Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 7, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 9, 1993, 3:16 PM EDT for Bucks County, Pennsylvania. It was in force for 44 min.
The area
The counties it named.
The facts
- Issued
- Jun 9, 1993, 3:16 PM EDT (19:16 UTC)
- Expired
- Jun 9, 1993, 4:00 PM EDT
- In force
- 44 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
County Bucks County, PA
The nearest sounding before it
Atlantic City In, NJ (KACY), launched 12:00Z, 7.3 hours before the alert went out and 111 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
- 366 J/kg
- Mixed-layer CIN
- -215 J/kg
- Mixed-layer LCL
- 971 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPHL 091920 RRA SVRPHL PAC017-092000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHILADELPHIA PA 316 PM EDT WED JUN 9 1993 THE NATIONAL WEATHER SERVICE IN PHILADELPHIA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 400 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEAST PENNSYLVANIA ...NORTHERN BUCKS COUNTY AT 315 PM RADAR SHOWED A LINE OF THUNDERSTORMS FROM NEAR ALLENTOWN SOUTHWEST TO READING. ONE STORM IN PARTICULAR PRODUCED STRONG DAMAGING WINDS AT ALLENTOWN...PENNSYLVANIA. SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 55 MILES PER HOUR... LARGE HAIL...AND DEADLY LIGHTNING...AND SHORT TERMED VERY HEAVY RAINFALL. EBERWINE
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, Jun 9, 2:08 PM EDT, 1 hour 8 minutes before
PAZ>012-NJZ002-100000- SPECIAL WEATHER STATEMENT...THUNDERSORMS/HEAVY RAIN NATIONAL WEATHER SERVICE PHILADELPHIA PA 200 PM EDT WED JUN 09 1993 ...THUNDERSTORMS APPROACHING SOUTHEAST PENNSYLVANIA... AT 145 PM RADAR SHOWED A LINE OF THUNDERSTORMS STRETCHING FROM WILKES BARRE/SCRANTON IN NORTHEAST PENNSYLVANIA...SOUTHWEST TO NEAR HARRISBURG. THE LINE HAS BEEN MOVING TO THE SOUTHEAST 25 TO 30 MPH. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR A LARGE PART OF EASTERN PENNSYLVANIA EXCEPT THE UPPER SUSQUEHANNA VALLEY AND SOUTHEAST SECTIONS. SOME THUNDERSTORMS HAVE PRODUCED STRONG WINDS...VERY HEAVY RAIN AND THERE WAS A POSSIBLE TORNADO IN COLUMBIA COUNTY. SOME RAINFALL AMOUNTS HAVE TOPPED AN INCH AND COULD POSSIBLY EXCEED 3 INCHES IN SOME ISOLATED AREAS BETWEEN ALLENTOWN AND WILKES BARRE SCRANTON. PERSONS IN THE DELAWARE VALLEY SHOULD CONTINUE TO MONITOR LATER STATEMENTS IN THE EVENT A WATCH OR WARNING IS ISSUED LATER THIS AFTERNOON. 6 EBERWINE/MCCARTNEY
Special weather statement, Jun 9, 2:15 PM EDT, 1 hour 1 minute before
PAZ011-016- 092100 - SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALLENTOWN PA 215 PM EDT WED JUN 9 1993 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 6PM EDT FOR EAST CENTRAL PENNSYLVANIA AND THE POCONOS... AT 215 PM RADAR INDICATED A LINE OF STRONG THUNDERSTORMS APPROACHING THE NORTHWESTERN PORTIONS OF SCHUYLKILL AND CARBON COUNTIES. A WEATHER SPOTTER AT GORDON, NORTHWESTERN SCHUYLKILL COUNTY, REPORTS GUSTY WINDS ...VERY HEAVY RAIN AND SMALL HAIL. RADAR INDICATED A HEAVY THUNDERSTORM NEAR MAHANOY CITY IN NORTHERN SCHUYLKILL COUNTY AS WELL AS THE NORTHERN HALF OF CARBON COUNTY. THESE THUNDERSTORMS HAVE THE CAPABILITY OF PRODUCING SEVERE WEATHER AT ANY TIME. RESIDENTS OF EAST CENTRAL PENNSYLVANIA AND THE POCONOS SHOULD BE ALERT FOR THREATENING WEATHER APPROACHING FROM THE NORTHWEST OR WEST THIS AFTERNOON AND BE READY TO TAKE SHELTER. STAY TUNED TO NOAA WEATHER RADIO...LOCAL RADIO OR T.V. FOR FURTHER STATEMENTS OR POSSIBLE WARNINGS CONCERNING THIS WEATHER EVENT. LOEPER
Special weather statement, Jun 9, 2:18 PM EDT, 58 minutes before
PAZ011-016- 092100 - SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALLENTOWN PA 215 PM EDT WED JUN 9 1993 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 6PM EDT FOR EAST CENTRAL PENNSYLVANIA AND THE POCONOS... AT 215 PM RADAR INDICATED A LINE OF STRONG THUNDERSTORMS APPROACHING THE NORTHWESTERN PORTIONS OF SCHUYLKILL AND CARBON COUNTIES. A WEATHER SPOTTER AT GORDON, NORTHWESTERN SCHUYLKILL COUNTY, REPORTS GUSTY WINDS ...VERY HEAVY RAIN AND SMALL HAIL. RADAR INDICATED A HEAVY THUNDERSTORM NEAR MAHANOY CITY IN NORTHERN SCHUYLKILL COUNTY AS WELL AS THE NORTHERN HALF OF CARBON COUNTY. THESE THUNDERSTORMS HAVE THE CAPABILITY OF PRODUCING SEVERE WEATHER AT ANY TIME. RESIDENTS OF EAST CENTRAL PENNSYLVANIA AND THE POCONOS SHOULD BE ALERT FOR THREATENING WEATHER APPROACHING FROM THE NORTHWEST OR WEST THIS AFTERNOON AND BE READY TO TAKE SHELTER. STAY TUNED TO NOAA WEATHER RADIO...LOCAL RADIO OR T.V. FOR FURTHER STATEMENTS OR POSSIBLE WARNINGS CONCERNING THIS WEATHER EVENT. LOEPER
