Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 181, NWS Philadelphia/Mount Holly

December 1, 20107 counties in Pennsylvania; Cumberland County, Gloucester County, Salem County, New Jersey; Kent County, New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Dec 1, 2010, 11:35 AM EST for 7 counties in Pennsylvania; Cumberland County, Gloucester County, Salem County, New Jersey; Kent County, New Castle County, Delaware. It was in force for 40 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Dec 1, 2010, 11:35 AM EST (16:35 UTC)
Expired
Dec 1, 2010, 12:15 PM EST
In force
40 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Kent County, DE, New Castle County, DE, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Dover AFB radar (KDOX), 74 km from the middle of the area, began a volume at 16:37 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Dec 1, 11:45 AM ESTTSTM WND DMGN Malvern, PATREE AND WIRE DOWN ALONG THE PAOLI/THORNDALE LINE BETWEEN MLAVERN AND THORNDALE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 10 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 4.6 hours before the alert went out and 174 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Wallops Is Stn, VA at 12:00Z on 2010-12-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 12:00Z on 2010-12-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 279 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1 J/kg
Mixed-layer CIN
-206 J/kg
Mixed-layer LCL
548 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
279 m²/s²
0-3 km storm-relative helicity
346 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

074 
WUUS51 KPHI 011635
SVRPHI
DEC001-003-NJC011-015-033-PAC011-017-029-045-077-091-101-011715-
/O.NEW.KPHI.SV.W.0181.101201T1635Z-101201T1715Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1135 AM EST WED DEC 1 2010

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN KENT COUNTY IN CENTRAL DELAWARE...
  THIS INCLUDES THE CITY OF DOVER...
  EAST CENTRAL BERKS COUNTY IN EASTERN PENNSYLVANIA...
  SOUTHEASTERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
  EASTERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  THIS INCLUDES THE CITY OF WILMINGTON...
  NORTHWESTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
  EASTERN CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF WEST CHESTER...
  DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
  MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
  WESTERN PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
  WESTERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
  WESTERN GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
  SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 1215 PM EST

* AT 1125 AM EST...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE
  OF HEAVY SHOWERS AND POSSIBLE SEVERE THUNDERSTORMS CAPABLE OF
  PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM BECHTELSVILLE TO WOODSIDE...OR
  ALONG A LINE EXTENDING FROM 15 MILES EAST OF READING TO 9 MILES
  SOUTHWEST OF DOVER...AND MOVING EAST-NORTHEASTWARD AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  NEW CASTLE...CAMDEN...WESTTOWN...DOVER   SPEEDWAY...ROYERSFORD...
  RISING SUN...PHOENIXVILLE...PAOLI...EAST GREENVILLE...WOODLAND
  BEACH...CARNEYS POINT...SALEM...PENNS GROVE...TRAPPE...VALLEY
  FORGE...SCHWENKSVILLE...COLLEGEVILLE...LIMA...NEWTOWN SQUARE...
  KING OF PRUSSIA...CHESTER...AND RADNOR TOWNSHIP.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DAMAGING WINDS UP TO 65 MILES AN HOUR IN ELKTON IN CECIL COUNTY 
MARYLAND WERE REPORTED AT 11:10 AM WITH THIS LINE OF STORMS. SEEK 
SAFE SHELTER AND STAY AWAY FROM WINDOWS!

&&

LAT...LON 3902 7568 4046 7568 4052 7537 4058 7522
      3921 7510 3919 7518 3923 7518 3929 7527
      3929 7532 3934 7535 3933 7537 3943 7548
      3946 7555 3950 7557 3957 7553 3958 7556
      3946 7558 3924 7538 3911 7539
TIME...MOT...LOC 1631Z 270DEG 25KT 4038 7560 3906 7557

$$
1 follow-up statement
452 
WWUS51 KPHI 011653
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1153 AM EST WED DEC 1 2010

DEC001-PAC011-011702-
/O.CAN.KPHI.SV.W.0181.000000T0000Z-101201T1715Z/
KENT DE-BERKS PA-
1153 AM EST WED DEC 1 2010

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL BERKS AND
NORTHERN KENT COUNTIES IS CANCELLED...

LAT...LON 3955 7540 4043 7555 4052 7537 4058 7522
      3921 7510 3919 7518 3923 7518 3929 7527
      3929 7532 3934 7535 3934 7538
TIME...MOT...LOC 1652Z 270DEG 25KT 4038 7541 3934 7532

$$

DEC003-NJC011-015-033-PAC017-029-045-077-091-101-011715-
/O.CON.KPHI.SV.W.0181.000000T0000Z-101201T1715Z/
SALEM NJ-CUMBERLAND NJ-GLOUCESTER NJ-DELAWARE PA-PHILADELPHIA PA-
CHESTER PA-MONTGOMERY PA-LEHIGH PA-BUCKS PA-NEW CASTLE DE-
1153 AM EST WED DEC 1 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM EST
FOR EXTREME NORTHEASTERN NEW CASTLE...NORTHWESTERN BUCKS...
SOUTHEASTERN LEHIGH...MONTGOMERY...EXTREME EAST CENTRAL CHESTER...
WESTERN PHILADELPHIA...DELAWARE...WESTERN GLOUCESTER...WESTERN
CUMBERLAND AND CENTRAL SALEM COUNTIES...

AT 1148 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE 
EXTENDING FROM RED HILL TO GREENWICH...OR ALONG A LINE EXTENDING FROM
15 MILES SOUTH OF ALLENTOWN TO 16 MILES NORTHEAST OF DOVER...MOVING 
EAST AT 30 MPH.

LAT...LON 3955 7540 4043 7555 4052 7537 4058 7522
      3921 7510 3919 7518 3923 7518 3929 7527
      3929 7532 3934 7535 3934 7538
TIME...MOT...LOC 1652Z 270DEG 25KT 4038 7541 3934 7532

$$

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Dec 1, 5:36 AM EST, 5 hours 59 minutes earlier.

