An upper air disturbance helped cause a few severe thunderstorms across northern New Jersey.
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.
An upper air disturbance helped cause a few severe thunderstorms across northern New Jersey.
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 21, 3:15 PM EST, 1 hour 20 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 415 PM EDT THU JUN 21 2007 .SYNOPSIS... A WEAK COLD FRONT ATTENDED BY AN UPPER LEVEL DISTURBANCE ON A STRONG NORTHWEST FLOW WILL MOVE THROUGH THE AREA EARLY TONIGHT. A NORTHWEST FLOW SURFACE AND ALOFT FRIDAY WILL PRECEDE HIGH PRESSURE BUILDING OVER THE REGION SATURDAY. A DRY FRONT MAY MOVE THROUGH NORTHERN AREAS SUNDAY, OTHERWISE HIGH PRESSURE WILL INFLUENCE OUR WEATHER THROUGH EARLY NEXT WEEK. A HOTTER AIRMASS WILL BUILD INTO THE AREA FROM THE SOUTHWEST FOR THE MIDDLE OF NEXT WEEK, AND TEMPERATURES AND HUMIDITIES ARE EXPECTED TO WARM SIGNIFICANTLY BY NEXT THURSDAY. && .NEAR TERM /UNTIL 6 AM FRIDAY MORNING/... THE UPPER LEVEL NORTHWEST WINDS WERE SOMEWHAT STRONGER OVER OUR NORTHERN AREAS AS OPPOSED TO SOUTH COMBINED WITH SLIGHTLY COLDER AIR ALOFT, AND WITH TERRAIN INFLUENCES, THE SEVERE THUNDERSTORM WATCH PLACEMENT LOOKS GOOD. CAPES WERE FAIRLY HIGH OVER THE NORTHERN AREAS, TOO, AT LEAST ON THE NAM. HOWEVER AS NOTED BY THE DAY 1 SEVERE WEATHER OUTLOOK, EVEN OUR SOUTHERN AREAS COULD PICK UP A STRONG THUNDERSTORM OR TWO. THE TRAIN OF SHOWERS AND THUNDERSTORMS OVER SOUTH-CENTRAL PENNSYLVANIA EXTENDING WEST- NORTHWESTWARD INTO OHIO COULD MOVE INTO THE LOWER DELAWARE VALLEY/NORTHERN DELMARVA AREA IF IT HOLDS TOGETHER. IT IS THOUGHT THAT ALL OF THIS ACTIVITY WILL DIMINISH FAIRLY RAPIDLY THIS EVENING AS THE LIFT AND CAPE DRIBBLE AWAY AND DIURNAL EFFECTS DISAPPEAR. SKY COVER SHOULD DIMINISH WITH SKIES BECOMING MOSTLY CLEAR FOR MANY SECTIONS BY LATE EVENING OR SHORTLY AFTER MIDNIGHT. && .SHORT TERM /6 AM FRIDAY MORNING THROUGH SATURDAY/... ANOTHER SURFACE TROUGH IS INDICATED LATE FRIDAY, BUT IT MAY BE TOO FAR EAST TO AFFECT US IN THE NORTHWEST FLOW ALOFT, AS THE LONG WAVE TROUGH SHIFTS SLIGHTLY EASTWARD. NO UPWARD VERTICAL MOTIONS OF CONSEQUENCE ARE PORTRAYED BY THE MODELS, SO THE DRY WEATHER IS CONTINUED FOR NOW FOR FRIDAY. STATISTICAL GUIDANCE IS VERY LOW AS WELL. MORE COMFORTABLE TEMPERATURES AND ESPECIALLY HUMIDITIES WILL OCCUR FRIDAY NIGHT. && .LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/... THE MODELS HAVE BEEN HINTING FOR VARIOUS DAYS OF WEAK FRONTS OR TROUGHS, AND TODAY IS NO EXCEPTION IN SHOWING A TROUGH FOR SUNDAY. SINCE WE HAD IT DRY, AND HPC HAD NO PRECIPITATION EITHER, IT WAS DECIDED TO LEAVE PRECIPITATION OUT OF THE FORECAST FOR NOW, WITH NOT EVEN AN INVISIBLE 20 PERCENT PROBABILITY. OTHERWISE, HIGH