Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1992
Severe Thunderstorm Warning 38, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 17, 1992, 9:03 PM EDT for Montgomery County, Philadelphia County, Pennsylvania. It was in force for 42 min.
The area
The counties it named.
The facts
- Issued
- Jul 17, 1992, 9:03 PM EDT (01:03 UTC)
- Expired
- Jul 17, 1992, 9:45 PM EDT
- In force
- 42 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties Montgomery County, PA, Philadelphia County, PA
The nearest sounding before it
Atlantic City In, NJ (KACY), launched 00:00Z, 1.1 hours before the alert went out and 97 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
- 1825 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 887 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPHL 180104 SVRPHL PAC091-101-180145- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHILADELPHIA PA 903 PM EDT FRI JUL 17 1992 THE NATIONAL WEATHER SERVICE IN PHILADELPHIA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 945 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHEAST PENNSYLVANIA ...SOUTHERN MONTGOMERY COUNTY...PHILADELPHIA COUNTY AT 900 PM...NATIONAL WEATHER SERVICE RADAR INDICATED A THUNDERSTORM OVER DELAWARE COUNTY. THIS STORM IS MOVING TO THE EAST NORTHEAST AT AROUND 25 MPH AND IT IS EXPECTED TO MOVE ACROSS PHILADELPHIA AND SOUTHERN MONTGOMERY COUNTIES BETWEEN NOW AND 945 PM. THIS STORM HAS HAD A HISTORY OF PRODUCING STRONG WIND GUSTS AND HAIL. 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...BU8T DO NOT STAND NEAR WINDOWS. MOBILE HOMES ARE MOST VULNERABLE TO HIGH WINDS AND SHOULD BE AVOIDED. 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 17, 6:13 PM EDT, 2 hours 50 minutes before
PAZ012-NJZ002-004-006-180100-
SPECIAL WEATHER STATEMENT - SEVERE THUNDERSTORM WATCH
NATIONAL WEATHER SERVICE PHILADELPHIA PA
610 PM EDT FRI JUL 17 1992
...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 11 PM FOR
THE PHILADELPHIA METROPOLITAN AREA...
AT 6 PM NO SEVERE WEATHER WAS OCCURRING IN THE PHILADELPHIA
METROPOLITAN AREA.
THE CLOSEST PRECIPITATION WAS A SMALL AREA OF SHOWERS ALONG THE
CAMDEN...BURLINGTON COUNTY BORDER NEAR CHERRY HILL NEW JERSEY.
WEATHER SERVICE RADAR ALSO SHOWED SHOWERS AND THUNDERSTORMS
IN LANCASTER AND EASTERN YORK COUNTIES OF PENNSYLVANIA AND IN
NEIGHBORING CARROL COUNTY IN MARYLAND. THESE SHOWERS AND THUNDERSTORMS
WILL MOVE EAST INTO CHESTER COUNTY BEFORE 7 PM. THE STRONGEST
THUNDERSTORMS ARE OCCURRING ALONG AND NEAR THE PENNSYLVANIA...MARYLAND
BORDER.
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS THUNDERSTORMS WITH WIND
GUSTS OF OVER 58 MPH AND LARGE HAIL ARE POSSIBLE IN AND NEA<R THE
WATCH AREA. STAY TUNED TO NOAA WEATHER RADIO OR TO YOUR LOCAL
RADIO OR TELEVISION STATION FOR ADDITIONAL INFORMATION AND FOR ANY
WARNINGS WHICH MAY BE ISSUED.
