Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1992
Severe Thunderstorm Warning 58, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 28, 1992, 7:11 PM EDT for Delaware County, Pennsylvania. It was in force for 64 min.
The area
The counties it named.
The facts
- Issued
- Aug 28, 1992, 7:11 PM EDT (23:11 UTC)
- Expired
- Aug 28, 1992, 8:15 PM EDT
- In force
- 64 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
County Delaware County, PA
The nearest sounding before it
Atlantic City In, NJ (KACY), launched 12:00Z, 11.2 hours before the alert went out and 93 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
- 382 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 889 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 65 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 282313 SVRPHL NJC015-033-PAC045-290015- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHILADELPHIA PA 711 PM EDT FRI AUG 28 1992 THE NATIONAL WEATHER SERVICE IN PHILADELPHIA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 815 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH NEW JERSEY ...GLOUCESTER COUNTY...SALEM COUNTY IN SOUTHEAST PENNSYLVANIA ...DELAWARE COUNTY SEVERE THUNDERSTORMS ARE MOVING ACROSS EASTERN MARYLAND AND DELAWARE. AT 710 PM...WEATHER SERVICE RADAR SHOWED THESE SEVERE THUNDERSTORMS MOVING TOWARDS THE NORTHEAST AT AROUND 35 MILES AN HOUR. A TORNADO WATCH CONTINUES FOR SOUTHEASTERN PENNSYLVANIA AND SOUTHERN NEW JERSEY UNTIL 100 AM EDT. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCED WARNING. SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 55 MILES PER HOUR... LARGE HAIL...AND DEADLY LIGHTNING. IF THREATENING WEATHER SUDDENLY APPROACHES YOU...BOATERS SHOULD BE PREPARED TO MOVE TO SAFE HARBOR. IF CAUGHT OUT ON THE OPEN WATER...STAY BELOW DECK...IF POSSIBLE...AND AWAY FROM UNGROUNDED METAL OBJECTS. JWH
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 28, 6:00 PM EDT, 1 hour 11 minutes before
PAZ007>012-016-NJ002>004-006-290300- SPECIAL WEATHER STATEMENT...SEVERE THUNDERSTORM WATCH NATIONAL WEATHER SERVICE PHILADELPHIA PA 545 PM EDT FRI AUG 28 1992 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR A LARGE PART OF EASTERN PENNSYLVANIA UNTIL 11 PM EDT... THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR MOST OF EASTERN PENNSYLVANIA WITH THE EXCEPTION OF THE NORTHERN COUNTIES THAT BORDER NEW YORK. AT 545 PM RADAR SHOWED A LINE OF THUNDERSTORMS FROM NEAR HARRISBURG SOUTHEAST TO THE NORTHERN CHESAPEAKE BAY AND CONTINUING TO SALISBURY MARYLAND. THESE STORMS ARE MOVING RAPIDLY TO THE NORTHEAST AT A SPEED OF 45 MPH AND WILL BE APPROACHING PHILADELPHIA FROM THE SOUTHWEST... OR IF YOU ARE IN CENTER CITY...KEEP AN EYE OUT FOR STORMS APPROACHING FROM THE DIRECTION OF THE AIRPORT. THIS LINE COULD PRODUCE WINDS OF 50 TO 60 MPH AS THEY PASS