Alert archive / New Jersey / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 56, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Nov 20, 1989, 9:28 PM EST for Atlantic County, Cumberland County, New Jersey. It was in force for 77 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
- Nov 20, 1989, 9:28 PM EST (02:28 UTC)
- Expired
- Nov 20, 1989, 10:45 PM EST
- In force
- 77 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties Atlantic County, NJ, Cumberland County, NJ
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Nov 20, 10:00 PM EST | Thunderstorm Wind 75 | Atlantic, NJ | |
| Nov 20, 10:05 PM EST | Thunderstorm Wind 53 | Cumberland, NJ | |
| Nov 20, 10:05 PM EST | Thunderstorm Wind 62 | Cumberland, NJ | |
| Nov 20, 10:13 PM EST | Thunderstorm Wind 53 | Atlantic, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Atlantic City In, NJ (KACY), launched 00:00Z, 2.5 hours before the alert went out and 33 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1712 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 197 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KACY 210229
SVRACY
NJC001-011-029-210430-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE ATLANTIC CITY NJ
928 PM EST MON NOV 20 1989
THE NATIONAL WEATHER SERVICE IN ATLANTIC CITY HAS ISSUED A
SEVERE THUNDERSTORM WARNING AND
SPECIAL MARINE WARNING EFFECTIVE UNTIL 1130 PM EST
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTH NEW JERSEY
...ATLANTIC...CUMBERLAND...OCEAN
AND ADJACENT COASTAL WATERS.
A LINE OF THUNDERSTORMS IS MOVING INTO NEW JERSEY AT THIS TIME. WIND
GUSTS IN EXCESS OF 60 MPH WERE REPORTED OVER SOUTHEASTERN
PENNSYLVANINA.
THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 50 MPH AND WILL MOVE INTO
THE WARNED COUNTIES IN THE NEXT HOUR.
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND
DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
GOGNIATThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 20, 8:55 PM EST | Severe Thunderstorm Warning | PHI | Mercer | 65 min |
| Nov 20, 9:15 PM EST | Severe Thunderstorm Warning | PHI | Burlington, Camden | 60 min |
| Nov 20, 9:15 PM EST | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 60 min |
| Nov 20, 9:28 PM EST | Severe Thunderstorm Warning | PHI | Ocean | 2 hr |
| Nov 20, 9:56 PM EST | Severe Thunderstorm Warning | PHI | Cape May | 2 hr |
Nearby
Severe Thunderstorm Warnings in New Jersey, 1989Every severe thunderstorm warning in 1989
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.