Alert archive / New Jersey / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 102, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 21, 1994, 8:50 PM EDT for Atlantic County, Cumberland County, New Jersey. It was in force for 55 min.
The area
The counties it named.
The facts
- Issued
- Aug 21, 1994, 8:50 PM EDT (00:50 UTC)
- Expired
- Aug 21, 1994, 9:45 PM EDT
- In force
- 55 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties Atlantic County, NJ, Cumberland County, NJ
The nearest sounding before it
Atlantic City In, NJ (KACY), launched 00:00Z, 0.8 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
- 1396 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 713 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 4.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS1 KACY 220050 RRA SVRACY NJC001-011-220145- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ATLANTIC CITY NJ 850 PM EDT SUN AUG 21 1994 THE NATIONAL WEATHER SERVICE IN ATLANTIC CITY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 945 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH NEW JERSEY ...ATLANTIC COUNTY...CUMBERLAND COUNTY AND THE ADJACENT COASTAL WATERS WEATHER SERVICE RADARS INDICATED AND SURFACE REPORTS CONFIRM THUNDERSTORMS WITH DAMAGING WINDS MOVING INTO WESTERN ATLANTIC AND CUMBERLAND COUNTIES. THE LINE OF THUNDERSTORMS EXTENDED FROM JUST WEST OF HAMMONTON TO BETWEEN PORT NORRIS AND CEDARVILLE. THESE STORMS WERE MOVING EASTNORTHEAST AT 25 TO 30 MILES AN HOUR. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN... AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. &
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Aug 21, 7:51 PM EDT, 59 minutes before
NJZ019>026-501-212100- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATLANTIC CITY NJ 745 PM EDT SUN AUG 21 1994 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR ATLANTIC...CAPE MAY AND CUMBERLAND COUNTIES IN SOUTHERN NEW JERSEY UNTIL 9 PM... AT 730 PM...ATLANTIC CITY WEATHER RADAR SHOWED AN AREA OF SHOWERS AND THUNDERSTORMS FROM CENTRAL NEW JERSEY...SOUTHWEST ACROSS DELAWARE INTO NORTHEAST MARYLAND. A THUNDERSTORM WITH VERY HEAVY RAIN WAS LOCATED NEAR DOVER DELAWARE AND IS EXPECTED TO CROSS THE UPPER BAY AND ENTER CUMBERLAND COUNTY WITH THE NEXT HOUR. MOVEMENT WAS NORTHEAST AT 25 TO 30 MILES AN HOUR. THE SEVERE THUNDERSTORM WATCH MEAN THAT CONDITIONS ARE FAVORABLE PFOR THUNDERSTORMS TO DEVELOP OR MOVE INTO THE WATCH AREA. A SEVERE THUNDERSTORM IS A STORM THAT GIVES HAIL 3/4 QUARTERS OF AN INCH OR WINDS OF 58 MILES AN HOUR OR GREATER. WPA
Special weather statement, Aug 21, 8:00 PM EDT, 50 minutes before
PAZ067>071-NJZ015>019-220030- SPECIAL WEATHER STATEMENT - SEVERE THUNDERSTORM WATCH EXPIRED NATIONAL WEATHER SERVICE PHILADELPHIA PA/MT HOLLY NJ 800 PM EDT SUN AUG 21 1994 ...SEVERE THUNDERSTORM WATCH FOR CENTRAL AND SOUTHWEST NEW JERSEY HAS EXPIRED... THE SEVERE THUNDERSTORM WATCH FOR CENTRAL AND SOUTHWEST NEW JERSEY HAS EXPIRED. WHILE SEVERE THUNDERSTORMS ARE NOT EXPECTED ANY LONGER... THUNDERSTORMS WITH HEAVY RAIN WILL CONTINUE TO AFFECT SOUTHWEST NEW JERSEY AND NEARBY ADJACENT PARTS OF PENNSYLVANIA...INCLUDING PHILADELPHIA...DURING THE NEXT HOUR OR SO. THUNDERSTORMS HAVE HAD A HISTORY OF PRODUCING VERY HEAVY RAIN...AROUND AN INCH PER HOUR...IN DELAWARE AND NORTHEAST MARYLAND THIS EVENING. MOTORISTS ARE ADVISED TO USE CAUTION ON AREA ROADWAYS DURING THE NEXT TWO HOURS. DO NOT LET YOURSELF OR YOUR VEHICLE BECOME A STATISTIC. IT ONLY TAKES ABOUT TWO FEET OF STANDING WATER FOR CARS TO START FLOATING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 9 PM EDT FOR THE SOUTHEAST NEW JERSEY COUNTIES OF CUMBERLAND...ATLANTIC AND CAPE MAY. GIGI
Special weather statement, Aug 21, 8:26 PM EDT, 24 minutes before
PAZ067>071-NJZ015>019-220130-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHILADELPHIA PA/MT HOLLY NJ
826 PM EDT SUN AUG 21 1994
...STRONG THUNDERSTORMS IN THE PHILADELPHIA METROPOLITAN AREA...
