Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 25, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 14, 1993, 3:00 PM EDT for Delaware County, Montgomery County, Philadelphia County, Pennsylvania. It was in force for 45 min.
The area
The counties it named.
The facts
- Issued
- Jul 14, 1993, 3:00 PM EDT (19:00 UTC)
- Expired
- Jul 14, 1993, 3:45 PM EDT
- In force
- 45 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The nearest sounding before it
Atlantic City In, NJ (KACY), launched 12:00Z, 7.0 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.
- Mixed-layer CAPE
- 8 J/kg
- Mixed-layer CIN
- -155 J/kg
- Mixed-layer LCL
- 1723 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 70 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 141903 RRA SVRPHL PAC045-091-101-141945- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHILADELPHIA PA 300 PM EDT WED JUL 14 1993 THE NATIONAL WEATHER SERVICE IN PHILADELPHIA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 345 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHEAST PENNSYLVANIA ...NORTHERN DELAWARE COUNTY...EASTERN MONTGOMERY COUNTY ...PHILADELPHIA COUNTY AT 300 PM...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM IN THE VICINITY OF UPPER MARION TOWNSHIP IN EASTERN MONTGOMERY COUNTY. THIS THUNDERSTORM IS MOVING NORTHEAST AT 15 TO 20 MPH...AND IT SHOULD AFFECT PARTS OF NORTHERN DELAWARE...EASTERN MONTGOMERY...AND PHILADELPHIA COUNTIES BETWEEN NOW AND 345 PM. THIS IS A DANGEROUS STORM. IF YOU ARE IN THE WARNED AREA...PREPARE FOR STRONG DAMAGING WINDS...LARGE HAIL...VERY HEAVY RAIN AND DEADLY LIGHTNING. SHOULD THE STORM APPROACH YOU...SEEK IMMEDIATE SHELTER INDOORS...BUT DO NOT STAND NEAR WINDOWS. A SEVERE THUNDERSTORM WATCH CONTINUES FOR SOUTHEASTERN PENNSYLVANIA AND SOUTHERN NEW JERSEY UNTIL 9 PM EDT. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODOCE TORNADOES WITnH LITTLE OR NO WARNING. $$ IOVINO
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 14, 2:15 PM EDT, 45 minutes before
PAZ011-016- 142000 - SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALLENTOWN PA 215 PM EDT WED JUL 14 1993 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR EAST CENTRAL PENNSYLVANIA AND THE POCONOS UNTIL 9PM THIS EVENING... AT 215PM RADAR INDICATED AN AREA OF HEAVY THUNDERSTORMS EXTENDING FRON JUST NORTHEAST OF TRENTON, NJ WEST ACROSS BUCKS COUNTY AND SOUTHERN BERKS COUNTY NEAR READING AND THEN SOUTH SOUTHWEST THROUGH LANCASTER COUNTY AND INTO NORTHEASTERN MARYLAND. THE HEAVIEST OF THESE THUNDERSTORMS WERE FROM JUST EAST OF READING SOUTH SOUTHWEST INTO LANCASTER COUNTY. MOVEMENT WAS TOWARD THE EAST AT AROUND 15 MPH. THESE STORMS COMTAIN HEAVY DOWNPOURS AND DUE TO THEIR SLOW MOVEMENT...LOCALIZED FLOODING OF STREETS AND SMALL STREAMS MAY RESULT. AS WITH ALL THUNDERSTORMS...DANGEROUS LIGHTNING...GUSTY WINDS AND POSSIBLE HAIL MAY ACCOMPANY THEIR PASSAGE. LOEPER
Special weather statement, Jul 14, 2:18 PM EDT, 42 minutes before