PRESSURE MONDAY WILL SLIDE SOUTHEAST AND OFFSHORE TUESDAY. AS THE UPPER HIGH CLOSES OFF AND DOMINATES, THE RETURN FLOW IS LIKELY TO BE A HOT AND HUMID ONE. TEMPERATURES WERE INCREASED INTO THE LOWER 90S BY THURSDAY FOR NOW, ALTHOUGH MID 90S MAY NOT BE OUT OF THE QUESTION. STAY TUNED FOR POSSIBLY THE FIRST REAL HEAT WAVE OF THE SEASON. BEFORE THE HEAT, QUITE COOL CONDITIONS, ESPECIALLY FOR OUR NORTHERN ZONES, WILL BE OCCURRING SATURDAY NIGHT. THE COOLEST PART OF THE AIRMASS WILL MOVE OUT AND MODIFY UPWARD BY SUNDAY NIGHT. && .AVIATION /20Z THURSDAY THROUGH TUESDAY/... OUTSIDE OF MAYBE AN HOUR OR SO LATER THIS AFTN/ERLY THIS EVE...VFR CONDS EXPECTED THRUT THE TAF FCST PERIOD. SO FAR SO GOOD WITH CONVECTION UPSTREAM FROM THE TERMINAL LOCATIONS. SFC WINDS WHICH WERE MORE CONDUCIVE ERLR TDY HAVE AT LEAST DURG THE ERLY AFTN VEERED TO THE NW IN CNTRL PA AND REDUCED THE INFLOW TO THE TSRA KEEPING THEM FAIRLY WDLY SCTD. LAST HOUR OR SO THE SFC WINDS ARE STARTING TO BACK AGAIN IN RESPONSE TO THE APCHG SHRT WV. TAKING A STRAIGHT LINE ONGOING UPSTREAM CONVECTION WOULD NOT AFFECT OUR TERMINALS DIRECTLY. BUT, SHORT WAVE STILL EXPECTED TO APCH LATER THIS AFTN AND PAST LOCNS IS NOT NECESSARILY AN INDICATION OF FUTURE DEVELOPMENTS ESP WITH THE SFC WINDS BACKING TO THE SW. SO WE HAVE INCLUDED THE MNTN OF CB(S) SE THRU THE PHL CWA. BASED ON THE SHORT WAVE FCST POSITIONING WE WOULD RANK THE TSRA THREAT AS ABE FIRST, RDG 2ND, TTN 3RD WITH LESS OF A CHC IN THE PHL METRO AREA AIRPORTS AND ESP THE SERN NJ TERMINALS. WRF-NMM BUFKIT DOES INCREASE THE WINDS LATER THIS AFTN AND WE SPLIT THE TERMINALS TO REFLECT THIS FROM PHL ON NORTH. WINDS DO LOOK A BIT HIGH BASED ON UPSTREAM OBS, SO WE DID NOT GO AS HIGH AS THE BUFKIT MOMENTUM TRANSFER. DAYTIME HEATING THE KEY TO THE CONVECTION, SO DO NOT EXPECT MUCH ACTIVITY AS THE EVE CONTINUES. ALSO THE REINFORCING SHOT OF DRIER AIR SHOULD PREVENT ANY FOG FROM FORMING TWD MRNG AT ANY OF THE TERMINALS UNLESS THEY GET A TSRA SQUARELY LATER TAFTN. TERMINAL AREA FCSTD TO BE CAPPED ON FRI. WHL CONVECTIVE TEMP EXPECTED TO BE REACHED, THEY SHOULD NOT HAVE THE CHC TO GO TOO VERTICAL. ALSO SINCE CONVECTIVE TEMPS BARELY ARE BEING MET, WE KEPT COVERAGE ON THE FEW-SCT SIDE. WINDS ABV THE SFC WILL AGAIN BE BRISK AND PEAK WIND GUSTS DURG THE AFTN SHOULD REACH BTWN 20-30KT AT THE TERMINAL LOCNS. PREVAILING W-NW DIRECTION SHOULD NOT CAUSE ANY DIFIFCULT RUNWAY DECISIONS. THE OUTLOOK FROM 18Z FRIDAY THROUGH WEDNESDAY, NO SIGNIFICANT WEATHER IS FORECAST ALTHOUGH THERE COULD BE SOME EARLY MORNING FOG AND HAZE EACH DAY. FIRST PRECIPITATION CHANCE NOT EXPECTED TIL WEDNESDAY WHICH MIGHT INCREASE THE CHCS FOR MVFR OR BRIEFLY IFR CONDS. && .MARINE... WE ARE NOT EXPECTING SCA