A cold front helped develop a line of showers and thunderstorms that moved through Eastern Pennsylvania during the evening of the 25th. A couple of thunderstorms in the Lehigh Valley became severe with damaging winds and large hail.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS PHI wrote it up.
A cold front helped develop a line of showers and thunderstorms that moved through Eastern Pennsylvania during the evening of the 25th. A couple of thunderstorms in the Lehigh Valley became severe with damaging winds and large hail.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Philadelphia/Mount Holly wrote its last area forecast discussion before the first event at Jun 25, 6:31 PM EST, 39 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 731 PM EDT WED JUN 25 2014 .SYNOPSIS... A LOW PRESSURE SYSTEM AND ASSOCIATED COLD FRONT WILL SLOWLY CROSS THE REGION TONIGHT. THE LOW WILL MOVE TO THE EAST ON THURSDAY... WHILE HIGH PRESSURE BEGINS TO BUILD IN FROM THE GREAT LAKES REGION. THIS HIGH WILL REMAIN OVER THE AREA THIS WEEKEND AND INTO EARLY NEXT WEEK. ANOTHER COLD FRONT WILL ARRIVE FOR THE MIDDLE OF NEXT WEEK. && .NEAR TERM /UNTIL 6 AM THURSDAY MORNING/... ESTF UPDATE MAINLY FOR TIMING ADJUSTMENTS OF THE HEAVIEST PCPN. ITS CLOSE TO A WRF/COSPA COMPROMISE AS THE LATEST ONE OR TWO HRRR SEEM LOGICAL. THE BELOW MENTIONED SHORT WAVE COUPLED NEAR 90F AIR ENTRAINED INTO IT IS SUSTAINING AND ENHANCING THE CONVECTION FOR NOW. THE THERMODYNAMIC AND KINEMATIC ENVIRONMENT COULD BE MORE SUPPORTIVE AS MID LEVEL LAPSE RATES ARE POOR, MODERATE BULK SHEAR AND ITS FAIRLY WARM AT 500MB. SO OVER THE NEXT COUPLE OF HOURS WE WILL HAVE TO WATCH OUT FOR ISOLATED SEVERE (WE ADDED SOME GUSTY WINDS TO THE GRIDS), OTHERWISE A MAINLY HEAVY DRENCHING RAIN CONCERN THAT SHOULD LESSEN TOWARD AND AFTER MIDNIGHT. A MID LEVEL SHORT WAVE LOCATED OVER WEST VIRGINIA AND VICINITY THIS AFTERNOON WILL CONTINUE TO PROGRESS SLOWLY TO THE EAST NORTHEAST AND IT SHOULD PASS OVERHEAD LATE TONIGHT. THE APPROACHING SHORT WAVE IN COMBINATION WITH DAYTIME HEATING AND ABUNDANT LOW LEVEL MOISTURE WILL CONTINUE TO RESULT IN THE DEVELOPMENT OF SCATTERED SHOWERS AND THUNDERSTORMS IN OUR REGION INTO THIS EVENING. PRECIPITABLE WATER VALUES WILL REMAIN NEAR 2 INCHES SO LOCALLY HEAVY RAINFALL REMAINS POSSIBLE. FLOODING MAY RESULT IN AREAS OF POOR DRAINAGE AND ALONG SMALL STREAMS AND CREEKS. THE THUNDERSTORM ACTIVITY MAY WANE AFTER DARK WITH THE LOSS OF DAYTIME HEATING. HOWEVER, SHOWERS ARE EXPECTED TO LINGER THROUGH MUCH OF THE NIGHT AS A SURFACE BOUNDARY DROPS INTO OUR REGION FROM THE NORTHWEST. MINIMUM TEMPERATURES ARE EXPECTED TO BE MAINLY IN THE UPPER 60S AND LOWER 70S. && .SHORT TERM /6 AM THURSDAY MORNING THROUGH 6 PM THURSDAY/... THE FRONTAL BOUNDARY IS FORECAST TO BE SLOW TO MOVE OFF THE COAST