Flooding in New Jersey, April 30, 2014

Name: Flooding in New Jersey, April 30, 2014
Start: 2014-04-30T14:32
End: 2014-04-30T23:59
Location: New Jersey

April 30, 2014 · NWS PHI · 10 events in 10 counties and zones

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: $4.3 million
Crop damage: None recorded
Events: 10

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.

What happened

The episode as NWS PHI wrote it up.

A slow moving low pressure system and a deep southerly flow from the Gulf of Mexico and then the Atlantic Ocean dropped heavy rain across New Jersey centered on the 30th. Event precipitation totals averaged from 3 to 6 inches, with the highest amounts in central New Jersey. This caused widespread poor drainage flooding as well as flooding of creeks and rivers throughout most of the state. Major creek and river flooding occurred in the Raritan and Assunpink Basins with moderate river flooding occurring in parts of the Passaic Basin. Many roadways were flooded. New Jersey Transit cross honored tickets on the commuter rail lines and buses. One hundred forty-six major roadways and interstates were flooded and completely closed or had lane closures throughout the state of New Jersey. Many roadways were re-opened by the end of the day on May 1st and most were opened again on May 2nd. The steady rain started during the afternoon of the 29th and fell at a steady light to moderate clip through the night. But, on the 30th the rain fell heavy at times during the morning and afternoon in the southern third of the state, and from the late morning into the evening of the 30th elsewhere in the state. Rainfall amounts of 2 inches in six hours were common. The rain ended from the south to north from around Midnight EDT to around 6 a.m. EDT on May 1st. | |The heavy rain was caused by the combination of a strong high pressure system that built over the Canadian Maritimes that initiated the onshore flow and a strong, but slow moving low pressure system. The low pressure system was located in northwest Missouri on the morning of the 29th. It moved northeast to near Chicago during the afternoon of the 29th. The low pressure system then became nearly stationary in southern Wisconsin as its cold front reached Ohio early on the 30th. Then a new low pressure system developed on the frontal boundary and was over Eastern Tennessee on the morning of the 30th. The low pressure system reached West Virginia during the late afternoon on the 30th as its warm front started to move through Delmarva. The low pressure system reached north central Maryland at 11 p.m. EDT on the 30th as its warm front reached extreme southeast Pennsylvania and central New Jersey. The low pressure system reached the Allentown, Pennsylvania area at 5 a.m. EDT on May 1st and then was absorbed again into the frontal boundary associated with the original low as it moved into New York State that morning. The steady rain ended as the low pressure system passed north of New Jersey.

What forecasters said that day

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 Apr 30, 11:20 AM EST, 3 hours 12 minutes earlier.

Area forecast discussion, Apr 30, 11:20 AM EST, 3 hours 12 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1220 PM EDT WED APR 30 2014

.SYNOPSIS...
A LOW PRESSURE SYSTEM WILL MEANDER NEAR THE GREAT LAKES REGION TODAY
INTO THURSDAY. A WARM FRONT WILL THEREFORE GRADUALLY LIFT NORTHWARD
ACROSS THE MID ATLANTIC STATES TODAY AND TONIGHT. A COLD FRONT IS
THEN FORECAST TO SLIDE ACROSS OUR AREA THURSDAY. AN AREA OF HIGH
PRESSURE BUILDS TO OUR SOUTH FRIDAY AND SATURDAY, HOWEVER ANOTHER
COLD FRONT MOVES THROUGH OUR REGION SATURDAY NIGHT AND SUNDAY. HIGH
PRESSURE GRADUALLY BUILDS IN FOR MONDAY AND TUESDAY.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
WILL MAINTAIN THE PERSISTENCE FCST AS THE RADAR IS FILLED WITH
GENLY LIGHT TO MDT RAIN ECHOES ATTM. THERE HAVE BEEN A FEW
LIGHTNING STRIKES ACRS THE DELMARVA, BUT THEY HAVE NOT BEEN
WIDESPREAD OR PERSISTENT. WHILE THE CALENDAR IS ABOUT TO TURN TO
MAY, IT FEELS MORE LIKE EARLY MARCH, WITH JUST ANOTHER DREARY DAY
IN STORE. EXPECT PERIODS OF RAIN, PSBLY TO BECOME MORE SHOWERY
LATER TODAY.  A WARM FRONT WILL SLOWLY WORK ITS WAY N DURG THE DAY.

EVEN IN THE WARM SECTOR HOWEVER, EXPECT THE LOW LEVEL INVERSION TO
PERSIST. THEREFORE, ANY THUNDERSTORMS WILL HAVE TO RELY ON ELEVATED
INSTABILITY WITH PARCELS LIFTED FROM AROUND THE 900 TO 800 MB
LEVELS. EVEN WITH THAT, CAPE VALUES WILL BE MODEST AT
BEST...GENERALLY LESS THAN 200 J/KG. IF ANY STORMS DEVELOP HOWEVER,
THERE IS A SMALL CONCERN THAT WEAK DOWN DRAFTS COULD MIX THE 40KT+
WINDS FROM THE LOW LEVELS DOWN TO THE SURFACE, BUT THIS IS STILL
QUITE UNCERTAIN.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 AM THURSDAY/...
THROUGH THIS PERIOD, WE WILL SEE THE ARRIVAL OF THE DRY SLOT IN OUR
REGION. HOWEVER, GIVEN THE CONTINUED MOIST SOUTHERLY SURFACE FLOW,
STILL EXPECT AT LEAST LIGHT RAIN TO CONTINUE THROUGH THE OVERNIGHT
HOURS. MODEL SOUNDINGS ALSO CONTINUE TO SHOW SOME ELEVATED
INSTABILITY, PRIMARILY IN DELMARVA, THOUGH THE CHANCES FOR
THUNDERSTORMS SHOULD BE ON THE DECREASE AFTER MIDNIGHT AS THE AXIS
OF HIGHEST PWAT VALUES SLIDES OFF SHORE. WITH THE PERSISTENT LOW
LEVEL CLOUD COVER, AND SOUTHERLY FLOW, EXPECT TEMPERATURES TONIGHT
TO ONLY BE A FEW DEGREES BELOW THE HIGHS TODAY.