CONDS TO BE MET THRUT THE FCST PERIOD. THERE ARE A COUPLE OF CAVEATS. THE FIRST IS LATE THIS AFTN AS THE GRAD IS FCST TO TIGHTEN. THERE IS A REPEAT OF SIM CONDS LATE FRI AFTN. IN BOTH INSTANCES THE STGST WINDS ARE EXPECTED TO OCCUR NEAR THE SHORE AND AROUND THE INLETS. CONFID IS NOT HIGH ENUF ATTM TO ISSUE A SCA AS THE STGST WINDS ARE EXPECTED TO OCR LATE FRI AFTN AND SO FAR MESONETS NEAR THE COAST HAVE HAD WIND GUSTS TO ABOUT 17 KTS. ON FRI COULD BE AN ISSUE OF WARMER AIR OR RELATIVELY WARMER AIR OVER THE COOLER WATER (AND SLIGHTLY COOLED LAND AREAS) THAT WILL HOLD BACK THE MIXING SOMEWHAT. AFTER THAT AS HIGHER PRESSURE NEARS, WINDS SHLD DECREASE ON SAT. WINDS AND SEAS MIGHT INCREASE AGAIN LATER SUNDAY AS THE NEXT TROF APCHS, BUT SCA CRIT IS NOT EXPECTED TO BE REACHED. TROF DISPTS AND A WEAKER GRAD EXPECTED FOR MON. ANOTHER TROF FCSTD TO APCH ON TUE, BUT AGAIN THIS IS ANOTHER WEAKENING SYS AND ANY INCREASE OF WINDS AND SEAS SHLD REMAIN BLO SCA CRIT. && .FIRE WEATHER... AFTER COORDINATING WITH NJ STATE FORESTRY THIS MORNING WE DECIDED TO HOLD OFF ON ISSUING A FIRE WEATHER WATCH. GUID CONTS TO GIVE US CRIT THAT IS JUST BELOW WRT TO THE WINDS AND JUST ABV WRT TO THE RH/S. THE PINE BARRENS DID RECEIVE ABT A QUARTER TO A HALF INCH OF RAIN FROM THE TSRAS THE OTHER NIGHT. WE STILL HAVE TO SEE IF WE GET ANY THAT FAR S WITH THIS NEXT BATCH OF CONVECTION THIS EVE. THE RANDOM ELEMENT IN ALL OF THIS IS THAT THE GYPSY MOTH DEFOLIATION IN PARTS OF OCEAN AND BURLINGTON COUNTIES IS QUITE EXTENSIVE. THE FOREST FLOOR IS GETTING MORE SUN THAN IT NORMALLY DOES THIS TIME OF YEAR. AS PER COORD WE WILL ISSUE AN AFTN FIRE WX FORECAST AND IN THE DISCUSSION TALK ABOUT CRIT APCHG RED FLAG CRIT. PLACES FARTHER TO THE S (DELMARVA) LOOK AS THO THE WIND CRIT WILL FALL A BIT MORE SHORTER. CONVERSELY PLACES FARTHER TO THE NORTH, HAVE HAD MORE PCPN RECENTLY AND MAY GET MORE THIS EVE. && .PHI WATCHES/WARNINGS/ADVISORIES... PA...NONE. NJ...NONE. DE...NONE. MD...NONE. MARINE...NONE. && SYNOPSIS/NEAR TERM/SHORT TERM/LONG TERM... AVIATION/MARINE/FIRE WEATHER...TFG
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 351 PM EDT THU JUN 21 2007 NJZ001-007-008-PAZ054-055-222000- SUSSEX-WARREN-MORRIS-CARBON-MONROE- 351 PM EDT THU JUN 21 2007 ...SEVERE THUNDERSTORM WATCH 435 IN EFFECT UNTIL 10 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW JERSEY AND NORTHEAST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. SEVERE THUNDERSTORM WATCH. