Flash Flooding and Flooding in New Jersey, September 5 to 14, 2011

Name: Flash Flooding and Flooding in New Jersey, September 5 to 14, 2011
Start: 2011-09-05T21:00
End: 2011-09-14T23:30
Location: New Jersey

September 5 to 14, 2011 · NWS PHI · 23 events in 12 counties and zones

Where it happened

Every event with a place to put it; 4 filed by county or forecast zone are drawn at its center, in a lighter ring. 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: $10 million
Crop damage: None recorded
Events: 23

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.

The remnants of Tropical Storm Lee that interacted with a stalled frontal boundary produced several days with periods of heavy rain across New Jersey from the 5th into the 8th. Event precipitation totals averaged 3 to 8 inches, with lesser amounts in Atlantic, Cape May and eastern Ocean Counties. The heavy rain caused renewed flooding mainly to the west and northwest of the New Jersey Turnpike corridor with mainly moderate flooding along the main stem of the Delaware River with moderate to major flooding in the Passaic and Raritan Basins. Crests were higher on the Delaware River than with Irene as many sites had their highest crests since late June of 2006. The crests along the Delaware River were 2 to 4 feet higher than what occurred during Irene. Elsewhere, nearly all crests were lower than what occurred during Irene. Most of the reported damage occurred in counties bordering the Delaware River as 2 homes were destroyed, 24 suffered major damage, 249 suffered minor damage and 28 others were affected. There were approximately 1,000 people evacuated; other than Morris County, most of the other evacuations occurred in counties bordering the Delaware River. Throughout the state 162 roads were closed due to flooding. The freshwater surge also helped cause moderate tidal flooding along tidal sections of the Delaware River. Preliminary statewide damage was estimated at around 11.5 million dollars. The heavy rain and flooding also took its toll on crops. Farmers reported up to seventy-five percent losses of their pumpkin and tomato crops.

The combination of fresh water runoff and a weak southerly flow produced moderate tidal flooding during the evening high tide cycles from the 7th through the 9th and minor tidal flooding with all of the other high tide cycles from the evening of the 6th through overnight on the 11th. The highest tides occurred during the evening high tide cycle on the 8th. In Burlington County, tidal flooding was reported in Delran and Cinnaminson. In Camden County, the Admiral Wilson Boulevard flooded as did South Park Drive along the Cooper River in Collingswood. In Gloucester County, New Jersey State Route 44 was closed near the Repaupo Creek.

The evening high tide on the 8th in Philadelphia reached 9.41 feet above mean lower low water. Moderate tidal flooding starts at 9.2 feet above mean lower low water. The high tide in Burlington City (Burlington County) reached 10.51 feet above mean lower low water. There is no current categorical tide gage information for this site. While the worst tidal flooding occurred along tidal sections of the Delaware River, widespread minor tidal flooding also occurred in upper Delaware Bay. The high tide reached 7.56 feet above mean lower low water at Reedy Island Delaware (Minor tidal flooding starts at 7.2 feet above mean lower low water).

Tropical Storm Lee made landfall in Louisiana during the morning of the 4th and moved slowly northeast. An approaching cold front from the Mississippi Valley reached Lee by the morning of the 5th and transformed it to an extratropical system on the 5th in Mississippi. The same cold front acted as a conduit for Lee's moisture farther to the northeast. Showers and thunderstorms from that approaching cold front arrived during the evening and overnight on the 5th and set off the first round of flash flooding rains in Northwest New Jersey. The front then stalled just south of Delmarva on the 6th. A relative lull in the rain then occurred during the morning of the 6th. As the front started to back north into New Jersey as a warm front later in the day on the 6th, more bands of heavier rain returned that afternoon and particularly that evening. A blocking weather pattern then moved the frontal boundary little from the morning of the 7th into the morning of the 8th over New Jersey. Most of the precipitation on the 7th remained west of the state. Heavier rain formed north of the stalled frontal boundary in central and northern New Jersey during the evening of the 7th. A band of showers and thunderstorms with heavier rain then moved across the state during the first half of the day on the 8th. The frontal boundary started to drift offshore on the 8th and little if any Lee related precipitation fell in the state after that morning.

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 Sep 5, 8:53 PM EST, 7 minutes earlier.

Area forecast discussion, Sep 5, 8:53 PM EST, 7 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
953 PM EDT MON SEP 5 2011

.SYNOPSIS...
A FRONTAL BOUNDARY WILL PROGRESS EASTWARD AND IT SHOULD PASS
THROUGH OUR REGION DURING THE EVENING AND OVERNIGHT HOURS. THE
FRONT IS ANTICIPATED TO STALL TO OUR SOUTHEAST AND SOUTH DURING
THE MID WEEK PERIOD BEFORE DISSIPATING. WEAK HIGH PRESSURE WILL
TRY TO DRIFT INTO OUR REGION FROM THE NORTH FOR FRIDAY AND
SATURDAY WITH TROPICAL SYSTEM KATIA EXPECTED TO REMAIN OUT OVER
THE WESTERN NORTH ATLANTIC. A COLD FRONT FROM THE NORTH MAY ARRIVE
ON SATURDAY NIGHT OR SUNDAY.

&&

.NEAR TERM /UNTIL 6 AM TUESDAY MORNING/...
THE SURFACE COLD FRONT IS STRETCHING ROUGHLY FROM NORTHEAST NEW
JERSEY TO JUST NORTHEAST OF PHILADELPHIA TO NORTHEAST MARYLAND. THE
FRONT HAS BEEN THE FOCUS FOR LOW TOPPED WARM CONVECTION (WITH
LITTLE OR NO LIGHTNING THE PAST COUPLE OF HOURS). THE 0000 UTC
KLWX SOUNDING SHOWED A PRECIPITABLE WATER VALUE AROUND 2.20
INCHES...AND THIS AIR HAS BEEN FUNNELED ALONG THE FRONT.

WHILE THERE IS A BREAK IN THE HEAVIER RAIN...A LOW LEVEL JET
STREAKING ACROSS WESTERN VIRGINIA AND WESTERN NORTH CAROLINA MAY
SPREAD ANOTHER AREA OF HEAVY RAIN ACROSS THE FRONT LATER TONIGHT.
THE 0000 UTC KGSO SOUNDING HAD A PRECIPITABLE WATER VALUE NEAR
2.00 INCHES...AND THIS AIR WILL ALSO BE FUNNELED UP ALONG THE
FRONT LATE TONIGHT. THIS MOISTURE WILL LIKELY AFFECT NORTHEAST
MARYLAND AND SOUTHERN NEW JERSEY...WHERE THE FRONT WILL BE THE
FOCUS LATER TONIGHT.