Area forecast discussion, Dec 1, 5:36 AM EST, 5 hours 59 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
536 AM EST WED DEC 1 2010

.SYNOPSIS...
A STRONG COLD FRONT WILL CROSS MOVE ACROSS THE REGION FROM WEST TO
EAST TODAY. THIS FRONT WILL BRING WET AND WINDY CONDITIONS TO THE
AREA. BEHIND THE FRONT, MUCH COLDER CONDITIONS ARE IN STORE FOR THE
REMAINDER OF THE WEEK AS HIGH PRESSURE BUILDS TO THE WEST. AN AREA
OF LOW PRESSURE WILL THEN MOVE TOWARD NEW ENGLAND AND SPIN IN
PLACE FOR THE WEEKEND INTO EARLY NEXT WEEK KEEPING A COLD, BUT DRY
NORTHWEST FLOW IN PLACE.

&&

.NEAR TERM /THROUGH TONIGHT/...
AN AREA OF SHOWERS MOVED ACRS A GOOD CHUNK OF THE AREA OVERNIGHT
AND THERE WILL BE SOME MORE SCATTERED SHOWERS BEFORE THE MAIN
EVENT ARRIVES LATER THIS MORNING AND INTO THE AFTERNOON FROM WEST
TO EAST. A STRONG COLD FRONT WAS FORECAST TO CROSS THE REGION
DURING THE DAY AND BRING RAIN AND STRONG WINDS. SOME THUNDER CAN
NOT BE RULED OUT. ANY CONVECTION WOULD ENHANCE BOTH THE HEAVY RAIN
AND STRONG WIND THREAT. LLJ VALUES OVER 50 KTS AHEAD OF THE FRONT
AND VERY GOOD OMEGA WITH IT WILL CONTINUE THE FLOW OF WARM MOIST
AIR AND KEEP THE FRONT ACTIVE AS WELL. DO NOT EXPECT TO SEE MUCH
OF A DIURNAL TREND IN TEMPS AHEAD OF THE FRONT, AS TEMPS WILL
REMAIN VERY MILD FOR THE FIRST OF DECEMBER. HOWEVER, TEMPS WILL
DROP RATHER MARKEDLY ONCE THE FRONT PASSES.

&&

.SHORT TERM /THURSDAY THROUGH FRIDAY/...
THE RAIN SHOULD BE MOSTLY, IF NOT COMPLETELY OVER AT THE START OF
THE PD AS THE CDFNT HAS MOVED WELL OFFSHORE. THE BEST CHCS FOR
RAIN WILL BE IN NRN AND ERN SECTIONS DURG THIS TIME.  WE WILL HAVE
A GUSTY W TO NW WIND. HIGH PRESSURE THEN BUILDS TO THE WEST RATHER
QUICKLY OVERNIGHT TONIGHT AND WILL EXERT INFLUENCE ON THE REGION
THROUGH FRIDAY. A DRY PERIOD IS IN STORE, WITH BELOW NORMAL
TEMPS....A STARK INTRODUCTION TO DECEMBER. GUSTY W WINDS WILL
CONTINUE ON THURSDAY, BEFORE DECREASING ON FRIDAY.

&&

.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
AN H5 TROF WILL BE THE DOMINANT FEATURE OVER THE ERN CONUS THROUGH
THE PD AS A COLD VORTEX ROTATES ACRS NEW ENG. A VERY STRONG AREA
OF HIGH PRESSURE WILL BUILD IN ACRS THE CNTRL CONUS AND PRECLUDE
ANY WX FROM DEVELOPING TO THE W. THEREFORE, IT LOOKS LIKE A GENLY
DRY AND COLD PD, WITH BELOW NRML TEMPS.  OTHERWISE, AS THE UPPER
LOW ROTATES TO OUR NORTH, WE DO GET CLOSER TO THE LOW THE
BEGINNING OF NEXT WEEK. THIS COULD BRING IN SOME WRAP AROUND
MOISTURE IN THE FORM OF CLOUDS. IT COULD ALSO BRING SNOW SHOWERS
OR FLURRIES TO OUR NORTHERN MOUNTAINS MONDAY INTO TUESDAY, BUT
DON'T SEE THAT PRECIPITATION GETTING MUCH FARTHER SOUTH. DAYTIME
HIGHS THROUGH THE PERIOD WILL BE IN THE 30S TO LOWER 40S WITH
OVERNIGHT LOWS IN THE 20S TO LOWER 30S. OVERALL, DID NOT NEED TO
MAKE ANY SIG CHANGES TO THE EXTENDD FCST.

&&

.AVIATION /12Z WEDNESDAY THROUGH SUNDAY/...
THE FOLLOWING DISCUSSION IS FOR KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY AND SURROUNDING AREAS.

CONDITIONS ARE BOUNCING BETWEEN VFR AND MVFR AS RAIN BANDS MOVE
NORTH THROUGH THE REGION EARLY THIS MORNING. THIS MAY REMAIN THE
CASE UNTIL THE STEADIER RAIN ARRIVES FROM THE SOUTHWEST SOMETIME
AFTER 1100 UTC. IN THE MEANTIME...A GENERAL LOWERING OF THE CEILINGS
TO MVFR SHOULD CONTINUE...OCCURRING LAST AT KMIV AND KACY.

LOW LEVEL WIND SHEAR IS OCCURRING...BASED ON THE VAD WIND PROFILES
AT KDIX AND TPHL...WITH 45 KNOT SOUTH SOUTHEAST WINDS AT 2000 FEET.
WITH THE SURFACE COLD FRONT STILL BACK ACROSS WESTERN
PENNSYLVANIA...LOW LEVEL WIND SHEAR WILL REMAIN IN PLACE THROUGH THE
MORNING HOURS. IN FACT...AS THE LOW LEVEL JET INCREASES...WINDS AT
2000 FEET MAY REACH 65 KNOTS CLOSE TO 1200 UTC.

THE RAIN WILL BECOME MORE WIDESPREAD AFTER 1100 UTC FROM WEST TO
EAST...AND CONDITIONS WILL DROP TO IFR IN ALL LOCATIONS. BETWEEN
1100 AND 1500 UTC...SOUTH SOUTHEAST WINDS COULD GUST TO 35 KNOTS AT
TIMES...JUST AHEAD OF THE COLD FRONT. THERE MAY ALSO BE
CONVECTION...BUT THIS IS LESS CERTAIN. IT IS POSSIBLE THAT A LINE OF
LOW TOPPED (LESS THAN 20000 FEET) LIMITED LIGHTNING STORMS DEVELOPS
SOUTH OF THE AREA AND SPREADS NORTH FROM KPHL EASTWARD AFTER 1200
UTC. HOWEVER...THIS IS A LOW CHANCE AND FOR NOW THUNDER IS NOT IN
THE FORECAST.

