Coastal Flood, Salem
- When
- April 18, 11:00 AM EST to April 21, 3:00 AM EST
- Where
- Salem forecast zone
- Reported by
- C-MAN Station
- Coordinates
- 39.577, -75.358 (the zone’s center; the record gives no point)
Coastal Flood in New Jersey, April 18 to 21, 2007
The combination of the leftover onshore flow from the departing nor'easter, fresh water run-off from the heavy rain and the astronomical spring tides caused by the new moon caused tidal flooding along the Delaware River and tidal sections of its tributaries from the afternoon of the 18th into the morning of the 21st. Moderate tidal flooding occurred with the high tide during the early morning of…
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
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 4
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 combination of the leftover onshore flow from the departing nor'easter, fresh water run-off from the heavy rain and the astronomical spring tides caused by the new moon caused tidal flooding along the Delaware River and tidal sections of its tributaries from the afternoon of the 18th into the morning of the 21st. Moderate tidal flooding occurred with the high tide during the early morning of the 19th and minor tidal flooding occurred with the high tides during the afternoons of the 18th and 19th and the early morning of the 20th and 21st. The highest tide in Philadelphia was 9.48 feet above mean lower low water at 336 a.m. EDT on the 19th. Moderate tidal flooding begins at 9.2 feet above mean lower low water.
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 18, 10:25 AM EST, 35 minutes earlier.
Area forecast discussion, Apr 18, 10:25 AM EST, 35 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
ISSUED BY NATIONAL WEATHER SERVICE UPTON NY
1125 AM EDT WED APR 18 2007
.SYNOPSIS...
THE STRONG STORM THAT SOAKED THE AREA SUNDAY INTO MONDAY WILL
CONTINUE TO MOVE SLOWLY EASTWARD AND WELL OFFSHORE OVER THE NEXT FEW
DAYS. HOWEVER, WEAK WEATHER DISTURBANCES WILL CIRCULATE SOUTHWARD ON
THE WEST SIDE OF THAT LOW PRESSURE CENTER TODAY AND THURSDAY. UPPER
LEVEL LOW PRESSURE WILL ALSO MOVE THROUGH THE AREA THURSDAY. HIGH
PRESSURE AT THE SURFACE AND ALOFT WILL BUILD SLOWLY FROM THE WEST
LATE IN THE WEEK, AND BE ALONG THE COAST DURING THE WEEKEND. A WEAK
FRONT IS THEN FORECAST TO MOVE INTO THE REGION EARLY NEXT WEEK.
&&
.NEAR TERM /UNTIL 6 PM THIS EVENING/...
NO MAJOR CHANGES TO THIS MORNINGS UPDATE. HAVE GONE AHEAD AND
UPDATED THE GRIDS TO REFLECT THE LATEST OBSERVATIONS. HAVE ALSO
REMOVED ANY WORDING OF SNOW SHOWERS ACROSS THE FAR NORTHERN ZONES.
OTHERWISE...AS SPOKES OF ENERGY CONTINUE TO ROTATE AROUND THE LOW (SURFACE
AND ALOFT) WHICH IS TO THE EAST OF THE REGION TODAY, ABUNDANT
CLOUDINESS AND SCATTERED LIGHT SHOWERS SHOULD BE THE RESULT.
FORCING SHOULD BE LESS TODAY AS OPPOSED TO YESTERDAY, HOWEVER, AND
PERHAPS FEWER SHOWERS WILL OCCUR AS A CONSEQUENCE. SO, ONLY A 30
POP WAS GENERALLY FORECAST (40 WELL EAST). TONIGHT AND THURSDAY,
HOWEVER, APPEAR TO BE DIFFERENT STORIES.
THERE COULD BE SOME BREAKS IN THE HIGHER LAYERS OF OVERCAST, BUT
THESE SHOULD BE THE EXCEPTION AND NOT THE RULE (WITNESS THE DRY
SLOT THAT WRAPPED INTO THE AREA FROM THE NORTH YESTERDAY MIDDAY
IT WAS SWEPT SOUTHWARD FAIRLY RAPIDLY.)
