Strong southwest winds affected southern half of Delaware from late in the evening on the 11th into the early morning of the 12th. Peak wind gusts averaged around 45 mph.
Every event with a place to put it; 3 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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.
The episode as NWS PHI wrote it up.
Strong southwest winds affected southern half of Delaware from late in the evening on the 11th into the early morning of the 12th. Peak wind gusts averaged around 45 mph. Some damaging wind gusts also occurred as a line of showers moved through the southern half of the state.
The strong southwest winds were caused by an intensifying low pressure system that developed along the Gulf Coast States on the 10th. This low pressure system moved northeast from Alabama on the morning of the 11th, to central North Carolina early in the evening on the 11th to near Bridgeport, Connecticut at 7 a.m. EST on the 12th. The strongest winds occurred when the region was in the warm sector of the low pressure system. Stronger winds aloft were able to mix down more efficiently to the surface. The strong winds ended after the cold front moved through the area early on the 12th.
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 Dec 11, 7:40 PM EST, 2 hours 20 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
740 PM EST THU DEC 11 2008
.SYNOPSIS...
AN AREA OF LOW PRESSURE IN THE SOUTHEASTERN UNITED STATES WILL TRACK
NORTHEASTWARD TONIGHT AND MOVE ACROSS OUR REGION AROUND DAYBREAK
FRIDAY. THIS STORM WILL THEN MOVE AWAY FROM OUR AREA DURING THE
DAY FRIDAY. HIGH PRESSURE THEN GRADUALLY BUILDS TOWARD OUR AREA
FRIDAY NIGHT, THEN SETTLES IN FOR SATURDAY INTO SUNDAY. THIS HIGH
THEN SLIDES TO OUR EAST SUNDAY AS A STORM SYSTEM MOVES THROUGH THE
GREAT LAKES REGION. THIS STORM WILL DRIVE A POTENTIALLY STRONG
COLD FRONT ACROSS OUR AREA ON TUESDAY. THIS FRONT MAY THEN STALL
TO OUR SOUTH AS HIGH PRESSURE SLIDES TO OUR NORTH. A COUPLE AREAS
OF LOW PRESSURE MAY THEN TRAVEL ALONG THIS FRONT.
&&
.NEAR TERM /UNTIL 6 AM FRIDAY MORNING/...
A VERY DYNAMIC STORM SYSTEM ACROSS THE DEEP SOUTH TODAY AS HEAVY
SNOW FELL AS FAR SOUTH AS SOUTHERN LOUISIANA /EVEN THUNDERSNOW
REPORTED THIS MORNING IN SOME AREAS THERE/. THE WATER VAPOR IMAGERY
SHOWS THIS IMPRESSIVE STORM WITH A WELL DEFINED DEFORMATION ZONE ON
ITS WESTERN FLANK, WHILE A MIDLEVEL DRY SLOT PUNCHES UP ACROSS THE
SOUTHEASTERN UNITED STATES. A SURFACE ANALYSIS THIS AFTERNOON
PLACED LOW PRESSURE SOUTHWESTERN NORTH CAROLINA. A FRONTAL BOUNDARY
EXTENDED FROM THIS LOW NORTHEASTWARD INTO SOUTHEASTERN VIRGINIA
THEN WELL EAST OF THE NEW JERSEY COAST. MEANWHILE, HIGH PRESSURE
WAS JUST NORTH OF MAINE, WITH ANOTHER LOW PRESSURE SYSTEM JUST
NORTHEAST OF LAKE SUPERIOR. THE MAIN WEATHER PLAYER IS THE STORM IN
THE SOUTH AS IT MOVES UP THE COAST AND BRINGS AN ABUNDANCE OF
MOISTURE ACROSS OUR ENTIRE AREA.