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS LATER THIS AFTERNOON AND EARLY THIS EVENING. A WEAK FRONTAL BOUNDARY AND STRONG UPPER LEVEL DISTURBANCE WILL MOVE ACROSS THE REGION. DAYTIME HEATING AND STRONG ASCENT FROM THE UPPER LEVEL SYSTEM HAS TRIGGERED SOME SHOWERS AND THUNDERSTORMS UPSTREAM. WHILE THE OVERALL COVERAGE OF PRECIPITATION IS LOW, A FEW OF THE THUNDERSTORMS THAT WILL MOVE THROUGH COULD BECOME SEVERE. THE MOST LIKELY THREATS ARE DAMAGING WINDS AND HAIL. THE SEVERE THREAT WILL END WITH THE LOSS OF DAYTIME HEATING EARLY THIS EVENING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY UNSEASONABLY HOT WEATHER IS LIKELY TO BECOME ESTABLISHED BY THE MIDDLE OF NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SKY WARN SPOTTER ACTIVATION IS REQUESTED IN THE WATCH AREA. DEZ001-MDZ008-NJZ009-010-012>020-026-027-PAZ060>062-067>071-222000- NEW CASTLE-CECIL-HUNTERDON-SOMERSET-MIDDLESEX-WESTERN MONMOUTH- EASTERN MONMOUTH-MERCER-SALEM-GLOUCESTER-CAMDEN- NORTHWESTERN BURLINGTON-OCEAN-COASTAL OCEAN-SOUTHEASTERN BURLINGTON- BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE- PHILADELPHIA- 351 PM EDT THU JUN 21 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN DELAWARE...NORTHEAST MARYLAND...CENTRAL NEW JERSEY...NORTHERN NEW JERSEY...SOUTHERN NEW JERSEY...EAST CENTRAL PENNSYLVANIA AND SOUTHEAST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS LATER THIS AFTERNOON AND EARLY THIS EVENING. A WEAK FRONTAL BOUNDARY AND STRONG UPPER LEVEL DISTURBANCE WILL MOVE ACROSS THE REGION. DAYTIME HEATING AND STRONG ASCENT FROM THE UPPER LEVEL SYSTEM HAS TRIGGERED SOME SHOWERS AND THUNDERSTORMS UPSTREAM. WHILE THE OVERALL COVERAGE OF PRECIPITATION WILL BE LOW, AN ISOLATED THUNDERSTORM OR TWO COULD BECOME SEVERE. THE MOST LIKELY THREATS ARE STRONG GUSTY WINDS AND HAIL. THE CHANCES FOR A SEVERE THUNDERSTORM INCREASE THE FARTHER NORTH WITHIN THE PHILADELPHIA MOUNT HOLLY CWA ONE LIVES. THE SEVERE THREAT WILL END WITH THE LOSS OF DAYTIME HEATING EARLY THIS EVENING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY UNSEASONABLY HOT WEATHER IS LIKELY TO BECOME ESTABLISHED BY THE MIDDLE OF NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. ANZ430-431-450>455-222000- 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- 351 PM EDT THU JUN 21 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS AND DELAWARE BAY WATERS. .DAY ONE...THIS AFTERNOON AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. DEZ002>004-MDZ012-015-019-020-NJZ021>025-222000- KENT DE-INLAND SUSSEX-DELAWARE BEACHES-KENT MD-QUEEN ANNES-TALBOT- CAROLINE-CUMBERLAND-ATLANTIC-CAPE MAY-ATLANTIC COASTAL CAPE MAY- COASTAL ATLANTIC- 351 PM EDT THU JUN 21 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL DELAWARE...SOUTHERN DELAWARE...EASTERN MARYLAND...NORTHEAST MARYLAND AND SOUTHERN NEW JERSEY. .DAY ONE...THIS AFTERNOON AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. TFG/
