Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 81, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 26, 1994, 2:26 PM EDT for Chester County, Pennsylvania. It was in force for 64 min.
The area
The counties it named.
The facts
- Issued
- Jul 26, 1994, 2:26 PM EDT (18:26 UTC)
- Expired
- Jul 26, 1994, 3:30 PM EDT
- In force
- 64 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
County Chester County, PA
The nearest sounding before it
Atlantic City In, NJ (KACY), launched 12:00Z, 6.4 hours before the alert went out and 122 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
- 914 J/kg
- Mixed-layer CIN
- -79 J/kg
- Mixed-layer LCL
- 985 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPHL 261829 RRA SVRPHL PAC029-261930- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ 226 PM EDT TUE JUL 26 1994 THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 330 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEAST PENNSYLVANIA ...CHESTER COUNTY AT 225 PM RADAR SHOWED A LINE OF VERY HEAVY THUNDERSTORMS ALONG THE LANCASTER/CHESTER COUNTY LINE AND THEY CONTINUE TO INTENSITY. A REPORT WAS RECEIVED FROM VALLEY TOWNSHIP OF 1/2 TO 3/4 INCH HAIL AND TORRENTIAL RAIN. THE STORM WAS MOVING SLOWLY NORTHEAST 15 TO 20 MPH. 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. MOBILE HOMES ARE MOST VULNERABLE TO HIGH WINDS AND SHOULD BE AVOIDED. 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, Jul 26, 1:45 PM EDT, 41 minutes before
NJZ019>026-501-260115- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATLANTIC CITY NJ 145 PM EDT TUE JUL 26 1994 ...SEVERE THUNDERSTORM WATCH FOR ALL OF NEW JERSEY UNTIL 9 PM... AT 130 PM...THE ATLANTIC CITY WEATHER RADAR SHOWED NUMEROUS SHOWERS AND THUNDERSTORMS OVER SOUTHERN NEW JERSEY...SOUTHEAST MARYLAND AND SOUTHEASTERN PENNSYLVANIA. THESE STORMS HAVE THE POSSIBILTY OF PRODUCING STRONG WINDS...SMALL HAIL...DEADLY LIGHTNING AND VERY HEAVY RAINS. THE WATCH INCLUDES THE COUNTIES OF ATLANTIC...CAPE MAY...OCEAN CUMBERLAND...BURLINGTON AND THE ADJOINING COASTAL WATERS. THE MOVEMENT WAS TOWARD THE NORTHEAST AROUND 25 MILES AN HOUR. PM
Special weather statement, Jul 26, 1:56 PM EDT, 30 minutes before
NJZ019>026-501-260115- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATLANTIC CITY NJ 145 PM EDT TUE JUL 26 1994 ...SEVERE THUNDERSTORM WATCH FOR ALL OF NEW JERSEY UNTIL 9 PM... AT 130 PM...THE ATLANTIC CITY WEATHER RADAR SHOWED NUMEROUS SHOWERS AND THUNDERSTORMS OVER SOUTHERN NEW JERSEY...SOUTHEAST MARYLAND AND SOUTHEASTERN PENNSYLVANIA. THESE STORMS HAVE THE POSSIBILTY OF PRODUCING STRONG WINDS...SMALL HAIL...DEADLY LIGHTNING AND VERY HEAVY RAINS. THE WATCH INCLUDES THE COUNTIES OF ATLANTIC...CAPE MAY...OCEAN CUMBERLAND...BURLINGTON AND THE ADJOINING COASTAL WATERS. THE MOVEMENT WAS TOWARD THE NORTHEAST AROUND 25 MILES AN HOUR. PM
Special weather statement, Jul 26, 2:05 PM EDT, 21 minutes before
PAZ058-060>062-262000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALLENTOWN PA 205 PM EDT TUE JUL 26 1994 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR ALL OF EAST CENTRAL PENNSYLVANIA AND THE POCONOS UNTIL 9PM THIS EVENING... A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR BERKS...LEHIGH AND NORTHAMPTON COUNTIES AS WELL AS CARBON...SCHUYLKILL...MONROE AND PIKE COUNTIES UNTIL 9PM THIS EVENING. A COLD FRONT OVER WESTERN PENNSYLVANIA IS MOVING EASTWARD INTO THE HUMID AND UNSTABLE AIR ACROSS EASTERN PENNSYLVANIA. CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF STRONG AND SEVERE THUNDERSTORMS ACROSS EASTERN AND SOUTHERN PENNSYLVANIA AS WELL AS MUCH OF NEW JERSEY. NATIONAL WEATHER SERVICE RADAR AT 155PM WAS SHOWING A BAND OF SHOWERS AND THUNDERSTORMS EXTENDING FROM NORTHERN VIRGINIA NORTHEASTWARD THROUGH THE SUSQUEHANNA VALLEY...PORTIONS OF EAST CENTRAL PENNSYLVANIA...THE POCONOS ...AND THE NORTHEASTERN CORNER OF PENNSYLVANIA. THE STORMS ARE MOVING NORTHEAST AT 30 MILES PER HOUR. THE STRONGEST STORMS WERE LOCATED FROM READING TO LANCASTER. THESE STORMS HAVE HAD A HISTORY OF PRODUCING CLOUD TO GROUND LIGHTNING AND GUSTY WINDS. SEEK SHELTER IF THREATENING WEATHER APPROACHES. DO NOT USE UNNECESSARY ELECTRICAL APPLIANCES...INCLUDING THE TELEPHONE UNLESS IT IS AN EMERGENCY. STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER STATEMENTS OR POSSIBLE WARNINGS. MILLER