NO OTHER SIGNIFICANT CHANGES TO THE FORECAST OVERNIGHT. THE
AIRMASS CHANGES BEHIND THE FRONT...WITH DEW POINTS DROPPING INTO
THE LOWER TO MID 60S. LOWS WERE TWEAKED TO BETTER FIT THE EXPECTED
POSITION OF THE FRONT LATE TONIGHT AND TUESDAY MORNING.

&&

.SHORT TERM /6 AM TUESDAY MORNING THROUGH 6 PM TUESDAY/...
RAIN IS EXPECTED TO PREVAIL TUESDAY AND BE HEAVY AT TIMES...AS
BROAD-SCALE ASCENT WILL REMAIN IN THE VICINITY AND IN THE WAKE OF
THE SURFACE COLD FRONT...AND EXCESSIVE MOISTURE DRIVES UP THE
APPALACHIANS. SEE THE HYDROLOGY SECTION BELOW FOR MORE DETAILS.
ESSENTIALLY...GENERAL RAIN AMOUNTS OF 1.25 TO 1.50 INCHES OF RAIN
ARE EXPECTED THROUGH TUESDAY NORTHWEST...SHADING DOWN TO 0.75 INCHES
OVER OUR SOUTHEASTERN ZONES. HOWEVER...LOCAL AMOUNTS IN BANDS THAT
SET UP MAY BE MUCH HIGHER...HENCE THE FLASH FLOOD WATCH.

AS THE FRONT SLIPS THROUGH THE REST OF THE AREA EARLY TUESDAY...
NORTH WINDS WILL BECOME NORTHEAST AND CAUSE A SHOWERY AND DREARY
DAY.

A RATHER PRONOUNCED LACK OF A DIURNAL TEMPERATURE RANGE IS
EXPECTED WITH RAIN AND CLOUDS AND A NORTHEAST FLOW. MOS GUIDANCE
SOLUTIONS SEEMED ACCEPTABLE WITH THIS IN MIND.

&&

.LONG TERM /TUESDAY NIGHT THROUGH MONDAY/...
DURING THE PERIOD FROM TUESDAY NIGHT THROUGH THURSDAY, THE MID LEVEL
LOW ASSOCIATED WITH THE REMNANTS OF TROPICAL STORM LEE IS EXPECTED
TO DRIFT NORTHWARD FROM THE TENNESSEE RIVER VALLEY TO THE MIDDLE AND
LOWER OHIO RIVER VALLEY. OUR REGION WILL REMAIN UNDER A MOIST
SOUTHERLY FLOW AND WE CONTINUE TO ANTICIPATE PERIODS OF RAIN WITH
SCATTERED TO ISOLATED THUNDERSTORMS. WITH A GOOD MOISTURE SOURCE, WE
EXPECT THE RAIN TO BECOME HEAVY AT TIMES WITH THE POTENTIAL FOR SOME
FLOODING. HOWEVER, THE LATEST GUIDANCE CONTINUES TO SHIFT THE AXIS
OF THE HEAVIEST RAIN TO OUR WEST AND OVER CENTRAL AND WESTERN
PENNSYLVANIA.

WE WILL KEEP THE FLOOD WATCH IN PLACE UNTIL NOON ON WEDNESDAY FOR
NOW. BASED ON HOW EVENTS UNFOLD, WE MAY NEED TO EXTEND IT IN TIME,
PERHAPS FOR SOME OF OUR COUNTIES IN EASTERN PENNSYLVANIA.

ON FRIDAY AND SATURDAY, THE MID LEVEL LOW SHOULD TRANSITION TO AN
OPEN WAVE AS THE MOISTURE ASSOCIATED WITH THE SYSTEM CONTINUES TO
DISSIPATE. MEANWHILE, TROPICAL SYSTEM KATIA CONTINUES TO BE FORECAST
TO TURN BACK OUT OVER THE NORTH ATLANTIC AT THAT TIME. WEAK HIGH
PRESSURE IS EXPECTED TO DRIFT DOWN INTO OUR REGION FROM THE NORTH.
AS A RESULT, WE WILL INDICATE A DECREASING CHANCE FOR SHOWERS.

A FRONTAL BOUNDARY FROM THE NORTH MAY ARRIVE ON SATURDAY NIGHT OR
SUNDAY. IT DOES NOT APPEAR AS THOUGH IT WILL HAVE MUCH MOISTURE
ASSOCIATED WITH IT, SO WE HAVE NOT INCLUDED THE MENTION OF ANY
PRECIPITATION.

TEMPERATURES WILL LIKELY RUN NEAR OR A BIT BELOW NORMAL DURING THE
PERIOD FROM TUESDAY NIGHT THROUGH MONDAY.

&&

.AVIATION /02Z TUESDAY THROUGH SATURDAY/...
THE FOLLOWING DISCUSSION IS FOR KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY AND SURROUNDING AREAS.

THE SURFACE FRONT CONTINUES TO TRUNDLE TO THE EAST...AND IT WILL
BE THE FOCUS FOR HEAVY RAIN AND MVFR/IFR CONDITIONS THIS EVENING
INTO THE EARLY OVERNIGHT HOURS. MVFR/BORDERLINE IFR VISIBILITIES
HAVE ALREADY BEEN SEEN AT KRDG AND KABE IN THE HEAVY RAIN. OUTSIDE
THE RAIN...CONDITIONS CONTINUE VFR.

WITH AND JUST AHEAD OF THE FRONT...WARM PROCESS/LOW TOPPED
CONVECTION WILL CONTINUE TO MOVE EAST...WHILE INDIVIDUAL CELLS
MOVE NORTHEAST. BASED ON THIS...VFR CONDITIONS WILL TRANSITION TO
MVFR FROM WEST TO EAST BETWEEN 0000 UTC AND 0900 UTC (FROM KABE
AND KRDG...WITH KACY SEEING CONDITIONS COME DOWN THE LATEST.

ONCE THE FRONT HAS PASSED...CONDITIONS SHOULD SETTLE INTO THE MVFR
RANGE WITH BOTH CEILINGS AND VISIBILITIES. AS THE NEW AIRMASS
SATURATES...THE LOWER INVERSION SHOULD FILL IN...AND IFR CEILINGS
ARE EXPECTED IN ALL AREAS BETWEEN 0600 UTC AND 1200 UTC TUESDAY.