THE MODEL GUIDANCE IS IN GOOD AGREEMENT REGARDING THIS SYSTEM. THE
GFS CONTINUES WITH ITS PREVIOUS RUNS WITH SHOWING VERY LITTLE CHANGE
AS THE MIDLEVEL PHASING EVOLVES INTO A LARGE SCALE UPPER-LEVEL
TROUGH IN THE EAST. THE NAM INITIATED WELL, HOWEVER IT INCORRECTLY
PLACED THE LOW-LEVEL AND UPPER-LEVEL JET FEATURES. THIS WOULD
PROBABLY HAVE AN IMPACT IN ITS THERMAL PROFILES. WE GENERALLY
LEANED TOWARD A GFS/ECMWF COMPROMISE. THE SURFACE LOW WILL SLIDE
NORTHEASTWARD TRACK ACROSS OUR FAR EASTERN COUNTIES LATE TONIGHT
AND EARLY FRIDAY MORNING. A SIGNIFICANT LOW-LEVEL JET ON THE ORDER
OF 60 KNOTS WILL TRACK ACROSS OUR AREA AS IMPRESSIVE HEIGHT FALLS
HAVE OCCURRED ACROSS PORTIONS OF THE SOUTHEASTERN UNITED STATES.
THIS LOW-LEVEL JET COUPLED WITH UPPER-LEVEL JET DYNAMICS WILL
CONTINUE TO PRODUCE STRONG FRONTOGENETIC FORCING ACROSS OUR AREA
TONIGHT. THE CLOSED MIDLEVEL FEATURE IS FORECAST TO WEAKEN AS IT
MOVES UP THE EAST COAST AS THE ASSOCIATED SURFACE LOW RACES ACROSS
THE ENTIRE REGION. PW VALUES ON THE ORDER OF 1.0 TO 1.5 INCHES
WILL CONTINUE TO SURGE ACROSS A GOOD PART OF THE AREA, LEADING TO
THE RAIN BEING HEAVY AT TIMES /SEE THE HYDROLOGY SECTION BELOW FOR
MORE DETAILS/. WITH MOST OF OUR REGION NORTH OF A WARM/STATIONARY
FRONT, WARMER MOIST AIR WILL BE LIFTED OVER THIS BOUNDARY. THIS
ALLOWED FOR JUST ENOUGH ELEVATED INSTABILITY ACROSS PARTS OF THE
DELMARVA THIS AFTERNOON WITH SOME CLOUD TO GROUND LIGHTNING
STRIKES DETECTED. THE FORECAST SOUNDINGS INDICATE THAT THIS
AVAILABLE INSTABILITY GETS MOSTLY SHUNTED TO OUR EAST THIS
EVENING, HOWEVER THERE IS SOME CONCERN OUR FAR SOUTHERN ZONES GET
INTO THE WARM SECTOR FOR A TIME. FOR NOW, WE INCLUDED ISOLATED
THUNDER IN THE FAR SOUTH INTO THIS EVENING.
THE MAIN FORECAST CHALLENGE WITH THIS STORM IS THE FREEZING/FROZEN
PRECIPITATION. SURFACE OBSERVATIONS INCLUDING MESONET SITES INDICATE
THAT SOME PARTS OF THE HIGHER TERRAIN ACROSS THE FAR NORTHWESTERN
COUNTIES ARE RIGHT AROUND FREEZING. WE HAD AN EARLIER REPORT OF
ONE-QUARTER INCH OF ICE ACCUMULATION IN TOBYHANNA /MONROE COUNTY,
PENNSYLVANIA/ AT AN ELEVATION OF 2100 FEET. THE SPOTTER REPORTED
THAT ICE WAS MAINLY ON SUSPENDED SURFACES WITH THE ROADS JUST WET.