THROUGH ACCOMPANIED BY HAIL AND BRIEF TORRENTIAL DOWNPOURS. IN ADDITION... QUITE A FEW STATIONS IN VIRGINIA AND MARYLAND ARE REPORTING QUITE A FEW CLOUD TO GROUND LIGHTNING STRIKES WHICH ARE THE ONES THAT KILL. THE COMBINATION OF THE REMNANTS OF ANDREW AND AN APPROACHING COLD FRONT IS PRODUCING THE POTENTIALLY SEVERE WEATHER THIS EVENING. THE FIRST LINE OF THUNDERSTORMS WILL BE APPROACHING PHILADELPHIA AND VICINITY BETWEEN 615 AND 645 PM THEN CONTINUE INTO NORTHEAST PHILADELPHIA. STAY TUNED FOR ADDITIONAL STATEMENTS AND AND POSSIBLE WARNINGS THAT MAY BE ISSUED. TSINCE THE STORMS ARE MOVING SO FAST...THERE MAY NOT BE SUFFICIENT TIME TO WARN FOR ALL STORMS THAT MAY BE SEVERE. EBERWINE
Special weather statement, Aug 28, 6:09 PM EDT, 1 hour 2 minutes before
DEZ003-002-001-282300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON DE 604 PM EDT FRI AUG 28 1992 ...THUNDERSTORMS ABOUT TO ENTER INTO SOUTHEASTERN DELAWARE... ...A TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM EDT FOR DELAWARE... A TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM EDT THIS EVENING FOR THE STATE OF DELAWARE AND THE ADJACENT COASTAL WATERS. WEATHER RADAR SHOWED A LINE OF THUNDERSTORMS WERE MOVING ONTO MARYLANDS EASTERN SHORE AND WILL MOVE INTO SOUTHWESTERN DELAWARE WITHIN THE NEXT HALF AN HOUR. THESE STORMS HAVE PRODUCED TORNADOES FROM BALTIMORE TO PATUXENT RIVER MARYLAND AND ANOTHER WAS ALSO REPORTED 6 MILES EAST OF CAMBRIDGE MARYLAND. TREES AND POWER LINES WERE REPORTED DOWN IN CAMBRIDGE MARYLAND FROM THESE STORMS. LIGHTNING DETECTION SYSTEMS WERE ALSO SHOWING NUMEROUS CLOUD TO GROUND LIGHTNING STRIKES. PERSONS IN EXTREME SOUTHWEST DELAWARE SHOULD BE ON THE LOOKOUT FOR THE POSSIBILITY OF STRONG GUSTY WINDS...LARGE HAIL...AND POSSIBLY TORNADOES. IF THREATENING WEATHER APPROACHES YOUR AREA...SEEK SAFE SHELTER IN THE BASEMENT UNDER HEAVY FURNITURE OR IF NO BASEMENT WITHIN AN INTERIOR CLOSET. BOATERS ARE URGED TO HEAD FOR PORT TO ALLOW FOR PLENTY OF TIME TO REACSAFE HARBOR. THE NATIONAL WEATHER SERVICE WILL CONTINUE TO MONITOR THIS DANGEROUS SITUATION AND WILL ISSUE ANOTHER STATEMENT AT AROUND 700 PM EDT. LOMBARDY
Special weather statement, Aug 28, 6:12 PM EDT, 59 minutes before
DEZ003-002-001-282300- SPECIAL WEATHER STATEMENT CORRECTION NATIONAL WEATHER SERVICE WILMINGTON DE 604 PM EDT FRI AUG 28 1992 ...THUNDERSTORMS ABOUT TO ENTER INTO SOUTHWESTERN DELAWARE... ...A TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM EDT FOR DELAWARE... A TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM EDT THIS EVENING FOR THE STATE OF DELAWARE AND THE ADJACENT COASTAL WATERS. WEATHER RADAR SHOWED A LINE OF THUNDERSTORMS WERE MOVING ONTO MARYLANDS EASTERN SHORE AND WILL MOVE INTO SOUTHWESTERN DELAWARE WITHIN THE NEXT HALF AN HOUR. THESE STORMS HAVE PRODUCED TORNADOES FROM BALTIMORE TO