&&

.LONG TERM /THURSDAY THROUGH TUESDAY/...
THE OVERALL SYNOPTIC SETUP INITIALLY REVOLVES AROUND A LARGE CLOSED
LOW. THIS FEATURE IS FORECAST TO SLOWLY WEAKEN AS IT LIFTS ACROSS
THE GREAT LAKES REGION AND INTO CANADA THURSDAY AND FRIDAY. THIS
WILL DRIVE A COLD FRONT ACROSS OUR REGION, HOWEVER ENERGY HANGING
BACK LOOKS TO MAINTAIN AN UPPER-LEVEL TROUGH ACROSS THE PLAINS TO
THE GREAT LAKES WHICH THEN SHIFTS EASTWARD SATURDAY AND SUNDAY. THIS
MAY AMPLIFY ONCE AGAIN SUNDAY OR EARLY NEXT WEEK IN THE EAST AS
RIDGING BUILDS ACROSS THE CENTRAL AND NORTHERN PLAINS. THE MOST
ORGANIZED PRECIPITATION LOOKS TO BE FEATURED ON THURSDAY AS A COLD
FRONT SHIFTS EASTWARD. WE USED A GENERAL MODEL BLEND THURSDAY
THROUGH SATURDAY, THEN UTILIZED THE 00Z WPC GUIDANCE WITH CONTINUITY
OVERALL.

FOR THURSDAY...A COLD FRONT WILL BE MOVING ACROSS THE REGION. AS
THIS OCCURS, THE LOW-LEVEL JET IS FORECAST TO BE SHIFTING OFFSHORE
EARLY IN THE MORNING. WHILE THIS WILL TEND TO LESSEN THE FORCING AND
DEEPER MOISTURE ADVECTION, ENOUGH FORCING ALONG WITH SOME
INSTABILITY AHEAD OF THE FRONT SHOULD RESULT IN A BAND OF SHOWERS
AND SOME THUNDER. THE POPS WERE THEREFORE INCREASED FOR A TIME
BEFORE DECREASING QUITE A BIT FROM ABOUT MIDDAY ON. IT APPEARS
THAT FROM ABOUT INTERSTATE 95 ON EASTWARD HAS THE GREATEST CHC FOR
SHOWERS AND SOME THUNDER GIVEN THE EASTWARD SHIFTING DEEPER MOISTURE
AND FRONTAL ZONE TIMING. THE INSTABILITY SHOULD BE HELD DOWN DUE TO
ONGOING ACTIVITY TO START, HOWEVER A WARMER AND MOIST AIRMASS WILL
BE IN PLACE. AS OF NOW, ANY SEVERE THUNDERSTORM THREAT LOOKS TO BE
RATHER LOW. GIVEN THE ANTICIPATED RUNOFF AND SHOWERS HANGING ON,
THE FLOOD WATCH CONTINUES THROUGH THE MORNING. A LAG THOUGH IN
THE TRUE CAA POST-FRONTAL WILL ALLOW FOR A WARM DAY ACROSS THE
ENTIRE AREA. OTHERWISE, THE WINDS WILL SHIFT TO THE WEST-NORTHWEST
ESPECIALLY LATER IN THE DAY AS THE COLD FRONT WORKS ITS WAY
EASTWARD. THE CLOUDS WILL ALSO START TO ERODE, ESPECIALLY AT NIGHT
FROM WEST TO EAST AS DRYING ARRIVES.

FOR FRIDAY AND SATURDAY...OUR WEATHER WILL STILL BE INFLUENCED BY
THE WEAKENING UPPER-LEVEL LOW AS IT TRACKS UP ACROSS SOUTHEASTERN
CANADA. THERE IS ADDITIONAL SHORT WAVE ENERGY TRACKING NORTHEASTWARD
WITHIN THE SOUTHWESTERLY FLOW ALOFT, AND WITH STEEPER LAPSE RATES
AND ENOUGH MOISTURE AND HEATING SOME SHOWERS MAY RESULT ESPECIALLY
EACH AFTERNOON. IT APPEARS THE BEST CHC IS ACROSS THE NORTHWEST
ZONES, ALTHOUGH THIS MAY SPREAD FARTHER SOUTHEASTWARD SOMEWHAT
SATURDAY AS A COLD FRONT ARRIVES LATE IN THE DAY. THE OVERALL
MOISTURE AND FORCING WITH THIS COLD FRONT LOOKS TO BE WEAK,
THEREFORE WE ARE NOT ANTICIPATING MUCH IN THE WAY OF QPF.

FOR SUNDAY...A COLD FRONT LOOKS TO BE CROSSING THE AREA MAINLY
DURING THE MORNING, ALTHOUGH THIS BOUNDARY MAY THEN STALL TO OUR
SOUTH. AS MENTIONED ABOVE, THIS FRONT LOOKS TO LACK DEEP MOISTURE
AND LIFT THEREFORE NOT EXPECTING MUCH WITH IT. THE FLOW IS GENERALLY
WESTERLY WITH THE AIRMASS MODERATING SOME ESPECIALLY FROM THE
SOUTHERN ZONES ON SOUTHWARD. DUE TO SOME ADDED DOWNSLOPING, THE
COASTAL PLAIN ESPECIALLY MAY END UP BEING WARMER.

FOR MONDAY AND TUESDAY...A STALLED FRONTAL BOUNDARY LOOKS TO BE
POSITIONED WELL TO OUR SOUTH. AS AN UPPER-LEVEL TROUGH AMPLIFIES
ACROSS THE NORTHEAST, SURFACE HIGH PRESSURE BEGINS TO BUILD IN FROM
THE GREAT LAKES MONDAY. THIS SURFACE HIGH SHOULD THEN SLIDE ACROSS
OUR AREA TUESDAY. A DRY FORECAST OVERALL ATTM.

&&

.AVIATION /16Z WEDNESDAY THROUGH SUNDAY/...
THE FOLLOWING DISCUSSION IS FOR KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY AND SURROUNDING AREAS.

12Z TAF UPDATE...INCREASING CONFIDENCE IN A LOW LEVEL JET
DEVELOPING BY MID DAY. WITH DIRECTIONAL AND SPEED SHEAR EXPECTED,
HAVE ADDED MENTION OF LLWS TO ALL TAFS FROM MID DAY UNTIL LATE
TONIGHT WHEN THE JET MOVES OFF SHORE. STILL NOT ENOUGH CONFIDENCE
IN TIMING OR COVERAGE OF THUNDERSTORMS TO INCLUDE MENTION IN THE
TAFS FOR NOW.

PREVIOUS AVIATION DISCUSSION....WIDESPREAD IFR CEILINGS ARE
EXPECTED FOR MUCH OF THE DAY. EXPECT SOME BREAKS IN THE SHRA,
ESPECIALLY THIS MORNING, BUT BY 18Z, EXPECT LOWERING CEILINGS AND
MORE WIDESPREAD SHRA. THERE REMAINS A SMALL RISK FOR TSRA FOR
TERMINALS NEAR AND SOUTH OF KPHL THROUGH THE DAY, AND ALL
TERMINALS AFTER 00Z. HOWEVER, COVERAGE IS EXPECTED TO BE VERY
LIMITED, SO HAVE NOT MENTIONED IN THE TAFS AT THIS TIME.