TEMPERATURES WILL PROBABLY HAVE LITTLE CHANCE TO RISE ABOVE MOS
GUIDANCE TODAY IN VIEW OF THE NORTHERLY FLOW AND THE ABUNDANCE OF
CLOUDS.
&&
.SHORT TERM /6 PM THIS EVENING THROUGH SATURDAY/...
STILL LOTS OF CLOUDS TONIGHT, ALTHOUGH AS THE UPPER LOW SWINGS
INTO THE AREA, WE COULD SEE MORE SHOWERS ESPECIALLY LATER AT
NIGHT. THE GFS WAS LESS GENEROUS WITH THE PRECIPITATION PROBABILITIES
THAN THE NAM AND THE NGM MOS, BUT ONLY BY A SMALL MARGIN. THE
SLIGHTLY HIGHER NAM POPS (MOSTLY LIKELY) WERE ACCEPTED AND USED
FOR THURSDAY THE EXCEPTIONS WERE THE FAR WESTERN AND SOUTHWESTERN
ZONES, WHICH COULD BE FURTHER AWAY FROM THE MAIN ACTION.
HIGH TEMPERATURES THURSDAY SHOULD AGAIN BE SIMILAR TO TODAY,
MEANING WELL BELOW NORMAL (10 DEGREES OR A LITTLE MORE) FOR APRIL
18TH.
&&
.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY NIGHT/...
FOLLOWED HPC GUIDANCE CLOSELY DURING THE PERIOD AS HIGH PRES WILL
BE BUILDING THROUGH THE OH VALLEY BEFORE DROPPING TOWARDS THE
CAROLINAS LATE SAT...THEN MOVING OFFSHORE ON SUN. WX WILL BE DRY
AND HIGH TEMPERATURES WILL BE WARMING INTO THE LOW/MID 60S ALONG
THE COAST...MID/UPPER 60S TO THE NORTH AND AROUND 70 TO THE SOUTH.
WITH BERMUDA HIGH ENTRENCHED OFFSHORE ON MON...THE COMBINATION OF
MO SUNNY SKIES AND SW WINDS WILL PUSH HIGH TEMPERATURES INTO THE
UPPER 60S NEAR THE COAST AND INTO THE 70S THROUGHOUT ON MON.
CONDITIONS BEGIN TO CHANGE ON TUE AS A COLD FRONT MOVES INTO THE
AREA AND BECOMES NEARLY STATIONARY ACROSS SOUTHERN PA...CENTRAL NJ
AND SOUTHERN NY THROUGH THE MIDDLE OF THE WEEK. THIS FRONT WILL
BRING SLIGHTLY COOLER TEMPERATURES...ALONG WITH CLOUDS AND A
CHANCE FOR SHOWERS. &&
.AVIATION /16Z WEDNESDAY THROUGH SUNDAY/...
MOISTURE CONTINUES TO ROTATE AROUND THE OFFSHORE LOW. CIGS AROUND 3000
FT WILL RISE SLIGHTLY TO VFR THIS AFTERNOON. THE WINDS REMAIN
NORTH/NORTHEAST BETWEEN 10 AND 20 KT.
THE TREND THIS EVENING AND OVERNIGHT IS FOR A SOLID WIDESPREAD
DECK IN THE 2,000 TO 2,500 RANGE.
OUTLOOK BEYOND 12Z THURSDAY...BECOMING VFR THURSDAY WITH MVFR
THURSDAY NIGHT DUE TO CLOUDS. VFR FRIDAY THROUGH THE WEEKEND.
&&
.MARINE...