PATUXENT RIVER MARYLAND AND ANOTHER WAS ALSO REPORTED 6 MILES EAST OF CAMBRIDGE MARYLAND. TREES AND POWER LINES WERE REPORTED DOWN IN CAMBRIDGE MARYLAND FROM THESE STORMS. LIGHTNING DETECTION SYSTEMS WERE ALSO SHOWING NUMEROUS CLOUD TO GROUND LIGHTNING STRIKES. PERSONS IN EXTREME SOUTHWEST DELAWARE SHOULD BE ON THE LOOKOUT FOR THE POSSIBILITY OF STRONG GUSTY WINDS...LARGE HAIL...AND POSSIBLY TORNADOES. IF THREATENING WEATHER APPROACHES YOUR AREA...SEEK SAFE SHELTER IN THE BASEMENT UNDER HEAVY FURNITURE OR IF NO BASEMENT WITHIN AN INTERIOR CLOSET. BOATERS ARE URGED TO HEAD FOR PORT TO ALLOW FOR PLENTY OF TIME TO REACH SAFE HARBOR. THE NATIONAL WEATHER SERVICE WILL CONTINUE TO MONITOR THIS DANGEROUS SITUATION AND WILL ISSUE ANOTHER STATEMENT AT AROUND 700 PM EDT. LOMBARDY
Special weather statement, Aug 28, 6:15 PM EDT, 56 minutes before
DEZ003-002-001-282300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON DE 604 PM EDT FRI AUG 28 1992 ...THUNDERSTORMS ABOUT TO ENTER INTO SOUTHEASTERN DELAWARE... ...A TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM EDT FOR DELAWARE... A TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM EDT THIS EVENING FOR THE STATE OF DELAWARE AND THE ADJACENT COASTAL WATERS. WEATHER RADAR SHOWED A LINE OF THUNDERSTORMS WERE MOVING ONTO MARYLANDS EASTERN SHORE AND WILL MOVE INTO SOUTHWESTERN DELAWARE WITHIN THE NEXT HALF AN HOUR. THESE STORMS HAVE PRODUCED TORNADOES FROM BALTIMORE TO PATUXENT RIVER MARYLAND AND ANOTHER WAS ALSO REPORTED 6 MILES EAST OF CAMBRIDGE MARYLAND. TREES AND POWER LINES WERE REPORTED DOWN IN CAMBRIDGE MARYLAND FROM THESE STORMS. LIGHTNING DETECTION SYSTEMS WERE ALSO SHOWING NUMEROUS CLOUD TO GROUND LIGHTNING STRIKES. PERSONS IN EXTREME SOUTHWEST DELAWARE SHOULD BE ON THE LOOKOUT FOR THE POSSIBILITY OF STRONG GUSTY WINDS...LARGE HAIL...AND POSSIBLY TORNADOES. IF THREATENING WEATHER APPROACHES YOUR AREA...SEEK SAFE SHELTER IN THE BASEMENT UNDER HEAVY FURNITURE OR IF NO BASEMENT WITHIN AN INTERIOR CLOSET. BOATERS ARE URGED TO HEAD FOR PORT TO ALLOW FOR PLENTY OF TIME TO REACSAFE HARBOR. THE NATIONAL WEATHER SERVICE WILL CONTINUE TO MONITOR THIS DANGEROUS SITUATION AND WILL ISSUE ANOTHER STATEMENT AT AROUND 700 PM EDT. LOMBARDY
Special weather statement, Aug 28, 6:44 PM EDT, 27 minutes before
PAZ007>012-016-NJ002>004-006-290300- SPECIAL WEATHER STATEMENT...SEVERE THUNDERSTORM/TORNADO WATCH NATIONAL WEATHER SERVICE PHILADELPHIA PA 630 PM EDT FRI AUG 28 1992 ...TORNADO WATCH IN EFFECT UNTIL 1 AM EDT SATURDAY FOR SOUTHEAST PENNSYLVANIA AND SOUTHERN NEW JERSEY...SEVERE THUNDERSTORM WATCH IN EFFECT FOR THE REMAINDER OF EASTERN PENNSYLVANIA UNTIL 11 PM EDT EXCEPT FOR THE NORTHERN COUNTIES THAT BORDER NEW YORK... SO AS NOT TO CONFUSE ANYONE...SEVERAL WATCHES INCLUDING TORNADO AND SEVERE THUNDERSTORMS...HAVE BEEN ISSUED FOR