WINDS WILL BE BREEZY FOR MUCH OF THE TAF PERIOD. SLOWLY SHIFTING
FROM EASTERLY TO SOUTHEASTERLY THROUGH THE DAY.

DRIER AIR SHOULD BEGIN TO MOVE INTO THE REGION AFTER 06Z, SO EXPECT
SLOW IMPROVEMENT LATE TONIGHT.

OUTLOOK...
THURSDAY...IFR/MVFR IMPROVING TO VFR DURING THE AFTERNOON. SHOWERS
WILL CONTINUE, HOWEVER THEY SHOULD BECOME MORE SCATTERED AND A
THUNDERSTORM CANNOT BE RULED OUT. SOUTHWEST WINDS 10 TO 15 KNOTS,
BECOMING WEST-NORTHWEST AT NIGHT AND DIMINISHING SOME.

FRIDAY...OVERALL VFR. A FEW SHOWERS ARE POSSIBLE IN THE AFTERNOON
FROM NEAR KABE TO THE NORTH AND WEST. WEST-SOUTHWEST WINDS GENERALLY
10 TO 15 KNOTS.

SATURDAY AND SUNDAY...OVERALL VFR. SOME SHOWERS ARE POSSIBLE MAINLY
SATURDAY ESPECIALLY NORTH AND WEST OF KPHL AS A COLD FRONT MOVES
THROUGH.

&&

.MARINE...
HAVE OPTED TO EXTEND THE GALE WARNING ON THE NRN WATERS THROUGH
NOON. THINGS MAY COME DOWN A BIT SOONER, BUT HAVE BEEN SLOW TO DO
SO THIS MORNING.

PREVIOUS MARINE DISCUSSION...GALE GUSTS CONTINUE, SO HAVE KEPT THE
GALE WARNING GOING THROUGH 5 AM EDT. AFTER THAT, SCA CONDITIONS
FOR BOTH WINDS AND SEAS ARE EXPECTED TO CONTINUE ALL DAY TODAY AND
OVERNIGHT TONIGHT. ISOLATED GUSTS ABOVE 30KT WILL AGAIN BE
POSSIBLE THIS EVENING.

OUTLOOK...
THURSDAY..GUSTY SOUTHWESTERLY WINDS AHEAD OF A COLD FRONT TO START
SHOULD DIMINISH SOME THROUGH THE DAY, THEN SHIFT TO THE WEST AND
NORTHWEST AT NIGHT. THE SEAS ON THE OCEAN ARE FORECAST TO BE AT OR
ABOVE 5 FEET, THEREFORE SMALL CRAFT ADVISORY CONDITIONS ARE
ANTICIPATED. THE SEAS MAY DROP BELOW 5 FEET THOUGH LATER AT NIGHT.

FRIDAY THROUGH SUNDAY...THE CONDITIONS ARE ANTICIPATED TO BE BELOW
SMALL CRAFT ADVISORY CRITERIA. A COLD FRONT MOVING THROUGH LATE
SATURDAY AND SUNDAY LOOKS TO BE ON THE WEAKER SIDE, WITH MOSTLY A
WIND SHIFT.

&&

.HYDROLOGY...
SO FAR, RAIN HAS BEEN LIGHT AND/OR INTERMITTENT ENOUGH THAT WE
HAVEN'T SEEN ANY FLOODING ISSUES OR SIGNIFICANT RISES ON SMALL
STREAMS. HOWEVER, THE HEAVIEST RAIN IS EXPECTED THROUGH THE DAY
TODAY INTO THIS EVENING, SO THE FLOODING THREAT REMAINS. THE BIGGEST
CHANGE WITH THE PREVIOUS FORECAST IS THAT THE AXIS OF HIGHEST QPF
AND HEAVIEST RAINS LOOKS TO STAY WELL WEST OF THE I-95 CORRIDOR. AND
WITH THIS SHIFT FURTHER WEST, DAY 1 QPF FOR OUR REGION IS NOW
EXPECTED TO BE IN THE 1 TO 3 INCH RANGE. HOWEVER, AS HAS BEEN
MENTIONED BY PREVIOUS SHIFTS, THERE IS QUITE A BIT OF UNCERTAINTY AS
TO WHERE THE HEAVIEST RAIN WILL SET UP.

MUCH HIGHER THAN NORMAL PWAT VALUES, MOIST LOW LEVEL JET, AND A DEEP
WARM CLOUD LAYER WILL ALL BE IN PLACE LATER TODAY AS THE WARM FRONT
MOVES INTO OUR REGION. THUS, HAVE CONTINUED WITH THE FLOOD WATCH
GENERALLY FOR LOCATIONS ALONG AND WEST OF THE I-95 CORRIDOR.

FOR DETAILED INFORMATION REGARDING FLOOD POTENTIAL ALONG SPECIFIC
STREAMS AND RIVERS, PLEASE REFERENCE THE AHPS WEBSITE.

&&

.TIDES/COASTAL FLOODING...
WILL ISSUE A CF ADVISORY FOR DEL BAY AS LEVELS WILL BE CLOSE OR
SLIGHTLY OVER WITH THE AFTN HIGH TIDE.

PREVIOUS DISCUSSION...COASTAL FLOOD ADVISORIES REMAIN IN EFFECT
FOR THE TIDAL DELAWARE RIVER AND THE CHESAPEAKE BAY.

FOR THE MOST PART THE HIGH TIDE CYCLE THAT JUST HAPPENED SHOULD BE
THE HIGHEST TIDES WE WILL SEE THROUGH THIS STORM SYSTEM. THE
EXCEPTION TO THIS IS THE CHESAPEAKE BAY, WHICH MAY SEE COASTAL
FLOODING FOR THE NEXT 3 HIGH TIDE CYCLES, THANKS TO FLOW TURNING
MORE SOUTHERLY THROUGH THE DAY TODAY.

FOR THE ATLANTIC COASTAL, DELAWARE BAY, AND TIDAL DELAWARE RIVER
LOCATIONS, ADDITIONAL COASTAL FLOODING IS UNLIKELY, BUT FRESH WATER
RUNOFF FROM HEAVY RAIN TODAY COULD INCREASE THE POTENTIAL FOR MINOR
TIDAL FLOODING ESPECIALLY ALONG THE DELAWARE RIVER.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...FLOOD WATCH THROUGH THURSDAY MORNING FOR PAZ054-055-060>062-
     070-071-101>106.
     COASTAL FLOOD ADVISORY UNTIL 5 PM EDT THIS AFTERNOON FOR
     PAZ070-071-106.
NJ...FLOOD WATCH THROUGH THURSDAY MORNING FOR NJZ001-007>010-012-
     013-015>019.
     COASTAL FLOOD ADVISORY UNTIL 5 PM EDT THIS AFTERNOON FOR
     NJZ015>019.
DE...FLOOD WATCH THROUGH THURSDAY MORNING FOR DEZ001.
     COASTAL FLOOD ADVISORY UNTIL 5 PM EDT THIS AFTERNOON FOR
     DEZ001.
MD...FLOOD WATCH THROUGH THURSDAY MORNING FOR MDZ008-012.
     COASTAL FLOOD ADVISORY UNTIL 11 PM EDT THIS EVENING FOR MDZ008-
     012-015-019-020.
MARINE...SMALL CRAFT ADVISORY UNTIL 2 AM EDT THURSDAY FOR ANZ430-431-
     452>455.
     GALE WARNING UNTIL 4 PM EDT THIS AFTERNOON FOR ANZ450-451.

