Alert archive / New Jersey / Dense Fog Advisories in 2016

Dense Fog Advisory 4, NWS Philadelphia/Mount Holly

December 17, 20164 states

NWS Philadelphia/Mount Holly issued this dense fog advisory at Dec 17, 2016, 7:28 PM EST for 4 states. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued
Dec 17, 2016, 7:28 PM EST (00:28 UTC)
Expired
Dec 18, 2016, 6:47 AM EST
In force
11 hr
Issued by
NWS Philadelphia/Mount Holly
All 34 counties

Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Carbon County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 68 km from the middle of the area, began a volume at 00:28 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.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.5 hours before the alert went out and 219 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, Washington/Dulle, VA at 00:00Z on 2016-12-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Washington/Dulle, VA at 00:00Z on 2016-12-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 381 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
787 m above ground
0-6 km bulk shear
72 kt
0-1 km storm-relative helicity
381 m²/s²
0-3 km storm-relative helicity
399 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

535 
WWUS71 KPHI 180028
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
728 PM EST SAT DEC 17 2016

DEZ001>004-MDZ008-012-015-019-020-NJZ001-007>010-012>027-PAZ054-
055-060>062-070-071-101>106-181200-
/O.NEW.KPHI.FG.Y.0004.161218T0028Z-161218T1200Z/
NEW CASTLE-KENT-INLAND SUSSEX-DELAWARE BEACHES-CECIL-KENT MD-
QUEEN ANNES-TALBOT-CAROLINE-SUSSEX-WARREN-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-CARBON-MONROE-BERKS-LEHIGH-
NORTHAMPTON-DELAWARE-PHILADELPHIA-WESTERN CHESTER-EASTERN CHESTER-
WESTERN MONTGOMERY-EASTERN MONTGOMERY-UPPER BUCKS-LOWER BUCKS-
INCLUDING THE CITIES OF...WILMINGTON...DOVER...GEORGETOWN...
REHOBOTH BEACH...ELKTON...CHESTERTOWN...CENTREVILLE...EASTON...
DENTON...NEWTON...WASHINGTON...MORRISTOWN...FLEMINGTON...
SOMERVILLE...NEW BRUNSWICK...FREEHOLD...SANDY HOOK...TRENTON...
PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN...
MOUNT HOLLY...JACKSON...MILLVILLE...HAMMONTON...
CAPE MAY COURT HOUSE...OCEAN CITY...ATLANTIC CITY...
LONG BEACH ISLAND...WHARTON STATE FOREST...JIM THORPE...
STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...MEDIA...
PHILADELPHIA...HONEY BROOK...OXFORD...WEST CHESTER...
KENNETT SQUARE...COLLEGEVILLE...POTTSTOWN...NORRISTOWN...
LANSDALE...CHALFONT...PERKASIE...MORRISVILLE...DOYLESTOWN
728 PM EST SAT DEC 17 2016

...DENSE FOG ADVISORY IN EFFECT UNTIL 7 AM EST SUNDAY...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A DENSE
FOG ADVISORY...WHICH IS IN EFFECT UNTIL 7 AM EST SUNDAY.

* VISIBILITIES...ONE QUARTER MILE OR LESS AT TIMES.

* TIMING...OVERNIGHT TONIGHT INTO EARLY SUNDAY MORNING.

* IMPACTS...LIMITED VISIBILITIES WILL MAKE TRAVEL VERY DIFFICULT
  AT TIMES, ESPECIALLY WHERE THERE IS RAPIDLY CHANGING
  VISIBILITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE
REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN...
USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU.

&&

$$
5 follow-up statements
075 
WWUS71 KPHI 180434
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1134 PM EST SAT DEC 17 2016

DEZ002>004-MDZ008-012-015-019-020-NJZ021>024-180545-
/O.CAN.KPHI.FG.Y.0004.000000T0000Z-161218T1200Z/
KENT-INLAND SUSSEX-DELAWARE BEACHES-CECIL-KENT MD-QUEEN ANNES-
TALBOT-CAROLINE-CUMBERLAND-ATLANTIC-CAPE MAY-
ATLANTIC COASTAL CAPE MAY-
INCLUDING THE CITIES OF...DOVER...GEORGETOWN...REHOBOTH BEACH...
ELKTON...CHESTERTOWN...CENTREVILLE...EASTON...DENTON...
MILLVILLE...HAMMONTON...CAPE MAY COURT HOUSE...OCEAN CITY
1134 PM EST SAT DEC 17 2016

...DENSE FOG ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CANCELLED THE
DENSE FOG ADVISORY.

