Alert archive / New Jersey / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 238, NWS Philadelphia/Mount Holly

August 10, 2008Cumberland County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 10, 2008, 7:42 PM EDT for Cumberland County, New Jersey. It was in force for 56 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 10, 2008, 7:42 PM EDT (23:42 UTC)
Expired: Aug 10, 2008, 8:38 PM EDT
In force: 56 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

County Cumberland County, NJ

The radar

The Dover AFB radar (KDOX), 67 km from the middle of the area, began a volume at 23:41 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 10, 7:50 PM EDT	HAIL 0.88	2 Ne Bridgeton, NJ	HAIL OCCURRED IN UPPER DEERFIELD TOWNSHIP.
Aug 10, 7:57 PM EDT	HAIL 0.75	Rosenhayn, NJ

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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, 11.7 hours before the alert went out and 164 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 102342
SVRPHI
NJC011-110100-
/O.NEW.KPHI.SV.W.0238.080810T2342Z-080811T0100Z/

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 900 PM EDT

* AT 735 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 10
  MILES WEST OF GREENWICH...OR ABOUT 12 MILES SOUTHEAST OF
  MIDDLETOWN...AND MOVING EAST AT 18 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GREENWICH BY 805 PM...
  SHILOH BY 815 PM...
  BRIDGETON BY 825 PM...
  FAIRTON AND CEDARVILLE BY 830 PM...
  MILLVILLE BY 855 PM...

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 900 PM SUNDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW
JERSEY.

LAT...LON 3931 7489 3928 7530 3930 7533 3934 7534
      3933 7537 3936 7541 3941 7543 3942 7541
      3945 7542 3951 7517 3945 7508 3953 7506
      3954 7503 3944 7494
TIME...MOT...LOC 2342Z 268DEG 16KT 3938 7548

$$

RNS

1 follow-up statement

000 
WWUS51 KPHI 110038
SVSPHI

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

NJC011-110049-
/O.CAN.KPHI.SV.W.0238.000000T0000Z-080811T0100Z/
CUMBERLAND NJ-
839 PM EDT SUN AUG 10 2008

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

THE SEVERE THUNDERSTORM HAS MOVED AWAY FROM THE AFFECTED AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SUNDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW
JERSEY.

LAT...LON 3931 7489 3928 7530 3930 7533 3934 7534
      3933 7537 3936 7541 3941 7543 3942 7541
      3945 7542 3951 7517 3945 7508 3953 7506
      3954 7503 3944 7494
TIME...MOT...LOC 0039Z 268DEG 16KT 3939 7515

$$

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, 3:33 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester, Salem	39 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, 7:45 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.