&&

SYNOPSIS...GORSE
NEAR TERM...JOHNSON/NIERENBERG
SHORT TERM...JOHNSON
LONG TERM...GORSE
AVIATION...GORSE/JOHNSON/NIERENBERG
MARINE...GORSE/JOHNSON/NIERENBERG
HYDROLOGY...
TIDES/COASTAL FLOODING...

Hazardous weather outlook, Apr 30, 10:40 AM EST, 3 hours 52 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1140 AM EDT WED APR 30 2014

NJZ001-007>010-012-013-015-PAZ054-055-061-062-105-011545-
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-WESTERN MONMOUTH-
MERCER-CARBON-MONROE-LEHIGH-NORTHAMPTON-UPPER BUCKS-
1140 AM EDT WED APR 30 2014

...FLOOD WATCH IN EFFECT THROUGH THURSDAY MORNING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW JERSEY...NORTHERN
NEW JERSEY...NORTHWEST NEW JERSEY...EAST CENTRAL
PENNSYLVANIA...NORTHEAST PENNSYLVANIA AND SOUTHEAST 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.

   FLOOD WATCH.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLOOD WATCH.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

DEZ001-NJZ016>019-PAZ060-070-071-101>104-106-011545-
NEW CASTLE-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-BERKS-
DELAWARE-PHILADELPHIA-WESTERN CHESTER-EASTERN CHESTER-
WESTERN MONTGOMERY-EASTERN MONTGOMERY-LOWER BUCKS-
1140 AM EDT WED APR 30 2014

...FLOOD WATCH IN EFFECT THROUGH THURSDAY MORNING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN DELAWARE...SOUTHERN
NEW JERSEY...EAST CENTRAL PENNSYLVANIA AND SOUTHEAST 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.

   FLOOD WATCH.

SOME STRONG THUNDERSTORMS TODAY COULD LOCALLY PRODUCE WIND GUSTS TO
45 MPH, ESPECIALLY THIS AFTERNOON AND THIS EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLOOD WATCH.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

MDZ015-019-020-011545-
QUEEN ANNES-TALBOT-CAROLINE-
1140 AM EDT WED APR 30 2014

...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 11 PM EDT THIS EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MARYLAND.

.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.

   COASTAL FLOOD ADVISORY.

SOME STRONG THUNDERSTORMS TODAY COULD LOCALLY PRODUCE WIND GUSTS TO
45 MPH, ESPECIALLY THIS AFTERNOON AND THIS EVENING.

SOME HEAVY RAIN AT TIMES TODAY AND TONIGHT MAY LEAD TO LOCAL POOR
DRAINAGE FLOODING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

MDZ008-012-011545-
CECIL-KENT MD-
1140 AM EDT WED APR 30 2014

...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 11 PM EDT THIS EVENING...
...FLOOD WATCH IN EFFECT THROUGH THURSDAY MORNING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MARYLAND.

.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.

   FLOOD WATCH.
   COASTAL FLOOD ADVISORY.

SOME STRONG THUNDERSTORMS TODAY COULD LOCALLY PRODUCE WIND GUSTS TO
45 MPH, ESPECIALLY THIS AFTERNOON AND THIS EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLOOD WATCH.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

DEZ002>004-NJZ014-020>027-011545-
KENT-INLAND SUSSEX-DELAWARE BEACHES-EASTERN MONMOUTH-OCEAN-
CUMBERLAND-ATLANTIC-CAPE MAY-ATLANTIC COASTAL CAPE MAY-
COASTAL ATLANTIC-COASTAL OCEAN-SOUTHEASTERN BURLINGTON-
1140 AM EDT WED APR 30 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL DELAWARE...SOUTHERN
DELAWARE...CENTRAL NEW JERSEY AND SOUTHERN NEW JERSEY.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SOME HEAVY RAIN AT TIMES TODAY AND TONIGHT MAY LEAD TO LOCAL POOR
DRAINAGE FLOODING.

SOME STRONG THUNDERSTORMS TODAY COULD LOCALLY PRODUCE WIND GUSTS TO
45 MPH, ESPECIALLY THIS AFTERNOON AND THIS EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

ANZ450-451-011545-
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-
1140 AM EDT WED APR 30 2014

...GALE WARNING IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS.

.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.

   GALE WARNING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

ANZ430-431-452>455-011545-
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 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-
1140 AM EDT WED APR 30 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS AND
DELAWARE BAY WATERS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SOME STRONG THUNDERSTORMS TODAY COULD LOCALLY PRODUCE WIND GUSTS TO
AROUND 35 KNOTS, ESPECIALLY THIS AFTERNOON AND THIS EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, Apr 30, 12:48 PM EST, 1 hour 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
148 PM EDT WED APR 30 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0147 PM     FLASH FLOOD      EAST COVENTRY TWP       40.20N  75.62W
04/30/2014                   CHESTER            PA   TRAINED SPOTTER

            PIGEON CREEK OVERFLOW...HALTEMAN ROAD AND KOLP ROAD
            INTERSECTION IS FLOODED.

&&

EVENT NUMBER PHI1400151

STAFF

Special weather statement, Apr 30, 2:27 PM EST, 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
327 PM EDT WED APR 30 2014

DEZ001-MDZ008-012-015-NJZ007>010-PAZ070-071-101>106-302115-
CECIL MD-DELAWARE PA-EASTERN CHESTER PA-EASTERN MONTGOMERY PA-
HUNTERDON NJ-KENT MD-LOWER BUCKS PA-MORRIS NJ-NEW CASTLE DE-
PHILADELPHIA PA-QUEEN ANNE'S MD-SOMERSET NJ-UPPER BUCKS PA-WARREN NJ-
WESTERN CHESTER PA-WESTERN MONTGOMERY PA-
327 PM EDT WED APR 30 2014

...AN AREA OF SHOWERS AND ISOLATED THUNDERSTORMS WITH VERY HEAVY
RAIN WILL CONTINUE TO AFFECT
BUCKS...CECIL...CHESTER...DELAWARE...HUNTERDON...KENT...MONTGOMERY...
NORTHERN NEW CASTLE...NORTHERN SOMERSET...SOUTHERN MORRIS...SOUTHERN
WARREN...WEST CENTRAL PHILADELPHIA AND WESTERN QUEEN ANNE'S
COUNTIES...