WARM FRONT HAS LIFTED THROUGH MOST OF THE DELMARVA...AND
VISIBILITIES HAVE RISEN. THEREFORE..THE DENSE FOG ADVISORY HAS
BEEN CANCELLED.

$$

DEZ001-NJZ001-007>010-012>020-025>027-PAZ054-055-060>062-070-071-
101>106-181200-
/O.CON.KPHI.FG.Y.0004.000000T0000Z-161218T1200Z/
NEW CASTLE-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-
WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-SALEM-GLOUCESTER-CAMDEN-
NORTHWESTERN BURLINGTON-OCEAN-COASTAL ATLANTIC-COASTAL OCEAN-
SOUTHEASTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-
DELAWARE-PHILADELPHIA-WESTERN CHESTER-EASTERN CHESTER-
WESTERN MONTGOMERY-EASTERN MONTGOMERY-UPPER BUCKS-LOWER BUCKS-
INCLUDING THE CITIES OF...WILMINGTON...NEWTON...WASHINGTON...
MORRISTOWN...FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...FREEHOLD...
SANDY HOOK...TRENTON...PENNSVILLE...GLASSBORO...CAMDEN...
CHERRY HILL...MOORESTOWN...MOUNT HOLLY...JACKSON...
ATLANTIC CITY...LONG BEACH ISLAND...WHARTON STATE FOREST...
JIM THORPE...STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...
EASTON...MEDIA...PHILADELPHIA...HONEY BROOK...OXFORD...
WEST CHESTER...KENNETT SQUARE...COLLEGEVILLE...POTTSTOWN...
NORRISTOWN...LANSDALE...CHALFONT...PERKASIE...MORRISVILLE...
DOYLESTOWN
1134 PM EST SAT DEC 17 2016

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 7 AM EST SUNDAY...

* VISIBILITIES...ONE QUARTER MILE OR LESS AT TIMES.

* TIMING...OVERNIGHT TONIGHT INTO EARLY SUNDAY MORNING.

* IMPACTS...LIMITED VISIBILITIES WILL MAKE TRAVEL VERY DIFFICULT
  AT TIMES...ESPECIALLY WHERE THERE IS RAPIDLY CHANGING
  VISIBILITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE
REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN...
USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU.

&&

$$

MPS
073 
WWUS71 KPHI 180823
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
323 AM EST SUN DEC 18 2016

DEZ001-NJZ016>020-025>027-PAZ070-071-180930-
/O.CAN.KPHI.FG.Y.0004.000000T0000Z-161218T1200Z/
NEW CASTLE-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-OCEAN-
COASTAL ATLANTIC-COASTAL OCEAN-SOUTHEASTERN BURLINGTON-DELAWARE-
PHILADELPHIA-
INCLUDING THE CITIES OF...WILMINGTON...PENNSVILLE...GLASSBORO...
CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY...JACKSON...
ATLANTIC CITY...LONG BEACH ISLAND...WHARTON STATE FOREST...
MEDIA...PHILADELPHIA
323 AM EST SUN DEC 18 2016

...DENSE FOG ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CANCELLED THE
DENSE FOG ADVISORY.

