Alert archive / New Jersey / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 152, NWS Philadelphia/Mount Holly

August 3, 2012Cumberland County, Salem County, New Jersey; Kent County, New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 3, 2012, 4:17 PM EDT for Cumberland County, Salem County, New Jersey; Kent County, New Castle County, Delaware. It was in force for 58 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: Aug 3, 2012, 4:17 PM EDT (20:17 UTC)
Expired: Aug 3, 2012, 5:15 PM EDT
In force: 58 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), 63 km from the middle of the area, began a volume at 20:15 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
Aug 3, 4:30 PM EDT	TSTM WND DMG	Blackbird, DE	WIRES DOWN.
Aug 3, 4:35 PM EDT	HAIL 0.88	Townsend, DE

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, 8.3 hours before the alert went out and 54 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: 1112 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 961 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 37 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.

954 
WUUS51 KPHI 032017
SVRPHI
DEC001-003-NJC011-033-032115-
/O.NEW.KPHI.SV.W.0152.120803T2017Z-120803T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
417 PM EDT FRI AUG 3 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...
  WEST CENTRAL CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
  SOUTHWESTERN SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 515 PM EDT

* AT 414 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
  GREEN SPRING...OR 10 MILES SOUTHEAST OF MIDDLETOWN...AND MOVING
  NORTHEAST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WOODLAND BEACH AROUND 450 PM EDT...
  7 MILES SOUTHEAST OF HOPE CREEK AROUND 500 PM EDT...
  NEWPORT MEADOWS...GREENWICH AND 7 MILES SOUTH OF HANCOCKS BRIDGE
  AROUND 515 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...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! 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 3946 7558 3942 7553 3943 7550 3947 7555
      3954 7541 3933 7523 3931 7533 3934 7534
      3935 7539 3943 7548 3942 7552 3940 7552
      3932 7543 3929 7543 3925 7563 3938 7573
TIME...MOT...LOC 2018Z 243DEG 9KT 3934 7560

$$

HEAVENER

1 follow-up statement

652 
WWUS51 KPHI 032102
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
502 PM EDT FRI AUG 3 2012

DEC001-003-NJC011-033-032115-
/O.CON.KPHI.SV.W.0152.000000T0000Z-120803T2115Z/
NEW CASTLE DE-KENT DE-SALEM NJ-CUMBERLAND NJ-
502 PM EDT FRI AUG 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR WEST CENTRAL CUMBERLAND...SOUTHWESTERN SALEM...NORTH CENTRAL KENT
AND SOUTHEASTERN NEW CASTLE COUNTIES...

AT 501 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 WOODLAND BEACH...OR 14 MILES EAST OF MIDDLETOWN...MOVING
NORTHEAST AT 10 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  NEWPORT MEADOWS...GREENWICH AND 7 MILES SOUTH OF HANCOCKS BRIDGE BY
  515 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 3928 7549 3932 7563 3938 7573 3946 7558
      3942 7553 3943 7550 3947 7555 3954 7541
      3933 7523 3931 7533 3934 7534 3935 7539
      3943 7548 3942 7552 3940 7552 3932 7543
      3929 7543 3928 7546
TIME...MOT...LOC 2103Z 243DEG 9KT 3939 7547

$$

HEAVENER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 3:38 PM EDT	Special Weather Statement	PHI	Burlington	67 min
Aug 3, 4:21 PM EDT	Special Marine Warning	PHI		84 min
Aug 3, 4:35 PM EDT	Special Weather Statement	PHI	Monmouth	55 min
Aug 3, 4:45 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	60 min
Aug 3, 5:12 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester	63 min
Aug 3, 5:35 PM EDT	Special Weather Statement	PHI	Mercer	55 min
Aug 3, 5:42 PM EDT	Special Weather Statement	PHI	Mercer	63 min
Aug 3, 5:46 PM EDT	Areal Flood Advisory	PHI	Gloucester	101 min
Aug 3, 5:55 PM EDT	Special Weather Statement	PHI	Burlington	65 min
Aug 3, 6:20 PM EDT	Areal Flood Advisory	PHI	Burlington, Mercer	2 hr
Aug 3, 6:23 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer	43 min
Aug 3, 2:58 PM EDT	Special Weather Statement	PHI	Sussex	62 min
Aug 3, 3:57 PM EDT	Special Weather Statement	PHI	New Castle	63 min
Aug 3, 4:14 PM EDT	Areal Flood Advisory	PHI	Kent, New Castle	3 hr
Aug 3, 4:58 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	40 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.