Alert archive / New Jersey / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 28, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 7, 1991, 12:17 PM EDT for Burlington County, Camden County, New Jersey. It was in force for 58 min. 5 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
- Jul 7, 1991, 12:17 PM EDT (16:17 UTC)
- Expired
- Jul 7, 1991, 1:15 PM EDT
- In force
- 58 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties Burlington County, NJ, Camden County, NJ
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 7, 12:18 PM EDT | Thunderstorm Wind 53 | Burlington, NJ | |
| Jul 7, 12:25 PM EDT | Hail 0.75 | Camden, NJ | |
| Jul 7, 12:43 PM EDT | Thunderstorm Wind 52 | Burlington, NJ | |
| Jul 7, 12:45 PM EDT | Thunderstorm Wind 0 | Burlington, NJ | |
| Jul 7, 12:50 PM EDT | Thunderstorm Wind 0 | Camden, 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 12:00Z, 4.3 hours before the alert went out and 51 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
- 1207 J/kg
- Mixed-layer CIN
- -109 J/kg
- Mixed-layer LCL
- 1172 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 76 m²/s²
- 0-3 km storm-relative helicity
- 67 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 KPHL 071617 SVRPHL NJC005-007-015-033-021-071715- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHILADELPHIA PA 1217 PM EDT SUN JUL 7 1991 THE NATIONAL WEATHER SERVICE IN
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, Jul 7, 11:12 AM EDT, 1 hour 5 minutes before
DEZ003-002-001-071700- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON DE 1108 AM EDT SUN JUL 7 1991 AT 11 PM NATIONAL WEATHER SERVICE RADAR SHOWED A LINE OF THUNDERSTORMS LOCATED FROM 25 MILES NORTHWEST OF THE NEW CASTLE COUNTY AIRPORT TO AROUND 30 MILES WEST TO AROUND 45 MILES WEST NORTHWEST OF DOVER. THESE ARE MOVING TOWARD THE EAST AT 25 TO 30 MILES PER HOUR AND WILL BE MOVING INTO NORTHERN AND PARTS OF CENTRAL DELAWARE AFTER 12 NOON. SOME BRIEF HEAVY RAIN...DANGEROUS LIGHTNING...AND STRONG GUSTY WINDS CAN BE EXPECTED WITH THESE THUNDERSTORMS. THE STATE POLICE IN BELAIR MARYLAND REPORTED ONE TREE BLOWN DOWN SO FAR...BUT NO DETAILS ON SIZE.
Special weather statement, Jul 7, 11:16 AM EDT, 1 hour 1 minute before
DEZ003-002-001-071700- SPECIAL WEATHER STATEMENT CORRECTION NATIONAL WEATHER SERVICE WILMINGTON DE 1108 AM EDT SUN JUL 7 1991 AT 11 AM NATIONAL WEATHER SERVICE RADAR SHOWED A LINE OF THUNDERSTORMS LOCATED FROM 25 MILES NORTHWEST OF THE NEW CASTLE COUNTY AIRPORT TO AROUND 30 MILES WEST...TO AROUND 45 MILES WEST NORTHWEST OF DOVER. THESE ARE MOVING TOWARD THE EAST AT 25 TO 30 MILES PER HOUR AND WILL BE MOVING INTO NORTHERN AND PARTS OF CENTRAL DELAWARE AFTER 12 NOON. SOME BRIEF HEAVY RAIN...DANGEROUS LIGHTNING...AND STRONG GUSTY WINDS CAN BE EXPECTED WITH THESE THUNDERSTORMS. THE STATE POLICE IN BELAIR MARYLAND REPORTED ONE TREE BLOWN DOWN SO FAR...BUT NO DETAILS ON SIZE. CS
Special weather statement, Jul 7, 11:23 AM EDT, 54 minutes before