ANOTHER REPORT OF A QUARTER-INCH OF ICE WAS RECEIVED FROM WANTAGE
/SUSSEX COUNTY, NEW JERSEY/ WITH ROADS JUST WET. WE EXAMINED A HOST
OF FORECAST SOUNDINGS AND THE PRECIPITATION TYPE FOR AWHILE IS
MAINLY FREEZING RAIN ACROSS THE HIGHER TERRAIN WITH PERHAPS SOME
SLEET, AND A COLD PLAIN RAIN IN THE VALLEYS. AS THE STORM SLIDES
ACROSS OUR AREA, COLDER AIR SITTING TO OUR WEST WILL GET DRAWN
EASTWARD. THE MAIN QUESTIONS ARE HOW QUICK DOES THE COLDER AIR
ARRIVE AND HOW DEEP DOES THE COLD AIR BECOME? THE FORECAST SOUNDINGS
SEEM TO BE IN GENERAL GOOD CONSENSUS IN KEEPING THE COLDER AIR
RATHER SHALLOW FOR AWHILE TONIGHT AS A STRONG LOW-LEVEL JET
BLASTS UP FROM THE SOUTH. AS A RESULT FREEZING RAIN AND RAIN IN
THE WARNING AREA SHOULD GRADUALLY TRANSITION TO SOME SLEET AND
SNOW AND THEN ALL SNOW LATE. WE WILL CONTINUE TO ADVERTISE AROUND
A HALF AN INCH OF ICE ACCUMULATION IN THE WARNING AREA, HOWEVER
SOME OF THE HIGHER TERRAIN MAY GET MORE THAN THAT. OUR CONCERN
FOR THE OVERNIGHT THOUGH IS THAT THE FRONTOGENETIC FORCING IS
STRONG ENOUGH TO ACT UPON A DEVELOPING ISOTHERMAL LAYER IN THE
LOWER-LEVELS. THIS COULD CHANGE THE FREEZING RAIN/RAIN TO SLEET
OR A SNOW/SLEET MIX, DEPENDING ON PRECIPITATION INTENSITY. GIVEN
THIS, WE BEGAN TO TRANSITION THE PRECIPITATION TO MORE SNOW WELL
AFTER MIDNIGHT AND TOWARD DAYBREAK FRIDAY FROM NORTHWEST TO
SOUTHEAST.
WE DID NOT CHANGE THE WINTER STORM WARNING AREA, HOWEVER WE EXTENDED
IT UNTIL 15Z FRIDAY AS THE ENDING TIME OF THE MAIN PRECIPITATION
LOOKS TO HOLD ON LONGER. TEMPERATURES TONIGHT IN MANY AREAS MAY
HOLD STEADY OR SLOWLY FALL. WE GENERALLY USED A BLEND OF
CONTINUITY AND MAV GUIDANCE.
&&
.SHORT TERM /6 AM FRIDAY MORNING THROUGH SATURDAY NIGHT/...
THE STORM SYSTEM WILL BE SLIDING ACROSS AND NORTHEAST OF OUR REGION
FRIDAY MORNING. AS THIS OCCURS, CAA KICKS IN ALLOWING THE ENTIRE
ATMOSPHERIC PROFILE TO COOL. DESPITE THE MIDLEVEL LOW WEAKENING
WITH TIME, SOME OF THE MODELS ARE INDICATING A DEFORMATION TYPE
ZONE TRAILING ON THE BACKSIDE OF THE STORM SYSTEM. THE TIMING OF
THIS FEATURE MAY BE MOVING ACROSS DURING THE MORNING COMMUTE.
FORECAST SOUNDINGS INDICATE THE COLD AIR COMING IN FAIRLY QUICKLY
ACROSS THE WESTERN PART OF THE CWA EARLY FRIDAY MORNING. WE
THEREFORE MAINTAINED THE TRANSITION TO MORE SNOW EARLY AND SLID
THIS EASTWARD WITH TIME. WE TOYED AROUND WITH THE IDEA OF ISSUING
A WINTER WEATHER ADVISORY FOR BERKS COUNTY, THE LEHIGH VALLEY AND
PORTIONS OF NORTHERN NEW JERSEY FOR THE POTENTIAL OF SOME
ACCUMULATING SNOW FRIDAY MORNING. THE AMOUNTS ARE BELOW ADVISORY
CRITERIA AND OUR CONFIDENCE IS LOW ON THE EXACT CHANGEOVER TIMING AS
WELL AS JUST HOW MUCH WILL ACCUMULATE AS MANY LOCALES MAY STILL BE
ABOVE FREEZING. THIS COULD HAVE AN IMPACT ON THE MORNING COMMUTE
THOUGH SO THIS WILL HAVE TO BE MONITORED CLOSELY. FOR NOW, WE OPTED
TO HOLD OFF ON AN ADVISORY AND ALLOW THE FORECAST TO SPEAK FOR ITSELF
/MENTIONING ABOUT AN INCH OF SNOW/. WE WILL ALSO MENTION IN THE
HAZARDOUS WEATHER OUTLOOK /HWO/.