WINDS HAVE BEEN GUSTING WITH THE PASSAGE OF THE FRONT FROM THE
NORTH...BUT GIVEN THAT MOST PLACES WILL SEE THE FRONTAL PASSAGE
AFTER DARK...GUSTS WERE NOT INCLUDED IN THE FORECAST.

THE LOWER INVERSION REMAINS IN PLACE TUESDAY MORNING...WITH IFR
CEILINGS. THERE IS SOME HINT IN THE MODEL SOUNDINGS THAT THE
INVERSION COULD RISE TO ALLOW CEILINGS TO BRIEFLY REACH MVFR
DURING THE MIDDAY HOURS. HOWEVER...THE NORTHEAST FLOW AND COOLING
OF LATE AFTERNOON PROBABLY BRING CEILINGS BACK TO IFR IN ALL AREAS
BEFORE 0000 UTC WEDNESDAY.

OUTLOOK...
UNSETTLED CONDITIONS ARE EXPECTED FROM TUESDAY NIGHT THROUGH
THURSDAY WITH PERIODS OF RAIN, POSSIBLY HEAVY AT TIMES, ALONG WITH
THE POTENTIAL FOR LOW CEILINGS AND REDUCED VISIBILITY VALUES. A
GRADUAL IMPROVEMENT IS ANTICIPATED FOR THE PERIOD FROM THURSDAY
NIGHT THROUGH SATURDAY AS WEAK HIGH PRESSURE FROM THE NORTH TRIES TO
BUILD INTO OUR REGION.

&&

.MARINE...
THE SMALL CRAFT ADVISORY REMAINS UP FOR THE OCEAN WATERS THROUGH
LATE TUESDAY NIGHT. CONDITIONS ARE TRYING TO SURMOUNT THRESHOLDS THIS
AFTERNOON...BUT HAVE NOT QUITE MADE IT THIS AFTERNOON. THIS IS
EXPECTED TO OCCUR THOUGH LATE THIS AFTERNOON AND THIS EVENING...
AND THEN CONTINUE THROUGH TUESDAY.

AN ONSHORE FLOW IS EXPECTED FROM TUESDAY NIGHT THROUGH THURSDAY. THE
WIND DIRECTION IS FORECAST TO BACK FROM THE NORTHEAST TO THE
NORTHWEST ON FRIDAY AND SATURDAY AS TROPICAL SYSTEM KATIA PASSES
WELL TO OUR EAST. SUSTAINED WIND SPEEDS AND GUSTS ARE FORECAST TO
REMAIN BELOW 25 KNOTS THROUGH THE PERIOD.

WAVES ON OUR OCEAN WATERS ARE EXPECTED TO BUILD AS SWELLS FROM
TROPICAL SYSTEM KATIA REACH THE COASTAL WATERS OF DELAWARE AND NEW
JERSEY. WAVE HEIGHTS MAY REACH 10 FEET OR MORE FROM THURSDAY BASED
ON THE EXPECTED PROGRESS OF THE SYSTEM. IT SEEMS LIKELY THAT WE WILL
NEED A SMALL CRAFT ADVISORY FOR SEAS FOR MUCH OF THE PERIOD FROM
TUESDAY NIGHT THROUGH FRIDAY WITH SOME IMPROVEMENT POSSIBLE FOR
SATURDAY.

&&

.HYDROLOGY...
THE AXIS OF HIGHEST PRECIPITABLE WATER STRETCHES FROM WESTERN
NORTH CAROLINA INTO SOUTHEAST PENNSYLVANIA AND NORTHWEST NEW
JERSEY. THIS IS ROUGHLY PARALLEL TO THE SURFACE FRONT...AND THE
FIRST BATCH OF HEAVY RAIN HAS MOVED INTO NORTHERN NEW JERSEY.
RAINFALL AMOUNTS BETWEEN ONE AND ONE-HALF AND TWO AND ONE-HALF
INCHES HAVE OCCURRED.

ANOTHER BATCH OF HEAVY RAIN STRETCHING FROM WESTERN VIRGINIA INTO
NORTH CENTRAL MARYLAND WILL RIDE UP THE FRONT...AND MOST LIKELY
AFFECT SOUTHEAST PENNSYLVANIA...NORTHEAST MARYLAND AND SOUTHERN
NEW JERSEY LATER TONIGHT. RIGHT NOW...IT APPEARS AS THOUGH THE
HEAVIEST RAIN WILL FALL SOUTH OF THE PASSAIC BASIN. BASED ON THE
ABOVE...NO AREAL OR TEMPORAL CHANGES WERE MADE TO THE FLOOD WATCH.

AFTER A POSSIBLE BREAK TUESDAY...THE NEXT BATCH OF HEAVY RAIN
MOVING NORTHEAST FROM THE FORMER TROPICAL STORM LEE MAY AFFECT
WESTERN AREAS...MAINLY TUESDAY INTO INTO WEDNESDAY MORNING. WHILE
IT APPEARS AS THOUGH THE HEAVIEST RAIN WILL STAY WEST OF THE
AREA...THIS IS NOT CERTAIN YET...AS THERE IS STILL SOME MODEL PLAY
IN THE POSITION OF THE AXIS OF HEAVIEST RAIN/

WITH SATURATED SOIL FROM EXCESSIVE PREVIOUS RAINS...AND ALREADY
HIGH STREAM LEVELS...RUNOFF WILL BE FORCED TO FIND ABOVE GROUND
AVENUES. THIS COULD LEAD TO A RENEWAL OF DANGEROUS FLOODING AROUND
THE AREA.

&&

.RIP CURRENTS...
A MODERATE RISK FOR RIP CURRENTS IS BEING FORECAST FOR TUESDAY AT
THIS POINT. IN-HOUSE GUIDANCE WAS INDICATING A MODERATE RISK FOR
TUESDAY...BUT ON THE CUSP OF HIGH. THIS WILL BE DUE TO A NORTHEAST
FLOW AND A VERY LONG PERIOD TO THE SWELLS. SO...STAY TUNED FOR AN
INCREASE TO THE HIGH RISK CATEGORY IF LATER FORECASTS INDICATE
STRONGER CONDITIONS.

