Alert archive / New Jersey / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 229, NWS Philadelphia/Mount Holly

August 10, 2008Camden County, Gloucester County, Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 10, 2008, 3:33 PM EDT for Camden County, Gloucester County, Salem County, New Jersey. It was in force for 39 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 10, 2008, 3:33 PM EDT (19:33 UTC)
Expired: Aug 10, 2008, 4:12 PM EDT
In force: 39 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Camden County, NJ, Gloucester County, NJ, Salem County, NJ

The radar

The Philadelphia radar (KDIX), 63 km from the middle of the area, began a volume at 19:34 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 watch it was issued in

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

Issued	Product	Office	Lasted
Aug 10, 10:46 AM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 7.6 hours before the alert went out and 196 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: 2296 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 709 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 4.9

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 101933
SVRPHI
NJC007-015-033-102030-
/O.NEW.KPHI.SV.W.0229.080810T1933Z-080810T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
333 PM EDT SUN AUG 10 2008

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  CENTRAL GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
  EAST CENTRAL SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 430 PM EDT

* AT 329 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  ELMER...OR ABOUT 13 MILES NORTHWEST OF VINELAND...AND MOVING
  NORTHEAST AT 17 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CLAYTON AND GLASSBORO BY 345 PM...
  WILLIAMSTOWN AND VICTORY LAKES BY 405 PM...
  7 MILES SOUTHEAST OF BERLIN BY 425 PM...
  CHESILHURST BY 430 PM...

THUNDERSTORMS ARE CAPABLE OF PRODUCING HEAVY RAINFALL WHICH MAY
RESULT IN LOCALIZED AREAS OF FLOODING. DO NOT DRIVE IN AREAS WHERE
WATER IS CROSSING THE ROAD.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM SUNDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
EASTERN PENNSYLVANIA.

LAT...LON 3981 7495 3972 7477 3959 7494 3956 7514
      3956 7528 3962 7529
TIME...MOT...LOC 1933Z 247DEG 15KT 3962 7514

$$

RNS

1 follow-up statement

000 
WWUS51 KPHI 102012
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
412 PM EDT SUN AUG 10 2008

NJC007-015-033-102022-
/O.CAN.KPHI.SV.W.0229.000000T0000Z-080810T2030Z/
SALEM NJ-CAMDEN NJ-GLOUCESTER NJ-
412 PM EDT SUN AUG 10 2008

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL GLOUCESTER...
SOUTHEASTERN CAMDEN AND EAST CENTRAL SALEM COUNTIES IS CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT SUNDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
EASTERN PENNSYLVANIA.

LAT...LON 3981 7496 3972 7477 3959 7494 3956 7514
      3956 7528 3962 7529
TIME...MOT...LOC 2012Z 247DEG 15KT 3968 7495

$$

RNS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 9:48 AM EDT	Special Marine Warning	PHI		57 min
Aug 10, 9:55 AM EDT	Severe Thunderstorm Warning	PHI	Cape May	46 min
Aug 10, 10:11 AM EDT	Severe Thunderstorm Warning	PHI	Salem	64 min
Aug 10, 10:39 AM EDT	Severe Thunderstorm Warning	PHI	Gloucester	66 min
Aug 10, 11:17 AM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	58 min
Aug 10, 11:32 AM EDT	Areal Flood Advisory	PHI	Camden, Gloucester	3 hr
Aug 10, 11:46 AM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	59 min
Aug 10, 11:55 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester	65 min
Aug 10, 11:56 AM EDT	Flash Flood Warning	PHI	Camden, Gloucester	4 hr
Aug 10, 12:05 PM EDT	Special Marine Warning	PHI		55 min
Aug 10, 12:09 PM EDT	Tornado Warning	PHI	Gloucester, Salem	36 min
Aug 10, 12:40 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester, Salem	95 min
Aug 10, 12:45 PM EDT	Severe Thunderstorm Warning	PHI	Cape May	60 min
Aug 10, 12:51 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Ocean	84 min
Aug 10, 12:56 PM EDT	Tornado Warning	PHI	Gloucester, Salem	34 min
Aug 10, 1:05 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	115 min
Aug 10, 1:22 PM EDT	Flash Flood Warning	PHI	Gloucester, Salem	3 hr
Aug 10, 1:29 PM EDT	Tornado Warning	PHI	Camden, Gloucester, Salem	28 min
Aug 10, 1:53 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	67 min
Aug 10, 2:10 PM EDT	Severe Thunderstorm Warning	PHI	Ocean	50 min
Aug 10, 2:23 PM EDT	Special Marine Warning	PHI		67 min
Aug 10, 2:36 PM EDT	Special Marine Warning	PHI		54 min
Aug 10, 2:50 PM EDT	Severe Thunderstorm Warning	PHI	Burlington	55 min
Aug 10, 3:44 PM EDT	Special Marine Warning	PHI		61 min
Aug 10, 3:46 PM EDT	Severe Thunderstorm Warning	PHI	Ocean	24 min
Aug 10, 4:10 PM EDT	Areal Flood Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Ocean, Salem	3 hr
Aug 10, 6:36 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester, Salem	69 min
Aug 10, 6:45 PM EDT	Areal Flood Advisory	PHI	Camden, Gloucester, Salem	2 hr
Aug 10, 7:04 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May	56 min
Aug 10, 7:09 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	66 min
Aug 10, 7:15 PM EDT	Special Marine Warning	PHI		60 min
Aug 10, 7:42 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland	56 min
Aug 10, 7:45 PM EDT	Special Marine Warning	PHI		60 min
Aug 10, 7:53 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester	67 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2008 Every severe thunderstorm warning in 2008

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.