Alert archive / New Jersey / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 190, NWS Philadelphia/Mount Holly

August 9, 20095 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 9, 2009, 7:21 PM EDT for 5 counties in New Jersey. It was in force for 69 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 9, 2009, 7:21 PM EDT (23:21 UTC)
Expired
Aug 9, 2009, 8:30 PM EDT
In force
69 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Atlantic County, NJ, Burlington County, NJ, Cape May County, NJ, Cumberland County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 71 km from the middle of the area, began a volume at 23:23 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
Aug 9, 3:18 PM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 11.4 hours before the alert went out and 171 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 12:00Z on 2009-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 721 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 12:00Z on 2009-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 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
721 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
814 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
134 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 092321
SVRPHI
NJC001-005-009-011-029-100030-
/O.NEW.KPHI.SV.W.0190.090809T2321Z-090810T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
721 PM EDT SUN AUG 9 2009

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 830 PM EDT

* AT 720 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 16 MILES NORTHWEST OF EGG HARBOR CITY TO 19 MILES WEST OF
  ELDORA...OR ALONG A LINE EXTENDING FROM 17 MILES NORTHEAST OF
  VINELAND TO 15 MILES SOUTHWEST OF MILLVILLE...AND MOVING SOUTHEAST
  AT 40 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  MAYS LANDING AROUND 745 PM EDT...
  ELDORA...BELLEPLAIN AND ESTELL MANOR AROUND 750 PM EDT...
  GOSHEN...ENGLISH CREEK...DENNISVILLE AND WOODBINE AROUND 755 PM
  EDT...
  NORTHFIELD AND GREEN CREEK AROUND 800 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE 
DURING ITS HISTORY FROM NORTHERN PENNSYLVANIA INTO SALEM COUNTY
NEW JERSEY. THIS IS A DANGEROUS SITUATION. SEEK SHELTER NOW 
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM TREES AND
WINDOWS

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SUNDAY EVENING FOR NORTHERN DELAWARE AND NORTHEAST MARYLAND AND NEW
JERSEY AND EASTERN PENNSYLVANIA. A SEVERE THUNDERSTORM WATCH ALSO
REMAINS IN EFFECT UNTIL 1100 PM EDT SUNDAY EVENING FOR SOUTHERN
DELAWARE AND NORTHEASTERN MARYLAND.

&&

LAT...LON 3950 7428 3953 7434 3953 7440 3949 7438
      3949 7432 3945 7429 3935 7441 3930 7455
      3920 7464 3907 7471 3902 7479 3899 7479
      3893 7488 3892 7497 3899 7498 3915 7490
      3920 7506 3975 7444 3966 7417 3964 7416
TIME...MOT...LOC 2320Z 334DEG 35KT 3969 7487 3924 7526

$$

TFG
1 follow-up statement
000 
WWUS51 KPHI 100014
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
814 PM EDT SUN AUG 9 2009

NJC005-011-029-100023-
/O.CAN.KPHI.SV.W.0190.000000T0000Z-090810T0030Z/
CUMBERLAND NJ-OCEAN NJ-BURLINGTON NJ-
814 PM EDT SUN AUG 9 2009

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BURLINGTON...
SOUTH CENTRAL OCEAN AND SOUTHEASTERN CUMBERLAND COUNTIES IS
CANCELLED...

THE SEVERE THUNDERSTORMS HAVE MOVED EAST OF THE AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SUNDAY EVENING FOR SOUTHERN NEW JERSEY. A SEVERE THUNDERSTORM WATCH
ALSO REMAINS IN EFFECT UNTIL 1100 PM EDT SUNDAY EVENING FOR SOUTHERN
DELAWARE AND NORTHEASTERN MARYLAND.

LAT...LON 3935 7441 3930 7455 3927 7458 3912 7470
      3907 7471 3902 7479 3899 7479 3893 7488
      3893 7498 3899 7498 3909 7491 3916 7490
      3921 7471 3946 7455 3947 7449 3944 7443
      3944 7432
TIME...MOT...LOC 0013Z 334DEG 35KT 3942 7449 3903 7477
          3894 7515

$$

NJC001-009-100030-
/O.CON.KPHI.SV.W.0190.000000T0000Z-090810T0030Z/
CAPE MAY NJ-ATLANTIC NJ-
814 PM EDT SUN AUG 9 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR SOUTHEASTERN ATLANTIC AND CAPE MAY COUNTIES...

AT 811 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS TO 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM ABSECON TO STONE HARBOR TO 11 MILES WEST OF CAPE MAY
POINT...OR ALONG A LINE EXTENDING FROM 6 MILES NORTHWEST OF ATLANTIC
CITY TO 10 MILES NORTHEAST OF CAPE MAY TO 14 MILES WEST OF CAPE
MAY...MOVING SOUTHEAST AT 40 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  ATLANTIC CITY...BRIGANTINE...VENTNOR CITY AND CAPE MAY POINT BY 820
  PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU SEE THREATENING WEATHER SEEK SHELTER INSIDE A STURDY 
STRUCTURE AND STAY AWAY FROM WINDOWS AND TREES

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SUNDAY EVENING FOR SOUTHERN NEW JERSEY. A SEVERE THUNDERSTORM WATCH
ALSO REMAINS IN EFFECT UNTIL 1100 PM EDT SUNDAY EVENING FOR SOUTHERN
DELAWARE AND NORTHEASTERN MARYLAND.

&&

LAT...LON 3935 7441 3930 7455 3927 7458 3912 7470
      3907 7471 3902 7479 3899 7479 3893 7488
      3893 7498 3899 7498 3909 7491 3916 7490
      3921 7471 3946 7455 3947 7449 3944 7443
      3944 7432
TIME...MOT...LOC 0013Z 334DEG 35KT 3942 7449 3903 7477
          3894 7515

$$

TFG

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 9:23 AM EDTAreal Flood AdvisoryPHICamden, Gloucester83 min
Aug 9, 10:33 AM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Ocean69 min
Aug 9, 11:57 AM EDTFlash Flood WatchPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more11 hr
Aug 9, 1:56 PM EDTExcessive Heat WarningPHIBurlington, Camden, Gloucester, Mercer30 hr
Aug 9, 1:56 PM EDTHeat AdvisoryPHIAtlantic, Burlington, Cape May, Cumberland, Hunterdon, Middlesex and 6 more30 hr
Aug 9, 6:10 PM EDTSevere Thunderstorm WarningPHICamden, Gloucester, Salem80 min
Aug 9, 6:20 PM EDTSpecial Marine WarningPHI115 min
Aug 9, 6:48 PM EDTSevere Thunderstorm WarningPHIAtlantic, Camden, Cumberland, Gloucester, Salem72 min
Aug 9, 7:33 PM EDTSpecial Marine WarningPHI87 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.