AT 320 PM EDT...AN AREA OF SHOWERS AND ISOLATED THUNDERSTORMS
WITH VERY HEAVY RAIN WAS LOCATED FROM THE WESTERN RARITAN RIVER
VALLEY SOUTHWESTWARD THROUGH THE PHILADELPHIA PENNSYLVANIA SUBURBS
INTO NORTHEAST MARYLAND. THIS AREA IS TRAINING AND ONLY SLOWLY
MOVING EAST.

VERY HEAVY RAIN WILL FALL OVER THE NEXT COUPLE OF HOURS...WITH
HOURLY RAINFALL AMOUNTS OF AROUND HALF AN INCH. THIS WILL EXACERBATE
ONGOING FLOODING AND WILL CAUSE WATER TO FURTHER POND ON ROADS AND
FILL POOR DRAINAGE AREAS. THE RAIN CAN CAUSE RAPID RISES ON SMALL
STREAMS AND CREEKS AND FLOOD THEM IN MANY INSTANCES. PLEASE REFER TO
MORE SPECIFIC FLOOD WARNING PRODUCTS.

THIS AREA WILL AFFECT QUAKERTOWN...GREEN LANE...GLENMOORE...AND
GLENMOORE AROUND 330 PM...PARKESBURG...PUGHTOWN...PUGHTOWN...AND
HAMPTON AROUND 340 PM...BEATTYESTOWN AND FERNDALE AROUND 350 PM.

TAKE ROADWAYS THAT ARE THE LEAST PRONE TO POOR DRAINAGE FLOODING.
EXPECT AN ARDUOUS COMMUTE HOME.

LAT...LON 3918 7628 3932 7619 3943 7601 3952 7599
      3954 7608 3972 7623 3973 7614 3979 7605
      4008 7594 4043 7550 4061 7520 4068 7518
      4086 7495 4078 7440 4035 7486 4034 7494
      4032 7490 3933 7585 3899 7622

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

10 flood. Local standard time, as filed.

Flood, Hunterdon

When: April 30, 2:32 PM EST to 11:59 PM EST
Where: Hunterdon County, 1.72 mi ENE of Reaville to 1.48 mi E of Whitehouse
Cause: Heavy Rain
Property damage: $250,000
Reported by: River/Stream Gage
Coordinates: 40.488, -74.789

Heavy rain caused poor drainage flooding in Hunterdon County and river flooding in the eastern part of the county. In Raritan Township, access to 50 homes was cut off for several hours after the Black River flooded near the Copper Hill Country Club. A woman was rescued from Neshanic River flooding in East Amwell Township. U.S. Route 22 was closed in Readington Township due to the flooding. Other major roadways that were flooded and closed included County Route 629 in Readington, Hampton Corner Road in Raritan and Hamden Road in Franklin. The Neshanic River at Reaville was above its 6.5 foot flood stage from 332 p.m. EDT on the 30th through 401 a.m. EDT on the 1st. It crested at 11.46 feet at 830 p.m. EDT on the 30th. It was the 7th highest crest on record and the highest since Tropical Storm Irene on August 28, 2011. The South Branch of the Raritan River at Stanton had minor flooding and was above its 8 foot flood stage from 100 a.m. EDT through 202 p.m. EDT on May 1st. It crested at 8.71 feet at 700 a.m. EDT on May 1st.

Event precipitation totals included 5.93 inches in Tewksbury Township, 5.08 inches in Lebanon, 5.00 inches in Whitehouse Station, 4.68 inches in Readington, 4.59 inches in Flemington and Clinton and 4.58 inches in Franklin Township.

Flood, Somerset

When: April 30, 3:45 PM EST to 11:59 PM EST
Where: Somerset County, 1.88 mi W of Peapack to 2.23 mi WNW of Blawenburg
Cause: Heavy Rain
Property damage: $1.0 million
Reported by: River/Stream Gage
Coordinates: 40.720, -74.706

Very heavy rain caused considerable poor drainage flooding in Somerset County as well as major river flooding. Major flooding occurred along the Millstone and the main stem of the Raritan River, the worst flooding since Tropical Storm Irene on August 28th and 29th in 2011. Flooding forced the closure of U.S. Route 206 in both directions south of Brooks Boulevard and south of County Route 608 or Dukes Parkway in Hillsborough Township and westbound U.S. Route 22 at Rock Avenue in North Plainfield. The exit ramps off of Interstate 287 at southbound exit 14 were flooded and closed in Bridgewater Township. Many other roadways were flooded and closed in the county. In Franklin, Branchburg and Bridgewater Townships alone, there were 22 roads that were flooded and closed. | |The Millstone River had major flooding and the worst flooding along the river since Tropical Storm Irene on August 28th and 29th in 2011. The Millstone River at Griggstown was above its 10 foot flood stage from 543 p.m. EDT on the 30th through 130 p.m. EDT on May 3rd. It crested at 18.56 feet at 1030 a.m. EDT on May 1st, the 7th highest crest on record. Farther downstream, the Millstone River at Blackwells Mills was above its 9 foot flood stage from 945 p.m. EDT on the 30th through 115 a.m. EDT on May 3rd. It crested at 15.87 feet at Noon EDT on May 1st, also the 7th highest crest on record. Farther downstream, the Millstone River at Millstone was above its 10 foot flood stage from 1120 p.m. EDT on the 30th through 1233 a.m. EDT on May 3rd. It crested at 16.80 feet at 1145 a.m. EDT on May 1st. Farther downstream, the Millstone River at Weston was above its 11.5 foot flood stage from 1243 a.m. EDT on May 1st through 621 a.m. EDT on May 2nd. It crested at 16.72 feet at 1000 a.m. EDT on May 1st.

The North Branch of the Raritan River at North Branch was above its 12.3 foot flood stage from 640 p.m. EDT on the 30th through 756 a.m. EDT on May 1st. It crested at 16.10 feet at 1245 a.m. EDT on May 1st, and this was historically the 7th highest crest on record. Farther downstream, the North Branch of the Raritan River at Raritan had minor flooding and was above its 10 foot flood stage from 831 p.m. EDT on the 30th through 1021 a.m. EDT on May 1st. It crested at 13.29 feet at 245 a.m. EDT on May 1st, the 9th highest crest on record and the highest since Tropical Storm Irene on August 28, 2011. Farther downstream, the North Branch of the Raritan River at South Branch was above its 7 foot flood stage from 445 p.m. EDT on the 30th through 721 p.m. EDT on May 1st. It crested at 13.52 feet at 215 a.m. EDT on May 1st.

