Alert archive / New Jersey / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 54, NWS Philadelphia/Mount Holly

June 9, 2009Philadelphia County, Pennsylvania; Burlington County, Camden County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 9, 2009, 8:06 AM EDT for Philadelphia County, Pennsylvania; Burlington County, Camden County, New Jersey. It was in force for 54 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: Jun 9, 2009, 8:06 AM EDT (12:06 UTC)
Expired: Jun 9, 2009, 9:00 AM EDT
In force: 54 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Burlington County, NJ, Camden County, NJ, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 51 km from the middle of the area, began a volume at 12:09 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
Jun 9, 8:15 AM EDT	HAIL 0.88	Collingswood, NJ	DIME TO NICKEL SIZE HAIL REPORTED IN WEST COLLINGSWOOD HEIGHTS.
Jun 9, 8:25 AM EDT	HAIL 0.25	Mount Ephraim, NJ	PEA SIZE HAIL REPORTED IN MOUNT EPHRAIM.

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

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 0.1 hours before the alert went out and 108 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: 1272 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 804 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 091206
SVRPHI
NJC005-007-PAC101-091300-
/O.NEW.KPHI.SV.W.0054.090609T1206Z-090609T1300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
806 AM EDT TUE JUN 9 2009

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF PHILADELPHIA...
  WEST CENTRAL BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  NORTHWESTERN CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF CAMDEN...

* UNTIL 900 AM EDT

* AT 802 AM 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
  GLOUCESTER CITY...OR NEAR CAMDEN...AND MOVING EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GLOUCESTER CITY...CENTER CITY AND KENSINGTON AROUND 810 AM EDT...
  CAMDEN AROUND 815 AM EDT...
  CHERRY HILL AROUND 825 AM EDT...
  GREENTREE AND SPRINGDALE AROUND 830 AM EDT...
  MARLTON AND MOUNT LAUREL AROUND 835 AM EDT...
  MEDFORD AROUND 850 AM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 3988 7514 3988 7515 3988 7520 4003 7518
      4004 7499 4003 7498 4004 7498 4007 7468
      3986 7467
TIME...MOT...LOC 1205Z 271DEG 21KT 3992 7517

$$

KRUZDLO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 4:17 AM EDT	Dense Fog Advisory	PHI		5 hr
Jun 9, 5:38 AM EDT	Severe Thunderstorm Warning	PHI	Berks	67 min
Jun 9, 7:20 AM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	55 min
Jun 9, 8:00 AM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	60 min
Jun 9, 8:20 AM EDT	Areal Flood Advisory	PHI	Delaware, Montgomery, Philadelphia	3 hr
Jun 9, 8:42 AM EDT	Areal Flood Advisory	PHI	Bucks	3 hr
Jun 9, 9:56 AM EDT	Flash Flood Warning	PHI	Chester	105 min
Jun 9, 1:49 PM EDT	Flash Flood Watch	PHI	Delaware, Philadelphia	5 hr
Jun 9, 2:20 PM EDT	Flash Flood Warning	PHI	Berks, Chester	3 hr
Jun 9, 2:24 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	66 min
Jun 9, 2:59 PM EDT	Tornado Warning	PHI	Chester	32 min
Jun 9, 3:08 PM EDT	Tornado Warning	PHI	Chester	28 min
Jun 9, 3:14 PM EDT	Tornado Warning	PHI	Chester	46 min
Jun 9, 3:29 PM EDT	Severe Thunderstorm Warning	PHI	Chester	61 min
Jun 9, 12:48 AM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	42 min
Jun 9, 2:20 AM EDT	Areal Flood Advisory	PHI	Morris	100 min
Jun 9, 8:30 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cumberland, Gloucester, Salem	60 min
Jun 9, 8:43 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester	62 min
Jun 9, 8:47 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	70 min
Jun 9, 9:09 AM EDT	Areal Flood Advisory	PHI	Atlantic, Cape May, Cumberland	3 hr
Jun 9, 9:21 AM EDT	Special Marine Warning	PHI		54 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2009 Severe Thunderstorm Warnings in Pennsylvania, 2009 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.