PENNSYLVANIA...NEW JERSEY ...DELAWARE...MARYLAND AND OTHER STATES FARTHER SOUTH. FOR FURTHER DETAILS WE SUGGEST THAT YOU CONSULT YOUR NEAREST NATIONAL WEATHER SERVICE OFFICE FOR ADDITIONAL STATEMENTS AND POSSIBLE WARNINGS. AT 630 PM RADAR SHOWED A LINE OF THUNDERSTORMS APPROACHING SOUTHEAST PENNSYLVANIA AND DELAWARE. THE STORMS HAVE CAUSED SERIOUS STREET FLOODING IN YORK COUNTY PENNSYLVANIA. IN ADDITION...OUR NEIGHBORING NATIONAL WEATHER SERVICE OFFICE IN WASHINGTON D.C. REPORTED SEVERAL TORNADO SIGHTINGS IN AND AROUND BALTIMORE MARYLAND...AND DAMAGE IN HOWARD AND SOUTHERN CARROL COUNTIES. THESE COUNTIES ARE CLOSE TO THE SOUTHERN PENNSYLVANIA BORDER. THUNDERSTORMS WILL BE MOVING INTO PHILADELPHIA AND VICINITY FROM THE SOUTHWEST AND ARE CAPABLE OF PRODUCING WIND GUSTS OF 70 MPH AS THEY PASS THROUGH. WHAT CAUSES TREE LIMBS TO SNAP AND SOME TREES TO FALL IS THE SUDDEN INCREASE IN SPEED AND THE QUICK CHANGE IN DIRECTION OF THE WIND. BE ON THE LOOKOUT FOR STORMS APPROACHING FROM THE SOUTHWEST AND BE PREPARED TO SEEK SHELTER IF THE SKY SUDDENLY TURNS OMINOUS. STAY TUNED FOR ADDITIONAL STATEMENTS AND POSSIBLE WARNINGS. EBERWINE
Special weather statement, Aug 28, 7:08 PM EDT, 3 minutes before
PAZ011-016- 290100 -
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ALLENTOWN PA
707 PM EDT FRI AUG 28 1992
...SEVERE THUNDERSTORM WATCH IN EFFECT FOR THE LEHIGH VALLEY AND
THE POCONOS UNTIL 11 PM EDT...
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH
FOR EASTERN PENNSYLVANIA THIS FRIDAY AFTERNOON AND EVENING UNTIL
11 PM EDT. THE WATCH INCLUDES LEHIGH...NORTHAMPTON...BERKS...CARBON
...SCHUYLKILL...MONROE AND PIKE COUNTIES.
AT 700 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED A LARGE AREA
OF SHOWERS AND EMBEDDED THUNDERSTORMS OVER EASTERN PENNSYLVANIA THAT
EXTENDS AS FAR EAST AS HAZELTON SOUTH TO READING. THE SHOWERS AND
THUNDERSTORMS ARE MOVING OVER SCHUYLKILL AND BERKS COUNTIES AND WILL
ENTER CARBON AND LEHIGH COUNTIES WITHIN THE HOUR. HEAVY RAIN AND
STRONG GUSTY WINDS NEAR 50 MPH ARE POSSIBLE WITH THESE THUNDERSTORMS.
REMEMBER THAT A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS
ARE FAVORABLE FOR SEVERE THUNDERSTORMS TO DEVELOP. IF THREATENING
WEATHER IS SIGHTED...GET TO A PLACE OF SAFETY IMMEDIATELY.
STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL RADIO AND TELEVISION
STATIONS FOR ANY ADDITIONAL INFORMATION ON THESE THUNDERSTORMS.
FUNKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 6:56 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 49 min |
| Aug 28, 7:47 PM EDT | Severe Thunderstorm Warning | PHI | Montgomery | 48 min |
| Aug 28, 7:57 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 38 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1992Every severe thunderstorm warning in 1992
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.