Alert archive / New Jersey / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 28, NWS Philadelphia/Mount Holly

May 24, 1999Camden County, Gloucester County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 24, 1999, 4:51 PM EDT for Camden County, Gloucester County, New Jersey. It was in force for 39 min. 2 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 24, 1999, 4:51 PM EDT (20:51 UTC)
Expired: May 24, 1999, 5:30 PM EDT
In force: 39 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

Counties Camden County, NJ, Gloucester County, NJ

What was reported inside it

Time	Report	Where	Remark
May 24, 4:55 PM EDT	Hail 0.75	Williamstown, NJ
May 24, 5:00 PM EDT	Hail 1	Ancora, 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.

Issued	Product	Office	Lasted
May 24, 1:00 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.9 hours before the alert went out and 95 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: 61 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 1309 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 173 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 242051 RRA
SVRPHL
NJC007-011-015-242130-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
451 PM EDT MON MAY 24 1999

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN GLOUCESTER COUNTY IN NEW JERSEY.
  SOUTHEASTERN CAMDEN COUNTY IN NEW JERSEY.
  CUMBERLAND COUNTY IN NEW JERSEY.

* UNTIL 530 PM EDT.

* AT 445 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A RAPIDLY DEVELOPING LINE OF SEVERE THUNDERSTORMS ACROSS
  SOUTHEAST CAMDEN AND GLOUCESTER COUNTIES TO CUMBERLAND COUNTY IN
  THE VICINITY OF VINELAND. THE LINE WAS MOVING NORTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORMS ARE EXPECTED TO BE NEAR...
  WINSLOW AT 500 PM EDT.
  CECIL  AT 500 PM EDT.

THESE ARE DANGEROUS STORMS. 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.

DO NOT DRIVE YOUR CAR WHERE WATER COVERS THE ROADWAY. THE WATER
MAY BE DEEPER THAN YOU THINK. IF CAUGHT IN RISING FLOOD WATERS...
ABANDON YOUR CAR QUICKLY AND MOVE TO HIGHER GROUND.

FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO N6OAA WEATHER
RADIO...YOUR LOCAL RADIO OR TELEVISION STATIONS...OR YOUR CABLE
TELEVISION OUTLET.

.END
JRP/AMC

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 9:20 AM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	35 min
May 24, 9:39 AM EDT	Severe Thunderstorm Warning	PHI	Camden	31 min
May 24, 9:52 AM EDT	Severe Thunderstorm Warning	PHI	Burlington	33 min
May 24, 10:26 AM EDT	Severe Thunderstorm Warning	PHI	Mercer	34 min
May 24, 10:37 AM EDT	Severe Thunderstorm Warning	PHI	Somerset	48 min
May 24, 3:26 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	34 min
May 24, 3:40 PM EDT	Severe Thunderstorm Warning	PHI	Camden	30 min
May 24, 4:26 PM EDT	Severe Thunderstorm Warning	PHI	Burlington	34 min
May 24, 4:51 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland	39 min
May 24, 5:09 PM EDT	Severe Thunderstorm Warning	PHI	Burlington	51 min
May 24, 5:42 PM EDT	Severe Thunderstorm Warning	PHI	Ocean	33 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 1999 Every severe thunderstorm warning in 1999

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.