Alert archive / New Jersey / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 144, NWS Philadelphia/Mount Holly

July 23, 2008Cumberland County, Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 23, 2008, 2:44 PM EDT for Cumberland County, Salem County, New Jersey. It was in force for 46 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: Jul 23, 2008, 2:44 PM EDT (18:44 UTC)
Expired: Jul 23, 2008, 3:30 PM EDT
In force: 46 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Cumberland County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 70 km from the middle of the area, began a volume at 18:46 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
Jul 23, 3:06 PM EDT	TSTM WND DMG	Alloway, NJ	WIRES DOWN

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
Jul 23, 2:34 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.7 hours before the alert went out and 63 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: 1012 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 980 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: -61 m²/s²
0-3 km storm-relative helicity: -48 m²/s²
Significant tornado parameter: -0.4
Supercell composite: -7.5

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 231844
SVRPHI
NJC011-033-231930-
/O.NEW.KPHI.SV.W.0144.080723T1844Z-080723T1930Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
244 PM EDT WED JUL 23 2008

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 330 PM EDT

* AT 240 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 6 MILES
  WEST OF GREENWICH...AND MOVING NORTHEAST AT 23 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GREENWICH BY 250 PM...
  SHILOH AND BRIDGETON BY 305 PM...
  ALLOWAY BY 315 PM...
  SEABROOK FARMS BY 320 PM...
  OLIVET AND ROSENHAYN BY 325 PM...
  WOODSTOWN BY 330 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 1000 PM WEDNESDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
SOUTHEAST PENNSYLVANIA.

LAT...LON 3970 7539 3947 7502 3933 7533 3934 7534
      3933 7537 3937 7541 3938 7544 3942 7547
      3946 7553
TIME...MOT...LOC 1844Z 222DEG 20KT 3940 7544

$$

IOVINO

1 follow-up statement

000 
WWUS51 KPHI 231911
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
311 PM EDT WED JUL 23 2008

NJC011-033-231930-
/O.CON.KPHI.SV.W.0144.000000T0000Z-080723T1930Z/
SALEM NJ-CUMBERLAND NJ-
311 PM EDT WED JUL 23 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR NORTHWESTERN CUMBERLAND AND SALEM COUNTIES...

AT 310 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS 
LOCATED NEAR SHILOH...MOVING NORTHEAST AT 23 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  SEABROOK FARMS BY 320 PM EDT...
  OLIVET AND ROSENHAYN BY 325 PM EDT...
  WOODSTOWN BY 330 PM EDT...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
WEDNESDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND SOUTHEAST PENNSYLVANIA.

LAT...LON 3970 7539 3947 7502 3939 7535 3949 7548
TIME...MOT...LOC 1911Z 222DEG 20KT 3951 7531

$$

IOVINO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 3:02 AM EDT	Special Marine Warning	PHI		58 min
Jul 23, 3:51 AM EDT	Flash Flood Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	25 hr
Jul 23, 2:55 PM EDT	Severe Thunderstorm Warning	PHI	Mercer	35 min
Jul 23, 2:58 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	47 min
Jul 23, 3:26 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Somerset	64 min
Jul 23, 3:30 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	60 min
Jul 23, 4:03 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Morris, Somerset	57 min
Jul 23, 4:09 PM EDT	Tornado Warning	PHI	Middlesex, Somerset	36 min
Jul 23, 4:51 PM EDT	Areal Flood Warning	PHI	Middlesex, Somerset	105 min
Jul 23, 5:03 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Somerset	57 min
Jul 23, 5:13 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Somerset	62 min
Jul 23, 7:00 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	60 min
Jul 23, 7:10 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Morris, Somerset	35 min
Jul 23, 7:48 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	57 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.