Alert archive / New Jersey / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 258, NWS Philadelphia/Mount Holly

August 18, 20114 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 18, 2011, 9:53 PM EDT for 4 counties in New Jersey. It was in force for 67 min. 1 report 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 18, 2011, 9:53 PM EDT (01:53 UTC)
Expired
Aug 18, 2011, 11:00 PM EDT
In force
67 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

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

The radar

The Dover AFB radar (KDOX), 60 km from the middle of the area, began a volume at 01:55 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

TimeReportWhereRemark
Aug 18, 10:20 PM EDTTSTM WND DMGBridgeton, NJTREES DOWN.

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, 1.9 hours before the alert went out and 158 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-pSkew-T log-p diagram, Wallops Is Stn, VA at 00:00Z on 2011-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 27 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 00:00Z on 2011-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
27 J/kg
Mixed-layer CIN
-177 J/kg
Mixed-layer LCL
1773 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
5 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.

801 
WUUS51 KPHI 190153
SVRPHI
NJC001-009-011-033-190300-
/O.NEW.KPHI.SV.W.0258.110819T0153Z-110819T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
953 PM EDT THU AUG 18 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 1100 PM EDT

* AT 948 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
  GREENWICH...OR 14 MILES WEST OF MILLVILLE...AND MOVING EAST AT 20
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CEDARVILLE AND FAIRTON AROUND 1005 PM EDT...
  NEWPORT AROUND 1010 PM EDT...
  DIVIDING CREEK AROUND 1025 PM EDT...
  MILLVILLE AROUND 1030 PM EDT...
  LAUREL LAKE AROUND 1035 PM EDT...
  MAURICETOWN AROUND 1040 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.

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 3921 7511 3922 7518 3929 7527 3928 7530
      3929 7532 3934 7534 3933 7537 3937 7541
      3938 7544 3947 7554 3950 7540 3952 7514
      3950 7486 3922 7483
TIME...MOT...LOC 0153Z 269DEG 17KT 3934 7529

$$

HEAVENER
1 follow-up statement
169 
WWUS51 KPHI 190231
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1031 PM EDT THU AUG 18 2011

NJC033-190241-
/O.CAN.KPHI.SV.W.0258.000000T0000Z-110819T0300Z/
SALEM NJ-
1031 PM EDT THU AUG 18 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN SALEM 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.

LAT...LON 3922 7483 3921 7511 3922 7518 3929 7527
      3928 7530 3929 7532 3934 7534 3933 7537
      3947 7536 3951 7528 3952 7518 3946 7509
      3947 7508 3951 7507 3950 7486
TIME...MOT...LOC 0231Z 269DEG 17KT 3934 7506

$$

NJC001-009-011-190300-
/O.CON.KPHI.SV.W.0258.000000T0000Z-110819T0300Z/
CUMBERLAND NJ-CAPE MAY NJ-ATLANTIC NJ-
1031 PM EDT THU AUG 18 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM EDT
FOR SOUTHWESTERN ATLANTIC...NORTH CENTRAL CAPE MAY AND CUMBERLAND
COUNTIES...

AT 1026 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 LAUREL LAKE...OR NEAR MILLVILLE...MOVING EAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  7 MILES SOUTH OF SOUTH VINELAND BY 1035 PM EDT...
  MAURICETOWN...6 MILES NORTH OF LEESBURG AND 8 MILES SOUTH OF
  VINELAND BY 1040 PM EDT...
  PORT ELIZABETH AND BRICKSBORO BY 1045 PM EDT...
  CUMBERLAND BY 1050 PM EDT...
  BELLEPLAIN FOREST BY 1100 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 3922 7483 3921 7511 3922 7518 3929 7527
      3928 7530 3929 7532 3934 7534 3933 7537
      3947 7536 3951 7528 3952 7518 3946 7509
      3947 7508 3951 7507 3950 7486
TIME...MOT...LOC 0231Z 269DEG 17KT 3934 7506

$$

IOVINO

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 8:11 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester64 min
Aug 18, 8:26 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester112 min
Aug 18, 8:31 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer59 min
Aug 18, 8:48 PM EDTSpecial Weather StatementPHIWarren57 min
Aug 18, 8:48 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean57 min
Aug 18, 8:59 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex, Warren61 min
Aug 18, 9:48 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Morris, Somerset, Warren57 min
Aug 18, 9:57 PM EDTSevere Thunderstorm WarningPHIMorris43 min
Aug 19, 12:19 AM EDTSpecial Marine WarningPHI26 min
Aug 19, 12:19 AM EDTSpecial Weather StatementPHICape May41 min
Aug 19, 12:50 AM EDTSpecial Weather StatementPHICumberland, Salem40 min
Aug 19, 1:14 AM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Camden, Cumberland, Gloucester, Mercer and 1 more3 hr
Aug 19, 1:31 AM EDTSpecial Weather StatementPHICumberland, Gloucester, Salem59 min
Aug 19, 2:28 AM EDTSpecial Weather StatementPHICamden, Cumberland, Gloucester, Salem47 min
Aug 19, 2:48 AM EDTSpecial Weather StatementPHIMonmouth, Ocean57 min
Aug 19, 3:06 AM EDTAreal Flood AdvisoryPHIAtlantic, Cape May, Cumberland114 min
Aug 19, 3:21 AM EDTAreal Flood AdvisoryPHIMiddlesex, Monmouth, Ocean114 min
Aug 19, 6:24 AM EDTSpecial Weather StatementPHIMercer, Middlesex36 min
Aug 19, 6:37 AM EDTSpecial Weather StatementPHIMiddlesex23 min
Aug 19, 1:34 PM EDTSpecial Marine WarningPHI41 min
Aug 19, 2:39 PM EDTSpecial Marine WarningPHI96 min
Aug 19, 3:23 PM EDTSpecial Marine WarningPHI67 min
Aug 19, 4:05 PM EDTSpecial Weather StatementPHICamden55 min
Aug 19, 4:15 PM EDTSpecial Marine WarningPHI90 min
Aug 19, 4:29 PM EDTSevere Thunderstorm WarningPHIWarren61 min
Aug 19, 4:32 PM EDTAreal Flood AdvisoryPHISussex, Warren2 hr
Aug 19, 4:38 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden67 min
Aug 19, 4:42 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester, Salem4 hr
Aug 19, 5:12 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Sussex, Warren78 min
Aug 19, 5:27 PM EDTAreal Flood AdvisoryPHIMonmouth, Ocean111 min
Aug 19, 5:29 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean50 min
Aug 19, 5:47 PM EDTSpecial Marine WarningPHI118 min
Aug 19, 5:49 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer, Middlesex, Morris, Somerset104 min
Aug 19, 5:59 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Morris, Somerset80 min
Aug 19, 6:14 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester, Mercer, Salem65 min
Aug 19, 6:24 PM EDTSevere Thunderstorm WarningPHIMorris28 min
Aug 19, 6:54 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth31 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2011Every 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.