH AND FAIRTON AROUND 915 PM EDT...
  SEABROOK FARMS AROUND 920 PM EDT...
  ROSENHAYN AND OLIVET AROUND 925 PM EDT...
  ROSENHAYN AROUND 930 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.

THIS SEVERE THUNDERSTORM MAY CONTAIN LITTLE OR NO LIGHTNING. DO NOT
WAIT TO HEAR THUNDER BEFORE TAKING COVER. SEEK SHELTER IMMEDIATELY
INSIDE A STURDY STRUCTURE AND STAY 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 3939 7488 3930 7532 3934 7534 3935 7539
      3943 7547 3945 7553 3944 7555 3937 7551
      3932 7543 3928 7541 3922 7566 3937 7574
      3951 7557 3946 7558 3944 7555 3953 7554
      3970 7533 3968 7527
TIME...MOT...LOC 0044Z 249DEG 31KT 3934 7559

$$
 
TFG

2 follow-up statements

898 
WWUS51 KPHI 230105
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
905 PM EDT SAT SEP 22 2012

DEC001-003-230114-
/O.CAN.KPHI.SV.W.0237.000000T0000Z-120923T0145Z/
NEW CASTLE DE-KENT DE-
905 PM EDT SAT SEP 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL KENT AND
SOUTHEASTERN NEW CASTLE COUNTIES IS CANCELLED...

THE SEVERE THUNDERSTORM HAS MOVED INTO NEW JERSEY.

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 3930 7532 3934 7534 3935 7539 3943 7547
      3946 7554 3952 7554 3954 7553 3970 7533
      3969 7531 3968 7527 3939 7488
TIME...MOT...LOC 0104Z 249DEG 31KT 3942 7540

$$

NJC011-033-230145-
/O.CON.KPHI.SV.W.0237.000000T0000Z-120923T0145Z/
SALEM NJ-CUMBERLAND NJ-
905 PM EDT SAT SEP 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM EDT
FOR NORTHERN CUMBERLAND AND SALEM COUNTIES...

AT 900 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS 
TO 60 MPH.  THIS STORM WAS LOCATED NEAR NEWPORT MEADOWS...OR
11 MILES WEST OF BRIDGETON...MOVING EAST AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  GREENWICH BY 910 PM EDT...
  SHILOH BY 915 PM EDT...
  SEABROOK FARMS AND BRIDGETON BY 920 PM EDT...
  SEABROOK FARMS AND CENTERTON BY 925 PM EDT...
  ROSENHAYN...CENTERTON AND OLIVET BY 930 PM EDT...
  SOUTH VINELAND BY 935 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS SEVERE THUNDERSTORM MAY CONTAIN LITTLE OR NO LIGHTNING. DO NOT
WAIT FOR THUNDER BEFORE TAKING COVER. SEEK SHELTER IMMEDIATELY INSIDE
A STURDY STRUCTURE AND STAY 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 3930 7532 3934 7534 3935 7539 3943 7547
      3946 7554 3952 7554 3954 7553 3970 7533
      3969 7531 3968 7527 3939 7488
TIME...MOT...LOC 0104Z 249DEG 31KT 3942 7540

$$

TFG

205 
WWUS51 KPHI 230141
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
941 PM EDT SAT SEP 22 2012

NJC011-033-230150-
/O.EXP.KPHI.SV.W.0237.000000T0000Z-120923T0145Z/
SALEM NJ-CUMBERLAND NJ-
941 PM EDT SAT SEP 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CUMBERLAND AND SALEM
COUNTIES WILL EXPIRE AT 945 PM EDT...

THE STORM IS MOVING OUT OF THE COUNTIES AND IS WEAKENING.

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 3930 7532 3934 7534 3935 7539 3943 7547
      3946 7554 3952 7554 3954 7553 3970 7533
      3969 7531 3968 7527 3939 7488
TIME...MOT...LOC 0140Z 249DEG 31KT 3953 7502

$$
 
TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 22, 8:06 PM EDT	Special Weather Statement	PHI	Morris	39 min
Sep 22, 8:15 PM EDT	Special Weather Statement	PHI	Gloucester, Salem	60 min
Sep 22, 8:17 PM EDT	Special Marine Warning	PHI		58 min
Sep 22, 8:28 PM EDT	Special Weather Statement	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	92 min
Sep 22, 8:49 PM EDT	Special Marine Warning	PHI		41 min
Sep 22, 10:11 PM EDT	Special Weather Statement	PHI	Ocean	64 min
Sep 22, 10:27 PM EDT	Special Weather Statement	PHI	Atlantic, Cumberland	63 min
Sep 22, 11:37 PM EDT	Special Weather Statement	PHI	Atlantic	53 min
Sep 22, 11:46 PM EDT	Special Marine Warning	PHI		59 min
Sep 22, 10:52 PM EDT	Special Weather Statement	PHI	Sussex	53 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2012 Severe Thunderstorm Warnings in Delaware, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.