AS THE STORM SYSTEM MOVES AWAY ON FRIDAY, THE MAIN UPPER TROUGH AXIS
WILL BE TO OUR WEST. WHILE THERE IS FAIRLY DECENT DRYING IN THE MID
TO UPPER LEVELS, THE LOWER LEVELS LOOK TO REMAIN RATHER MOIST WITHIN
A CAA REGIME FOR AWHILE. AS A RESULT, WE WILL HOLD ONTO THE CLOUDS
BUT GRADUALLY THIN THEM OUT DURING THE AFTERNOON AS THE FLOW WILL BE
DOWNSLOPING. TEMPERATURES ON FRIDAY LOOK TO REMAIN NEARLY STEADY OR
EVEN FALL A BIT ACROSS THE BULK OF THE REGION GIVEN THE CAA. AS A
RESULT, WE ADJUSTED THE HOURLY GRIDS TO REFLECT MORE OF A NON-DIURNAL
CURVE.
HIGH PRESSURE THEN APPROACHES OUR AREA FRIDAY NIGHT, HOWEVER A SHORT
WAVE WILL CROSS THE REGION IN ASSOCIATION WITH THE UPPER-LEVEL
TROUGH AXIS. WHILE THIS COULD PRODUCE A FEW SNOW SHOWERS OR
FLURRIES, THE AIR MASS MAY BE A BIT TO DRY, THEREFORE WE LEFT THIS
OUT FOR NOW. MUCH COLDER AIR WILL SETTLE IN FRIDAY NIGHT WITH A
DIMINISHING WIND AS THE PRESSURE GRADIENT RELAXES.
&&
.LONG TERM /SUNDAY THROUGH THURSDAY/...
THIS TIME FRAME IS ANTICIPATED TO START ON THE QUIET SIDE, THEN OUR
WEATHER TURNS MORE ACTIVE WITH THE TEMPERATURE ROLLER COASTER RIDE
LOOKING TO CONTINUE. THE MODEL CONSENSUS IS FOR AN UPPER-LEVEL RIDGE
TO BE OVER THE EAST SUNDAY, WITH A STRONG SURFACE HIGH IN CONTROL.
AS ENERGY DIVES INTO THE WESTERN UNITED STATES UPPER-LEVEL TROUGH
THOUGH, THE RIDGE IN THE EAST WILL EVENTUALLY BE KNOCKED DOWN. HPC
USED THE ECMWF AS A GUIDE THROUGH TUESDAY, WITH A PROGRESSIVE BLEND
TOWARD THE ECMWF ENSEMBLE MEAN THEREAFTER TO ADDRESS THE
UNCERTAINTIES IN THE SYNOPTIC DETAILS AT THIS TIME RANGE. HPC
MENTIONED THAT THE ECMWF AND ITS MEAN CLUSTER STRONGLY AGREE WITH
BOTH THE GEM GLOBAL MEAN AND THE DETERMINISTIC UKMET INTO WEDNESDAY.
THIS INDICATES A MEAN TROUGH OVER THE WESTERN STATES AND A FLAT
SUBTROPICAL RIDGE OVER THE SOUTHEASTERN UNITED STATES. THE LAST
SEVERAL RUNS OF THE GFS AND GFS ENSEMBLE MEAN HAVE SHOWN MORE OF A
SPLIT OVER WESTERN NORTH AMERICA AND THE EASTERN PACIFIC FROM
ABOUT MID PERIOD ONWARD /SETTLING THE MAIN POLAR LOBE INTO
CALIFORNIA/.
GIVEN THE ABOVE, A STRONG AREA OF HIGH PRESSURE IS FORECAST TO BE
SLIDING OFF THE MID ATLANTIC COAST ON SUNDAY. AS THIS OCCURS, A DEEP
SOUTHWESTERLY FLOW WILL OCCUR AS A STRONG COLD FRONT MARCHES THROUGH
THE GREAT LAKES AND OHIO/TENNESSEE VALLEYS ON MONDAY. THE MODEL
CONSENSUS INDICATES THAT THE MAIN UPPER-LEVEL TROUGH REMAINS WELL
TO OUR WEST, WITH THE EAST WITHIN A SOUTHWESTERLY FLOW ALOFT. THIS
MAY ALLOW THE ENERGY ASSOCIATED WITH THE FRONT TO SHEAR OUT AS IT
LIFTS INTO THE NORTHEAST. WE MAY HAVE TO WATCH IN CASE THE SURFACE
FRONT THAT MOVES THROUGH OUR AREA ON TUESDAY DECIDES TO STALL TO
OUR SOUTH TUESDAY NIGHT AND WEDNESDAY. GIVEN THE ADVERTISED
SOUTHWESTERLY FLOW ALOFT, RIPPLES OF ENERGY MAY TEND TO TRAVEL
ALONG THIS BOUNDARY WEDNESDAY AND THURSDAY. DEPENDING ON THE EXACT
SYNOPTIC SETUP, SOME PRECIPITATION MAY BE THROWN INTO OUR AREA
FROM THE SOUTHERN ENERGY, ESPECIALLY ACROSS OUR SOUTHERN ZONES.