WITH THE FRONTAL PASSAGE...CEILINGS WILL INCREASE TO MVFR...AS
MOISTURE GETS TRAPPED UNDER THE INVERSION. IN ADDITION...WIND GUSTS
TO 35 KNOTS FROM THE SOUTH AHEAD OF THE FRONT...AND WEST TO
NORTHWEST BEHIND IT...ARE POSSIBLE. CONDITIONS SHOULD IMPROVE TO VFR
BETWEEN 1 AND 4 HOURS AFTER THE FRONTAL PASSAGE. BASED ON HOW SLOWLY
THE FRONT IS MOVING NOW...THE FRONT IS EXPECTED TO CROSS KRDG AND
KABE ABOUT 1600 UTC...THE PHILADELPHIA METRO AREA AROUND 1800
UTC...AND AS LATE AS 2000 UTC IN KACY.

FOR TONIGHT...WEST TO NORTHWEST WINDS COULD GUST TO 25 KNOTS INTO
THE EVENING HOURS. A RAPID TRANSITION TO VFR CONDITIONS AND THEN
CLEAR SKIES CAN BE EXPECTED DURING THE EARLY EVENING HOURS.

OUTLOOK...
VFR CONDITIONS ARE EXPECTED FOR THURSDAY INTO THE EARLY PART OF THE
WEEKEND. WINDS MAY GUST TO 25 KNOTS FROM TIME TO TIME...ESPECIALLY
THURSDAY AND AGAIN SATURDAY.

&&

.MARINE...
WINDS HAVE REACHED SMALL CRAFT LEVELS ON ALL WATERS EARLY THIS
MORNING IN THE SOUTH SOUTHEAST FLOW...AND ON THE OCEAN WATERS SEAS
HAVE RISEN ABOVE 5 FEET. THE BEST GRADIENT AHEAD OF THE COLD FRONT
AND SURFACE LOW IS APPROACHING THE WATERS...AND SHOULD REMAIN OVER
THE WATERS UNTIL JUST AHEAD OF THE COLD FRONTAL PASSAGE LATE THIS
MORNING AND EARLY THIS AFTERNOON.

AT THIS POINT...BASED ON UPSTREAM OBSERVATIONS AND VAD WIND PROFILE
DATA...IT WOULD APPEAR AS THOUGH THE BEST CHANCE OF GALE FORCE WINDS
WILL BE NEAR THE COLD FRONTAL ZONE. THE DEPTH OF THE MIXED LAYER
SHOULD ALLOW ACCESS TO 40 TO 50 KNOTS OF WIND...WHICH SHOULD
TRANSLATE TO THE SURFACE AS AT LEAST 35 KNOT GUSTS. THIS SHOULD
CONTINUE THROUGH THE COLD FRONTAL PASSAGE...WHICH WILL OCCUR THIS
AFTERNOON ON THE OCEAN WATERS.

WITH THE PASSAGE OF THE COLD FRONT...THERE WILL BE A BRIEF WEST TO
NORTHWEST MOMENTUM TRANSFER...WHICH COULD BRING WINDS TO GALE FORCE
AN HOUR OR TWO AFTER THE FRONTAL PASSAGE. AFTER THIS...THE GRADIENT
SHOULD BACK OFF ENOUGH TO ALLOW WINDS TO DROP BELOW 30 KNOTS BY LATE
AFTERNOON OR EARLY EVENING.

MODEL SHOW A SECOND SURGE OF COLD AIR ADVECTION THIS EVENING...WHICH
COULD BRING GUSTS BACK TO NEAR 30 KNOTS. HOWEVER...AT THIS POINT...
THE GUSTS APPEAR AS THOUGH THEY WILL STAY BELOW GALE FORCE.

AS THE SURFACE LOW WINDS UP AS IT MOVES TOWARD THE MARITIMES...WINDS
MAY STAY NEAR SMALL CRAFT LEVELS INTO THURSDAY AND PERHAPS EVEN
FRIDAY...ESPECIALLY ON THE COASTAL WATERS. SEAS ON THE OCEAN MAY
STAY UP THAT LONG AS WELL...AS THE SWELL GENERATED TODAY TAKES ITS
TIME GETTING SORTED OUT.

THERE COULD BE ANOTHER SURGE OF SMALL CRAFT WEST TO NORTHWEST
WINDS AS THE GRADIENT BETWEEN DEEPENING LOW PRESSURE OVER THE
MARITIMES AND STRONG HIGH PRESSURE OVER THE MIDWEST TIGHTENS. AT
THIS POINT...IT APPEARS AS THOUGH WINDS SHOULD TOP OUT IN THE SMALL
CRAFT RANGE.

&&

.HYDROLOGY...
THE CWA IS IN THE WARM SECTOR EARLY THIS MORNING AND WARM MOIST
AIR IS IN PLACE. SOME SHOWERS HAVE OCCURRED OVER THE AREA THIS
MORNING, WITH THE HEAVIEST AND STEADIEST RAIN PREDOMINANTLY OVER
THE WATCH AREA. THERE WILL LIKELY BE ANOTHER BREAK FORTHCOMING,
THEN WE WILL GET THE MUCH ADVERTISED COLD FRONT LATER THIS MORNING
THROUGH THE AFTERNOON AS IT MOVES FROM WEST TO EAST. HEAVY RAIN
WILL ACCOMPANY THE FRONT, WHICH COULD BE ENHANCED BY ANY
CONVECTION. OW PRESSURE DEVELOPING ON THE FRONT...WILL ACT TO
FOCUS THE DEEP MOISTURE AND PROVIDE THE THREAT FOR FLOODING FOR A
PORTION. THERE WILL BE NO CHANGES WITH THE FLOOD WATCH AT THIS
TIME. OUR SEVEN WESTERN COUNTIES REMAIN UNDER THE GREATEST THREAT.

RIGHT NOW...BETWEEN 2 AND 3 INCHES OF RAIN IS POSSIBLE IN THE
FLOOD WATCH AREA. WHILE THIS MUCH RAIN IS NOT EXPECTED TO CAUSE
FLOODING ON LARGER RIVERS (WHERE HEADWATER GUIDANCE NUMBERS ARE
FAIRLY HIGH)...FLOODING IS POSSIBLE ON SMALLER RIVERS AND STREAMS.