LOW PRESSURE CONTINUES TO MOVE WELL OUT TO SEA BUT ITS AFFECTS
WILL BE FELT ANOTHER 24 TO 36 HOURS. THE WINDS WILL DIMINISH LATER
TODAY BUT THE FLOW AROUND THE LOW PRESSURE WILL BRING LONG PERIOD
NORTHEAST SWELLS TOWARD THE MAINLAND. SMALL CRAFT ADVISORIES WILL
REMAIN UP TODAY FOR WINDS AND FOR SEAS TONIGHT INTO THURSDAY. ON
DELAWARE BAY THE SMALL CRAFT WILL BE LOWER ACROSS THE LOWER BAY
THIS AFTERNOON. ANOTHER WEAKER LOW WILL MOVE FROM THE CENTRAL
APPALACHIANS TO THE COAST BY FRIDAY BUT ITS VERY WEAK AND WILL
NOT BRING ANY THING OTHER THAN SOME LIGHT PRECIPITATION. AS OF 4
AM, THE SEAS AT 44009 ARE 7 FT EVERY SIX SECONDS BUT THE PERIOD
WILL INCREASE TO AROUND 10 SECONDS LATER TODAY. INSIDE THE
DELAWARE BAY THE WAVE HEIGHTS ARE 4 FT, AND ALONG NEARSHORE NJ 2
TO 3 FT AND 3 FT AT BETHANY BEACH DELAWARE. GALE CONDITIONS WILL
CONTINUE OUT IN THE CANYON AREAS UNTIL TONIGHT.
&&
.TIDES/COASTAL FLOODING...
HIGH TIDE HAS OR IS CURRENTLY OCCURRING WITH TIDAL ANOMALIES RUNNING
1 TO 2 FEET ABOVE NORMAL ALONG THE NEW JERSEY SHORE. PERSISTENT
NE WINDS WILL CONTINUE TO CAUSE TIDAL PROBLEMS OVER THE NEXT
COUPLE OF DAYS. NEXT HIGH TIDE IS BETWEEN 9 AND 10 PM. TIDAL
DEPARTURES CONTINUE AT 1 TO 2 FEET ABOVE NORMAL. THIS WILL BE THE
HIGHER OF THE TWO HIGH TIDES...RESULTING IN TIDES ABOUT A FOOT
HIGHER THAN THOSE OBSERVED THIS MORNING.
FORECASTED TIDES...
SANDY HOOK IS 8.1 FEET MLLW AT 927 PM.
ATLANTIC CITY IS 7.2 FEET MLLW AT 906 PM.
CAPE MAY IS 7.8 FEET MLLW AT 940 PM.
THESE VALUES ARE ON THE LOW END OF THE MODERATE RANGE. A FLOOD
ADVISORY WILL BE REQUIRED AND POSSIBLY A COASTAL FLOOD WARNING FOR
THIS EVENING.
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...NONE.
NJ...COASTAL FLOOD ADVISORY FROM 6 PM THIS EVENING TO MIDNIGHT EDT
TONIGHT FOR NJZ012>014-020-022>027.
DE...NONE.
MD...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 7 AM EDT THURSDAY FOR ANZ450>455.
SMALL CRAFT ADVISORY UNTIL 6 PM EDT THIS AFTERNOON FOR ANZ431.