FOR NOW, WE CARRIED CHC POPS FOR THE CWA. PRECIPITATION TYPE COULD
BE IN QUESTION, HOWEVER FOR NOW WE CARRIED A GENERIC RAIN/SNOW AS
UNCERTAINTY COMES INTO PLAY.
THAT IS ALL FOR NOW. THANKS TO THE SURROUNDING OFFICES, MARFC AND
HPC FOR THE COLLABORATION TODAY. HAVE A GOOD ONE
&&
.AVIATION /01Z FRIDAY THROUGH TUESDAY/...
AT 0030Z, CONDITIONS WERE VARYING FROM IFR TO MVFR AT OUR TAF SITES
AS ADDITIONAL HEAVY RAIN WAS BUILDING UP INTO OUR REGION. NOT MUCH
CHANGE IS ANTICIPATED FOR THE OVERNIGHT, WITH CONDITIONS EXPECTED TO
FAVOR IFR. THE WIND WILL BE MAINLY FROM THE NORTHEAST. HOWEVER, AS
LOW PRESSURE FROM THE SOUTH PASSES OVER SOUTHERN NEW JERSEY LATE
TONIGHT, THE WIND MAY BECOME SOUTHEAST OR SOUTH AT KMIV AND KACY FOR
A BRIEF TIME. WITH A STRONG LOW LEVEL JET MOVING UP THE COAST
TONIGHT, WE HAVE CONTINUED TO MENTION LOW LEVEL WIND SHEAR AT KMIV
AND KACY.
LOW LEVEL MOISTURE IS EXPECTED TO LINGER INTO FRIDAY MORNING.
COLDER AIR SHOULD BEGIN TO BUILD DOWN FROM THE NORTH AND NORTHWEST,
POSSIBLY CAUSING THE RAIN TO CHANGE TO SLEET AND SNOW BEFORE ENDING
AT KRDG AND KABE ON FRIDAY MORNING. SOME SNOW FLAKES ARE ALSO
POSSIBLE AT KTTN, KPNE AND KPHL AT THAT TIME.
DRYER AIR WILL PUSH INTO OUR REGION ON A GUSTY NORTHWEST WIND ON
FRIDAY. CONDITIONS SHOULD IMPROVE INTO THE VFR CATEGORY AT ALL
EIGHT OF OUR TAF SITES BY LATE MORNING.
OUTLOOK...
HIGH PRESSURE IS EXPECTED TO INFLUENCE OUR REGION FROM FRIDAY NIGHT
INTO MONDAY. A COLD FRONT FROM THE NORTHWEST MAY BRING SOME RAIN
SHOWERS ON TUESDAY.
&&
.MARINE...
THE SMALL CRAFT ADVISORY /SCA/ HAS BEEN EXTENDED THROUGH FRIDAY
NIGHT FOR THE OCEAN AND INTO FRIDAY EVENING FOR DELAWARE BAY. ON THE
OCEAN SIDE WE ARE EXPECTING ANOTHER RAIN INDUCED PCPN INVERSION TO
PREVENT MUCH STRONGER WINDS ALOFT FROM REACHING THE OCEAN. THERE IS
A SMALL WINDOW TOWARD MIDNIGHT TONIGHT THAT OUR SOUTHERN OCEANIC
COASTAL WATERS WOULD BE VULNERABLE TO GALE FORCE GUSTS. AS THE LOW
PRESSURE SYSTEM ITSELF MOVES OVER OUR AREA WATERS TONIGHT, WINDS
SHOULD DROP BELOW SCA CRITERIA BEFORE THEY RAMP UP AGAIN TOWARD
MORNING. SEAS WILL REMAIN IN SCA CRITERIA EVEN IF WINDS DO NOT ON
DELAWARE BAY THE WIND GAP IS TOO SMALL TO DROP AND THEN RE-HOIST A
SCA.