AT 815 PM WEATHER SERVICE DOPPLER RADAR SHOWED A LINE OF STRONG
THUNDERSTORMS FROM NEAR SANDY HOOK NEW JERSEY ACROSS MONMOUTH COUNTY
TO NORTHERN BURLINGTON COUNTY ALONG THE DELAWARE RIVER. THERE WAS
ANOTHER LINE OF STRONG THUNDERSTORMS FROM PHILADELPHIA THROUGH
CENTRAL GLOUCESTER AND SALEM COUNTIES IN NEW JERSEY TO NEAR DOVER
DELAWARE. ALL THE THUNDERSTORMS WERE MOVING TOWARD THE NORTHEAST
AT 20 TO 25 MPH.
THESE THUNDERSTORMS HAVE A HISTORY OR PRODUCING LOCALLY HEAVY
RAIN...OVER 1 INCH IN AN HOUR. THERE MAY ALSO GUSTY WINDS AND
SMALL HAIL WITH THESE THUNDERSTORMS.
THERE ARE OTHER LESS INTENSE SHOWERS AND THUNDERSTORMS
SCATTERED THROUGHOUT THE METROPOLITAN AREA.
MOTORISTS SHOULD REMAIN ALERT FOR REDUCED VISIBILITIES DURING
DOWNPOURS OF RAIN. STREETS MAY FLOOD QUICKLY. DO NOT DRIVE YOUR
CAR THROUGH FLOOD WATERS. THE WATER MAY BE DEEPER THAN YOU THINK.
SPSpecial weather statement, Aug 21, 8:27 PM EDT, 23 minutes before
PAZ067>071-NJZ015>019-220130-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHILADELPHIA PA/MT HOLLY NJ
826 PM EDT SUN AUG 21 1994
...STRONG THUNDERSTORMS IN THE PHILADELPHIA METROPOLITAN AREA...
AT 815 PM WEATHER SERVICE DOPPLER RADAR SHOWED A LINE OF STRONG
THUNDERSTORMS FROM NEAR SANDY HOOK NEW JERSEY ACROSS MONMOUTH COUNTY
TO NORTHERN BURLINGTON COUNTY ALONG THE DELAWARE RIVER. THERE WAS
ANOTHER LINE OF STRONG THUNDERSTORMS FROM PHILADELPHIA THROUGH
CENTRAL GLOUCESTER AND SALEM COUNTIES IN NEW JERSEY TO NEAR DOVER
DELAWARE. ALL THE THUNDERSTORMS WERE MOVING TOWARD THE NORTHEAST
AT 20 TO 25 MPH.
THESE THUNDERSTORMS HAVE A HISTORY OR PRODUCING LOCALLY HEAVY
RAIN...OVER 1 INCH IN AN HOUR. THERE MAY ALSO GUSTY WINDS AND
SMALL HAIL WITH THESE THUNDERSTORMS.
THERE ARE OTHER LESS INTENSE SHOWERS AND THUNDERSTORMS
SCATTERED THROUGHOUT THE METROPOLITAN AREA.