Special weather statement, Jul 26, 2:07 PM EDT, 19 minutes before
PAZ058-060>062-262000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALLENTOWN PA 205 PM EDT TUE JUL 26 1994 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR ALL OF EAST CENTRAL PENNSYLVANIA AND THE POCONOS UNTIL 9PM THIS EVENING... A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR BERKS...LEHIGH AND NORTHAMPTON COUNTIES AS WELL AS CARBON...SCHUYLKILL...MONROE AND PIKE COUNTIES UNTIL 9PM THIS EVENING. A COLD FRONT OVER WESTERN PENNSYLVANIA IS MOVING EASTWARD INTO THE HUMID AND UNSTABLE AIR ACROSS EASTERN PENNSYLVANIA. CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF STRONG AND SEVERE THUNDERSTORMS ACROSS EASTERN AND SOUTHERN PENNSYLVANIA AS WELL AS MUCH OF NEW JERSEY. NATIONAL WEATHER SERVICE RADAR AT 155PM WAS SHOWING A BAND OF SHOWERS AND THUNDERSTORMS EXTENDING FROM NORTHERN VIRGINIA NORTHEASTWARD THROUGH THE SUSQUEHANNA VALLEY...PORTIONS OF EAST CENTRAL PENNSYLVANIA...THE POCONOS ...AND THE NORTHEASTERN CORNER OF PENNSYLVANIA. THE STORMS ARE MOVING NORTHEAST AT 30 MILES PER HOUR. THE STRONGEST STORMS WERE LOCATED FROM READING TO LANCASTER. THESE STORMS HAVE HAD A HISTORY OF PRODUCING CLOUD TO GROUND LIGHTNING AND GUSTY WINDS. SEEK SHELTER IF THREATENING WEATHER APPROACHES. DO NOT USE UNNECESSARY ELECTRICAL APPLIANCES...INCLUDING THE TELEPHONE UNLESS IT IS AN EMERGENCY. STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER STATEMENTS OR POSSIBLE WARNINGS. MILLER
Special weather statement, Jul 26, 2:22 PM EDT, 4 minutes before
PAZ067-071-262200- SPECIAL WEATHER STATEMENT - THUNDERSTORMS NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ 222 PM EDT TUE JUL 26 1994 ...THUNDERSTORMS DEVELOPING RAPIDLY OVER SOUTHEAST PENNSYLVANIA... AT 215 PM RADAR SHOWED RAPIDLY DEVELOPING THUNDERSTORMS IN SOUTHEAST PENNSYLVANIA WITH THE HEAVIEST ALONG THE LANCASTER/CHESTER COUNTY LINE. RADAR SHOWED THE STRONGEST STORM BETWEEN HIGHWAYS 30 AND 1 OR JUST TO THE WEST OF COATSVILLE. THE STORMS WERE MOVING TO THE NORTHEAST AT 20 MPH. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR CHESTER COUNTY AS WELL AS A GOOD PART OF SOUTHEAST PENNSYLVANIA UNTIL 9 PM EDT. ANY STORMS THAT DO FORM COULD PRODUCE DAMAGING WINDS...HAIL...VERY HEAVY RAIN AND FREQUENT LIGHTNING. MANY OTHER STORMS WILL BE FORMING FOR THE REST OF THE AFTERNOON AND EVENING HOURS. SO STAY TUNED FOR ADDITIONAL STATEMENTS AND POSSIBLE WARNINGS. EBERWINE
Special weather statement, Jul 26, 2:24 PM EDT, 2 minutes before
PAZ067-071-262200- SPECIAL WEATHER STATEMENT - THUNDERSTORMS NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ 222 PM EDT TUE JUL 26 1994 ...THUNDERSTORMS DEVELOPING RAPIDLY OVER SOUTHEAST PENNSYLVANIA... AT 215 PM RADAR SHOWED RAPIDLY DEVELOPING THUNDERSTORMS IN SOUTHEAST PENNSYLVANIA WITH THE HEAVIEST ALONG THE LANCASTER/CHESTER COUNTY LINE. RADAR SHOWED THE STRONGEST STORM BETWEEN HIGHWAYS 30 AND 1 OR JUST TO THE WEST OF COATSVILLE. THE STORMS WERE MOVING TO THE NORTHEAST AT 20 MPH. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR CHESTER COUNTY AS WELL AS A GOOD PART OF SOUTHEAST PENNSYLVANIA UNTIL 9 PM EDT. ANY STORMS THAT DO FORM COULD PRODUCE DAMAGING WINDS...HAIL...VERY HEAVY RAIN AND FREQUENT LIGHTNING. MANY OTHER STORMS WILL BE FORMING FOR THE REST OF THE AFTERNOON AND EVENING HOURS. SO STAY TUNED FOR ADDITIONAL STATEMENTS AND POSSIBLE WARNINGS. EBERWINE
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1994Every severe thunderstorm warning in 1994
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.