GUSTY NW WINDS AROUND THE DEEPENING LOW SHOULD OCCUR ON FRIDAY AND
INTO FRIDAY NIGHT OVER THE OCEAN. WE WILL EXTEND THE SCA OVER THE
OCEAN BECAUSE OF THIS. THE SCA ON DELAWARE BAY HAS ALSO BEEN
EXTENDED INTO FRIDAY EVENING AS PER REASONING ABOVE. GRADIENT SHOULD
DIMINISH ON THE BAY FIRST REASONING FOR GOING THROUGH THE EVENING
ONLY ATTM.
AFTER THAT THERE COULD VERY WELL BE A THREE DAY PERIOD IN WHICH SCA
WILL NOT BE NECESSARY AS HIGH PRESSURE BUILDS INTO AND OVER OUR
MARINE AREA. THE NEXT CHANCE FOR SCA CONDITIONS SHOULD OCCUR MONDAY
NIGHT INTO TUESDAY IN THE SOUTHERLY GRADIENT PRECEDING THE NEXT COLD
FRONT. THIS MIGHT BE MORE OF A SWELL INDUCED SCA VS WIND AND SEAS.
WE WILL SEE WHAT THE MODELS BRING WITH THIS OVER THE NEXT COUPLE OF
DAYS.
&&
.HYDROLOGY...
PLENTY OF MOISTURE SURGING ACROSS THE REGION WILL RESULT IN A WEALTH
OR LIQUID QPF ACROSS THE ENTIRE AREA TONIGHT INTO FRIDAY MORNING.
WE CONTINUED THE FLOOD WATCH WITH NO CHANGES ATTM. WE ARE GOING
WITH 2.5 TO 3.5 INCHES OF TOTAL RAINFALL IN THE WATCH AREA. SINCE
THE RAINFALL IS GENERALLY SPREAD OUT OVER TIME, FLASH FLOODING IS
NOT ANTICIPATED TO BE A CONCERN. GIVEN THE AMOUNTS OF RAINFALL
EXPECTED, THE MAIN STEM DELAWARE RIVER AND THE LEHIGH RIVER ARE
EXPECTED TO STAY WELL WITHIN THEIR BANKS. HOWEVER, SOME OF THE
SMALLER RIVERS AND CREEKS IN THE REGION, SUCH AS PERKIOMEN CREEK,
NESHAMINY CREEK, CHESTER CREEK, THE CHRISTINA RIVER, ASSUNPINK
CREEK, RANCOCAS CREEK AND THE MILLSTONE RIVER, MAY EXPERIENCE
MINOR FLOODING. MEANWHILE, THE SCHUYLKILL RIVER, THE RARITAN RIVER
AND THE PASSAIC RIVER MAY EXPERIENCE THREE QUARTERS TO NEAR
BANKFULL CONDITIONS.
IN ADDITION TO MINOR FLOODING ALONG SOME OF THE SMALLER RIVERS
AND CREEKS IN THE REGION, THERE WILL LIKELY BE FLOODING ON SOME
ROADWAYS AND IN AREAS OF POOR DRAINAGE, ESPECIALLY DURING TIMES OF
HEAVIER RAIN.
&&
.TIDES/COASTAL FLOODING...