LONG PERIOD SWELLS FROM TROPICAL SYSTEM KATIA WILL LIKELY CAUSE
DANGEROUS RIP CURRENT CONDITIONS ALONG THE COASTS OF DELAWARE AND
NEW JERSEY FROM WEDNESDAY THROUGH AT LEAST FRIDAY.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...FLOOD WATCH THROUGH WEDNESDAY MORNING FOR PAZ054-055-060>062-
     067>071.
NJ...FLOOD WATCH THROUGH WEDNESDAY MORNING FOR NJZ001-007>010-012-
     013-015>019.
DE...FLOOD WATCH THROUGH WEDNESDAY MORNING FOR DEZ001.
MD...FLOOD WATCH THROUGH WEDNESDAY MORNING FOR MDZ008.
MARINE...SMALL CRAFT ADVISORY UNTIL 6 AM EDT WEDNESDAY FOR ANZ450>455.

&&

SYNOPSIS...IOVINO
NEAR TERM...HAYES
SHORT TERM...
LONG TERM...IOVINO
AVIATION...IOVINO/HAYES
MARINE...IOVINO
HYDROLOGY...HAYES
RIP CURRENTS...

Hazardous weather outlook, Sep 5, 2:42 PM EST, 6 hours 18 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
342 PM EDT MON SEP 5 2011

DEZ001-MDZ008-NJZ001-007>010-012-013-015>019-PAZ054-055-060>062-
067>071-062100-
NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-
WESTERN MONMOUTH-MERCER-SALEM-GLOUCESTER-CAMDEN-
NORTHWESTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-
CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA-
342 PM EDT MON SEP 5 2011

...FLOOD WATCH IN EFFECT THROUGH WEDNESDAY MORNING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN 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.

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...TUESDAY THROUGH SUNDAY.

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.

DEZ002-003-MDZ012-015-019-020-NJZ020>023-027-062100-
KENT-INLAND SUSSEX-KENT MD-QUEEN ANNES-TALBOT-CAROLINE-OCEAN-
CUMBERLAND-ATLANTIC-CAPE MAY-SOUTHEASTERN BURLINGTON-
342 PM EDT MON SEP 5 2011

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

DEZ004-NJZ014-024>026-062100-
DELAWARE BEACHES-EASTERN MONMOUTH-ATLANTIC COASTAL CAPE MAY-
COASTAL ATLANTIC-COASTAL OCEAN-
342 PM EDT MON SEP 5 2011

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS A MODERATE RISK OF RIP CURRENTS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THERE IS A MODERATE RISK OF RIP CURRENTS FOR TUESDAY.

LONG PERIOD SWELLS FROM TROPICAL SYSTEM KATIA WILL LIKELY CAUSE
DANGEROUS RIP CURRENT CONDITIONS ALONG THE COASTS OF DELAWARE AND
NEW JERSEY FROM WEDNESDAY THROUGH AT LEAST FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

ANZ450>455-062100-
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-
342 PM EDT MON SEP 5 2011

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT WEDNESDAY...

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.

   SMALL CRAFT ADVISORY.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

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

   SMALL CRAFT ADVISORY.

A SMALL CRAFT ADVISORY FOR SEAS WILL LIKELY BE NEEDED FROM
WEDNESDAY THROUGH AT LEAST FRIDAY DUE TO THE SWELLS FROM TROPICAL
SYSTEM KATIA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

ANZ430-431-062100-
DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
342 PM EDT MON SEP 5 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR DELAWARE BAY WATERS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Sep 5, 5:03 PM EST, 3 hours 57 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
603 PM EDT MON SEP 5 2011

DEZ001-002-MDZ008-012-015-020-NJZ001-007>010-012-015>019-021-
PAZ060>062-067>071-060000-
BERKS PA-BUCKS PA-CAMDEN NJ-CAROLINE MD-CECIL MD-CHESTER PA-
CUMBERLAND NJ-DELAWARE PA-GLOUCESTER NJ-HUNTERDON NJ-KENT MD-KENT DE-
LEHIGH PA-MERCER NJ-MIDDLESEX NJ-MONTGOMERY PA-MORRIS NJ-
NEW CASTLE DE-NORTHAMPTON PA-NORTHWESTERN BURLINGTON NJ-
PHILADELPHIA PA-QUEEN ANNE'S MD-SALEM NJ-SOMERSET NJ-SUSSEX NJ-
WARREN NJ-
603 PM EDT MON SEP 5 2011

...SHOWERS WITH HEAVY RAINFALL WILL AFFECT KENT...CAROLINE...
CECIL...SUSSEX...WARREN...MORRIS...HUNTERDON...SOMERSET...
SALEM...CUMBERLAND...CAMDEN...GLOUCESTER...MERCER...MIDDLESEX...
DELAWARE...PHILADELPHIA...CHESTER...MONTGOMERY...BERKS...LEHIGH...
NORTHAMPTON...BUCKS...QUEEN ANNE'S...NEW CASTLE AND BURLINGTON
COUNTIES...

AT 600 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS ASSOCIATED WITH A SLOW MOVING COLD FRONT OVER NORTHERN NEW
JERSEY, EASTERN PENNSYLVANIA, NORTHERN DELAWARE, AND NORTHEAST
MARYLAND. THE SHOWERS AND POSSIBLY AN ISOLATED THUNDERSTORM OR TWO
WILL MOVE NORTHEAST AT 25 TO 30 MPH THIS EVENING.

VERY HEAVY RAIN WILL FALL FROM SOME OF THESE SHOWERS...AND WILL
CAUSE WATER TO POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND
SMALL STREAMS.

MOTORISTS SHOULD BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS
AND GIVE THEMSELVES EXTRA TRAVEL TIME.

LAT...LON 4120 7437 4104 7449 4097 7427 4059 7444
      4058 7422 3933 7537 3946 7555 3958 7556
      3946 7558 3924 7539 3882 7578 3916 7628
      3951 7599 3972 7624 3978 7607 4014 7590
      4049 7642 4086 7531 4135 7468

RPW

The radar

The Philadelphia radar (KDIX), 145 km away, was scanning. The volume nearest the first event began at 02:01 UTC.

Open the radar archive at this moment

Event by event

12 flood, 7 flash flood, 4 coastal flood. Local standard time, as filed.

Flash Flood, Sussex

When: September 5, 9:00 PM EST to September 6, 12:00 AM EST
Where: Sussex County, 1.48 mi SSW of Owens to 1.38 mi N of Stillwater
Cause: Heavy Rain
Reported by: Mesonet
Coordinates: 41.250, -74.540

Thunderstorms with very heavy rain caused flash flooding of smaller streams as well as poor drainage flooding across eastern Sussex County from Green Township northeast through parts of Andover, Sparta, Hardyston and Vernon Townships. Event precipitation totals into the morning of the 6th included 3.25 inches in Vernon Township, 2.87 inches in Hopatcong, 2.80 inches in Hardyston Township and 2.70 inches in Andover Township.

