A nearly stationary frontal boundary focused slow moving thunderstorms with heavy rain in southwestern New Jersey during the late afternoon and early evening of the 10th. This caused poor drainage flash flooding as well as flash flooding of some smaller creeks.
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The episode as NWS PHI wrote it up.
A nearly stationary frontal boundary focused slow moving thunderstorms with heavy rain in southwestern New Jersey during the late afternoon and early evening of the 10th. This caused poor drainage flash flooding as well as flash flooding of some smaller creeks. Doppler Radar storm total estimates reached 2 to 4 inches in sections of Salem and Gloucester Counties and nearly 2 inches in Camden County.
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 10, 2:38 PM EST, 42 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 338 PM EDT TUE JUN 10 2014 .SYNOPSIS... A WEAK FRONTAL BOUNDARY IS FORECAST TO REMAIN NEAR OUR REGION THROUGH WEDNESDAY NIGHT BEFORE GRADUALLY LIFTING NORTH OF THE AREA AS A WARM FRONT DURING THURSDAY. A COLD FRONT IS THEN EXPECTED TO CROSS THE MID ATLANTIC STATES FRIDAY NIGHT AS ITS ASSOCIATED LOW PRESSURE LIFTS NORTH FROM THE GREAT LAKES INTO CANADA. OVER THE WEEKEND, HIGH PRESSURE WILL BUILD ACROSS THE REGION BEFORE MOVING OFFSHORE ON MONDAY. && .NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/... HIGH DEWPOINT AIR CONTINUES OVER THE REGION OVERNIGHT. ONGOING CONVECTION AT THE START OF THIS TIME PERIOD IS GENERATING LOCALLY HEAVY RAINFALL RATES AND LOCALIZED FLASH FLOODING WILL BE A POSSIBILITY INTO THE EARLY EVENING. CONVECTION WILL EBB AS THE EVENING PROGRESSES BUT SLIGHT CHANCE POPS WERE CONTINUED AFTER MIDNIGHT FOR WIDELY SCATTERED SHOWER POTENTIAL. PATCHY FOG WAS ALREADY IN THE GRIDS FOR LATER TONIGHT AND WAS RETAINED. TEMPERATURES ARE A MET/MAV BLEND OVERNIGHT. && .SHORT TERM /6 AM WEDNESDAY MORNING THROUGH 6 PM WEDNESDAY/... BACKDOOR COLD FRONT WITH HIGH PRESSURE TO OUR NORTHEAST IS STILL EXPECTED AND HIGH TEMPERATURES FOR THE CENTRAL AND EASTERN PARTS OF THE AREA ARE LOWER VS. TUESDAY TEMPERATURES DUE TO THE ONSHORE FLOW. PATCHY FOG IS EXPECTED INTO THE MID-MORNING HOURS. POPS INCREASE AS WE MOVE INTO THE AFTERNOON HOURS, WITH HIGHEST VALUES TO THE WEST, AS IMPULSE RIDING OVER FRONTAL BOUNDARY BRINGS INCREASED RISK OF PRECIPITATION. HIGHER QPF EXPECTED TOWARD THE WESTERN PART OF THE AREA. TEMPERATURES ARE A MET/MAV BLEND ON WEDNESDAY. && .LONG TERM /WEDNESDAY NIGHT THROUGH TUESDAY/... AN UNSETTLED WEATHER PATTERN IS EXPECTED TO CONTINUE THROUGH THE FIRST PART OF THE LONG TERM PERIOD. INTO WEDNESDAY NIGHT, A WEAK FRONTAL BOUNDARY THAT HAS LINGERED ACROSS THE REGION IS FORECAST TO HAVE PUSHED TO OUR SOUTH AS A BACKDOOR TYPE COLD FRONT, WITH AN AREA OF HIGH PRESSURE CENTERED WELL TO OUR NORTH ACROSS NORTHERN NEW ENGLAND AND THE CANADIAN MARITIMES. WITH THIS BOUNDARY REMAINING JUST SOUTH OF THE REGION AND A CONTINUED MUGGY AIRMASS IN PLACE, WE HAVE KEPT MOSTLY CHANCE POPS ACROSS