Astronomical Low Tide, Delaware Beaches
- When
- April 18, 6:00 PM EST to 10:00 PM EST
- Where
- Delaware Beaches forecast zone
- Reported by
- C-MAN Station
- Coordinates
- 38.683, -75.339 (the zone’s center; the record gives no point)
Astronomical Low Tide in Delaware, April 18, 2007
The combination of the leftover onshore flow from the departing nor'easter and the astronomical spring tides caused by the new moon caused minor tidal flooding at the time of high tide on the evening of the 18th along the lower Delaware Bay and coastal sections of Sussex County. 83 feet above mean lower low water.
Where it happened
Every event with a place to put it; 2 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
- 2
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 and the astronomical spring tides caused by the new moon caused minor tidal flooding at the time of high tide on the evening of the 18th along the lower Delaware Bay and coastal sections of Sussex County. The high tide at Breakwater Harbor (Sussex County) was 6.83 feet above mean lower low water. Minor tidal flooding begins at 6.7 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, 3:04 PM EST, 2 hours 56 minutes earlier.
Area forecast discussion, Apr 18, 3:04 PM EST, 2 hours 56 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
404 PM EDT WED APR 18 2007
.SYNOPSIS...
THE STRONG STORM THAT AFFECTED OUR REGION OVER THIS PAST WEEKEND
HAS MOVED WELL AWAY FROM THE NEW JERSEY COAST AND WILL CONTINUE ITS
EASTERLY MOVEMENT. THE MID LEVEL LOW OVER THE AREA WILL REMAIN INTO
FRIDAY BEFORE A HIGH PRESSURE SYSTEM MOVES IN FOR THE WEEKEND. A
WEAK FRONT IS THEN FORECAST TO MOVE INTO THE REGION EARLY NEXT
WEEK.
&&
.SHORT TERM /TONIGHT THROUGH FRIDAY/...
LOW PRESSURE OVER THE MIDWEST WILL MOVE TOWARDS THE SOUTH ON
THURSDAY THIS LOW IS RELATIVELY WEAK BUT WILL KICK IN SOME ADDED
MOISTURE AND KEEP THE REGION PRETTY CLOUDY AS WELL AS CONTINUE THE
CHANCE FOR SHOWERS. ALL THE MODELS LOOK TO BE IN PRETTY GOOD
AGREEMENT AS THEY WARM THE TEMPERATURES UP SLOWLY OVER THE NEXT
DAY OR TWO. THEREFORE, WENT WITH A BLEND OF THE GFS AND NAM TEMPS.
TEMPERATURES ARE EXPECTED TO REMAIN BELOW NORMAL AGAIN FOR
THURSDAY BEFORE WARMING UP FOR FRIDAY.
&&
.LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/...
THE LONG TERM WILL FEATURE ABOVE NORMAL TEMPERATURES AS THE GLOBAL
MODELS ARE IN PRETTY GOOD AGREEMENT IN FINALLY KICKING OUT THE MID
LEVEL LOW AND ITS ASSOCIATED SURFACE FEATURE AND REPLACING THEM
WITH A MID LEVEL RIDGE AND ASSOCIATED MILD SURFACE HIGH INTO
MONDAY. A MID LEVEL TROF IS FORECAST TO MOVE UP AND TO FLATTEN THE
RIDGE TO SOME DEGREE FOR TUESDAY INTO WEDNESDAY. THE ASSOCIATED
SURFACE FRONT DOES NOT LOOK TOO OMINOUS AT THIS POINT, BUT IT MAY
STALL NEAR OUR AREA AND BRING WITH IT, AT LEAST, A CHANCE OF
SHOWERS ACROSS THE NORTH.
&&
.AVIATION...
GENERALLY VFR CONDITIONS ARE PREVALENT THIS AFTERNOON, EXCEPT FOR
SOME SCATTERED MVFR CIGS, WHERE SOME LOW CLOUDS ARE LINGERING. A
WEAK LOW WILL EFFECT MAINLY SOUTHERN PORTIONS OF THE REGION THIS
EVENING AND OVERNIGHT, BRINGING MORE WIDESPREAD MVFR CIGS (IN THE
2000 FT TO 3000 FT RANGE) AND SOME RENEWED PRECIP CHANCES. NELY
WINDS WILL CONTINUE THROUGH THE DAY ON THURSDAY.
&&
.MARINE...
SCA WILL CONTINUE ON THE OCEAN DUE TO NELY SWELLS AROUND THE SLOW TO
DEPART AREA OF LOW PRESSURE. SEAS ARE STILL RUNNING OVER 7 FT AT
BUOY 44009, AND WINDS HAVE DECREASED SOMEWHAT, ALTHOUGH THEY STILL
HAVE GUSTS AROUND 20 KT. A WEAK 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.
&&
.TIDES...
TIDAL ANOMALIES ARE STILL RUNNING AT ABOVE NORMAL ALONG THE NEW
JERSEY SHORE. MANY LOCATIONS ARE STILL 1.5 TO 2.5 FT ABOVE MLLW.
PERSISTENT NE WINDS AND THE HIGH ASTRONOMICAL TIDES MAY CONTINUE
TO CAUSE SOME TIDAL FLOODING PROBLEMS OVER THE NEXT COUPLE OF
DAYS. AS A RESULT, WILL ISSUE A COASTAL FLOOD WARNING FOR THE
COAST, INCLUDING THE DEL BEACHES THROUGH MIDNIGHT UNTIL THINGS
SETTLE DOWN. IT LOOKS AS IF THURSDAY MORNINGS TIDES ARE LOWER
THAN THIS EVENINGS, SO FOR NOW WILL LET STATEMENT EXPIRE AT
MIDNIGHT.
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...NONE.
NJ...COASTAL FLOOD WARNING UNTIL 1 AM EDT THURSDAY FOR NJZ012>014-
020-022>027.
DE...COASTAL FLOOD WARNING UNTIL 1 AM EDT THURSDAY FOR DEZ003-004.
MD...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL MIDNIGHT EDT THURSDAY NIGHT FOR
ANZ450>455.
&&
SYNOPSIS/SHORT TERM...MEOLA
LONG TERM...DELISI
AVIATION/MARINE/TIDES...LNHazardous weather outlook, Apr 18, 4:10 AM EST, 13 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
2 astronomical low tide. Local standard time, as filed.
Astronomical Low Tide, Inland Sussex
- When
- April 18, 6:00 PM EST to 10:00 PM EST
- Where
- Inland Sussex forecast zone
- Reported by
- C-MAN Station
- Coordinates
- 38.683, -75.339 (the zone’s center; the record gives no point)
What these are
- Astronomical Low Tide
- Unusually low water from tides and offshore wind that caused impacts.
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
- Coastal Flood in New Jersey, April 18 to 21, 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
- 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 Delaware in 2007Every state in 2007This day in weather historyWarnings in Delaware, 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 2026-09-24. Each event’s entry at NCEI: 30714, 30715.