Flash Flood, Warren

When: September 5, 9:00 PM EST to September 6, 12:00 AM EST
Where: Warren County, 2.08 mi E of Franklin Grove to 0.52 mi SW of Delaware
Cause: Heavy Rain
Reported by: Mesonet
Coordinates: 41.030, -74.930

Thunderstorms with very heavy rain caused flash flooding of smaller streams as well as poor drainage flooding across Warren County from Harmony Township northeast through parts of White, Hope and Blairstown Townships. Event precipitation totals into the morning of the 6th included 3.31 inches in Knowlton Township, 2.98 inches in Blairstown Township, 2.95 inches in White Township and 2.92 inches in Liberty Township.

Flood, Morris

When: September 6, 8:54 AM EST to September 14, 11:30 PM EST
Where: Morris County, Russia to 0.69 mi SW of Stephensburg
Cause: Heavy Rain
Property damage: $1.0 million
Reported by: River/Stream Gage
Coordinates: 41.030, -74.550

Widespread flooding affected Morris County again for the second time within a month. While the overall river crests were lower, major flooding levels were reached again along the Passaic and Pompton Rivers. Voluntary evacuations were requested along the Pompton and Passaic Rivers in Pequannock and Lincoln Park. In addition, the Musconetcong River flooded in Netcong. Homes were flooded along Lake Hopatcong. The Rockaway River flooded in Denville and the Nescopeck Creek flooded homes on Maple Drive in Butler. Sections of U.S. Route 46 and New Jersey State Route 23 were closed.

While major flooding occurred along the Passaic River again, the crests were approximately 2 to 3 feet lower than the crests (record breaking in some instances) with Irene. The Passaic River at Millington was above its 8 foot flood stage from 707 p.m. EDT on the 8th through 530 a.m. EDT on the 9th. It crested at 8.04 feet at 1030 p.m. EDT on the 8th. Farther downstream, the Passaic River at Chatham was above its 6 foot flood stage from 635 a.m. EDT on the 8th through 1200 a.m. EDT on the 11th. It crested at 6.25 feet at 1215 p.m. EDT on the 9th. Farther downstream, the Passaic River at Pine Brook had its ninth highest crest on record and was above its 19 foot flood stage from 700 p.m. EDT on the 6th through 1230 a.m. EDT on the 15th. It crested at 21.73 feet at 930 p.m. EDT on the 9th. This was the last gaged site to go below flood stage with the remnants of Lee. Farther downstream and just east of Morris County along the Passaic and Essex County line, the Passaic River at Two Bridges had its third highest crest on record and was above its 9 foot flood stage from 725 p.m. EDT on the 6th through 545 p.m. EDT on the 14th. It crested at 14.31 feet at 745 p.m. EDT on the 9th.

While major flooding also occurred along the entire length of the Pompton River, the crests were lower than the record breaking flooding that occurred with Irene. Crests on average were 3 to 5 feet lower than Irene. The Pompton River at Pompton Plains had its 10th highest crest on record and was above its 16 foot flood stage from 330 a.m. EDT on the 7th through 815 a.m. EDT on the 10th. It crested at 20.33 feet at 345 p.m. EDT on the 8th. |Farther downstream, the Pompton River at Ryerson Road was above its 12 foot flood stage from 1157 p.m. EDT on the 6th through 642 p.m. EDT on the 12th. It crested at 17.29 feet at 3 a.m. EDT on the 9th. Farther downstream, the Pompton River at Midwood was above its 7.5 foot flood stage from 1207 p.m. EDT on the 6th through 1210 a.m. EDT on the 15th. It crested at 15.15 feet at 1 p.m. EDT on the 9th. Farther downstream, the Pompton River at Mountainview Road was above its 8 foot flood stage from 1139 p.m. EDT on the 6th through 550 p.m. EDT on the 13th. It crested at 13.04 feet at 730 a.m. EDT on the 9th.

The East Ditch at Beaver Brook Road had moderate flooding and was above its 2.5 foot flood stage from 954 a.m. EDT on the 6th through 748 a.m. EDT on the 10th. It crested at 4.40 feet at 1210 p.m. on the 8th. The Rockaway River above the Boonton Reservoir was above its 5 foot flood stage from 622 a.m. EDT through 407 p.m. EDT on the 7th. It crested at 5.13 feet at 1100 a.m. EDT. The Rockaway River above the Boonton Reservoir was above its 5 foot flood stage again from 1145 a.m. EDT on the 8th through 1145 a.m. EDT on the 9th. It crested at 5.50 feet at 630 p.m. EDT on the 8th. The Rockaway River below the Boonton Reservoir had moderate flooding and was above its 5 foot flood stage from 729 p.m. EDT on the 6th through 1216 p.m. EDT on the 11th. It crested at 7.23 feet at 215 a.m. EDT on the 9th. The Whippany Creek at Morristown was above its 6 foot flood stage from 851 p.m. EDT on the 6th through 610 a.m. EDT on the 7th. It crested at 6.4 feet at 915 p.m. EDT on the 6th.

Entire event rainfall totals included 8.70 inches in Lake Hopatcong, 8.35 inches in Kenvil, 7.37 inches in Ironia, 6.86 inches in Berkshire Valley, 6.67 inches in Rockaway and 6.03 inches in Randolph Township.

Flood, Somerset

When: September 6, 6:16 PM EST to September 10, 3:25 PM EST
Where: Somerset County, 2.75 mi W of Peapack to 2.75 mi E of Neshanic Station
Cause: Heavy Rain
Property damage: $1.0 million
Reported by: River/Stream Gage
Coordinates: 40.714, -74.722

Two rounds of heavy rain caused flooding in Somerset County, one from the afternoon through the night of the 6th and the second overnight on the 7th into the morning of the 8th. While most gaged waterways receded to below flood stage between the two rounds of precipitation, the Millstone River did not. The Millstone River flooding will be listed first. Flooding for the other waterways were separated into the two events. While moderate to major flooding occurred along the main stem of the Raritan River and the Millstone River, crests were lower than what just occurred with Irene.