THE FORECAST AREA AS SOME LINGERING SCATTERED SHOWERS AND/OR ISOLATED TSTORMS ARE POSSIBLE. POPS INCREASE THEN INTO THE LIKELY RANGE FOR MOST OF THE CWA THURSDAY AS THE PREVIOUSLY MENTIONED FRONTAL BOUNDARY LIFTS BACK NORTHWARD AS A WARM FRONT. THERE ARE SOME MODEL DIFFERENCES AS TO HOW FAST THIS WARM FRONT LIFTS NORTH DURING THURSDAY, BUT IT WILL PROVIDE ADDITIONAL FORCING TO TRIGGER MORE SCATTERED SHOWER/TSTORM ACTIVITY. WHILE INSTABILITY STILL LOOKS MARGINAL, PWATS WILL CONTINUE TO BE MOSTLY IN THE 1.5 TO 1.8 INCH RANGE, MAKING HEAVY RAIN THE MAIN CONCERN WITH ANY CONVECTION. WITH THE WARM FRONT NORTH OF OUR REGION INTO FRIDAY AND A COLD FRONT APPROACHING FROM THE WEST DURING THE DAY, MORE CONVECTIVE ACTIVITY IS EXPECTED. HIGH LIKELY POPS ARE IN PLACE AS A LEE-SIDE TROUGH SHOULD DEVELOP INTO THE AFTERNOON, HELPING TO ACT A TRIGGER. IN ADDITION, THERE LOOKS TO BE BETTER INSTABILITY AND SHEAR FRIDAY TO SUPPORT SOME STRONGER TO POSSIBLY SEVERE STORMS, WITH THE HEAVY RAIN THREAT ALSO CONTINUING. IMPROVING CONDITIONS LOOK TO BE IN STORE GOING INTO THE WEEKEND. WHILE THERE ARE SOME MODEL DIFFERENCES BETWEEN THE GFS, ECMWF, AND OTHERS REGARDING THE TIMING OF THE EXITING COLD FRONT EARLY SATURDAY, THE GENERAL TREND IS FOR CLEARING AS AN AREA OF HIGH PRESSURE TO OUR WEST BEGINS TO BUILD INTO THE MID ATLANTIC. WE HAVE KEPT SOME SLIGHT CHANCE POPS FOR ISOLATED SHOWERS/TSTORMS ACROSS OUR EASTERN ZONES EARLY SATURDAY, BUT OTHERWISE THE MAJORITY OF THE DAY LOOKS TO BE PRECIP-FREE WITH SOME SUNSHINE AS A DRIER, MORE COMFORTABLE AIRMASS BUILDS INTO THE REGION, WITH DEWPOINTS FORECAST TO DROP BACK INTO THE 50S FOR MUCH OF THE AREA. SUNDAY ALSO LOOKS TO BE A PLEASANT MID-JUNE DAY WITH HIGH PRESSURE STRETCHING ACROSS THE REGION ALLOWING FOR AMPLE SUNSHINE AND RELATIVELY COMFORTABLE HUMIDITY LEVELS. GOING INTO EARLY NEXT WEEK, HIGH PRESSURE IS FORECAST TO MOVE OFFSHORE MONDAY, WITH THE NEXT SYSTEM APPROACHING OUR REGION FROM THE MIDWEST GOING INTO TUESDAY. WITH UNCERTAINTY AND MODEL DIFFERENCES INCREASING AT THIS EXTENDED TIMEFRAME, WE MOSTLY WENT WITH A CONTINUITY/WPC GUIDANCE BLEND AND KEPT MONDAY MAINLY DRY, WITH SOMEWHAT INCREASING PRECIP CHANCES INTO SLIGHT CHANCE FOR MONDAY NIGHT INTO TUESDAY AS THERE MAY BE SOME SHORTWAVE ENERGY ALOFT TO AID IN SOME SCATTERED SHOWER/TSTORM DEVELOPMENT. && .AVIATION /20Z TUESDAY THROUGH SUNDAY/... THE FOLLOWING DISCUSSION IS FOR KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY AND SURROUNDING AREAS. TONIGHT...WIDELY SCATTERED CONVECTION MAY AFFECT SOME OF THE TAF SITES THRU 23Z. OTHERWISE, VFR CONDITIONS EARLY THIS EVENING TREND DOWN TO IFR AT ALL LOCATIONS DURING THE EVENING/EARLY MORNING HOURS AS FOG REDEVELOPS OVER THE REGION WITH REDUCTIONS IN CEILING AND VISIBILITY. LIFR CONDITIONS ARE POSSIBLE AFTER 06Z. LIGHT EASTERLY WINDS BECOME LIGHT AND VARIABLE OVERNIGHT. WEDNESDAY...IFR CONDITIONS AT THE START OF THE DAY IMPROVE TO MVFR AND THEN VFR AS FOG DIMINISHES IN THE MID MORNING HOURS. PREVAILING EAST TO NORTHEAST WIND