ALTHOUGH NO FLOODING IS CURRENTLY EXPECTED ON THE LARGER MAINSTEM
RIVERS, WE COULD SEE CAUTION STAGE ON THE DELAWARE AT TRENTON ON
FRIDAY. ALSO LOOKS LIKE CAUTION STAGE WILL BE REACHED ON THE SUSQ
IN HARRISBURG. FOR THIS REASON WELL NEED TO MONITOR WHAT HAPPENS
DOWN AT AND BELOW CONOWINGO AS THE CREST MAKES ITS WAY SOUTH.

&&

.TIDES/COASTAL FLOODING...
THE SOUTH SOUTHEAST FLOW AHEAD OF THE SURFACE COLD FRONT AND
DEVELOPING LOW HAS RESULTED IN TIDE DEPARTURES THIS MORNING RANGING
FROM NEAR ONE FOOT ON THE OCEAN FRONT TO NEAR ONE AND THREE-QUARTERS
FEET ON THE UPPER END OF DELAWARE BAY AT REEDY POINT. SINCE LOW
PRESSURE IS DEVELOPING ON THE FRONT...THE FRONT MAY SLOW ON ITS
APPROACH....ALLOWING THE FLOW OF WATER UP THE DELAWARE AND
CHESAPEAKE BAYS TO CONTINUE LONGER INTO THE MORNING HOURS.

THE COASTAL FLOOD ADVISORIES IN PLACE WILL REMAIN AS THESE LOCATIONS
ARE THE MOST LIKELY TO EXPERIENCE MINOR TIDAL FLOODING. AT THE
CURRENT DEPARTURE...MINOR TIDAL FLOODING WILL OCCUR AT REEDY POINT
LATER THIS MORNING. AT THIS POINT...EVEN WITH THE STRONGER FLOW...
IT APPEARS AS THOUGH THAT LOCATION WILL STAY BELOW THE MODERATE
TIDAL FLOODING BENCHMARK.

A TIDE DEPARTURE OF NEARLY TWO FEET WOULD BE NEEDED TO PRODUCE MINOR
TIDAL FLOODING AT PHILADELPHIA LATER THIS MORNING. THIS TIDE
DEPARTURE HAS BEEN REACHED AS OF 500 AM. WITH THE CONTINUED SOUTH
SOUTHEAST FLOW PRODUCING MORE WATER IN THE DELAWARE BAY AND INTO
THE RIVER...A COASTAL FLOOD ADVISORY HAS BEEN ISSUED FOR THE
A PORTION OF THE DELAWARE RIVER

FOR MOST LOCATIONS...THE NEXT HIGH TIDE CYCLE (AFTER THIS
MORNING) IS THE LOWER OF THE TWO HIGH TIDES. BY THIS TIME...THE
FLOW SHOULD BE OFFSHORE. AT THIS POINT...MINOR TIDAL FLOODING IS
NOT EXPECTING FOR THE EVENING HIGH TIDE CYCLE.

THE CHESAPEAKE BAY OCEAN FORECASTING SYSTEM MODELS SHOW THE
STRONGEST FLOW UP THE BAY THROUGH THE MID MORNING HOURS...WITH THE
STRONGEST SURGE AROUND THE TIME OF HIGH TIDE. BASED ON THE
ABOVE...BOTH CAMBRIDGE AND TOLCHESTER COINCIDENT WITH THE TIME OF
HIGH TIDE.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...WIND ADVISORY UNTIL 4 PM EST THIS AFTERNOON FOR PAZ067>071.
     FLOOD WATCH THROUGH LATE TONIGHT FOR PAZ054-055-060>062.
     WIND ADVISORY UNTIL 2 PM EST THIS AFTERNOON FOR PAZ054-055-
     060>062.
     COASTAL FLOOD ADVISORY UNTIL 11 AM EST THIS MORNING FOR PAZ070-
     071.
NJ...WIND ADVISORY UNTIL 4 PM EST THIS AFTERNOON FOR NJZ008>010-
     012>027.
     COASTAL FLOOD ADVISORY UNTIL 9 AM EST THIS MORNING FOR NJZ016-
     021.
     FLOOD WATCH THROUGH LATE TONIGHT FOR NJZ001-007.
     WIND ADVISORY UNTIL 2 PM EST THIS AFTERNOON FOR NJZ001-007.
     COASTAL FLOOD ADVISORY UNTIL 11 AM EST THIS MORNING FOR
     NJZ017>019.
DE...WIND ADVISORY UNTIL 4 PM EST THIS AFTERNOON FOR DEZ001>004.
     COASTAL FLOOD ADVISORY UNTIL 9 AM EST THIS MORNING FOR DEZ001-
     002.
MD...WIND ADVISORY UNTIL 4 PM EST THIS AFTERNOON FOR MDZ008-012-015-
     019-020.
     COASTAL FLOOD ADVISORY FROM 11 AM THIS MORNING TO 4 PM EST
     THIS AFTERNOON FOR MDZ008-012-015-019.
MARINE...GALE WARNING UNTIL 6 PM EST THIS EVENING FOR ANZ450>455.
     GALE WARNING UNTIL 4 PM EST THIS AFTERNOON FOR ANZ430-431.

&&

SYNOPSIS...NIERENBERG
NEAR TERM...NIERENBERG
SHORT TERM...NIERENBERG
LONG TERM...NIERENBERG
AVIATION...HAYES
MARINE...HAYES
HYDROLOGY...NIERENBERG
TIDES/COASTAL FLOODING...HAYES
Hazardous weather outlook, Dec 1, 11:20 AM EST, 15 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1120 AM EST WED DEC 1 2010

NJZ001-007-PAZ054-055-060>062-021630-
SUSSEX-WARREN-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-
1120 AM EST WED DEC 1 2010

...WIND ADVISORY IN EFFECT UNTIL 2 PM EST THIS AFTERNOON...
...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...