Water rescues were performed in Franklin Township. Vehicles were stuck in flood waters on New Jersey State Route 28 in Branchburg. Flooding forced the closure of Main Street and Dukes Parkway in Manville and U.S. Route 206 in Raritan.

The Millstone River at Griggstown had major flooding and was above its 10 foot flood stage from 831 p.m. EDT on the 6th through 425 p.m. EDT on the 10th. It crested at 16.89 feet at 1230 p.m. EDT on the 8th. Farther downstream, the Millstone River at Blackwells Mills had moderate flooding and was above its 9 foot flood stage from 516 a.m. EDT on the 7th through 209 a.m. EDT on the 10th. It crested at 13.77 feet at 915 p.m. EDT on the 8th. Farther downstream, the Millstone River at Weston was above its 12.4 foot flood stage from 1011 a.m. EDT on the 8th through 1237 p.m. EDT on the 9th. It crested at 15.68 feet at 9 p.m. EDT on the 8th.

During the first flooding rains, the North Branch of the Raritan River at North Branch was above its 12.3 foot flood stage from 1211 a.m. EDT through 708 a.m. EDT on the 7th. It crested at 13.29 feet at 330 a.m. EDT. Farther downstream, the North Branch of the Raritan River at Raritan was above its 10 foot flood stage from 509 a.m. EDT through 647 a.m. EDT on the 7th. It crested at 10.11 feet at 545 a.m. EDT. Farther downstream, the North Branch of the Raritan River at the village of South Branch was above its 7 foot flood stage from 815 p.m. EDT on the 6th through 1253 a.m. EDT on the 8th. It crested at 10.11 feet at 630 a.m. EDT on the 7th. The main stem of the Raritan River at Manville was above its 14 foot flood stage from 613 a.m. EDT through 827 p.m. EDT on the 7th. It crested at 15.61 feet at 1145 a.m. EDT. Farther downstream, the Raritan River at Bound Brook was above its 28 foot flood stage from 805 a.m. EDT through 1007 p.m. EDT on the 7th. It crested at 29.04 feet at 215 p.m. EDT. The Pike Run at Belle Mead was above its 7 foot flood stage from 716 p.m. EDT on the 6th through 1252 a.m. EDT on the 7th. It crested at 8.73 feet at 945 p.m. EDT on the 6th.

During the second and more serious round of flooding rains, the North Branch of the Raritan River at North Branch had its seventh highest crest on record and was above its 12.3 foot flood stage from 724 a.m. EDT through 625 p.m. EDT on the 8th. It crested at 15.67 feet at 1215 p.m. EDT. The North Branch of the Raritan River at Raritan had moderate flooding and its 10th highest crest on record. It was above its 10 foot flood stage from 859 a.m. EDT through 813 p.m. EDT on the 8th. It crested at 12.72 feet at 2 p.m. EDT. Farther downstream, the North Branch of the Raritan River at the village of South Branch had its 8th highest crest on record and was above its 7 foot flood stage from 320 a.m. EDT on the 8th through 1038 a.m. EDT on the 9th. It crested at 12.86 feet at 315 p.m. EDT on the 8th. The main stem of the Raritan River at Manville had moderate flooding and was above its 14 foot flood stage from 745 a.m. EDT on the 8th through 101 p.m. EDT on the 9th. It crested at 19.18 feet at 515 p.m. EDT on the 8th. Farther downstream, the Raritan River at Bound Brook had major flooding and its 9th highest crest on record. It was above its 28 foot flood stage from 640 a.m. EDT on the 8th through 323 p.m. EDT on the 9th. It crested at 33.14 feet at 915 p.m. EDT on the 8th. The Pike Run at Belle Mead was above its 7 foot flood stage from 252 a.m. EDT through 1120 a.m. EDT on the 8th. It crested at 9.19 feet at 800 a.m. EDT.

Entire event rainfall totals included 7.81 inches in Pottersville, 7.16 inches in Skillman, 6.33 inches in Belle Mead, 6.13 inches in Bridgewater Township, 5.85 inches at the Somerville Airport and 5.47 inches in Basking Ridge.

Flood, Hunterdon

When: September 6, 8:52 PM EST to September 7, 4:22 PM EST
Where: Hunterdon County, 0.66 mi E of Sunnyside to 1.18 mi E of Sunnyside
Cause: Heavy Rain
Reported by: River/Stream Gage
Coordinates: 40.579, -74.868

The South Branch of the Raritan River at Stanton was above its 8 foot flood stage from 952 p.m. EDT on the 6th through 522 p.m. EDT on the 7th. It crested at 9.25 feet at 145 a.m. EDT on the 7th.

Flood, Middlesex

When: September 7, 7:05 AM EST to 9:07 PM EST
Where: Middlesex County, 2.76 mi WSW of Middlesex to 0.8 mi NW of Camp Kilmer
Cause: Heavy Rain
Reported by: River/Stream Gage
Coordinates: 40.559, -74.521

Runoff from the heavy rain overnight on the 6th caused minor flooding along the Raritan River. The Raritan River at Bound Brook (Somerset County) was above its 28 foot flood stage from 805 a.m. EDT through 1007 p.m. EDT on the 7th. It crested at 29.04 feet at 215 p.m EDT.

Flood, Sussex

When: September 7, 8:03 AM EST to September 9, 8:05 AM EST
Where: Sussex County, Stanhope to 2 mi NE of Lake Stockholm
Cause: Heavy Rain
Property damage: $1.0 million
Reported by: River/Stream Gage
Coordinates: 40.900, -74.700

The heavy rain caused widespread flooding in Sussex County. Many roadways were closed. Schools were closed on the 8th in Vernon and Sparta Townships. A few homes were flooded in Andover Township. Sections of New Jersey State Route 23 and 94 were closed in Franklin Township and Stockholm (Hardyston Township). The Flat Brook flooded a few homes in southwest Sussex County.

The Flat Brook at Flatbrookville had moderate flooding and was above its 6 foot flood stage from 903 a.m. EDT on the 7th through 905 a.m. EDT on the 9th. It crested at 8.90 feet at 600 p.m. EDT on the 8th. Entire event rainfall totals included 7.93 inches in Montague Township, 7.79 inches in Wantage Township, 7.79 inches in Sussex, 7.32 inches in Andover, 7.23 inches in Pellettown, 6.89 inches in High Point and 5.53 inches in Flatbrookville.