ON THURSDAY. LINGERING LOW LEVEL MOISTURE IN THE MORNING SHOULD RESULT IN CLOUDS, AS WELL AS SCATTERED TO ISOLATED SHOWERS MAINLY IN NEW JERSEY. THE DECREASE IN CLOUD COVER DURING THE LATE MORNING AND AFTERNOON SHOULD ALLOW TEMPERATURES TO CLIMB WELL INTO THE 80S AT MOST LOCATIONS. A WEST TO NORTHWEST WIND IS EXPECTED TO BRING A SLOW DRYING TREND WITH DEW POINT READINGS DROPPING INTO THE LOWER AND MIDDLE 60S DURING THE AFTERNOON. && .LONG TERM /THURSDAY NIGHT THROUGH WEDNESDAY/... THE UPPER AIR PATTER WILL CONSIST OF A RIDGE BUILDING UP ACROSS THE MIDDLE ATLANTIC AND NORTHEAST FRIDAY THROUGH SUNDAY. THE RIDGE WILL REMAIN IN PLACE EARLY NEXT WEEK...BUT IT WILL BE DIMINISHING AS A TROUGH MOVES EAST FROM THE CENTRAL PART OF THE COUNTRY. THIS TROUGH AND SFC FRONT WILL AFFECT OUR AREA TOWARDS THE MIDDLE OF NEXT WEEK. TEMPERATURES WILL BE NEAR NORMAL FOR FRIDAY AND INTO THE WEEKEND AS THE WARMEST AIR IS STILL BUILDING TO THE SOUTH OF THE AREA...HIGHS WILL MOSTLY BE IN THE LOW/MID 80S THESE THREE DAYS...COOLER NEAR THE SHORE. LOWS WILL MOSTLY BE IN THE 60S WITH SOME MID 50S UP ACROSS THE FAR NORTH. TEMPERATURES NEXT WEEK WILL RISE TO ABOVE NORMAL AS THE RIDGE STALLS ACROSS THE AREA. HIGHS WILL REACH MORE INTO THE UPPER 80S AND LOW 90S AT TIMES MON THRU WED. IT APPEARS THAT THE HUMIDITY LEVELS WILL ALSO PRODUCE UNCOMFORTABLE CONDITIONS DURING THE PERIOD. PRECIPITATION CHANCES DURING THE EXTENDED PERIOD ARE TYPICAL SUMMER-TIME TRENDS. THERE IS NO SINGLE SYSTEM...EXCEPT THE APPROACHING FRONT AT THE END OF THE PERIOD...WHICH WILL OFFER WIDESPREAD HIGHER POPS. DAYTIME SHOWERS/TSTMS WILL BE ACROSS THE WESTERN/NORTHERN AREAS FRI THRU SUN...AND MOST AREAS HAVE SLGT CHC OR CHC POPS MON THRU WED. && .AVIATION /23Z WEDNESDAY THROUGH MONDAY/... THE FOLLOWING DISCUSSION IS FOR KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY AND SURROUNDING AREAS. THE 00Z TAFS BRINGS THE LINE OF SHOWERS AND THUNDERSTORMS THROUGH ALL OF THE AIRPORTS/TERMINALS FROM THE KPHL METRO AREA NORTH AND NORTHWEST THIS EVENING. THE CHANCES FOR IFR CONDITIONS ARE HIGHEST AT KABE AND KRDG DURING THE THUNDERSTORMS. KACY AND KMIV SHOULD REMAIN VFR THIS EVENING WITH NO PRECIPITATION YET. WINDS SHOULD BE SOUTH AT AROUND 10 KTS, ADDITIONAL TSTM GUSTINESS JUST CARRIED AT KABE AND KRDG. OVERNIGHT SOME RESIDUAL SHOWERS COULD AFFECT ALL OF THE TERMINALS EARLY. THEN THE REGION WILL BE CLOSE TO THE FRONTAL ZONE WITH PRIMARILY MVFR CIGS AND VSBYS AND LIGHT WINDS. CONFIDENCE ABOUT THOSE CONDITIONS ARE LESS THAN AVERAGE AND MAY VERY WELL BE CHANGED BASED ON THE AMOUNT OF RAIN THAT FALLS OR DOESNT FALL THIS EVENING. THEN VFR CONDITIONS ARE FORECAST TO RETURN DURING THE MIDDLE OF THURSDAY MORNING. THERE COULD BE ISOLATED SHOWERS AND TSTMS DURING THE DAY, BUT CONFIDENCE AND AREAL COVERAGE ARE TOO LOW TO