WE HAVE ISSUED A COASTAL FLOOD ADVISORY FOR THE FRIDAY MORNING HIGH
TIDE MAINLY ALONG THE NEW JERSEY OCEANIC SHORE. WE WILL ALSO GO INTO
RARITAN BAY AND INTO DELAWARE BAY AROUND CAPE MAY COUNTY. THE THREAT
FOR MINOR TIDAL FLOODING WILL HAVE MORE TO DO WITH THE EXTREMELY
HIGH ASTRONOMICAL SPRING TIDES THAN WITH THE LOW PRESSURE SYSTEM
ITSELF. IN ONE LOCATION WE NEED LESS THAN HALF A FOOT TIDAL
DEPARTURE TO REACH MINOR TIDAL FLOODING. FORTUNATELY THE GREATEST
ONSHORE FLOW WILL BE DURING THE LOWER OF THE TWO ASTRONOMICAL HIGH
TIDES THIS EVENING AND BY THE TIME OF THE NEXT HIGH TIDE, WINDS
SHOULD BE SHIFTING TO THE NORTHWEST. THIS WIND SHIFT WILL OCCUR
FIRST ALONG CAPE MAY COUNTY AND LAST AROUND MIDDLESEX AND MONMOUTH
COUNTIES WHICH WILL HAVE THE GREATEST CHANCE TO REACH MINOR TIDAL
FLOODING LEVELS. THE HEAVIER RAIN SHOULD BE OVER BY THE TIME THAT
HIGH TIDE OCCURS AND STORM RUN OFF SHOULD NOT EXACERBATE ANY
PROBLEMS. WE DID NOT INCLUDE DELAWARE BAY OR THE DELAWARE RIVER FOR
NOW AS THE HIGH TIDE IS LATER AND THEY WILL HAVE MORE HOURS OF AN
ESTABLISHED OFFSHORE FLOW. THIS SHOULD BE A ONE TIDE CYCLE EVENT.
CONVERSELY THE NW FLOW SHOULD NOT PERSIST LONG ENOUGH TO CAUSE THE
OPPOSITE PROBLEM LATER FRIDAY, BLOW-OUT TIDES.
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...FLOOD WATCH THROUGH LATE TONIGHT FOR PAZ060>062-067>071.
WINTER STORM WARNING UNTIL 10 AM EST FRIDAY FOR PAZ054-055.
NJ...FLOOD WATCH THROUGH LATE TONIGHT FOR NJZ007>010-012-013-
015>023-027.
COASTAL FLOOD ADVISORY FROM 5 AM TO 10 AM EST FRIDAY FOR
NJZ012>014-020-022>027.
WINTER STORM WARNING UNTIL 10 AM EST FRIDAY FOR NJZ001.
DE...FLOOD WATCH THROUGH LATE TONIGHT FOR DEZ001>003.
MD...FLOOD WATCH THROUGH LATE TONIGHT FOR MDZ008-012-015-019-020.
MARINE...SMALL CRAFT ADVISORY UNTIL 6 AM EST SATURDAY FOR ANZ450>455.
SMALL CRAFT ADVISORY UNTIL MIDNIGHT EST FRIDAY NIGHT FOR
ANZ430-431.
&&
SYNOPSIS...GORSE
NEAR TERM...GORSE
SHORT TERM...GORSE
LONG TERM...GORSE
AVIATION...IOVINO
MARINE...GIGI
HYDROLOGY...GORSE/IOVINO
TIDES/COASTAL FLOODING...GIGIHAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 448 PM EST THU DEC 11 2008 NJZ001-PAZ054-055-121200- SUSSEX-CARBON-MONROE- 448 PM EST THU DEC 11 2008 ...WINTER STORM WARNING IN EFFECT UNTIL 10 AM EST FRIDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW JERSEY AND NORTHEAST PENNSYLVANIA. .DAY ONE...TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WINTER STORM WARNING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WINTER STORM WARNING. GUSTY WINDS FRIDAY MAY CAUSE ANY ICE COATED TREE LIMBS TO FALL AND POSSIBLY CREATE SCATTERED POWER OUTAGES. .SPOTTER INFORMATION STATEMENT... SPOTTERS SHOULD REPORT ICE AND SNOW ACCUMULATIONS TO THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY. NJZ007-008-PAZ060>062-121200- WARREN-MORRIS-BERKS-LEHIGH-NORTHAMPTON- 448 PM EST THU DEC 11 2008 ...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW JERSEY AND EAST CENTRAL PENNSYLVANIA. .DAY ONE...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...FRIDAY THROUGH WEDNESDAY. A BURST OF SNOW MAY OCCUR FRIDAY MORNING, POTENTIALLY IMPACTING THE MORNING COMMUTE. SNOW ACCUMULATIONS OF AROUND AN INCH ARE POSSIBLE. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT FLOODING AND SNOW ACCUMULATIONS TO THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY. NJZ009-010-PAZ067>069-121200- HUNTERDON-SOMERSET-CHESTER-MONTGOMERY-BUCKS- 448 PM EST THU DEC 11 2008 ...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW JERSEY...NORTHWEST NEW JERSEY AND SOUTHEAST PENNSYLVANIA. .DAY ONE...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...FRIDAY THROUGH WEDNESDAY. RAIN IS FORECAST TO MIX WITH AND EVEN CHANGE TO A PERIOD OF SNOW BEFORE ENDING FRIDAY MORNING. THIS COULD IMPACT THE MORNING COMMUTE WITH UP TO AN INCH OF SNOW ACCUMULATION POSSIBLE. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT FLOODING AND SNOW ACCUMULATIONS TO THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY. DEZ001-MDZ008-NJZ015>019-PAZ070-071-121200- NEW CASTLE-CECIL-MERCER-SALEM-GLOUCESTER-CAMDEN- NORTHWESTERN BURLINGTON-DELAWARE-PHILADELPHIA- 448 PM EST THU DEC 11 2008 ...