Alert archive / New Jersey / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 15, NWS Philadelphia/Mount Holly

May 1, 1997Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 1, 1997, 6:09 PM EDT for Salem County, New Jersey. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 1, 1997, 6:09 PM EDT (22:09 UTC)
Expired
May 1, 1997, 6:55 PM EDT
In force
46 min
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County Salem County, NJ

The radar

The Dover AFB radar (KDOX), 84 km from the middle of the area, began a volume at 22:10 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.

The watch it was issued in

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

IssuedProductOfficeLasted
May 1, 4:00 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.2 hours before the alert went out and 65 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, Phillips Aaf/Abe, MD at 12:00Z on 1997-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 1997-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 164 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
833 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
164 m²/s²
0-3 km storm-relative helicity
178 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 
TTAA00 KPHL 012209 RRA
SVRPHL
NJC007-015-033-PAC045-101-012255-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
609 PM EDT THU MAY 1 1997

THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY NJ HAS
ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 655 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN  PENNSYLVANIA

   ...DELAWARE COUNTY
   ...PHILADELPHIA COUNTY

IN  NEW JERSEY

   ...SALEM COUNTY
   ...GLOUCESTER COUNTY
   ...CAMDEN COUNTY
 
AT 605 PM...NWS DOPPLER RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS MOVING THROUGH NORTHERN NEW CASTLE COUNTY AND WESTERN
DELAWARE COUNTY.  THESE STORMS ARE MOVING TO THE EAST AT 35 MPH.
THESE STORMS WILL AFFECT THE CITY OF PHILADELPHIA AND ADJACENT
SUBURBS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR THE AREA.

IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER NOW.  AFTER THE
STORM HAS PASSED...REPORT ANY SEVERE WEATHER OR FLOODING TO YOUR
LOCAL LAW ENFORCEMENT AGENCY AND HAVE THEM RELAY YOUR SEVERE WEATHER
REPORT ON TO THE NATIONAL WEATHER SERVICE.

SEVERE THUNDERSTORMS CONTAIN WINDS GREATER THAN 58 MILES AN HOUR...
DIME SIZE HAIL OR LARGER...VERY HEAVY RAINS <AND DEADLY LIGHTNING.

STAY TUNED TO NOAA WEATHER RADIO...THE VOICE OF THE NATIONAL WEATHER
SERVICE...OR TO COMMERCIAL RADIO OR TELEVISION STATIONS FOR THE
LATEST STORM INFORMATION.

JONES/SZATKOWSKI

The office that day

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

IssuedProductOfficeCountiesLasted
May 1, 5:37 PM EDTSevere Thunderstorm WarningPHISussex, Warren48 min
May 1, 6:09 PM EDTSevere Thunderstorm WarningPHICamden, Gloucester46 min
May 1, 6:30 PM EDTSevere Thunderstorm WarningPHIBurlington40 min
May 1, 6:49 PM EDTSevere Thunderstorm WarningPHIMercer51 min
May 1, 6:54 PM EDTSevere Thunderstorm WarningPHIBurlington, Monmouth, Ocean46 min
May 1, 6:54 PM EDTSevere Thunderstorm WarningPHIMiddlesex46 min
May 1, 7:05 PM EDTSevere Thunderstorm WarningPHIAtlantic45 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 1997Every severe thunderstorm warning in 1997

Sources

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