Alert archive / New Jersey / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 59, NWS Philadelphia/Mount Holly

June 1, 1998Cape May County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 1, 1998, 1:42 AM EDT for Cape May County, New Jersey. It was in force for 48 min. 1 report 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: Jun 1, 1998, 1:42 AM EDT (05:42 UTC)
Expired: Jun 1, 1998, 2:30 AM EDT
In force: 48 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

County Cape May County, NJ

The radar

The Dover AFB radar (KDOX), 59 km from the middle of the area, began a volume at 05:43 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 1, 2:10 AM EDT	Thunderstorm Wind 50	Countywide, 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 nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 5.7 hours before the alert went out and 137 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: 1496 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 919 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

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

366 
WUUS1 KPHL 010543 RRA
SVRPHL
NJC009-010630-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
142 AM EDT MON JUN 1 1998

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CAPE MAY COUNTY IN NEW JERSEY

* UNTIL 230 AM EDT

* AT 141 AM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A LINE OF SEVERE THUNDERSTORMS MOVING EAST ACROSS CUMBERLAND
  COUNTY. THESE STORMS HAVE PRODUCED DAMAGING WIND GUSTS.

A TORNADO WATCH REMAINS IN EFFECT FOR THE AREA. SEVERE
THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH
LITTLE OR NO ADVANCE WARNING.

THIS IS A DANGEROUS STORM. MOVE INSIDE A STRONG BUILDING AND DO
NOT STAND NEAR WINDOWS. FOR YOUR PROTECTION MOVE TO AN INTERIOR
ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.

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

KRAUS/DELISI

The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 8:42 PM EDT	Tornado Warning	PHI	Sussex	33 min
May 31, 10:31 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	19 min
May 31, 11:01 PM EDT	Severe Thunderstorm Warning	PHI	Warren	34 min
May 31, 11:24 PM EDT	Severe Thunderstorm Warning	PHI	Morris	31 min
Jun 1, 1:10 AM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex	50 min
Jun 1, 1:15 AM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	35 min
Jun 1, 1:15 AM EDT	Severe Thunderstorm Warning	PHI	Camden	35 min
Jun 1, 1:26 AM EDT	Severe Thunderstorm Warning	PHI	Cumberland	49 min
Jun 1, 1:30 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington	65 min
Jun 1, 1:37 AM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	63 min
Jun 1, 1:37 AM EDT	Severe Thunderstorm Warning	PHI	Middlesex	63 min
Jun 1, 1:44 AM EDT	Severe Thunderstorm Warning	PHI	Mercer	36 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 1998 Every severe thunderstorm warning in 1998

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.