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN DELAWARE...NORTHEAST MARYLAND...CENTRAL NEW JERSEY...SOUTHERN NEW JERSEY AND SOUTHEAST PENNSYLVANIA. .DAY ONE...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...FRIDAY THROUGH WEDNESDAY. THE RAIN MAY MIX WITH OR CHANGE TO SOME SNOW FRIDAY MORNING BEFORE ENDING. AT THIS TIME, LITTLE OR NO ACCUMULATION IS EXPECTED HOWEVER THIS MAY BE OCCURRING DURING THE MORNING COMMUTE. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT FLOODING TO THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY. NJZ012-121200- MIDDLESEX- 448 PM EST THU DEC 11 2008 ...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... ...COASTAL FLOOD ADVISORY IN EFFECT FROM 5 AM TO 10 AM EST FRIDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW JERSEY. .DAY ONE...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. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. COASTAL FLOOD ADVISORY. THE RAIN MAY MIX WITH OR CHANGE TO SOME SNOW FRIDAY MORNING BEFORE ENDING. AT THIS TIME, LITTLE OR NO ACCUMULATION IS EXPECTED HOWEVER THIS MAY BE OCCURRING DURING THE MORNING COMMUTE. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT FLOODING TO THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY. DEZ002-003-MDZ012-015-019-020-NJZ021-121200- KENT-INLAND SUSSEX-KENT MD-QUEEN ANNES-TALBOT-CAROLINE-CUMBERLAND- 448 PM EST THU DEC 11 2008 ...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL DELAWARE...SOUTHERN DELAWARE...NORTHEAST MARYLAND AND SOUTHERN NEW JERSEY. .DAY ONE...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...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT FLOODING TO THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY. NJZ014-024>026-121200- EASTERN MONMOUTH-ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC- COASTAL OCEAN- 448 PM EST THU DEC 11 2008 ...COASTAL FLOOD ADVISORY IN EFFECT FROM 5 AM TO 10 AM EST FRIDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW JERSEY AND SOUTHERN NEW JERSEY. .DAY ONE...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. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. COASTAL FLOOD ADVISORY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. NJZ013-020-022-023-027-121200- WESTERN MONMOUTH-OCEAN-ATLANTIC-CAPE MAY-SOUTHEASTERN BURLINGTON- 448 PM EST THU DEC 11 2008 ...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... ...COASTAL FLOOD ADVISORY IN EFFECT FROM 5 AM TO 10 AM EST FRIDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW JERSEY AND SOUTHERN NEW JERSEY. .DAY ONE...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. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. COASTAL FLOOD ADVISORY. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT FLOODING TO THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY. DEZ004-121200- DELAWARE BEACHES- 448 PM EST THU DEC 11 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHERN DELAWARE. .DAY ONE...TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ450>455-121200- 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- 448 PM EST THU DEC 11 2008 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EST SATURDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS. .DAY ONE...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...FRIDAY THROUGH WEDNESDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. SMALL CRAFT ADVISORY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ430-431-121200- DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- 448 PM EST THU DEC 11 2008 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EST FRIDAY NIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR DELAWARE BAY WATERS. .DAY ONE...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...FRIDAY THROUGH WEDNESDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. SMALL CRAFT ADVISORY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
The national radar mosaic for the moment the first event began.
3 strong wind. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Delaware in 2008Every state in 2008This day in weather historyWarnings in Delaware, December 2008
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: 146600, 146601, 146602.