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 339 PM EDT THU JUN 21 2007 NJZ001-007-PAZ054-055-062-212045- CARBON-MONROE-NORTHAMPTON-SUSSEX-WARREN- 339 PM EDT THU JUN 21 2007 ...THUNDERSTORMS WILL AFFECT CARBON...MONROE...NORTHAMPTON... SUSSEX AND WARREN COUNTIES... AT 330 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS 11 MILES NORTHWEST OF WILKES-BARRE...MOVING SOUTHEAST AT 50 MPH. THE THUNDERSTORMS WILL BE NEAR EAST SIDE...WHITE HAVEN AROUND 400 PM...BRODHEADSVILLE...POCONO PINES AROUND 415 PM... EAST BANGOR...ROSETO AROUND 430 PM...BELVIDERE AND OXFORD AROUND 445 PM. AT THIS TIME...IT APPEARS WIND GUSTS TO 40 MPH AND SMALL HAIL WILL BE POSSIBLE WITH THESE STORMS. KRUZDLO
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 435 PM EDT THU JUN 21 2007 NJZ001-007>010-PAZ054-055-060>062-068-069-212145- BERKS-BUCKS-CARBON-HUNTERDON-LEHIGH-MONROE-MONTGOMERY-MORRIS- NORTHAMPTON-SOMERSET-SUSSEX-WARREN- 435 PM EDT THU JUN 21 2007 ...STRONG THUNDERSTORMS WILL AFFECT BERKS...BUCKS...CARBON... HUNTERDON...LEHIGH...MONROE...MONTGOMERY...MORRIS...NORTHAMPTON... SOMERSET...SUSSEX AND WARREN COUNTIES... AT 430 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 41 MILES NORTHWEST OF PATERSON NEW JERSEY TO 30 MILES NORTHWEST OF READING PENNSYLVANIA...MOVING SOUTHEAST AT 45 MPH. THE THUNDERSTORMS WILL BE NEAR HAMBURG...SUSSEX AROUND 445 PM...HIGHLAND LAKE...TATAMY AROUND 500 PM...HOPATCONG...HACKETTSTOWN...EASTON...ALLENTOWN PENNSYLVANIA...AND KUTZTOWN AROUND 510 PM...WILSON...WEST EASTON AROUND 515 PM...FLORHAM PARK AND FAR HILLS AROUND 530 PM. WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE STORMS. EXPECT SMALL HAIL AND FREQUENT...DANGEROUS LIGHTNING FROM THESE STORMS. KRUZDLO
The national radar mosaic for the moment the first event began.
6 thunderstorm wind. Local standard time, as filed.
A severe thunderstorm tore down large tree linbs and wires in Franklin, Greenwich and Harmony Townships. The downed wires in Greenwich Township occurred along County Route 173.
A severe thunderstorm knocked down a couple of trees and wires in Milford Borough and Holland Township.
A severe thunderstorm knocked down a few large tree limbs and wires in Whitehouse Station (Readington Township).
A severe thunderstorm knocked down a few trees and wires in the Skillman section of Montgomery Township. A few one foot diameter trees were knocked down across County Route 601.
A severe thunderstorm knocked down a few trees and wires in Vernon Township.
A severe thunderstorm knocked down large tree limbs and wires in Hackettstown.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New Jersey in 2007Every state in 2007This day in weather historyWarnings in New Jersey, June 2007
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: 41924, 41930, 41932, 41929, 41922, 41927.