Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 12, NWS Philadelphia/Mount Holly

March 8, 2008Burlington County, Camden County, Gloucester County, New Jersey; 4 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Mar 8, 2008, 5:44 PM EST for Burlington County, Camden County, Gloucester County, New Jersey; 4 counties in Pennsylvania. It was in force for 46 min. 6 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
Mar 8, 2008, 5:44 PM EST (22:44 UTC)
Expired
Mar 8, 2008, 6:30 PM EST
In force
46 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 71 km from the middle of the area, began a volume at 22:45 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

TimeReportWhereRemark
Mar 8, 5:57 PM ESTTSTM WND GST 65Willow Grove, PA
Mar 8, 6:00 PM ESTTSTM WND DMG5 Nw Pitman, NJTREES DOWN.
Mar 8, 6:05 PM ESTTSTM WND GST 60Glassboro, NJ
Mar 8, 6:05 PM ESTTSTM WND GST 60Philadelphia, PAREPORT FROM NE PHILADELPHIA.
Mar 8, 6:07 PM ESTTSTM WND GST 71Ne Philadelphia, PATREES AND UTILITY POLES DOWN.
Mar 8, 6:10 PM ESTTSTM WND DMG3 S Levittown, PATREES AND WIRES DOWN. TREES DOWN ON CARS.

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.7 hours before the alert went out and 212 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, Brookhaven, NY at 12:00Z on 2008-03-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2008-03-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 176 square meters per square second.1939587897117136Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
444 m above ground
0-6 km bulk shear
77 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
240 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 082245
SVRPHI
NJC005-007-015-PAC017-045-091-101-082330-
/O.NEW.KPHI.SV.W.0012.080308T2244Z-080308T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
544 PM EST SAT MAR 8 2008

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
  DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF SPRINGFIELD...
  MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
  PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF PHILADELPHIA...
  NORTHWESTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  WESTERN CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF CAMDEN...
  GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 630 PM EST

* AT 541 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS LOCATED NEAR
  SPRINGFIELD...AND MOVING NORTHEAST AT 55 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CHESTNUT HILL...PLYMOUTH MEETING...GERMANTOWN AND ROXBOROUGH BY 550
  PM EST...
  AMBLER BY 555 PM EST...
  IVYLAND AND WILLOW GROVE BY 600 PM EST...
  RICHBORO BY 605 PM EST...
  NEW HOPE BY 610 PM EST...
  NEW HOPE BY 615 PM EST...

DAMAGING WINDS UP TO 62 MILES AN HOUR WERE REPORTED IN BEAR DELAWARE 
WITH THIS STORM. THIS IS A DANGEROUS STORM...SEEK SAFE SHELTER AND 
STAY AWAY FROM WINDOWS

LAT...LON 3961 7508 3991 7555 4007 7537 4007 7541
      4013 7548 4012 7551 4015 7551 4015 7554
      4020 7556 4026 7564 4057 7522 4047 7506
      4040 7504 4040 7497 4031 7492 4030 7488
      4015 7472 4017 7469 4015 7465
TIME...MOT...LOC 2244Z 218DEG 60KT 3998 7534

$$

SZATKOWSKI

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 8, 4:40 AM ESTWind AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more27 hr
Mar 8, 10:38 AM ESTSevere Thunderstorm WarningPHIBurlington, Ocean37 min
Mar 8, 12:03 PM ESTFlash Flood WarningPHIBurlington, Camden, Gloucester, Mercer, Salem4 hr
Mar 8, 12:36 PM ESTFlash Flood WarningPHIHunterdon, Mercer, Morris, Somerset, Sussex, Warren5 hr
Mar 8, 1:35 PM ESTRiver Flood WarningPHISomerset31 hr
Mar 8, 1:35 PM ESTRiver Flood WarningPHIEssex, Morris, Passaic4 days
Mar 8, 1:35 PM ESTRiver Flood WarningPHIEssex, Passaic4 days
Mar 8, 1:35 PM ESTRiver Flood WarningPHIPassaic44 hr
Mar 8, 1:35 PM ESTRiver Flood WarningPHIMorris, Passaic44 hr
Mar 8, 1:35 PM ESTRiver Flood WarningPHIBergen, Morris, Passaic21 hr
Mar 8, 1:35 PM ESTRiver Flood WarningPHIMiddlesex, Somerset25 hr
Mar 8, 1:35 PM ESTRiver Flood WarningPHIMorris65 hr
Mar 8, 3:58 PM ESTHigh Wind WarningPHIBurlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 7 more6 hr
Mar 8, 4:09 PM ESTRiver Flood WarningPHIMorris, Somerset5 hr
Mar 8, 4:09 PM ESTRiver Flood WarningPHIMorris, Somerset5 hr
Mar 8, 4:09 PM ESTRiver Flood WarningPHIMorris, Passaic5 hr
Mar 8, 4:09 PM ESTRiver Flood WarningPHIMorris25 hr
Mar 8, 4:28 PM ESTRiver Flood WarningPHIHunterdon, Somerset17 hr
Mar 8, 5:49 PM ESTSevere Thunderstorm WarningPHIWarren41 min
Mar 8, 6:03 PM ESTSevere Thunderstorm WarningPHIHunterdon, Mercer, Middlesex, Somerset57 min
Mar 8, 6:28 PM ESTSevere Thunderstorm WarningPHIMorris, Sussex62 min
Mar 8, 6:51 PM ESTRiver Flood WarningPHISomerset10 hr
Mar 8, 1:05 PM ESTRiver Flood WarningPHIBucks13 hr
Mar 8, 5:22 PM ESTSevere Thunderstorm WarningPHIDelaware23 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2008Severe Thunderstorm Warnings in New Jersey, 2008Every 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.