AROUND 10 KNOTS DEVELOPS DURING THE MORNING AS BACKDOOR COLD FRONT PUSHES THROUGH THE REGION. SCATTERED SHOWERS ACTIVITY IS POSSIBLE BY MID TO LATE AFTERNOON AND MAY LOCALLY REDUCE CONDITIONS BELOW VFR. OUTLOOK... WEDNESDAY NIGHT THROUGH FRIDAY...SCATTERED SHWR/TSTORM ACTIVITY AT TIMES COULD PRODUCE MVFR OR LOWER CONDITIONS, AND THERE MAY ALSO BE SOME LOWER CLOUDS/FOG LATE-NIGHT TO EARLY MORNING IN THIS TIMEFRAME CREATING MVFR OR LOWER CONDITIONS. THE MOST WIDESPREAD SHWR/TSTORM ACTIVITY IS EXPECTED FRIDAY WITH AN APPROACHING COLD FRONT. SATURDAY...POSSIBLE SUB-VFR EARLY IMPROVING TO VFR CONDITIONS. SUNDAY...VFR CONDITIONS. && .MARINE... SOME SCATTERED SHOWERS AND THUNDERSTORMS THIS EVENING. LIGHT AND VARIABLE WINDS OVERNIGHT WITH SOME PATCHY FOG REDUCING VISIBILITY DOWN TO 2 MILES AT TIMES. ENE FLOW DEVELOPS ON WEDNESDAY AS A BACKDOOR COLD FRONT PUSHES INLAND. WINDS AND SEAS REMAIN BELOW SMALL CRAFT ADVISORY CRITERIA THRU WEDNESDAY. OUTLOOK... WEDNESDAY NIGHT THROUGH FRIDAY...SUB-ADVISORY CONDITIONS ARE EXPECTED. SOME SCATTERED SHOWERS/TSTORMS WILL BE POSSIBLE, THOUGH, EACH DAY, WITH LOCALLY REDUCED VISIBILITIES IN ANY ACTIVITY. SATURDAY AND SUNDAY...CONTINUED SUB-ADVISORY CONDITIONS AS HIGH PRESSURE BUILDS ACROSS THE REGION AND AREA WATERS. && .PHI WATCHES/WARNINGS/ADVISORIES... PA...NONE. NJ...NONE. DE...NONE. MD...NONE. MARINE...NONE. && SYNOPSIS...KLINE NEAR TERM...SZATKOWSKI SHORT TERM...SZATKOWSKI LONG TERM...KLINE AVIATION...SZATKOWSKI/KLINE MARINE...SZATKOWSKI/KLINE
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 357 PM EDT TUE JUN 10 2014 DEZ001>004-MDZ008-012-015-019-020-NJZ001-007>010-012>027-PAZ054-055- 060>062-070-071-101>106-112000- NEW CASTLE-KENT-INLAND SUSSEX-DELAWARE BEACHES-CECIL-KENT MD- QUEEN ANNES-TALBOT-CAROLINE-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET- MIDDLESEX-WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-SALEM-GLOUCESTER- CAMDEN-NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY- ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC-COASTAL OCEAN- SOUTHEASTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON- DELAWARE-PHILADELPHIA-WESTERN CHESTER-EASTERN CHESTER- WESTERN MONTGOMERY-EASTERN MONTGOMERY-UPPER BUCKS-LOWER BUCKS- 357 PM EDT TUE JUN 10 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL DELAWARE...NORTHERN DELAWARE...SOUTHERN DELAWARE...NORTHEAST MARYLAND...CENTRAL NEW JERSEY...NORTHERN NEW JERSEY...NORTHWEST NEW JERSEY...SOUTHERN NEW JERSEY...EAST CENTRAL PENNSYLVANIA...NORTHEAST PENNSYLVANIA AND SOUTHEAST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. SCATTERED SHOWERS AND THUNDERSTORMS WITH HEAVY DOWNPOURS WILL CONTINUE THROUGH LATE DAY AND TONIGHT, WITH LOCALIZED FLOODING POSSIBLE. DURING THE OVERNIGHT, PATCHY FOG IS EXPECTED ACROSS THE AREA AND MAY BECOME LOCALLY DENSE IN LOCATIONS WHERE HEAVY RAIN FELL. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. PATCHY FOG IS POSSIBLE ACROSS THE AREA INTO MID WEDNESDAY MORNING. THE REST OF THIS WORK WEEK WILL CONTINUE TO FEATURE A HUMID AIRMASS WHICH WILL RAISE THE CHANCES FOR HEAVY DOWNPOURS WITH ANY SHOWERS OR THUNDERSTORMS. CHANCES WILL INCREASE FOR STRONGER THUNDERSTORMS AS THE WORK WEEK CONCLUDES, LIKELY PEAKING ON FRIDAY AND FRIDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ430-431-450>455-112000- 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- 357 PM EDT TUE JUN 10 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS AND DELAWARE BAY WATERS. .DAY ONE...THIS AFTERNOON AND TONIGHT. PATCHY FOG IS POSSIBLE ACROSS THE AREA WATERS TONIGHT AND INTO WEDNESDAY MORNING. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. SOME PATCHY FOG COULD OCCUR INTO FRIDAY WITH THE THREAT FOR STRONGER THUNDERSTORMS ON FRIDAY AND FRIDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
415 PM EDT TUE JUN 10 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0345 PM FLASH FLOOD 1 W WILMINGTON AIRPORT 39.68N 75.63W
06/10/2014 NEW CASTLE DE DEPT OF HIGHWAYS
FLOODING AT 1-95 AND CHURCHMANS ROAD. 1.60 INCHES OF
RAIN IN LESS THAN AN HOUR.
&&
EVENT NUMBER PHI1400286
STAFFThe Philadelphia radar (KDIX), 85 km away, was scanning. The volume nearest the first event began at 20:20 UTC.
6 flash flood, 1 flood. Local standard time, as filed.
Thunderstorms with heavy rain caused flash flooding of smaller creeks and roadways in Pilesgrove Township just to the northwest of Woodstown. Doppler Radar storm total estimates reached between 3.0 and 3.5 inches.
Heavy rain caused flash flooding in and around Glassboro. The flooding also affected a shopping center where water accumulated around one foot.
Heavy rain caused flash flooding of smaller creeks and roadways in and around Pitman. Event precipitation totals included 4.11 inches within the borough.
Heavy rain caused flash flooding of the Scotland Run and the closure of U.S. Route 322 at Fries Mill Road in Williamstown (Monroe Township). Event precipitation totals 2.69 in the township, most of which fell within an hour.
Heavy rain caused flash flooding along and around U.S. Route 130 in Pennsauken Township. Lanes were closed on the major roadway.
Heavy rain caused flash flooding along the Mantua Creek near Pitman. The creek crested at 5.32 feet (flood stage is 5 feet). Event precipitation totals included 4.11 inches in Pitman.
The heavy rain caused flooding along the Mantua Creek near Pitman that continued into the middle of the evening on the 10th. The Mantua Creek near Pitman was above its 5 foot flood stage from 627 p.m. EDT through 854 p.m. EDT on the 10th. It crested at 5.32 feet at 730 p.m. EDT. Event precipitation totals in Gloucester County included 4.11 inches in Pitman, 2.69 in Monroe Township, 2.59 inches in Washington Township, 2.20 inches in Sewell and 2.04 inches in Sewell.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New Jersey in 2014Every state in 2014This day in weather historyWarnings in New Jersey, 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: 524814, 524805, 524806, 524802, 524808, 524807, 524816.