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

DEZ001>004-MDZ020-NJZ008>010-012>027-PAZ067>071-021630-
NEW CASTLE-KENT-INLAND SUSSEX-DELAWARE BEACHES-CAROLINE-MORRIS-
HUNTERDON-SOMERSET-MIDDLESEX-WESTERN MONMOUTH-EASTERN MONMOUTH-
MERCER-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-OCEAN-
CUMBERLAND-ATLANTIC-CAPE MAY-ATLANTIC COASTAL CAPE MAY-
COASTAL ATLANTIC-COASTAL OCEAN-SOUTHEASTERN BURLINGTON-CHESTER-
MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA-
1120 AM EST WED DEC 1 2010

...WIND ADVISORY IN EFFECT UNTIL 4 PM EST THIS AFTERNOON...

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

   WIND 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.

MDZ008-012-015-019-021630-
CECIL-KENT MD-QUEEN ANNES-TALBOT-
1120 AM EST WED DEC 1 2010

...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 4 PM EST THIS AFTERNOON...
...WIND ADVISORY IN EFFECT UNTIL 4 PM EST THIS AFTERNOON...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MARYLAND.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

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

   WIND ADVISORY.
   COASTAL FLOOD 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.

ANZ450>455-021630-
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-
1120 AM EST WED DEC 1 2010

...GALE WARNING IN EFFECT UNTIL 6 PM EST THIS EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

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

   GALE WARNING.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

ANZ430-431-021630-
DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
1120 AM EST WED DEC 1 2010

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

THIS HAZARDOUS WEATHER OUTLOOK IS FOR DELAWARE BAY WATERS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

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

   GALE WARNING.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Dec 1, 7:43 AM EST, 3 hours 52 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
743 AM EST WED DEC 1 2010

DEZ001>004-MDZ008-NJZ007-009-010-012-013-015>024-027-PAZ060>062-
067>071-011330-
ATLANTIC NJ-ATLANTIC COASTAL CAPE MAY NJ-BERKS PA-BUCKS PA-CAMDEN NJ-
CAPE MAY NJ-CECIL MD-CHESTER PA-CUMBERLAND NJ-DELAWARE PA-
DELAWARE BEACHES DE-GLOUCESTER NJ-HUNTERDON NJ-INLAND SUSSEX DE-
KENT DE-LEHIGH PA-MERCER NJ-MIDDLESEX NJ-MONTGOMERY PA-NEW CASTLE DE-
NORTHAMPTON PA-NORTHWESTERN BURLINGTON NJ-OCEAN NJ-PHILADELPHIA PA-
SALEM NJ-SOMERSET NJ-SOUTHEASTERN BURLINGTON NJ-WARREN NJ-
WESTERN MONMOUTH NJ-
743 AM EST WED DEC 1 2010

...HEAVY SHOWERS AND ISOLATED STRONG THUNDERSTORMS WITH GUSTY WINDS
WILL AFFECT ATLANTIC...BERKS...BUCKS...BURLINGTON...CAMDEN...CAPE
MAY...CECIL...CHESTER...CUMBERLAND...DELAWARE...GLOUCESTER...
HUNTERDON...KENT...LEHIGH...MERCER...MIDDLESEX...MONMOUTH...
MONTGOMERY...NEW CASTLE...NORTHAMPTON...OCEAN...PHILADELPHIA...
SALEM...SOMERSET...SUSSEX...AND WARREN COUNTIES...

AT 735 AM EST...NATIONAL WEATHER SERVICE RADAR INDICATED NUMEROUS
HEAVY SHOWERS AND ISOLATED THUNDERSTORMS...SOME IN SHORT LINES...
MOVING THROUGH DELAWARE...SOUTHERN NEW JERSEY...AND EASTERN
PENNSYLVANIA. THESE SHOWERS AND FEW STORMS WILL MOVE INTO CENTRAL
NEW JERSEY THROUGH 8:30 AM.

SOME OF THESE SHOWERS AND ISOLATED STRONG THUNDERSTORMS MAY BRING
STRONG WINDS ABOVE THE SURFACE DOWN TO THE GROUND. WIND GUSTS MAY
REACH 50 MILES AN HOUR AND CAUSE SPOTTY DAMAGE INCLUDING DOWNED
TREES OR TREE LIMBS AND ISOLATED POWER OUTAGES. EXPECT GUSTY WINDS
THIS MORNING...AND A WIND ADVISORY REMAINS IN EFFECT INTO THIS
AFTERNOON.

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

LAT...LON 3848 7567 3913 7572 3931 7561 3932 7574
      4013 7586 4042 7609 4091 7516 4049 7453
      4003 7417 3892 7492 3892 7497 3916 7491
      3917 7514 3958 7556 3907 7539 3880 7507
      3870 7506 3848 7521
Special weather statement, Dec 1, 8:08 AM EST, 3 hours 27 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
808 AM EST WED DEC 1 2010

MDZ008-012-015-019-020-011400-
CAROLINE MD-CECIL MD-KENT MD-QUEEN ANNE'S MD-TALBOT MD-
808 AM EST WED DEC 1 2010

...HEAVY SHOWERS AND ISOLATED STRONG THUNDERSTORMS WILL AFFECT
CAROLINE...CECIL...KENT...QUEEN ANNE'S AND TALBOT COUNTIES...

AT 805 AM EST...NATIONAL WEATHER SERVICE RADAR INDICATED NUMEROUS
HEAVY SHOWERS AND ISOLATED THUNDERSTORMS...SOME IN SHORT LINES...
MOVING THROUGH THE NORTHEAST MARYLAND SHORE. THE ACTIVITY WAS
MOVING TO THE NORTH-NORTHEAST AROUND 45 MILES AN HOUR.

SOME OF THESE SHOWERS AND ISOLATED STRONG THUNDERSTORMS MAY BRING
STRONG WINDS ABOVE THE SURFACE DOWN TO THE GROUND. WIND GUSTS MAY
REACH 50 MILES AN HOUR AND CAUSE SPOTTY DAMAGE INCLUDING DOWNED
TREES OR TREE LIMBS AND ISOLATED POWER OUTAGES. EXPECT GUSTY WINDS
THIS MORNING...AND A WIND ADVISORY REMAINS IN EFFECT INTO THIS
AFTERNOON.