&&Hazardous weather outlook, Apr 18, 4:10 AM EST, 6 hours 50 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 510 AM EDT WED APR 18 2007 DEZ001>004-MDZ008-012-015-019-020-PAZ054-055-060>062-067>071-191200- NEW CASTLE-KENT DE-INLAND SUSSEX-DELAWARE BEACHES-CECIL-KENT MD- QUEEN ANNES-TALBOT-CAROLINE-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON- CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- 510 AM EDT WED APR 18 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR DELAWARE...EASTERN AND NORTHEAST MARYLAND...EAST CENTRAL PENNSYLVANIA...NORTHEAST PENNSYLVANIA AND SOUTHEAST PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .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. NJZ001-007>010-015>019-021-191200- SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MERCER-SALEM-GLOUCESTER- CAMDEN-NORTHWESTERN BURLINGTON-CUMBERLAND- 510 AM EDT WED APR 18 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NEW JERSEY. .DAY ONE...TODAY AND TONIGHT SEE THE FLOOD WARNINGS AND STATEMENTS CONCERNING ONGOING FLOODING IN THE PASSAIC, RARITAN, AND MILLSTONE RIVER BASINS IN NORTHERN AND CENTRAL NEW JERSEY, AS WELL AS ALONG THE RANCOCAS CREEK IN CENTRAL NEW JERSEY, AND ALSO THE MAURICE RIVER AND THE GREAT EGG HARBOR RIVER IN SOUTHERN NEW JERSEY. .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. NJZ012>014-020-022>027-191200- MIDDLESEX-WESTERN MONMOUTH-EASTERN MONMOUTH-OCEAN-ATLANTIC-CAPE MAY- ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC-COASTAL OCEAN- SOUTHEASTERN BURLINGTON- 510 AM EDT WED APR 18 2007 ...COASTAL FLOOD ADVISORY IN EFFECT UNTIL NOON EDT TODAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NEW JERSEY. .DAY ONE...TODAY 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 ALSO, SEE THE FLOOD WARNINGS AND STATEMENTS CONCERNING ONGOING FLOODING IN THE RARITAN RIVER BASIN IN CENTRAL NEW JERSEY, AS WELL AS ALONG THE GREAT EGG HARBOR RIVER IN SOUTHERN NEW JERSEY. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY ADDITIONAL MINOR TIDAL FLOODING MIGHT BE POSSIBLE THURSDAY, ALTHOUGH A COASTAL FLOOD ADVISORY HAS NOT BEEN ISSUED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ450>455-191200- 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- 510 AM EDT WED APR 18 2007 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 AM EDT THURSDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ATLANTIC COASTAL WATERS. .DAY ONE...TODAY 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...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ431-191200- DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- 510 AM EDT WED APR 18 2007 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS AFTERNOON... THIS HAZARDOUS WEATHER OUTLOOK IS FOR LOWER DELAWARE BAY. .DAY ONE...TODAY 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...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ430-191200- DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- 510 AM EDT WED APR 18 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR UPPER DELAWARE BAY. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .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.
The radar
The national radar mosaic for the moment the first event began.
Event by event
4 coastal flood. Local standard time, as filed.
Coastal Flood, Gloucester
- When
- April 18, 12:30 PM EST to April 21, 4:30 AM EST
- Where
- Gloucester forecast zone
- Reported by
- C-MAN Station
- Coordinates
- 39.717, -75.142 (the zone’s center; the record gives no point)
Coastal Flood, Camden
- When
- April 18, 1:00 PM EST to April 21, 5:00 AM EST
- Where
- Camden forecast zone
- Reported by
- C-MAN Station
- Coordinates
- 39.804, -74.960 (the zone’s center; the record gives no point)
Coastal Flood, Northwestern Burlington
- When
- April 18, 2:00 PM EST to April 21, 6:00 AM EST
- Where
- Northwestern Burlington forecast zone
- Reported by
- C-MAN Station
- Coordinates
- 39.878, -74.668 (the zone’s center; the record gives no point)
What these are
- 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
- High Wind and Strong Wind in Colorado, April 18, 2007
- High Wind in Arizona, April 18, 2007
- Winter Storm and Heavy Snow in Utah, April 18 to 20, 2007
- Cold in California, April 18, 2007
- High Wind in California, April 18, 2007
- Coastal Flood in Pennsylvania, April 18 to 21, 2007
- High Wind in Montana, April 18, 2007
- High Wind in California, April 18, 2007
- Astronomical Low Tide in Delaware, April 18, 2007
- Hail in Montana, April 18, 2007
- Astronomical Low Tide in Delaware, April 18 to 20, 2007
- Hail and Damaging Wind in Wyoming, April 18, 2007
More
Every storm in New Jersey in 2007Every state in 2007This day in weather historyWarnings in New Jersey, April 2007
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 2026-10-01. Each event’s entry at NCEI: 30719, 30718, 30716, 30717.