Alert archive / New Jersey / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 35, NWS Philadelphia/Mount Holly

May 12, 2002Burlington County, Camden County, Gloucester County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 12, 2002, 6:45 PM EDT for Burlington County, Camden County, Gloucester County, New Jersey. It was in force for 45 min. 4 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
May 12, 2002, 6:45 PM EDT (22:45 UTC)
Expired
May 12, 2002, 7:30 PM EDT
In force
45 min
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ

The radar

The Philadelphia radar (KDIX), 47 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
May 12, 6:45 PM EDTThunderstorm Wind 52 MPaulsboro, NJ
May 12, 6:55 PM EDTThunderstorm Wind 61 ERunnemede, NJ
May 12, 6:55 PM EDTThunderstorm Wind 50 EMarlton, NJ
May 12, 7:10 PM EDTThunderstorm Wind 50 ETabernacle, NJ

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

IssuedProductOfficeLasted
May 12, 5:15 PM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.8 hours before the alert went out and 211 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 2002-05-12Temperature 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 2002-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 66 square meters per square second.19395878Sfc1 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
1140 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
391 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 122245
SVRPHI
NJC005-007-015-122330-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
644 PM EDT SUN MAY 12 2002

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY.
  CAMDEN COUNTY IN SOUTHERN NEW JERSEY.
  GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY.

* UNTIL 730 PM EDT.

* AT 640 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERE THUNDERSTORMS... ALONG A LINE EXTENDING FROM 11 MILES
  NORTHWEST OF WILLINGBORO TO 7 MILES NORTH OF GIBBSTOWN TO 6 MILES
  SOUTHWEST OF GIBBSTOWN...MOVING EAST AT 35 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  GLOUCESTER CITY AT 650 PM.
  WOODBURY...MULLICA HILL...BELLMAWR AT 655 PM.
  WILLINGBORO...MAGNOLIA...CHERRY HILL AT 700 PM.
  TURNERSVILLE...MARLTON...LINDENWOLD AT 705 PM.

DAMAGING WINDS IN EXCESS OF 55 MPH ARE EXPECTED FROM THIS STORM. SEEK
SHELTER IN A STURDY STRUCTURE UNTIL THE STORM HAS PASSED. WINDS 
GUSTED TO 60 MPH IN WEST CHESTER OF SOUTHEASTERN PENNSYLVANIA 
BETWEEN 610 AND 615 PM AND WINDS GUSTED OVER 50 MPH IN PHILADELPHIA 
INTERNATIONAL AIRPORT AT AROUND 630 PM.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...SEEK SHELTER
IMMEDIATELY

FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER
RADIO...YOUR LOCAL RADIO OR TELEVISION STATION...OR YOUR CABLE
TELEVISION OUTLET.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM SUNDAY
EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN
NEW JERSEY AND SOUTHEAST PENNSYLVANIA. A SEVERE THUNDERSTORM WATCH
ALSO REMAINS IN EFFECT UNTIL 900 PM SUNDAY EVENING FOR EASTERN
PENNSYLVANIA.

$$

LAT...LON 4009 7485 3986 7522 3979 7540 3952 7499
          3997 7451

JWH

The office that day

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

IssuedProductOfficeCountiesLasted
May 12, 6:07 PM EDTSpecial Marine WarningPHI83 min
May 12, 6:33 PM EDTSevere Thunderstorm WarningPHICumberland, Salem42 min
May 12, 7:12 PM EDTSevere Thunderstorm WarningPHIMonmouth, Ocean33 min
May 12, 7:16 PM EDTSpecial Marine WarningPHI74 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2002Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.