PAZ011-016-071630- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALLENTOWN PA 1115 AM EDT SUN JUL 7 1991 ...SEVERE THUNDERSTORM WATCH UNTL 5 PM EDT FOE EASTERN PENNSYLVANIA... ...VERY HEAVY THUNDERSTORM IN SOUTHERN BERKS COUNTY... AT 1110 AM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A VERY HEAVY THUNDERSTORM IN SOUTHERN BERKS COUNTY MOVING SOUTHEAST AROUND 35 MPH. ALSO...A LINE OF HEAVY THUNDERSTORMS EXTENDS FROM STROUDSBURG TO CHESTER COUNTY. THIS LINE IS MOVING SOUTHEAST AROUND 35 MPH AND WILL MOVE ACROSS SOUTHEASTERN PENNSYLVANIA AND WEST CENTRAL NEW JERSEY BETWEEN 1115 AM AND 1230 PM. PEOPLE LIVING IN SOUTHEASTERN PENNSYLVANIA AND WEST CENTRAL NEW JERSEY SHOULD SEEK SHELTbER WHEN THESE STORMS ARRIVE. REMEMBER...A SEVERE THUNDERSTORMS WATCH MEANS ATMOSPHERIC CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORM DEVELOPMENT IN AND NEAR THE WATCH AREA. DOVICO
Special weather statement, Jul 7, 11:31 AM EDT, 46 minutes before
PAZ011-016-071630- SPECIAL WEATHER STATEMENT...CORRECTION NATIONAL WEATHER SERVICE ALLENTOWN PA 1115 AM EDT SUN JUL 7 1991 ...SEVERE THUNDERSTORM WATCH UNTL 5 PM EDT FOR EASTERN PENNSYLVANIA... ...VERY HEAVY THUNDERSTORM IN SOUTHERN BERKS COUNTY... AT 1110 AM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A VERY HEAVY THUNDERSTORM IN SOUTHERN BERKS COUNTY MOVING SOUTHEAST AROUND 35 MPH. ALSO...A LINE OF HEAVY THUNDERSTORMS EXTENDS FROM STROUDSBURG SOUTHWEST TO CHESTER COUNTY. THIS LINE IS MOVING SOUTHEAST AROUND 35 MPH AND WILL MOVE ACROSS SOUTHEASTERN PENNSYLVANIA AND WEST CENTRAL NEW JERSEY BETWEEN 1115 AM AND 1230 PM. PEOPLE LIVING IN SOUTHEASTERN PENNSYLVANIA AND WEST CENTRAL NE4W JERSEY SHOULD SEEK SHELTER WHEN THESE STORMS ARRIVE. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS ATMOSPHERIC CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORM DEVELOPMENT IN AND NEAR THE WATCH AREA. DOVICO
Special weather statement, Jul 7, 11:51 AM EDT, 26 minutes before
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
Special weather statement, Jul 7, 12:02 PM EDT, 15 minutes before
PAZ012-NJZ002-072100- SPECIAL WEATHER STATEMENT - SEVERE THUNDERSTORM WATCH NATIONAL WEATHER SERVICE PHILADELPHIA PA 1200 NOON EDT SUN JUL 7 1991 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 5 PM EDT TODAY FOR MOST OF CENTRAL AND SOUTHERN PENNSYLVANIA AND ALL OF SOUTHERN NEW JERSEY INCLUDING ADJACENT COASTAL WATERS... AT 12 NOON NATIONAL WEATHER SERVICE RADAR SHOWED A LINE OF HEAVY THUNDERSTORMS JUST WEST OF THE DELAWARE RIVER FROM EAST OF ALLENTOWN INTO DELAWARE. THESE WERE MOVING TOWARD THE EAST AT AROUND 35 MILES AN HOUR. OVER THE NEXT COUPLE HOURS THEY WILL EXIT PENNSYLVANIA AND MOVE THROUGH MERCER...BURLINGTON...CAMDEN...GLOUCESTER AND SALEM COUNTIES OF SOUTHERN NEW JERSEY. DAMAGING WIND GUSTS...HAIL...HEAVY DOWNPOURS AND FREQUENT LIGHTNING HAVE BEEN REPOTED OVER SOUTHEASTERN PENNSYLVANIA AS THESE STORMS MOVED THROUGH. BE PREPARED TO SEEK SHELTER IF THREATENING WEATHER APPROACHES. FURTHER STATEMENTS OR WARNINGS WILL BE ISSUED AS NEEDED. NC
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 12:17 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 58 min |
| Jul 7, 12:17 PM EDT | Severe Thunderstorm Warning | PHI | Mercer | 58 min |
| Jul 7, 12:42 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland | 63 min |
| Jul 7, 1:10 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Ocean | 65 min |
| Jul 7, 1:42 PM EDT | Severe Thunderstorm Warning | PHI | Cape May | 63 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 1991Every severe thunderstorm warning in 1991
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.