The Main Stem of the Raritan River had major flooding and its worst flooding since Tropical Storm Irene on August 28, 2011. At Manville, the Raritan River was above its 14 foot flood stage from 1056 p.m. EDT on the 30th through 1220 a.m. EDT on May 2nd. It crested at 20.25 feet at 745 a.m. EDT on May 1st, the 9th highest crest on record. Farther downstream, the Raritan River at Bound Brook was above its 28 foot flood stage from 1117 p.m. EDT on the 30th through 445 a.m. EDT on May 2nd. It crested at 34.65 feet at 945 a.m. EDT on the 1st, its 7th highest crest on record.

The Lamington River at Burnt Mills was above its 11 foot flood stage from 638 p.m. EDT on the 30th through 411 a.m. EDT on May 1st, and it crested at 13.06 feet at 1045 p.m. EDT on the 30th. The Middle Brook at Burnt Mills was above its 9.5 foot flood stage from 710 p.m. EDT through 818 p.m. EDT on the 30th. It crested at 9.55 feet at 745 p.m. EDT. Farther downstream, the Middle Brook at Bound Brook was above its 11 foot flood stage from 520 a.m. EDT through 230 p.m. EDT on May 1st. It crested at 12.22 feet at 930 a.m. EDT, the 5th highest crest on record and the highest since August 28, 2011. The Green Brook at Plainfield was above its 8 foot flood stage from 508 p.m. EDT on the 30th through 327 a.m. EDT on May 1st. It crested at 9.92 feet at 9 p.m. EDT on the 30th. The Bound Brook at Middlesex Borough had minor flooding and was above its 9 foot flood stage from 1010 p.m. EDT on the 30th through 923 a.m. EDT on May 1st. It crested at 10.40 feet at 145 a.m. EDT on May 1st, the 6th highest crest on record and the highest since Tropical Storm Irene on August 28, 2011. The Stony Brook at North Plainfield was briefly above its 7 foot flood stage from 722 p.m. EDT through 746 p.m. EDT on the 30th. It crested at 7.05 feet at 730 p.m. EDT.

Event precipitation totals included 5.29 inches in Greenbrook Township, 5.02 inches in Warren Township, 4.72 inches in Franklin Township, 4.59 inches in Bridgewater Township and 4.52 inches in Montgomery Township.

Flood, Mercer

When: April 30, 4:52 PM EST to 11:59 PM EST
Where: Mercer County, 2.39 mi WNW of Titusville to 1.63 mi SSW of Agasote
Cause: Heavy Rain
Property damage: $250,000
Reported by: River/Stream Gage
Coordinates: 40.334, -74.921

Very heavy rain caused considerable roadway flooding and closures and the highest creek flooding in Mercer County since Tropical Storm Irene on August 28, 2011. Flooding forced the entire closure of New Jersey State Route 33 in two locations in East Windsor Township and the closure of the northbound lanes of U.S. Route 130 in Robbinsville. Numerous roadways were flooded throughout Hopewell Township. Flooding and lane closures occurred on Interstate 95 in Robbinsville and emergency repairs had to be done on the northbound breakdown lane of New Jersey State Route 29 in Trenton.

The Assunpink Creek had major flooding and its highest crest since Tropical Storm Irene on August 28, 2011. At Mercerville, the Assunpink Creek was above its 9.5 foot flood stage from 552 p.m. EDT on the 30th through 538 p.m. EDT on May 1st. It crested at 14.29 feet at 230 a.m. EDT on May 1st. This was historically the 3rd highest crest on record for the creek. At Trenton, the Assunpink Creek was above its 7 foot flood stage from 604 p.m. EDT on the 30th through 437 p.m. EDT on May 1st. It crested at 11.62 feet at 345 a.m. EDT on May 1st. This was historically the 8th highest crest on record for the creek. The Stony Brook at Princeton was above its 9 foot flood stage from 633 p.m. on the 30th through 559 a.m. EDT on May 1st. It crested at 12.18 feet at 130 a.m. EDT on May 1st. This was historically the 5th highest crest on record for the brook and the highest crest since August 28, 2011 associated with Tropical Storm Irene. The Crosswicks Creek at Extonville was above its 12 foot flood stage from 146 a.m. EDT through 857 p.m. EDT on May 1st . It crested at 14.30 feet at 845 a.m. EDT on the 1st. This was the 3rd highest crest on record and the highest since Tropical Storm Irene on August 28, 2011.

Event precipitation totals included 6.02 inches in Robbinsville Township, 5.96 inches in Hamilton Township, 5.65 inches in East Windsor Township, 5.40 inches in West Windsor Township, 5.33 inches in Lawrence Township and 4.36 inches at the Trenton Airport.

Flood, Camden

When: April 30, 4:54 PM EST to 11:59 PM EST
Where: Camden County, 3.52 mi ENE of Ashland to 2.54 mi NE of Hilltop
Cause: Heavy Rain
Property damage: $250,000
Reported by: River/Stream Gage
Coordinates: 39.888, -74.938

The very heavy rain caused roadway as well as creek and river flooding in Camden County, especially in the northern half of the county. Tidal flooding along the Delaware River exacerbated the flooding. In Brooklawn, U.S. Route 130 was flooded and closed in both directions near the Big Timber Creek. In Camden, U.S. Route 130 was also closed. In Pennsauken Township, flooding along the Cooper River closed U.S. Route 30 at the Airport Circle. U.S. Route 30 was also closed in two other locations within the township. Heavily traveled New Jersey State Route 73 was also flooded and closed within the township at Remington Avenue.

The South Branch of the Pennsauken Creek at Cherry Hill was above its 9 foot flood stage from 554 p.m. EDT on the 30th through 556 a.m. EDT on May 1st. It crested at 10.53 feet at 1230 a.m. EDT on May 1st. The Cooper River at Haddonfield had minor flooding, but its 4th highest crest on record and the highest since Tropical Storm Irene on August 28, 2011. The Cooper River was above its 4.5 foot flood stage (the flood stage was revised upward) from 1023 p.m. EDT on the 30th through 206 a.m. EDT on May 1st. It crested at 4.89 feet at 1145 p.m. EDT on April 30th.

Event precipitation totals included 4.56 inches in Blackwood, 4.53 inches in Merchantville, 4.44 inches in Collingswood, 4.16 inches in Lindenwold and 4.07 inches in Sicklerville.