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

LAT...LON 3874 7637 3876 7640 3887 7626 3882 7621
      3883 7620 3894 7624 3890 7624 3893 7628
      3884 7638 3903 7633 3900 7618 3903 7625
      3916 7628 3934 7618 3942 7602 3951 7599
      3970 7623 3971 7582 3866 7573
Special weather statement, Dec 1, 8:36 AM EST, 2 hours 59 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
836 AM EST WED DEC 1 2010

DEZ001>004-MDZ008-012-015-019-020-NJZ001-007>010-012>027-PAZ054-055-
060>062-067>071-011430-
ATLANTIC NJ-ATLANTIC COASTAL CAPE MAY NJ-BERKS PA-BUCKS PA-CAMDEN NJ-
CAPE MAY NJ-CARBON PA-CAROLINE MD-CECIL MD-CHESTER PA-
COASTAL ATLANTIC NJ-COASTAL OCEAN NJ-CUMBERLAND NJ-DELAWARE PA-
DELAWARE BEACHES DE-EASTERN MONMOUTH NJ-GLOUCESTER NJ-HUNTERDON NJ-
INLAND SUSSEX DE-KENT MD-KENT DE-LEHIGH PA-MERCER NJ-MIDDLESEX NJ-
MONROE PA-MONTGOMERY PA-MORRIS NJ-NEW CASTLE DE-NORTHAMPTON PA-
NORTHWESTERN BURLINGTON NJ-OCEAN NJ-PHILADELPHIA PA-QUEEN ANNE'S MD-
SALEM NJ-SOMERSET NJ-SOUTHEASTERN BURLINGTON NJ-SUSSEX NJ-TALBOT MD-
WARREN NJ-WESTERN MONMOUTH NJ-
836 AM EST WED DEC 1 2010

...A STRONG THUNDERSTORM WILL AFFECT ATLANTIC...BERKS...BUCKS...
BURLINGTON...CAMDEN...CAPE MAY...CARBON...CAROLINE...CECIL...
CHESTER...CUMBERLAND...DELAWARE...GLOUCESTER...HUNTERDON...KENT...
LEHIGH...MERCER...MIDDLESEX...MONMOUTH...MONROE...MONTGOMERY...
MORRIS...NEW CASTLE...NORTHAMPTON...OCEAN...PHILADELPHIA...QUEEN
ANNE'S...SALEM...SOMERSET...SUSSEX...TALBOT AND WARREN COUNTIES...

AT 830 AM EST...NATIONAL WEATHER SERVICE RADAR INDICATED NUMEROUS
HEAVY SHOWERS AND ISOLATED THUNDERSTORMS...SOME IN SHORT LINES...
MOVING THROUGH THE AREA. THE ACTIVITY WAS MOVING TO THE NORTH-
NORTHEAST AROUND 45 MILES AN HOUR.

GENERAL WIND GUSTS WERE 30 TO 40 MILES AN HOUR ACROSS THE REGION
THIS MORNING. SOME OF THE SHOWERS AND ISOLATED STRONG THUNDERSTORMS
MAY BRING EVEN STRONGER WINDS ABOVE THE SURFACE DOWN TO THE GROUND.
WIND GUSTS MAY REACH 50 MILES AN HOUR AND CAUSE SPOTTY DAMAGE
INCLUDING DOWNED TREES OR TREE LIMBS AND ISOLATED POWER OUTAGES.
EXPECT GUSTY WINDS THIS MORNING...AND A WIND ADVISORY REMAINS IN
EFFECT INTO THIS AFTERNOON.

STRONGER SHOWERS AND A FEW THUNDERSTORMS WILL BE NEAR VOORHEES AND
MARLTON AROUND 840 AM...MOUNT LAUREL...MEDFORD...AND MEDFORD LAKES
AROUND 845 AM...AND MOUNT HOLLY AND LUMBERTON AROUND 850 AM.

VERY HEAVY RAIN WILL FALL FROM THE SHOWERS AND STORMS ACROSS THE
REGION THIS MORNING...AND WILL CAUSE WATER TO POND ON ROADS AND
QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

LAT...LON 3845 7564 3846 7570 3888 7637 4014 7590
      4050 7644 4074 7578 4111 7576 4126 7514
      4041 7399 4047 7401 4047 7399 4046 7398
      3981 7407 3892 7492 3958 7556 3847 7503
Special weather statement, Dec 1, 9:31 AM EST, 2 hours 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
931 AM EST WED DEC 1 2010

DEZ001>004-MDZ008-012-015-019-020-NJZ001-007>010-012>027-PAZ054-055-
060>062-067>071-011530-
ATLANTIC NJ-ATLANTIC COASTAL CAPE MAY NJ-BERKS PA-BUCKS PA-CAMDEN NJ-
CAPE MAY NJ-CARBON PA-CAROLINE MD-CECIL MD-CHESTER PA-
COASTAL ATLANTIC NJ-COASTAL OCEAN NJ-CUMBERLAND NJ-DELAWARE PA-
DELAWARE BEACHES DE-EASTERN MONMOUTH NJ-GLOUCESTER NJ-HUNTERDON NJ-
INLAND SUSSEX DE-KENT MD-KENT DE-LEHIGH PA-MERCER NJ-MIDDLESEX NJ-
MONROE PA-MONTGOMERY PA-MORRIS NJ-NEW CASTLE DE-NORTHAMPTON PA-
NORTHWESTERN BURLINGTON NJ-OCEAN NJ-PHILADELPHIA PA-QUEEN ANNE'S MD-
SALEM NJ-SOMERSET NJ-SOUTHEASTERN BURLINGTON NJ-SUSSEX NJ-TALBOT MD-
WARREN NJ-WESTERN MONMOUTH NJ-
931 AM EST WED DEC 1 2010

...NUMEROUS HEAVY SHOWERS AND ISOLATED STRONG THUNDERSTORMS WILL
AFFECT ATLANTIC...BERKS...BUCKS...BURLINGTON...CAMDEN...CAPE
MAY...CARBON...CAROLINE...CECIL...CHESTER...CUMBERLAND...DELAWARE...
GLOUCESTER...HUNTERDON...KENT...LEHIGH...MERCER...MIDDLESEX...
MONMOUTH...MONROE...MONTGOMERY...MORRIS...NEW CASTLE...
NORTHAMPTON...OCEAN...PHILADELPHIA...QUEEN ANNE'S...SALEM...
SOMERSET...SUSSEX...TALBOT AND WARREN COUNTIES...