WARM FRONT CONTINUES TO LIFT TO THE NORTH, AND TEMPERATURES ARE
BEGINNING TO RISE. AS A RESULT...THE WIDESPREAD DENSE FOG IS
LIFTING...AND VISIBILITIES ARE IMPROVING TO OVER ONE-QUARTER MILE.
THEREFORE...THE DENSE FOG ADVISORY HAS BEEN CANCELLED.

$$

NJZ001-007>010-012>015-PAZ054-055-060>062-101>106-181200-
/O.CON.KPHI.FG.Y.0004.000000T0000Z-161218T1200Z/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-
WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-CARBON-MONROE-BERKS-
LEHIGH-NORTHAMPTON-WESTERN CHESTER-EASTERN CHESTER-
WESTERN MONTGOMERY-EASTERN MONTGOMERY-UPPER BUCKS-LOWER BUCKS-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...FREEHOLD...SANDY HOOK...
TRENTON...JIM THORPE...STROUDSBURG...READING...ALLENTOWN...
BETHLEHEM...EASTON...HONEY BROOK...OXFORD...WEST CHESTER...
KENNETT SQUARE...COLLEGEVILLE...POTTSTOWN...NORRISTOWN...
LANSDALE...CHALFONT...PERKASIE...MORRISVILLE...DOYLESTOWN
323 AM EST SUN DEC 18 2016

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 7 AM EST THIS
MORNING...

* VISIBILITIES...ONE QUARTER MILE OR LESS AT TIMES.

* TIMING...EARLY THIS MORNING.

* IMPACTS...LIMITED VISIBILITIES WILL MAKE TRAVEL VERY DIFFICULT
  AT TIMES...ESPECIALLY WHERE THERE IS RAPIDLY CHANGING
  VISIBILITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE
REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN...
USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU.

&&

$$

MPS
716 
WWUS71 KPHI 181013
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
513 AM EST SUN DEC 18 2016

NJZ013-014-PAZ101>104-181115-
/O.CAN.KPHI.FG.Y.0004.000000T0000Z-161218T1200Z/
WESTERN MONMOUTH-EASTERN MONMOUTH-WESTERN CHESTER-EASTERN CHESTER-
WESTERN MONTGOMERY-EASTERN MONTGOMERY-
INCLUDING THE CITIES OF...FREEHOLD...SANDY HOOK...HONEY BROOK...
OXFORD...WEST CHESTER...KENNETT SQUARE...COLLEGEVILLE...
POTTSTOWN...NORRISTOWN...LANSDALE
513 AM EST SUN DEC 18 2016

...DENSE FOG ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CANCELLED THE
DENSE FOG ADVISORY.

WARM FRONT CONTINUES TO LIFT TO THE NORTH...AND TEMPERATURES ARE
BEGINNING TO RISE. AS A RESULT...THE WIDESPREAD DENSE FOG IS
LIFTING...AND VISIBILITIES ARE IMPROVING TO OVER ONE-QUARTER MILE.
THEREFORE...THE DENSE FOG ADVISORY HAS BEEN CANCELLED.

$$

NJZ001-007>010-012-015-PAZ054-055-060>062-105-106-181200-
/O.CON.KPHI.FG.Y.0004.000000T0000Z-161218T1200Z/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-MERCER-CARBON-
MONROE-BERKS-LEHIGH-NORTHAMPTON-UPPER BUCKS-LOWER BUCKS-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...TRENTON...JIM THORPE...
STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON...
CHALFONT...PERKASIE...MORRISVILLE...DOYLESTOWN
513 AM EST SUN DEC 18 2016

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 7 AM EST THIS
MORNING...

* VISIBILITIES...ONE QUARTER MILE OR LESS AT TIMES.

* TIMING...EARLY THIS MORNING.

* IMPACTS...LIMITED VISIBILITIES WILL MAKE TRAVEL VERY DIFFICULT
  AT TIMES...ESPECIALLY WHERE THERE IS RAPIDLY CHANGING
  VISIBILITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE
REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN...
USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU.

&&

$$

MPS
763 
WWUS71 KPHI 181119
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
619 AM EST SUN DEC 18 2016

NJZ015-PAZ060-106-181230-
/O.CAN.KPHI.FG.Y.0004.000000T0000Z-161218T1200Z/
MERCER-BERKS-LOWER BUCKS-
INCLUDING THE CITIES OF...TRENTON...READING...MORRISVILLE...
DOYLESTOWN
619 AM EST SUN DEC 18 2016

...DENSE FOG ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CANCELLED THE
DENSE FOG ADVISORY.