Flood, Burlington

When: April 30, 4:54 PM EST to 11:59 PM EST
Where: Burlington County, 1.09 mi WNW of Riverton to 0.94 mi SE of Kresson
Cause: Heavy Rain
Property damage: $500,000
Reported by: River/Stream Gage
Coordinates: 40.004, -75.040

Very heavy rain caused considerable poor drainage and creek flooding in the northern two-thirds of Burlington County. Municipalities along the branches of the Rancocas Creek were hardest hit by the flooding, in particular Lumberton and Mount Holly. County Route 541 through Lumberton was closed through the morning of May 2nd because of flooding along the South Branch of the Rancocas Creek. Residents from 30 homes in Lumberton Township were evacuated. Four to five homes in Lumberton suffered damage onto the first floor. Most of the other home damage in the township involved flooded basements or damaged vehicles. Along the North Branch of the Rancocas Creek, the Mount Holly Municipal Building was flooded, and the township’s Buttonwood Dam was badly damaged. Floodwaters along the creek were lapping at homes in Eastampton Township. Residents from several homes in Medford near the Southwest Branch of the Rancocas Creek were also evacuated. All families in the county displaced by flooding were able to return to their homes. | |Major roadways that were flooded and closed included New Jersey State Route 73 in Maple Shade Township and New Jersey State Route 70 in Medford Township. Major roadway partial closures included New Jersey State Route 38 in Moorestown and Mount Laurel Townships, New Jersey State Route 73 in Palmyra Township, U.S. Route 130 in Burlington Township and U.S. Route 206 in Bordentown Township. | |The North Branch of the Rancocas Creek at Pemberton had minor flooding and was above its 2.5 foot flood stage from 750 p.m. EDT on the 30th through 430 p.m. EDT on May 3rd. It crested at 2.98 feet at 1100 p.m. EDT on May 1st. Farther downstream, a new gage along the North Branch of the Rancocas Creek at Iron Work Park was above its 11.7 foot flood stage from 1135 p.m. EDT on the 30th through 905 a.m. EDT on the 2nd. It crested at 13.80 feet at 815 a.m. EDT on May 1st. The South Branch of the Rancocas Creek at Vincentown was above its 7 foot flood stage from 1007 p.m. EDT on the 30th through 756 p.m. EDT on May 1st. It crested at 8.60 feet at 530 a.m. EDT on the 1st, the 4th highest crest on record and the highest since Tropical Storm Irene on August 28, 2011. The Southwest Branch of the Rancocas Creek at Medford was above its 12 foot flood stage from 922 p.m. EDT on the 30th through 1116 a.m. EDT on May 1st. It crested at 14.38 feet at 230 a.m. EDT on the 1st, the 4th highest crest on record and the highest since the nor easter on April 16, 2007. The South Branch of the Pennsauken Creek at Cherry Hill was above its 9 foot flood stage from 554 p.m. EDT on the 30th through 556 a.m. EDT on May 1st. It crested at 10.53 feet at 1230 a.m. EDT on May 1st.

The Greenwood Branch at New Lisbon had minor flooding and was above its 5 foot flood stage from 748 a.m. EDT on the 1st through 245 a.m. EDT on the 3rd. It crested at 6.25 feet at 1045 p.m. EDT on the 1st. The Crosswicks Creek at Extonville was above its 12 foot flood stage from 146 a.m. EDT through 857 p.m. EDT on May 1st. It crested at 14.30 feet at 845 a.m. EDT on the 1st. This was the 3rd highest crest on record and the highest since Tropical Storm Irene on August 28, 2011.

Event precipitation totals included 6.32 inches in Riverton, 5.44 inches in Medford Township, 5.28 inches in Crosswicks, 5.23 inches in Moorestown, 5.14 inches in Mount Laurel and 4.96 inches at the Mount Holly WFO.

Flood, Warren

When: April 30, 5:27 PM EST to 11:59 PM EST
Where: Warren County, 0.42 mi W of Paulina to 1.04 mi WNW of Blairstown
Cause: Heavy Rain
Reported by: River/Stream Gage
Coordinates: 40.980, -74.938

Heavy rain caused poor drainage flooding in Warren County as well as some river flooding in the county. The Pequest River at Pequest was above its 4 foot flood stage from 627 p.m. EDT on the 30th through 200 a.m. EDT on the 3rd. It crested at 4.60 feet at 330 a.m. EDT on May 1st . It was the 9th highest crest on record and the highest since the remnants of Tropical Storm Lee on September 8, 2011. The Paulins Kill at Blairstown was above its 5 foot flood stage from 100 a.m. EDT through 515 a.m. EDT on May 1st. It crested at 6.10 feet at 1030 a.m. EDT on May 1st .

Event precipitation totals included 4.80 inches in Washington, 4.61 inches in White Township, 4.11 inches in Blairstown Township, 4.08 inches in Mansfield Township and 4.06 inches in Broadway.

Flood, Morris

When: April 30, 5:37 PM EST to 11:59 PM EST
Where: Morris County, 0.86 mi SSE of Chatham to 1.05 mi SSW of Brookside
Cause: Heavy Rain
Property damage: $1.3 million
Reported by: River/Stream Gage
Coordinates: 40.718, -74.395

Very heavy rain caused poor drainage flooding as well as minor to moderate flooding in the Passaic Basin. Some of the flooding along the Passaic River did not start until May 1st. That flood information is included below and will be repeated in May's stormdata entry. In Roxbury Township, the exit ramps in both directions off of U.S. Route 46 were flooded and closed. The heavy rain forced emergency repair lane closures on Interstate 287 in Parsippany-Troy Hills and Morristown. Mass transit was not immune. Service was suspended along a section of New Jersey Transit's Montclair-Boonton Line until May 5th as workers repaired a track washout. Buses were made available to shuttle passengers between Montclair State University and Denville. The flooding washed away the stones that support the rails between Boonton and Towaco stations early on May 1st. The Passaic River flooded sections of Long Hill Township and Chatham. Some roadways remained closed into May 2nd.

The Passaic River at Chatham had minor flooding and was above its 6 foot flood stage from 637 p.m. EDT on the 30th through 515 a.m. EDT on May 1st. It crested at 6.46 feet at 815 p.m. on the 30th. The Pequannock River at the Macopin Dam had minor flooding and was above its 5.5 foot flood stage from 1120 p.m. EDT on the 30th through 1130 a.m. EDT on May 2nd. It crested at 6.07 feet at 155 p.m. EDT on May 1st. The Whippany River at Morristown had minor flooding and was above its 6 foot flood stage from 711 p.m. EDT on the 30th and 700 a.m. EDT on May 1st. It crested at 6.37 feet at 1100 p.m. EDT on April 30th.