AT 9:30 AM EST...NATIONAL WEATHER SERVICE RADAR INDICATED NUMEROUS
HEAVY SHOWERS AND ISOLATED THUNDERSTORMS MOVING NORTH-NORTHEASTWARD
AROUND 45 MILES AN HOUR THROUGHOUT THE AREA. THIS ACTIVITY WAS
OCCURRING AHEAD OF A COLD FRONT...WHICH WILL MOVE EASTWARD THROUGH
THE REGION FROM LATE THIS MORNING INTO THIS AFTERNOON.

GENERAL WIND GUSTS OF 30 TO 40 MILES AN HOUR WERE OCCURRING ACROSS
THE REGION THIS MORNING. SOME OF THE SHOWERS AND ISOLATED STRONG
THUNDERSTORMS MAY BRING EVEN STRONGER WINDS ABOVE THE SURFACE DOWN
TO THE GROUND. WIND GUSTS MAY REACH 50 MILES AN HOUR AND CAUSE
SPOTTY DAMAGE INCLUDING DOWNED TREES OR TREE LIMBS AND ISOLATED
POWER OUTAGES. THE STRONGEST WINDS MAY OCCUR JUST AHEAD OF AND WITH
THE COLD FRONT OVER WESTERN PORTIONS OF THE AREA LATE THIS
MORNING...AND THEN AS THE FRONT MOVES SLOWLY EASTWARD...OVER EASTERN
SECTIONS EARLY THIS AFTERNOON. BE ALERT FOR ANY SHORT-FUSED WARNINGS
WHICH MAY BE ISSUED. A WIND ADVISORY REMAINS IN EFFECT INTO THIS
AFTERNOON.

VERY HEAVY RAIN WILL FALL FROM THE SHOWERS ACROSS THE REGION THIS
MORNING INTO EARLY AFTERNOON...AND WILL CAUSE WATER TO POND ON ROADS
AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS. A FLOOD WATCH
REMAINS IN EFFECT FOR BERKS COUNTY...THE LEHIGH VALLEY...
NORTHWESTERN NEW JERSEY...AND THE POCONOS INTO TONIGHT.

LAT...LON 3846 7570 3888 7637 4014 7590 4050 7644
      4123 7554 4109 7501 4135 7468 4042 7404
      4042 7403 4047 7399 4046 7398 3982 7407
      3975 7414 3991 7409 3892 7492 3958 7556
      3847 7503 3845 7564
Special weather statement, Dec 1, 10:17 AM EST, 1 hour 18 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1017 AM EST WED DEC 1 2010

DEZ001>003-MDZ008-012-015-019-020-011600-
CAROLINE MD-CECIL MD-INLAND SUSSEX DE-KENT MD-KENT DE-NEW CASTLE DE-
QUEEN ANNE'S MD-TALBOT MD-
1017 AM EST WED DEC 1 2010

...A LINE OF HEAVY SHOWERS AND POSSIBLE STRONG THUNDERSTORMS WILL
AFFECT CAROLINE...CECIL...KENT...NEW CASTLE...QUEEN ANNE'S...SUSSEX
AND TALBOT COUNTIES...

AT 1012 AM EST...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
HEAVY SHOWERS AND ISOLATED STRONG THUNDERSTORMS ALONG A COLD FRONT.
THE FRONT AND LINE EXTENDED FROM 22 MILES SOUTH OF LANCASTER TO 25
MILES SOUTHWEST OF EASTON...MOVING EAST AT 40 MILES AN HOUR. THE
THUNDERSTORMS WILL BE NEAR OCTORARO...NEWTOWN...COPPERVILLE AROUND
1020 AM...WYE MILLS...WEST NOTTINGHAM...OLD TOWN AROUND 1025 AM...
WINDYHILL AND TANYARD AROUND 1030 AM. WINDS GUSTS UP TO AROUND 50
MILES AN HOUR WILL OCCUR WITH THIS LINE...AND MAY CAUSE ISOLATED
DOWNED TREES AND TREE LIMBS AS WELL AS LOCALIZED POWER OUTAGES.

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

LAT...LON 3867 7576 3869 7590 3856 7605 3876 7640
      3887 7626 3882 7620 3883 7620 3894 7624
      3884 7638 3903 7633 3900 7618 3915 7628
      3927 7622 3944 7600 3953 7599 3969 7622
      3969 7621 3967 7563 3849 7548 3846 7571
Special weather statement, Dec 1, 10:49 AM EST, 46 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1049 AM EST WED DEC 1 2010

DEZ001>004-MDZ008-012-015-019-020-NJZ001-007>010-012>027-PAZ054-055-
060>062-067>071-011645-
ATLANTIC NJ-ATLANTIC COASTAL CAPE MAY NJ-BERKS PA-BUCKS PA-CAMDEN NJ-
CAPE MAY NJ-CARBON PA-CAROLINE MD-CECIL MD-CHESTER PA-
COASTAL ATLANTIC NJ-COASTAL OCEAN NJ-CUMBERLAND NJ-DELAWARE PA-
DELAWARE BEACHES DE-EASTERN MONMOUTH NJ-GLOUCESTER NJ-HUNTERDON NJ-
INLAND SUSSEX DE-KENT MD-KENT DE-LEHIGH PA-MERCER NJ-MIDDLESEX NJ-
MONROE PA-MONTGOMERY PA-MORRIS NJ-NEW CASTLE DE-NORTHAMPTON PA-
NORTHWESTERN BURLINGTON NJ-OCEAN NJ-PHILADELPHIA PA-QUEEN ANNE'S MD-
SALEM NJ-SOMERSET NJ-SOUTHEASTERN BURLINGTON NJ-SUSSEX NJ-TALBOT MD-
WARREN NJ-WESTERN MONMOUTH NJ-
1049 AM EST WED DEC 1 2010

...HEAVY SHOWERS AND ISOLATED STRONG THUNDERSTORMS WILL AFFECT
EASTERN PENNSYLVANIA...NORTHEASTERN MARYLAND...DELAWARE...AND
SOUTHERN AND WESTERN NEW JERSEY LATE THIS MORNING...

AT 1040 AM EST...NATIONAL WEATHER SERVICE RADAR INDICATED HEAVY
SHOWERS AND A FEW POSSIBLE STRONG THUNDERSTORMS ALONG A LINE
EXTENDING FROM 19 MILES SOUTHWEST OF WILKES-BARRE PENNSYLVANIA TO 26
MILES SOUTH OF EASTON MARYLAND...MOVING EAST-NORTHEAST AT 40 MILES
AN HOUR.