Special weather statement, Jun 9, 2:40 PM EDT, 36 minutes before
NJZ003-004-091945- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATLANTIC CITY NJ 240 PM EDT WED JUN 9 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FROM 300 PM TO 800 PM EDT FOR BURLINGTON AND OCEAN COUNTIES OF SOUTHERN NEW JERSEY AND ADJACENT COASTAL WATERS... AT 232 PM...OUR WEATHER SEARCH RADAR INDICATED SEVERE THUNDERSTORMS OVER EASTERN PENNSYLVANIA AND MIDDLE SUSQUEHANNA VALLEY OF PENNSYLVANIA. THE COUNTIES OF MONROE...LEHIGH...EASTERN SCHUYKILL AND WESTERN BERKS. SHOWERS AND THUNDERSTORMS...WITH VERY HEAVY RAIN...EXTENDED FROM SOUTHEAST NEW YORK STATE ACROSS NORTHWEST NEW JERSEY...NORTHEAST AND EASTERN PENNSYLVANIA...MIDDLE AND LOWER SUSQUEHANNA VALLEY OF PENNSYLVANIA. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOST TO THE WATCH AREA. PERSONS IN THE WATCH AREA SHOULD BE ON THE ALERT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENT OR WARNINGS. NO SEVERE WAETHER WAS INDICATED OVER SOUTHERN NEW JERSEY AT 230 PM THIS AFTERNOON. MOVEMENT OF THE THUNDERSTORMS WAS EAST AT 40 MILES AN HOUR. DIETZMANN/HAYES
Special weather statement, Jun 9, 2:53 PM EDT, 23 minutes before
PAZ009-011>12-NJZ002>004-006-100200- SPECIAL WEATHER STATEMENT...SEVERE THUNDERSTORM WATCH NATIONAL WEATHER SERVICE PHILADELPHIA PA 245 PM EDT WED JUN 09 1993 ...A SEVERE THUNDERSTORM WATCH ISSUED FOR SOUTHEAST PENNSYLVANIA AND SOUTHERN NEW JERSEY... THE NATIOAL WEATHER SERVICE HAS ISSUED ANOTHER SEVERE THUNDERSTORM WATCH FOR PARTS OF EAST CENTRAL AND SOUTHEAST PENNSYLVANIA AND A LARGE PART OF SOUTHERN NEW JERSEY. AT 230 PM RADAR SHOWED A LINE OF THUNDERSTORMS FROM NEAR HARRISBURG TO JUST TO THE NORTH OF ALLENTOWN. THE AIRMASS ACROSS THE SOUTHEAST PART OF PENNSYLVANIA AND SOUTHERN NEW JERSEY IS VERY HOT AND UNSTABLE...WITH SEVERAL MORE HOURS OF HEATING LEFT. THE THUNDERSTORMS WILL MOVE SOUTHEAST AND AFFECT THE DELAWARE VALLEY BETWEEN 5 AND 6 PM. WE HAVE HAD REPORTS OF VERY HEAVY RAIN...FREQEUNT CLOUD TO GROUND LIGHTNING STRIKES...STRONG WINDS AND EVEN A POSSIBLE TORNADO WITH THIS APPROACHING LINE OF STORMS. PERSONS TO THE NORTH OF PHILADELPHIA WILL EXPERIENCE THE STORM ABOUT AN HOUR EARLIER...AND EAST AND SOUTH OF THE CITY ABOUT AN HOUR AFTER. THE THUNDERSTORMS ARE MOVING SOUTHEAST AT 30 MPH. EBERWINE/MCCARTNEY/CLAVIN
Special weather statement, Jun 9, 2:53 PM EDT, 23 minutes before
NJZ003-004-091945- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATLANTIC CITY NJ 240 PM EDT WED JUN 9 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FROM 300 PM TO 800 PM EDT FOR BURLINGTON AND OCEAN COUNTIES OF SOUTHERN NEW JERSEY AND ADJACENT COASTAL WATERS... AT 232 PM...OUR WEATHER SEARCH RADAR INDICATED SEVERE THUNDERSTORMS OVER EASTERN PENNSYLVANIA AND MIDDLE SUSQUEHANNA VALLEY OF PENNSYLVANIA. THE COUNTIES OF MONROE...LEHIGH...EASTERN SCHUYKILL AND WESTERN BERKS. SHOWERS AND THUNDERSTORMS...WITH VERY HEAVY RAIN...EXTENDED FROM SOUTHEAST NEW YORK STATE ACROSS NORTHWEST NEW JERSEY...NORTHEAST AND EASTERN PENNSYLVANIA...MIDDLE AND LOWER SUSQUEHANNA VALLEY OF PENNSYLVANIA. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOST TO THE WATCH AREA. PERSONS IN THE WATCH AREA SHOULD BE ON THE ALERT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENT OR WARNINGS. NO SEVERE WAETHER WAS INDICATED OVER SOUTHERN NEW JERSEY AT 230 PM THIS AFTERNOON. MOVEMENT OF THE THUNDERSTORMS WAS EAST AT 40 MILES AN HOUR. DIETZMANN/HAYES
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 4:13 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Montgomery | 47 min |
| Jun 9, 4:30 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 45 min |
| Jun 9, 7:43 PM EDT | Severe Thunderstorm Warning | PHI | Montgomery, Philadelphia | 62 min |
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.