MOTORISTS SHOULD REMAIN ALERT FOR REDUCED |VISIBILITIES DURING
DOWNPOURS OF RAIN. STREETS MAY FLOOD QUICKLY. DO NOT DRIVE YOUR
CAR THROUGH FLOOD WATERS. THE WATER MAY BE DEEPER THAN YOU THINK.
SPSpecial weather statement, Aug 21, 8:43 PM EDT, 7 minutes before
NJZ019>026-501-212100- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATLANTIC CITY NJ 845 PM EDT SUN AUG 21 1994 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR ATLANTIC...CAPE MAY AND CUMBERLAND COUNTIES IN SOUTHERN NEW JERSEY UNTIL 9 PM... AT 830 PM...ATLANTIC CITY WEATHER RADAR SHOWED AN AREA OF SHOWERS AND THUNDERSTORMS OVER MOST OF CENTRAL AND SOUTHWESTERN NEW JERSEY...SOUTHEAST PENNSYLVANIA...DELWARE AND NORTHEAST MARYLAND. THUNDERSTORMS WITH HEAVY RAIN WERE LOCATED IN NORTHERN CUMBERLAND COUNTY. OTHERS WERE SCATTERED ACROSS CENTRAL NEW JERSEY INTO MONTGOMERY COUNTY PENNSYLVANIA. MOVEMENT WAS EAST AT 30 MILES AN HOUR. THE SEVERE THUNDERSTORM WATCH MEAN THAT CONDITIONS ARE FAVORABLE FOR THUNDERSTORMS TO DEVELOP OR MOVE INTO THE WATCH AREA. A SEVERE THUNDERSTORM IS A STORM THAT GIVES HAIL 3/4 QUARTERS OF AN INCH OR WINDS OF 58 MILES AN HOUR OR GREATER. WPA
Special weather statement, Aug 21, 8:45 PM EDT, 5 minutes before
NJZ019>026-501-212100- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATLANTIC CITY NJ 845 PM EDT SUN AUG 21 1994 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR ATLANTIC...CAPE MAY AND CUMBERLAND COUNTIES IN SOUTHERN NEW JERSEY UNTIL 9 PM... AT 830 PM...ATLANTIC CITY WEATHER RADAR SHOWED AN AREA OF SHOWERS AND THUNDERSTORMS OVER MOST OF CENTRAL AND SOUTHWESTERN NEW JERSEY...SOUTHEAST PENNSYLVANIA...DELWARE AND NORTHEAST MARYLAND. THUNDERSTORMS WITH HEAVY RAIN WERE LOCATED IN NORTHERN CUMBERLAND COUNTY. OTHERS WERE SCATTERED ACROSS CENTRAL NEW JERSEY INTO MONTGOMERY COUNTY PENNSYLVANIA. MOVEMENT WAS EAST AT 30 MILES AN HOUR. THE SEVERE THUNDERSTORM WATCH MEAN THAT CONDITIONS ARE FAVORABLE FOR THUNDERSTORMS TO DEVELOP OR MOVE INTO THE WATCH AREA. A SEVERE THUNDERSTORM IS A STORM THAT GIVES HAIL 3/4 QUARTERS OF AN INCH OR WINDS OF 58 MILES AN HOUR OR GREATER. WPA
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 8:46 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester | 44 min |
| Aug 21, 10:07 PM EDT | Severe Thunderstorm Warning | PHI | Mercer | 33 min |
| Aug 22, 1:25 AM EDT | Flash Flood Warning | PHI | Mercer | 95 min |
| Aug 22, 3:15 AM EDT | Flash Flood Warning | PHI | Mercer | 3 hr |
| Aug 22, 4:37 PM EDT | Flash Flood Warning | PHI | Mercer | 3 hr |
| Aug 22, 5:06 PM EDT | Flash Flood Warning | PHI | Camden | 4 hr |
Nearby
Severe Thunderstorm Warnings in New Jersey, 1994Every severe thunderstorm warning in 1994
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.