THIS ACTIVITY WAS SURROUNDING A COLD FRONT WHICH WILL MOVE EASTWARD
THROUGH THE REGION LATE THIS MORNING AND EARLY THIS AFTERNOON.

GENERAL WIND GUSTS OF 30 TO 40 MILES AN HOUR WERE OCCURRING ACROSS
THE REGION THIS MORNING. SOME OF THE SHOWERS AND ISOLATED STRONG
THUNDERSTORMS MAY BRING EVEN STRONGER WINDS ABOVE THE SURFACE DOWN
TO THE GROUND. WIND GUSTS MAY REACH 50 MILES AN HOUR AND CAUSE
SPOTTY DAMAGE INCLUDING DOWNED TREES OR TREE LIMBS AND ISOLATED
POWER OUTAGES. THE STRONGEST WINDS MAY OCCUR JUST AHEAD OF AND WITH
THE COLD FRONT OVER WESTERN PORTIONS OF THE AREA LATE THIS
MORNING...AND THEN AS THE FRONT MOVES SLOWLY EASTWARD...OVER EASTERN
SECTIONS EARLY THIS AFTERNOON. BE ALERT FOR ANY SHORT-FUSED WARNINGS
WHICH MAY BE ISSUED. A WIND ADVISORY REMAINS IN EFFECT INTO THIS
AFTERNOON.

VERY HEAVY RAIN WILL FALL FROM THE SHOWERS ACROSS THE REGION LATE
THIS MORNING INTO EARLY AFTERNOON...AND WILL CAUSE WATER TO POND ON
ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS. A FLOOD
WATCH REMAINS IN EFFECT FOR BERKS COUNTY...THE LEHIGH VALLEY...
NORTHWESTERN NEW JERSEY...AND THE POCONOS INTO TONIGHT.

LAT...LON 3845 7564 3846 7570 3871 7629 4014 7590
      4054 7623 4122 7556 4109 7501 4135 7468
      4097 7427 4059 7444 4041 7399 4047 7399
      4046 7398 4043 7396 3978 7408 3892 7495
      3951 7553 3958 7554 3958 7556 3846 7503

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 1, 12:54 AM ESTSpecial Weather StatementPHICarbon, Lehigh, Monroe, Northampton96 min
Dec 1, 12:56 AM ESTSpecial Weather StatementPHIMonroe64 min
Dec 1, 4:02 AM ESTSpecial Weather StatementPHIPhiladelphia58 min
Dec 1, 5:42 AM ESTAreal Flood AdvisoryPHICarbon, Monroe4 hr
Dec 1, 6:35 AM ESTSpecial Weather StatementPHIBerks, Chester55 min
Dec 1, 7:01 AM ESTAreal Flood AdvisoryPHIBerks, Bucks, Chester, Lehigh, Montgomery, Northampton8 hr
Dec 1, 7:14 AM ESTSpecial Weather StatementPHICarbon, Lehigh61 min
Dec 1, 7:43 AM ESTSpecial Weather StatementPHIBerks, Bucks, Chester, Delaware, Lehigh, Montgomery and 2 more47 min
Dec 1, 8:36 AM ESTSpecial Weather StatementPHIBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more54 min
Dec 1, 8:58 AM ESTAreal Flood AdvisoryPHIBucks, Chester, Delaware, Montgomery, Philadelphia6 hr
Dec 1, 9:31 AM ESTSpecial Weather StatementPHIBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more59 min
Dec 1, 10:04 AM ESTAreal Flood AdvisoryPHICarbon, Monroe6 hr
Dec 1, 10:49 AM ESTSpecial Weather StatementPHIBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more56 min
Dec 1, 11:48 AM ESTSpecial Weather StatementPHIBucks, Delaware, Lehigh, Monroe, Montgomery, Northampton and 1 more57 min
Dec 1, 12:12 PM ESTSevere Thunderstorm WarningPHIBucks, Montgomery, Northampton, Philadelphia63 min
Dec 1, 12:45 PM ESTAreal Flood WarningPHIChester, Delaware, Montgomery, Philadelphia7 hr
Dec 1, 12:59 PM ESTAreal Flood AdvisoryPHIBucks, Monroe, Northampton4 hr
Dec 1, 1:27 AM ESTSpecial Weather StatementPHISussex, Warren63 min
Dec 1, 2:40 AM ESTSpecial Weather StatementPHIMercer, Middlesex65 min
Dec 1, 5:07 AM ESTSpecial Weather StatementPHIHunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset53 min
Dec 1, 6:18 AM ESTSpecial Weather StatementPHIMorris, Sussex, Warren57 min
Dec 1, 9:04 AM ESTAreal Flood AdvisoryPHIHunterdon, Middlesex, Morris, Somerset, Sussex, Warren4 hr
Dec 1, 11:47 AM ESTSpecial Marine WarningPHI58 min
Dec 1, 12:21 PM ESTSpecial Marine WarningPHI54 min
Dec 1, 1:16 PM ESTSevere Thunderstorm WarningPHIAtlantic, Burlington, Mercer, Middlesex, Monmouth, Morris and 3 more44 min
Dec 1, 1:21 PM ESTSpecial Marine WarningPHI84 min
Dec 1, 1:34 PM ESTAreal Flood AdvisoryPHIBurlington, Monmouth, Ocean4 hr
Dec 1, 2:06 PM ESTSpecial Weather StatementPHIMonmouth24 min
Dec 1, 3:52 PM ESTSmall Craft AdvisoryPHI19 hr
Dec 1, 6:48 AM ESTSpecial Weather StatementPHINew Castle57 min
Dec 1, 6:55 AM ESTSevere Thunderstorm WarningPHIKent65 min
Dec 1, 7:12 AM ESTSpecial Weather StatementPHIKent63 min
Dec 1, 10:17 AM ESTSpecial Weather StatementPHINew Castle43 min
Dec 1, 10:33 AM ESTSevere Thunderstorm WarningPHIKent, New Castle42 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2010Severe Thunderstorm Warnings in New Jersey, 2010Severe Thunderstorm Warnings in Delaware, 2010Every severe thunderstorm warning in 2010

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.