INCLUDE WITH THIS TAF PACKAGE. NORTHWEST WINDS WILL AVERAGE AROUND 10 KNOTS. INITIAL THOUGHT IS THAT THE SEA BREEZE FRONT WILL FORM DURING THE AFTERNOON BUT REMAIN JUST EAST OF KACY AND HOVER OVER EASTERN PORTIONS OF ALL OF OUR COUNTIES ADJACENT TO THE ATLANTIC OCEAN. OUTLOOK... THU NIGHT THRU MONDAY...MOSTLY VFR. SCT AFTERNOON SHOWERS/TSTMS MAY OCNL LOWER CIGS/VSBYS. && .MARINE... A WEAK FRONTAL BOUNDARY FROM THE NORTHWEST IS FORECAST TO ARRIVE EARLY ON THURSDAY. A SOUTH TO SOUTHWEST FLOW INTO TONIGHT IS EXPECTED TO BECOME WEST TO NORTHWEST FOR THURSDAY. WIND SPEEDS AND WAVE HEIGHTS ARE ANTICIPATED TO REMAIN BELOW THE SMALL CRAFT ADVISORY CRITERIA FOR TONIGHT AND THURSDAY. OUTLOOK... MOSTLY SUB-SCA CONDITIONS ARE EXPECTED ACROSS THE WATERS FRIDAY AND THROUGH THE WEEKEND. SCATTERED TSTMS WILL OCCASIONALLY CREATE HIGHER WINDS AND SEAS AT TIMES. && .PHI WATCHES/WARNINGS/ADVISORIES... PA...NONE. NJ...NONE. DE...NONE. MD...NONE. MARINE...NONE. && SYNOPSIS...O'HARA NEAR TERM...GIGI/IOVINO SHORT TERM...IOVINO LONG TERM...O'HARA AVIATION...GIGI/O'HARA MARINE...IOVINO/O'HARA
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 338 PM EDT WED JUN 25 2014 NJZ001-007>010-PAZ054-055-060>062-101-103-105-261945- SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-CARBON-MONROE-BERKS-LEHIGH- NORTHAMPTON-WESTERN CHESTER-WESTERN MONTGOMERY-UPPER BUCKS- 338 PM EDT WED JUN 25 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW JERSEY...NORTHWEST NEW JERSEY...EAST CENTRAL PENNSYLVANIA...NORTHEAST PENNSYLVANIA AND SOUTHEAST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. SHOWERS AND THUNDERSTORMS ARE EXPECTED THROUGH TONIGHT. THESE HAVE THE POTENTIAL TO PRODUCE LOCALLY VERY HEAVY RAINS WHICH MAY RESULT IN SOME LOCALIZED URBAN OR POOR DRAINAGE FLOODING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. DEZ001>004-MDZ008-012-015-019-020-NJZ012-013-015>023-027-PAZ070-071- 102-104-106-261945- NEW CASTLE-KENT-INLAND SUSSEX-DELAWARE BEACHES-CECIL-KENT MD- QUEEN ANNES-TALBOT-CAROLINE-MIDDLESEX-WESTERN MONMOUTH-MERCER-SALEM- GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND-ATLANTIC- CAPE MAY-SOUTHEASTERN BURLINGTON-DELAWARE-PHILADELPHIA- EASTERN CHESTER-EASTERN MONTGOMERY-LOWER BUCKS- 338 PM EDT WED JUN 25 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL DELAWARE...NORTHERN DELAWARE...SOUTHERN DELAWARE...NORTHEAST MARYLAND...CENTRAL NEW JERSEY...NORTHERN NEW JERSEY...SOUTHERN NEW JERSEY AND SOUTHEAST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. SHOWERS AND THUNDERSTORMS ARE EXPECTED THROUGH TONIGHT. THESE HAVE THE POTENTIAL TO PRODUCE LOCALLY VERY HEAVY RAINS WHICH MAY RESULT IN SOME LOCALIZED URBAN OR POOR DRAINAGE FLOODING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. NJZ014-024>026-261945- EASTERN