SPSpecial weather statement, Jul 17, 6:51 PM EDT, 2 hours 12 minutes before
NJZ003-004-006-172345- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATLANTIC CITY, NJ 632 PM EDT FRI JUL 17 1992 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR SOUTHERN NEW JERSEY AND ADJACENT COASTAL WATERS EXCEPT FOR OCEAN COUNTY UNTIL 11 PM EDT... AT 632 PM...RADAR DETECTED STRONG THUNDERSTORMS WITH VERY HEAVY RAINS ...STRONG GUSTY WINDS AND HAIL IN NORTHEAST MARYLAND HARFORD COUNTY JUST NORTH OF BEL AIR. ALSO A STORM WITH REPORTED TORNADO ACTIVITY WAS INDICATED IN THE LOWER SUSQUEHANNA VALLEY OF PENNSYLVANIA LEBANON COUNTY JUST SOUTH OF LEBANON. OTHER SHOWERS AND THUNDERSTORMS WERE SCATTERED FROM THE MIDDLE AND LOWER SUSQUEHANNA VALLEY OF PENNSYLVANIA INTO NORTHERN MARYLAND. MOVEMENT WAS EAST AT 20 TO 25 MPH. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PEOPLE IN THE WATCH AREA SHOULD BE ON THE LOOKOUT FOR THREATENING WE"ATHER IF IT APPROACHES AND BE PREPARED TO SEEK SHELTER IMMEDIATELY. LISTEN TO NOAA WEATHER RADIO OR LOCAL RADIO AND TV STATION FOR LATER STATEMENTS OR POSSIBLE WARNINGS. DIETZMANN/SCURA
Special weather statement, Jul 17, 7:45 PM EDT, 1 hour 18 minutes before
NJZ003-004-006-180045- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATLANTIC CITY, NJ 731 PM EDT FRI JUL 17 1992 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR SOUTHERN NEW JERSEY AND ADJACENT COASTAL WATERS EXCEPT FOR OCEAN COUNTY UNTIL 11 PM EDT... AT 731 PM...RADAR DETECTED STRONG THUNDERSTORMS WITH VERY HEAVY RAINS ...STRONG GUSTY WINDS AND DAMAGING HAIL AND TORNADO ACTIVITY IN EXTREME SOUTHER LANACASTER AND CHESTER COUNTIES SOUTHEAST PENNSYLVANIA AND IN WESTERN BERKS COUNTY LOWER SUSQUEHANNA VALLEY OF PENNSYLVANIA. THESE STORMS WILL BE CROSSING BERKS AND CHESTER COUNTIES DURING THE HOUR. OTHER SHOWERS AND THUNDERSTORMS...WITH VERY HEAVY RAINS...WERE SCATTERED FROM THE MIDDLE AND LOWER SUSQUEHANNA VALLEY OF PENNSYLVANIA IN EASTERN AND SOUTHEAST PENNSYLVANIA. MOVEMENT WAS EAST AT 20 TO 25 MILES AN HOUR. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PEOPLE IN THE WATCH AREA SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER IF IT APPROACHES AND BE PREPARED TO SEEK SHELTER IMMEDIATELY. LISTEN TO NOAA WEATHER RADIO OR LOCAL RADIO AND TV STATION FOR LATER STATEMENTS OR POSSIBLE WARNINGS. DIETZMANN/SCURA
Special weather statement, Jul 17, 8:11 PM EDT, 52 minutes before
DEZ003-002-001-180115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON DE 807 PM EDT FRI JUL 17 1992 ...SEVERE THUNDERSTORM WATCH CANCELED... AT 8 PM THE SEVERE THUNDERSTORM WATCH FOR DELAWARE AND COASTAL WATERS WAS CANCELED. A THUNDERSTORM WAS MOVING JUST TO THE NORTH OF DELAWARE ALONG THE PENNSYLVANIA BORDER. THIS WILL BE THE LAST STATEMENT ON THIS STORM. ROETS
Special weather statement, Jul 17, 8:35 PM EDT, 28 minutes before
PAZ012-NJZ002-004-006-180100-
SPECIAL WEATHER STATEMENT - THUNDERSTORMS
NATIONAL WEATHER SERVICE PHILADELPHIA PA
830 PM EDT FRI JUL 17 1992
...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 11 PM FOR
THE PHILADELPHIA METROPOLITAN AREA...
