Alert archive / New Jersey / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 156, NWS Philadelphia/Mount Holly

July 29, 2009Cumberland County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 29, 2009, 6:11 PM EDT for Cumberland County, New Jersey. It was in force for 26 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
Jul 29, 2009, 6:11 PM EDT (22:11 UTC)
Expired
Jul 29, 2009, 6:37 PM EDT
In force
26 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

County Cumberland County, NJ

The radar

The Dover AFB radar (KDOX), 55 km from the middle of the area, began a volume at 22:13 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 29, 12:49 PM EDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.2 hours before the alert went out and 85 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, Phillips Aaf/Abe, MD at 12:00Z on 2009-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1577 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, Phillips Aaf/Abe, MD at 12:00Z on 2009-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.193958Sfc1 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
1577 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
745 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.3

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 292211
SVRPHI
NJC011-292300-
/O.NEW.KPHI.SV.W.0156.090729T2211Z-090729T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
611 PM EDT WED JUL 29 2009

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF MILLVILLE...

* UNTIL 700 PM EDT

* AT 609 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM GREENWICH TO 14 MILES SOUTH OF BIVALVE...OR ALONG A LINE
  EXTENDING FROM 13 MILES WEST OF MILLVILLE TO 9 MILES NORTHWEST OF
  CAPE MAY...AND MOVING NORTHEAST AT 30 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  BRIDGETON AROUND 620 PM EDT...
  BIVALVE...PORT NORRIS AND 6 MILES SOUTH OF SEABROOK FARMS AROUND
  625 PM EDT...
  ROSENHAYN...LAUREL LAKE AND MILLVILLE AROUND 630 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
WEDNESDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 3917 7494 3918 7503 3920 7505 3917 7514
      3920 7519 3923 7518 3926 7524 3929 7527
      3928 7530 3929 7532 3940 7541 3953 7522
      3933 7488
TIME...MOT...LOC 2211Z 244DEG 26KT 3938 7529 3904 7501

$$

EBERWINE
1 follow-up statement
000 
WWUS51 KPHI 292237
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
637 PM EDT WED JUL 29 2009

NJC011-292246-
/O.CAN.KPHI.SV.W.0156.000000T0000Z-090729T2300Z/
CUMBERLAND NJ-
637 PM EDT WED JUL 29 2009

...THE SEVERE THUNDERSTORM WARNING FOR CUMBERLAND COUNTY IS
CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
WEDNESDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND EASTERN PENNSYLVANIA.

SMALL HAIL TORRENTIAL RAINS AND INTENSE LIGHTNING WAS REPORTED
AS THE STORM PASSED THROUGH VINELAND MOVING INTO ATLANTIC 
EASTERN GLOUCESTER AND CAMDEN COUNTIES.. 

LAT...LON 3917 7494 3918 7503 3920 7505 3917 7514
      3920 7519 3923 7518 3926 7524 3929 7527
      3928 7530 3929 7532 3940 7541 3953 7522
      3933 7488
TIME...MOT...LOC 2236Z 244DEG 26KT 3946 7508 3912 7480

$$

EBERWINE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 29, 10:15 AM EDTFlash Flood WatchPHIHunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more17 hr
Jul 29, 12:55 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Somerset65 min
Jul 29, 1:30 PM EDTAreal Flood AdvisoryPHIMorris, Somerset3 hr
Jul 29, 1:35 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Somerset55 min
Jul 29, 1:56 PM EDTSevere Thunderstorm WarningPHISussex64 min
Jul 29, 2:10 PM EDTTornado WarningPHISussex65 min
Jul 29, 2:21 PM EDTAreal Flood AdvisoryPHIMiddlesex3 hr
Jul 29, 2:32 PM EDTFlash Flood WarningPHISussex6 hr
Jul 29, 2:50 PM EDTFlash Flood WarningPHIMiddlesex4 hr
Jul 29, 3:52 PM EDTFlash Flood WarningPHIMorris, Somerset4 hr
Jul 29, 5:09 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer66 min
Jul 29, 5:48 PM EDTSpecial Marine WarningPHI57 min
Jul 29, 5:55 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester, Mercer, Middlesex, Salem4 hr
Jul 29, 6:26 PM EDTSevere Thunderstorm WarningPHIAtlantic, Camden, Gloucester38 min
Jul 29, 6:42 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Camden, Cumberland, Gloucester, Mercer and 4 more3 hr
Jul 29, 6:42 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden39 min
Jul 29, 6:44 PM EDTFlash Flood WarningPHIMiddlesex, Somerset3 hr
Jul 29, 6:50 PM EDTAreal Flood AdvisoryPHIMorris94 min
Jul 29, 7:31 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth30 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2009Every severe thunderstorm warning in 2009

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.