MONMOUTH-ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC- COASTAL OCEAN- 338 PM EDT WED JUN 25 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW JERSEY AND SOUTHERN NEW JERSEY. .DAY ONE...THIS AFTERNOON AND TONIGHT. SHOWERS AND THUNDERSTORMS ARE EXPECTED THROUGH TONIGHT. THESE HAVE THE POTENTIAL TO PRODUCE LOCALLY VERY HEAVY RAINS WHICH MAY RESULT IN SOME LOCALIZED URBAN OR POOR DRAINAGE FLOODING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ430-431-450>455-261945- DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- COASTAL WATERS FROM SANDY HOOK TO MANASQUAN INLET NJ OUT 20 NM- COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20 NM- COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20 NM- COASTAL WATERS FROM GREAT EGG INLET TO CAPE MAY NJ OUT 20 NM- COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM- COASTAL WATERS FROM CAPE HENLOPEN TO FENWICK ISLAND DE OUT 20 NM- 338 PM EDT WED JUN 25 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS AND DELAWARE BAY WATERS. .DAY ONE...THIS AFTERNOON AND TONIGHT. SOME THUNDERSTORMS LATER TODAY COULD PRODUCE LOCALLY GUSTY WINDS AND FREQUENT CLOUD TO SURFACE LIGHTNING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
634 PM EDT WED JUN 25 2014
PAZ054-055-252330-
CARBON PA-MONROE PA-
634 PM EDT WED JUN 25 2014
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHERN CARBON AND
NORTHWESTERN MONROE COUNTIES...
AT 629 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM
DORRANCE TO CONYNGHAM TO RINGTOWN...MOVING NORTHEAST AT 30 MPH.
THESE STORMS WILL BE NEAR TRESCKOW AROUND 700 PM...BEAVER MEADOWS
AROUND 710 PM...WEATHERLY AROUND 720 PM AND BLAKESLEE AROUND 730 PM.
OCCASIONAL CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 40 MPH CAN BE
EXPECTED WITH THESE STORMS.
VERY HEAVY RAIN FROM THESE STORMS WILL CAUSE WATER TO POND ON ROADS
AND FILL POOR DRAINAGE AREAS. THE RAIN CAN ALSO CAUSE RAPID RISES ON
SMALL STREAMS AND CREEKS.
LAT...LON 4102 7541 4084 7592 4091 7600 4100 7575
4102 7574 4105 7578 4110 7576 4111 7573
4114 7569 4113 7564 4123 7554 4124 7549
JRKSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
717 PM EDT WED JUN 25 2014
PAZ054-061-062-260015-
CARBON PA-LEHIGH PA-NORTHAMPTON PA-
717 PM EDT WED JUN 25 2014
...A STRONG THUNDERSTORM WILL AFFECT CARBON...NORTHWESTERN LEHIGH AND
WEST CENTRAL NORTHAMPTON COUNTIES...
AT 717 PM EDT...A STRONG THUNDERSTORM WAS NEAR MIDDLEPORT...MOVING
EAST AT 30 MPH.
WIND GUSTS TO 50 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.
FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. DO
NOT STAY IN THE OPEN NOR SEEK SHELTER UNDER TREES WHEN LIGHTNING
THREATENS...MOVE INDOORS WHEN A THUNDERSTORM APPROACHES.
VERY HEAVY RAIN WILL CAUSE WATER TO POND ON ROADS AND FILL POOR
DRAINAGE AREAS. THE RAIN CAN CAUSE RAPID RISES ON SMALL STREAMS AND
CREEKS.