AT 830 PM WEATHER SERVICE RADAR SHOWED SCATTERED SHOWERS AND
THUNDERSTORMS IN SOUTHEAST PENNSYLVANIA AND SOUTHERN NEW JERSEY.
IN THE PHILADELPHIA METROPOLITAN AREA THE STRONGEST THUNDERSTORMS
WERE IN SOUTHEAST CHESTER COUNTY MOVING TOWARD DELAWARE COUNTY.
ANOTHER AREA OF THUNDERSTORMS IN SOUTHERN LANCASTER COUNTY SHOULD
MOVE INTO CHESTER COUNTY BEFORE 9 PM.
THERE WAS ALSO AN AREA OF SEVERE THUNDERSTORMS IN BERKS COUNTY
THAT WAS CAUSING STRONG WINDS...HAIL...AND TORRENTIAL DOWNPOURS.
THESE THUNDERSTORMS WILL BE MONITORED CLOSELY AS THEY MOVE EAST
TOWARD UPPER BUCKS AND MONTGOMERY COUNTIES.
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS THUNDERSTORMS WITH WIND
GUSTS OF OVER 58 MPH AND LARGE HAIL ARE POSSIBLE IN AND NEAR THE
WATCH AREA. STAY TUNED TO NOAA WEATHER RADIO OR TO YOUR LOCAL
RADIO OR TELEVISION STATION FOR ADDITIONAL INFORMATION AND FOR ANY
WARNINGS WHICH MAY BE ISSUED.
SPSpecial weather statement, Jul 17, 8:49 PM EDT, 14 minutes before
NJZ003-004-006-180145- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATLANTIC CITY, NJ 830 PM EDT FRI JUL 17 1992 ...SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT FOR BURLINGTON COUNTY SOUTHERN NEW JERSEY UNTIL 11 PM EDT... AT 830 PM...RADAR DETECTED STRONG THUNDERSTORMS WITH VERY HEAVY RAINS ...STRONG GUSTY WINDS...DAMAGING HAIL...POSSIBLE TORNADO ACTIVITY AND FREQUENT DANGEROUS LIGHTNING IN SOUTHEAST PENNSYLVANIA LANCASTER AND CHESTER COUNTIES...BERKS COUNTY EAST CENTRAL PENNSYLVANIA. THESE STORMS WILL BE APPROACHING THE PHILADELPHIA AREA...CONTINUE OVER CHESTER COUNTY AND TOWARD ALLENTOWN EASTERN PENNSYLVANIA. ONE INCH HAIL HAS BEEN REPORTED IN WEST CHESTER. OTHER SHOWERS AND THUNDERSTORMS...WITH VERY HEAVY RAINS...WERE SCATTERED FROM THE UPPER INTO THE MIDDLE AND LOWER SUSQUEHANNA VALLIES OF PENNSYLVANIA...NORTHEAST INTO EASTERN AND SOUTHEAST PENNSYLVANIA. A FEW LIGHT SHOWERS HAVE MOVED INTO THE EXTREME WESTERN PORTIONS OF SOUTHERN NEW JERSEY FROM WOODBUTY TO TRENTON. REMEMBER...A SEVERE THUNDERSTORM WATCH MEAN THUNDERSTORM CONDITIONS ARE FAVORABLE FOR SEVERE WEATHER TO DEVELOP IN OR NEAR THE WATCH AREA. PERSONS IN OR NEAR THE WATCH AREA SHOUHLD BE ON THE LOOKOUT FOR THREATENING WEATHER AND IF IT APPRAOCHES SHOULD BE PREPARED TO SEEK SHELTER IMMEDIATELY. LISTEN TO NOAA WEATHER RADIO OR LOCAL RADIO AND TV STATION FOR LATER STATEMENTS OR POSSIBLE WARNINGS. DIETZMANN/SCURA
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 8:34 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 41 min |
| Jul 17, 8:41 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 64 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.