Coastal Flood, Salem

When: September 7, 5:00 PM EST to September 9, 10:00 PM EST
Where: Salem forecast zone
Reported by: River/Stream Gage
Coordinates: 39.577, -75.358 (the zone’s center; the record gives no point)

Flood, Warren

When: September 7, 5:54 PM EST to September 10, 4:40 AM EST
Where: Warren County, Riegelsville to 0.92 mi ENE of Allamuchy
Cause: Heavy Rain
Property damage: $3.0 million
Reported by: River/Stream Gage
Coordinates: 40.600, -75.180

One hundred and thirteen homes were destroyed or damaged by the flooding associated with the remnants of Lee in Warren County. About 50 people were evacuated from flood waters. Two homes were destroyed by flooding induced landslides in Liberty Township in Mountain Lake along Lewis Lane. Another fifteen homes suffered major damage, eighty-eight minor damage and eight more were affected by flood waters. Two homes in the Pohatcong Creek Mobile Home Adult Community in Franklin Township were condemned. The Pequest and Musconetcong Rivers also flooded.

The Delaware River at Tocks Island had moderate flooding, its 6th highest crest on record and highest crest since June 28, 2006. It was above its 21 foot flood stage from 151 a.m. EDT on the 8th through 752 p.m. EDT on the 9th. It crested at 24.95 feet at 2 a.m. EDT on the 9th. Farther downstream, the Delaware River at Phillipsburg had moderate flooding, its 8th highest crest on record and highest crest since June 29, 2006. It was above its 22 foot flood stage from 654 p.m. EDT on the 7th through 355 a.m. EDT on the 10th. It crested at 29.23 feet at 3 a.m. EDT on the 9th. Farther downstream, the Delaware River at Reigelsville had moderate flooding, its 8th highest crest on record and highest crest since June 29, 2006. It was above its 22 foot flood stage from 820 p.m. EDT on the 7th through 540 a.m. EDT on the 10th. It crested at 28.06 feet at 515 a.m. EDT on the 9th.

The entire event precipitation totals included 9.55 inches in Phillipsburg, 9.51 inches in Liberty Township, 8.61 inches in Belvidere, 8.15 inches in Stewartsville and 7.71 inches in Hackettstown.

Coastal Flood, Gloucester

When: September 7, 6:00 PM EST to September 9, 11:00 PM EST
Where: Gloucester forecast zone
Reported by: River/Stream Gage
Coordinates: 39.717, -75.142 (the zone’s center; the record gives no point)

Coastal Flood, Camden

When: September 7, 6:00 PM EST to September 9, 11:00 PM EST
Where: Camden forecast zone
Reported by: River/Stream Gage
Coordinates: 39.804, -74.960 (the zone’s center; the record gives no point)

Coastal Flood, Northwestern Burlington

When: September 7, 7:00 PM EST to September 10, 12:00 AM EST
Where: Northwestern Burlington forecast zone
Reported by: River/Stream Gage
Coordinates: 39.878, -74.668 (the zone’s center; the record gives no point)

Flood, Hunterdon

When: September 8, 1:16 AM EST to September 10, 2:37 AM EST
Where: Hunterdon County, Lambertville to 1.23 mi SSW of Wertsville
Cause: Heavy Rain
Property damage: $2.0 million
Reported by: River/Stream Gage
Coordinates: 40.370, -74.930

One hundred and seven homes were damaged by the flooding associated with the remnants of Lee in Hunterdon County. Three homes suffered major damage, eighty-nine minor damage and fifteen more were affected by flood waters. The New Hope-Lambertville Bridge crossing the Delaware River was closed after a large tree wedged underneath it. The bridge was re-opened on the 9th.

The Delaware River at Frenchtown had moderate flooding, its 8th highest crest on record and highest crest since June 29, 2006. It was above its 16 foot flood stage from 216 a.m. EDT on the 8th through 200 a.m EDT on the 10th. It crested at 19.02 feet at 545 a.m. EDT on the 9th. Farther downstream, the Delaware River at Stockton had moderate flooding, its 10th highest crest on record and highest crest since June 29, 2006. It was above its 18 foot flood stage from 240 a.m. EDT on the 8th through 337 a.m. EDT on the 10th. It crested at 21.76 feet at 645 a.m. EDT on the 8th. Farther downstream, the Delaware River at Lambertville had major flooding, its 11th highest crest on record and highest crest since June 29, 2006. It was above its 13 foot flood stage from 358 a.m. EDT on the 8th through 1215 a.m. EDT on the 10th. It crested at 16.14 feet at 700 a.m. EDT on the 8th.

The South Branch of the Raritan River at High Bridge had minor flooding and was above its 10 foot flood stage from 727 a.m. EDT through 704 p.m. EDT on the 8th. It crested at 10.95 feet at 1215 p.m. EDT. Farther downstream, the South Branch of the Raritan River at Stanton had moderate flooding. It was above its 8 foot flood stage from 352 a.m. EDT on the 8th through 242 a.m. EDT on the 9th. It crested at 11.98 feet at 830 a.m. EDT on the 8th.

The entire event precipitation totals included 7.80 inches in Clinton, 7.20 inches in Kingwood, 7.18 inches in High Bridge, 7.15 inches in Califon, 6.21 inches in Pittstown and 6.19 inches in Flemington.

Flash Flood, Hunterdon

When: September 8, 2:52 AM EST to 8:00 AM EST
Where: Hunterdon County, High Bridge to 0.91 mi NW of Stanton
Cause: Heavy Rain
Reported by: River/Stream Gage
Coordinates: 40.670, -74.900

A band of showers and thunderstorms with heavy rain caused flash flooding of smaller streams as well as poor drainage flooding in central Hunterdon County. Flooding started along the South Branch of the Raritan River and long term flooding along the Delaware River also started during the early morning of the 8th.

Flood, Mercer

When: September 8, 2:58 AM EST to September 10, 4:37 AM EST
Where: Mercer County, 3.38 mi SW of Groveville to 2.76 mi ESE of East Windsor
Cause: Heavy Rain
Property damage: $2.0 million
Reported by: Newspaper
Coordinates: 40.151, -74.721

Eighty-three homes were damaged by the flooding associated with Lee in Mercer County. Six homes suffered major damage, seventy-two minor damage and five more were affected by flood waters. In Trenton, about 250 people were evacuated from their homes in the Island and Glen Afton section of the city. Flooding was also reported along North Clinton Avenue. State workers were dismissed early on the 8th. New Jersey State Route 29 was closed in Trenton and Ewing. Some schools near the Delaware River were closed on the 9th. In Lawrence Township, a voluntary evacuation occurred near Quaker Road because of a pre-existing breach on the Delaware and Raritan canal that was bringing in flood waters from the Stony Brook.