STORM INTENSITY IS INCREASING AND SEVERE THUNDERSTORM WARNINGS MAY
BE NEEDED.
THIS STORM WILL BE NEAR NEW MAHONING AROUND 740 PM...WEISSPORT AROUND
750 PM...PARRYVILLE AROUND 800 PM AND TRACHSVILLE AROUND 810 PM.
LAT...LON 4102 7559 4096 7556 4095 7557 4091 7554
4073 7545 4066 7587 4068 7589 4069 7588
4071 7581 4074 7577 4084 7592 4090 7598
JRKSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
724 PM EDT WED JUN 25 2014
PAZ060-061-260015-
BERKS PA-LEHIGH PA-
724 PM EDT WED JUN 25 2014
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CENTRAL LEHIGH AND
NORTHERN BERKS COUNTIES...
AT 722 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM DEER
LAKE TO FREDERICKSBURG...MOVING EAST AT 20 MPH.
WIND GUSTS TO 50 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS.
FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING. DO NOT STAY IN THE
OPEN NOR SEEK SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE
INDOORS WHEN A THUNDERSTORM APPROACHES.
VERY HEAVY RAIN WILL CAUSE WATER TO POND ON ROADS AND FILL POOR
DRAINAGE AREAS. THE RAIN CAN CAUSE RAPID RISES ON SMALL STREAMS AND
CREEKS.
THESE STORMS WILL BE NEAR WANAMAKERS AROUND 750 PM...NEW TRIPOLI
AROUND 800 PM...BERNVILLE AROUND 810 PM...SCHNECKSVILLE AROUND 820 PM
AND LENHARTSVILLE AROUND 830 PM.
LAT...LON 4050 7643 4052 7637 4052 7625 4059 7605
4058 7603 4065 7599 4068 7589 4072 7552
4069 7550 4053 7573 4038 7626 4049 7644
JRKSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
736 PM EDT WED JUN 25 2014
PAZ055-260030-
MONROE PA-
736 PM EDT WED JUN 25 2014
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT MONROE AND NORTHEASTERN
CARBON COUNTIES...
AT 733 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM
ARROWHEAD LAKE TO MECKESVILLE TO PENN FOREST RESERVOIR...MOVING EAST
AT 20 MPH.
WIND GUSTS TO 50 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS.
FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING. DO NOT STAY IN THE
OPEN NOR SEEK SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE
INDOORS WHEN A THUNDERSTORM APPROACHES.
VERY HEAVY RAIN WILL CAUSE WATER TO POND ON ROADS AND FILL POOR
DRAINAGE AREAS. THE RAIN CAN CAUSE RAPID RISES ON SMALL STREAMS AND
CREEKS.
THESE STORMS WILL BE NEAR POCONO RACEWAY AROUND 740 PM...GOULSBORO
STATE PARK AROUND 750 PM...BRODHEADSVILLE AROUND 800 PM...
TANNERSVILLE AROUND 810 PM...CANADENSIS AROUND 820 PM AND DELAWARE
WATER GAP AROUND 830 PM.
LAT...LON 4125 7512 4116 7515 4114 7507 4108 7502
4103 7505 4100 7512 4097 7514 4097 7512
4093 7521 4087 7528 4085 7549 4095 7557
4099 7550 4113 7565 4123 7554
JRKThe Philadelphia radar (KDIX), 137 km away, was scanning. The volume nearest the first event began at 00:09 UTC.
4 thunderstorm wind, 1 hail. Local standard time, as filed.
A severe thunderstorm knocked down a few trees in eastern Lynn Township.
A severe thunderstorm knocked down a few trees and wires in Heidelberg Township.
A severe thunderstorm knocked down a couple of trees in Lowhill Township.
A severe thunderstorm knocked down a couple of trees in North Whitehall Township.
A severe thunderstorm dropped quarter size hail in Orefield (Along the North and South Whitehall Township line).
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2014Every state in 2014This day in weather historyWarnings in Pennsylvania, June 2014
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 525677, 525678, 525679, 525680, 525676.