PAZ011-016- 142000 - SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALLENTOWN PA 215 PM EDT WED JUL 14 1993 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR EAST CENTRAL PENNSYLVANIA AND THE POCONOS UNTIL 9PM THIS EVENING... AT 215PM RADAR INDICATED AN AREA OF HEAVY THUNDERSTORMS EXTENDING FRON JUST NORTHEAST OF TRENTON, NJ WEST ACROSS BUCKS COUNTY AND SOUTHERN BERKS COUNTY NEAR READING AND THEN SOUTH SOUTHWEST THROUGH LANCASTER COUNTY AND INTO NORTHEASTERN MARYLAND. THE HEAVIEST OF THESE THUNDERSTORMS WERE FROM JUST EAST OF READING SOUTH SOUTHWEST INTO LANCASTER COUNTY. MOVEMENT WAS TOWARD THE EAST AT AROUND 15 MPH. THESE STORMS COMTAIN HEAVY DOWNPOURS AND DUE TO THEIR SLOW MOVEMENT...LOCA2LIZED FLOODING OF STREETS AND SMALL STREAMS MAY RESULT. AS WITH ALL THUNDERSTORMS...DANGEROUS LIGHTNING...GUSTY WINDS AND POSSIBLE HAIL MAY ACCOMPANY THEIR PASSAGE. LOEPER
Special weather statement, Jul 14, 2:35 PM EDT, 25 minutes before
NJZ003-004-006-NJZ501-DEZ501-071900- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATLANTIC CITY NJ 235 PM EDT WED JUL 14 1993 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR ALL OF NEW JERSEY INCLUDING THE COASTAL WATERS UNTIL 9 PM EDT... AT 235 PM...WEATHER SERVICE RADAR SHOWED THUNDERSTORMS WITH VERY HEAVY RAIN OVER SOUTHEAST PENNSYLVANIA...MOST OF CENTRAL NEW JERSEY AND THE WESTERN PORTIONS OF SOUTHERN NEW JERSEY. THE HEAVIEST THUNDERSTORM WAS ON THE BORDER OF GLOUSTER AND CAMDEN COUNTIES OF NEW JERSEY. THIS STORM HAS PRODUCED LARGE HAIL. MOVEMENT WAS TO THE EAST AT LITTLE MORE THAN 15 MILES AN HOUR. VMN
Special weather statement, Jul 14, 2:35 PM EDT, 25 minutes before
NJZ003-004-006-NJZ501-DEZ501-071900- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATLANTIC CITY NJ 235 PM EDT WED JUL 14 1993 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR ALL OF NEW JERSEY INCLUDING THE COASTAL WATERS UNTIL 9 PM EDT... AT 235 PM...WEATHER SERVICE RADAR SHOWED THUNDERSTORMS WITH VERY HEAVY RAIN OVER SOUTHEAST PENNSYLVANIA...MOST OF CENTRAL NEW JERSEY AND THE WESTERN PORTIONS OF SOUTHERN NEW JERSEY. THE HEAVIEST THUNDERSTORM WAS ON THE BORDER OF GLOUSTER AND CAMDEN COUNTIES OF NEW JERSEY. THIS STORM HAS PRODUCED LARGE HAIL. MOVEMENT WAS TO THE EAST AT LITTLE MORE THAN 15 MILES AN HOUR. VMN
Special weather statement, Jul 14, 2:46 PM EDT, 14 minutes before
DEC001-003-005-150145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON DE 246 PM EDT WED JUL 14 1993 ...SEVERE THUNDERSTORM WATCH FOR ALL COUNTIES OF DELAWARE... ...EFFECTIVE UNTIL 9 PM EDT... A SEVERE THUNDERSTORM WATCH HAD BEEN ISSUED FOR THE PEOPLE OF NEW CASTLESUSSEX, AND KENT COUNTIES UNTIL 9 PM EDT. SEVERE THUNDERSTORMS PRODUCE LARGE DAMAGING HAIL OF AT LEAST 3/4 OF AN INCH IN DIAMETER OR LARGER...DAMAGING THUNDERSTORM WINDS OF AT LEAST 58 MPH OR GREATER AND DANGEROUS CLOUD TO GROUND LIGHTNING. REMEMBER... A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. TOWNSEND & WWUS35KDSM ,DU
Special weather statement, Jul 14, 2:46 PM EDT, 14 minutes before
DEC001-003-005-150145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON DE 246 PM EDT WED JUL 14 1993 ...SEVERE THUNDERSTORM WATCH FOR ALL COUNTIES OF DELAWARE... ...EFFECTIVE UNTIL 9 PM EDT... A SEVERE THUNDERSTORM WATCH HAD BEEN ISSUED FOR THE PEOPLE OF NEW CASTLESUSSEX, AND KENT COUNTIES UNTIL 9 PM EDT. SEVERE THUNDERSTORMS PRODUCE LARGE DAMAGING HAIL OF AT LEAST 3/4 OF AN INCH IN DIAMETER OR LARGER...DAMAGING THUNDERSTORM WINDS OF AT LEAST 58 MPH OR GREATER AND DANGEROUS CLOUD TO GROUND LIGHTNING. REMEMBER... A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. TOWNSEND & WWUS35KDSM ,DU
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1993Every severe thunderstorm warning in 1993
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.