The Delaware River at Washington's Crossing had moderate flooding, its 8th highest crest on record and highest crest since June 29, 2006. It was above its 16 foot flood stage from 358 a.m. EDT on the 8th through 306 a.m. EDT on the 10th. It crested at 20.04 feet at 745 a.m. EDT on the 8th. Farther downstream, the Delaware River at Trenton also had moderate flooding, its 10th highest crest on record and highest crest since June 29, 2006. It was above its 20 foot flood stage from 417 a.m. EDT on the 8th through 537 a.m. EDT on the 10th. It crested at 23.11 feet at 915 a.m. EDT on the 8th. The Assunpink Creek at Trenton had minor flooding and was above its 8.5 foot flood stage from 616 a.m. EDT through 706 p.m. EDT on the 8th. It crested at 9.28 feet at 1145 a.m. EDT.

The entire event precipitation totals included 7.24 inches in Washington's Crossing, 5.42 inches in Lawrence Township, 5.26 inches in Ewing Township, 5.23 inches in Princeton and 4.73 inches at the Mercer County Airport.

Flash Flood, Hunterdon

When: September 8, 3:00 AM EST to 8:00 AM EST
Where: Hunterdon County, 0.54 mi WSW of Lambertville to 0.25 mi WSW of Lambertville
Cause: Heavy Rain
Reported by: Newspaper
Coordinates: 40.367, -74.940

About 400 to 500 residents of Lambertville were evacuated after flash flooding occurred along the Swan Creek.

Flash Flood, Warren

When: September 8, 3:00 AM EST to 8:00 AM EST
Where: Warren County, Blairstown to 0.55 mi NW of Blairstown
Cause: Heavy Rain
Reported by: Newspaper
Coordinates: 40.980, -74.950

Heavy rain caused the overflow of the Paulins Kill Dam and flash flooding along the Paulins Kill in Blairstown. Seven roadways were flooded and there was a voluntary evacuation of the downtown area.

Flash Flood, Sussex

When: September 8, 3:30 AM EST to 7:30 AM EST
Where: Sussex County, 1.29 mi NW of Augusta to 1.11 mi ESE of Branchville
Cause: Heavy Rain
Reported by: Newspaper
Coordinates: 41.144, -74.746

Torrential downpours led to flash flooding along the Culver Creek in Branchville. A State of Emergency was declared after the creek tore away the Mill Street Bridge in the borough. Ten homes had over eight feet of water in them, the most severely damaged were at the end of Mill Street. Residents from about 50 homes evacuated, with residents from all but one home being able to return at Noon EDT that day.

Flash Flood, Mercer

When: September 8, 5:16 AM EST to 8:15 AM EST
Where: Mercer County, 1.01 mi SW of East Trenton to 0.91 mi NNW of Trenton
Cause: Heavy Rain
Reported by: River/Stream Gage
Coordinates: 40.239, -74.742

A band of showers and thunderstorms with heavy rain caused flash flooding of smaller streams as well as poor drainage flooding in central Mercer County. Flooding started along the Assunpink Creek and long term flooding along the Delaware River also started during the early morning of the 8th.

Flood, Middlesex

When: September 8, 5:40 AM EST to September 9, 2:23 PM EST
Where: Middlesex County, 2.76 mi WSW of Middlesex to 0.8 mi NW of Camp Kilmer
Cause: Heavy Rain
Reported by: River/Stream Gage
Coordinates: 40.559, -74.521

A second round of even heavier rain overnight on the 7th into the morning of the 8th produced major flooding along the Raritan River. Its crest though was lower than with Irene. The Raritan River at Bound Brook had major flooding and its 9th highest crest on record. It was above its 28 foot flood stage from 640 a.m. EDT on the 8th through 323 p.m. EDT on the 9th. It crested at 33.14 feet at 915 p.m. EDT on the 8th. Total event precipitation totals included 5.01 inches in South Brunswick, 4.71 inches in Piscataway, 4.50 inches in North Brunswick and 4.28 inches in New Brunswick.

Flood, Camden

When: September 8, 7:49 AM EST to 3:31 PM EST
Where: Camden County, 0.42 mi SE of Haddonfield to 0.69 mi ENE of Woodlynne
Cause: Heavy Rain
Reported by: River/Stream Gage
Coordinates: 39.896, -75.024

Flooding forced the closure of sections of New Jersey State Route 70 and U.S. Route 130 in Camden County. The Cooper River at Haddonfield was above its 2.8 foot flood stage from 849 a.m. EDT through 431 p.m. EDT on the 8th. It crested at 3.71 feet at 1000 a.m. EDT. Entire event rainfall totals included 3.87 inches in Stratford, 2.79 inches in Winslow Township, 2.48 inches in Merchantville and 2.37 inches in Berlin Township.

Flood, Salem

When: September 8, 5:30 PM EST to September 12, 2:15 AM EST
Where: Salem County, Norma to 2.85 mi ENE of Willow Grove
Cause: Heavy Rain
Reported by: River/Stream Gage
Coordinates: 39.500, -75.080

Flood, Cumberland

When: September 8, 5:30 PM EST to September 12, 2:15 AM EST
Where: Cumberland County, 0.34 mi W of Vineland Rudys Arpt to 0.31 mi ENE of Rosenhayn
Cause: Heavy Rain
Reported by: River/Stream Gage
Coordinates: 39.551, -75.076

The Maurice River at Norma was above its 4 foot flood stage from 630 p.m. EDT on the 8th through 315 a.m. EDT on the 12th. It crested at 4.62 feet at 7 a.m. EDT on the 10th. Entire event rainfall totals included 5.50 inches in Newport, 3.75 inches in Bridgeton, 3.41 inches in Greenwich Township, 3.28 inches in Upper Deerfield Township and 1.79 inches at the Millville Municipal Airport.

What these are

Flash Flood: Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
Flood: Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
Coastal Flood: Flooding of coastal land by the sea, from storm surge, onshore wind or high tides.

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

The same day elsewhere

Every storm in New Jersey in 2011 Every state in 2011 This day in weather history Warnings in New Jersey, September 2011

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: 349573, 349574, 350408, 350409, 350288, 350413, 350407, 349706, 349898, 349707, 349708, 349710, 349900, 349593, 349901, 351697, 351703, 351704, 349594, 350414, 350410, 350411, 350412.