In May, the Passaic River at Millington had minor flooding and was above its 8 foot flood stage from 7 a.m. EDT on May 1st through 445 a.m. EDT on May 3rd. It crested at 8.24 feet at 730 p.m. EDT on May 1st. The Passaic River at Chatham had a second round of minor flooding with a slightly lower crest. The river was above its 6 foot flood stage from 130 p.m. EDT on May 1st through Noon EDT on May 4th. It crested at 6.34 feet at 600 a.m. EDT on May 2nd. The Passaic River at Pine Brook had moderate flooding and was above its 19 foot flood stage from 120 p.m. EDT on May 1st through 845 a.m. EDT on May 6th. It crested at 20.23 feet at 300 p.m. EDT on May 2nd. Lastly, the Passaic River at Two Bridges had minor flooding and was above its 9 foot flood stage from 345 p.m. EDT on May 1st through 730 a.m. EDT on May 6th. It crested at 10.76 feet at 330 a.m. EDT on May 3rd. The Rockaway River below the Boonton Reservoir had minor flooding and was above its 5 foot flood stage from 120 a.m. EDT on May 1st through 300 a.m. EDT on May 3rd . It crested at 6.62 feet at 330 p.m. EDT on the 1st.

Event precipitation totals included 4.89 inches in Chatham, 4.74 inches in Florham Park, 4.70 inches in Madison, 4.58 inches in Chester Township, 4.56 inches in Long Hill Township and 4.53 inches in Morris Township.

Flood, Middlesex

When: April 30, 6:00 PM EST to 11:59 PM EST
Where: Middlesex County, 0.93 mi NW of Avenel to 1.3 mi WNW of Middlesex
Cause: Heavy Rain
Property damage: $500,000
Reported by: Law Enforcement
Coordinates: 40.558, -74.285

Very heavy rain caused considerable roadway flooding in Middlesex County and also caused some brook flooding within the county. Flooding also occurred along the Raritan River. A few of the crests were the highest since Tropical Storm Irene on August 28, 2011. Nearly every major roadway in the county had flooding and many of them were closed. U.S. Route 1 was closed in both directions in South Brunswick Township. New Jersey State Route 28 was closed in two locations in Middlesex Borough. New Jersey State Route 33 was closed in Monroe Township. New Jersey State Route 18 was closed in New Brunswick. New Jersey State Route 171 was closed in North Brunswick and a sink hole also formed. The heavy rain forced emergency repairs on a northbound lane of the Garden State Parkway in Woodbridge.

The Lawrence Brook at Weston Mills was above its 18 foot flood stage from 705 p.m. EDT on the 30th through 830 a.m. EDT on May 1st. It crested at 18.88 feet at 130 a.m. EDT on May 1st. The Bound Brook at Middlesex had minor flooding and was above its 9 foot flood stage from 1010 p.m. EDT on the 30th through 923 a.m. EDT on May 1st. It crested at 10.40 feet at 145 a.m. EDT on the 1st, the 6th highest crest on record and the highest since Tropical Storm Irene on August 28, 2011. The Manalapan Brook at Spotswood was above its 19 foot flood stage from 436 a.m. EDT on May 1st through 407 p.m. EDT on May 2nd. It crested at 20.31 feet at 500 p.m. EDT on the 1st, the 3rd highest crest on record and the highest since Tropical Storm Irene on August 28, 2011.

Event precipitation totals included 5.59 inches in Matawan, 5.22 inches in Edison Township, 4.97 inches in North Brunswick Township, 4.96 inches in Colonia and 4.92 inches in East Brunswick Township and Woodbridge Township.

Flood, Gloucester

When: April 30, 8:00 PM EST to 10:51 PM EST
Where: Gloucester County, 0.59 mi NE of Verga to 0.48 mi N of Gibbstown
Cause: Heavy Rain
Property damage: $250
Reported by: River/Stream Gage
Coordinates: 39.877, -75.144

Very heavy rain caused poor drainage flooding as well as creek flooding in Gloucester County. The tidal flooding along the Delaware River exacerbated the poor drainage flooding in townships along the river. Interstate 295 exits in West Deptford Township were partially blocked due to flooding. Poor drainage flooding caused lane closures along New Jersey State Route 44 in West Deptford Township also. Vans were seen floating in Woodbury.

The Mantua Creek at Pitman had minor flooding and was above its 5 foot flood stage from 907 p.m. EDT through 1151 p.m. EDT on the 30th. It crested at 5.06 feet at 11 p.m. EDT on the 30th.

Event precipitation totals included 5.04 inches in Pitman, 4.60 inches in Sewell and Washington Township, 4.40 inches in Turnersville, 4.20 inches in Woolwich Township and 4.09 inches in Clayton.

Flood, Monmouth

When: April 30, 9:36 PM EST to 11:59 PM EST
Where: Monmouth County, 0.65 mi SW of Manasquan to 0.8 mi SW of Allentown
Cause: Heavy Rain
Property damage: $250,000
Reported by: River/Stream Gage
Coordinates: 40.114, -74.040

Very heavy rain caused poor drainage flooding and river and stream in Monmouth County. The flooding on the creeks and river in some locations were the highest since Tropical Storm Irene on August 28, 2011. New Jersey State Route 35 was hardest hit by the flooding as it was entirely closed in parts of Middletown, Eatontown and Hazlet Townships. New Jersey State Route 71 had lane closures in Deal.

The Manasquan River at Squankum had moderate flooding and was above its 7.5 foot flood stage from 1036 p.m. EDT on the 30th through 733 p.m. EDT on May 1st. It crested at 9.84 feet at 830 a.m. EDT on the 1st, the 6th highest crest on record and the highest since Tropical Storm Irene on August 28, 2011. Farther downstream, the Manasquan River at Allenwood was above its 14.5 foot flood stage from 158 a.m. EDT through 8 p.m. EDT on May 1st. It crested at 16.57 feet at 1015 a.m. EDT on May 1st, the 3rd highest crest on record and the highest since Tropical Storm Irene on August 28, 2011. The Swimming River at Red Bank had minor flooding and was above its 7 foot flood stage from 1109 p.m. EDT on the 30th through 1010 a.m. EDT on May 1st. It crested at 7.73 feet at 315 a.m. EDT on the 1st . The Shark River at Neptune City had minor flooding and was above its 6 foot flood stage from 1212 a.m. EDT through 500 a.m. EDT on May 1st. It crested at 6.18 feet at 130 a.m. EDT.

Event precipitation totals included 5.20 inches in Millstone Township, 4.93 inches in Eatontown, 4.67 inches in Red Bank, 4.58 inches in Keyport and 4.33 inches in Howell Township and Cream Ridge.

What these are

Flood: Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in New Jersey in 2014 Every state in 2014 This day in weather history Warnings in New Jersey, April 2014

Sources

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: 512653, 512652, 512674, 512693, 512727, 512649, 512658, 512671, 512706, 512683.