WARM FRONT CONTINUES TO LIFT TO THE NORTH...AND TEMPERATURES
CONTINUE TO RISE. AS A RESULT...THE WIDESPREAD DENSE FOG IS
LIFTING...AND VISIBILITIES ARE IMPROVING TO OVER ONE-QUARTER
MILE. THEREFORE...THE DENSE FOG ADVISORY HAS BEEN CANCELLED.

$$

NJZ001-007>010-012-PAZ054-055-061-062-105-181230-
/O.CON.KPHI.FG.Y.0004.000000T0000Z-161218T1200Z/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-CARBON-MONROE-
LEHIGH-NORTHAMPTON-UPPER BUCKS-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...JIM THORPE...
STROUDSBURG...ALLENTOWN...BETHLEHEM...EASTON...CHALFONT...
PERKASIE
619 AM EST SUN DEC 18 2016

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 7 AM EST THIS
MORNING...

* VISIBILITIES...ONE QUARTER MILE OR LESS AT TIMES.

* TIMING...THIS MORNING.

* IMPACTS...LIMITED VISIBILITIES WILL MAKE TRAVEL VERY DIFFICULT
  AT TIMES...ESPECIALLY WHERE THERE IS RAPIDLY CHANGING
  VISIBILITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE
REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN...
USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU.

&&

$$
329 
WWUS71 KPHI 181147
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
647 AM EST SUN DEC 18 2016

NJZ001-007>010-012-PAZ054-055-061-062-105-181300-
/O.CAN.KPHI.FG.Y.0004.000000T0000Z-161218T1200Z/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-CARBON-MONROE-
LEHIGH-NORTHAMPTON-UPPER BUCKS-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...JIM THORPE...
STROUDSBURG...ALLENTOWN...BETHLEHEM...EASTON...CHALFONT...
PERKASIE
647 AM EST SUN DEC 18 2016

...DENSE FOG ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CANCELLED THE
DENSE FOG ADVISORY.

THERE MAY BE SOME LINGERING AREAS WHERE VISIBILITIES ARE LESS
THAN ONE-QUARTER MILE...BUT CONDITIONS ARE IMPROVING AND WILL
CONTINUE TO IMPROVE. THEREFORE...THE DENSE FOG ADVISORY HAS BEEN
CANCELLED.

$$

MPS

What forecasters said that day

The local office's own words before this dense fog advisory 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 dense fog advisory went out at Dec 17, 6:35 PM EST, 53 minutes earlier.

Area forecast discussion, Dec 17, 6:35 PM EST, 53 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
635 PM EST Sat Dec 17 2016

.SYNOPSIS...
Low pressure will slowly track through northern New York state on
Sunday morning and into the Canadian Maritimes Sunday afternoon. As
it does so, it will drag a cold front through the northern Mid-
Atlantic. A large area of high pressure will begin to build into the
region on Monday. The high will influence our weather through
Wednesday before moving out over the Atlantic on Wednesday night.
The next frontal system is forecast to impact the region Thursday
into Friday. High pressure is then expected for Saturday.

&&

.NEAR TERM /UNTIL 6 AM SUNDAY MORNING/...
We remain within a moist air mass tonight as the warm front moves
north across the region. Aside from the chance of showers early
tonight across the Poconos and Lehigh Valley, we expect fog and
drizzle to form, especially over eastern PA and northern NJ. Some of
the fog could be locally dense. This will present the chance of ice
to continue to develop on surfaces generally near and to the north
of I-78, where temperatures remain at or just below the freezing
point until around midnight. We have issued a SPS to highlight this
risk. With the absence of more substantial precip, the Winter
Weather Advisories were expired as of 4 PM, in collaboration with
surrounding WFOs.

PoPs will increase late tonight in advance of an approaching cold
front, with showers likely northwest of I-95 late. At this point,
temperatures should be above freezing everywhere, so liquid precip
is expected. The only hold out could be Carbon, Monroe, and Sussex
(NJ) counties, where a combination of colder temps/earlier arrival
of precip could lead to some additional icing issues. This is a low
probability, but the potential for which we will be monitoring.

&&

.SHORT TERM /6 AM SUNDAY MORNING THROUGH 6 PM SUNDAY/...
Cold frontal passage occurs late Sunday morning into the afternoon
across the area. Showers are likely with embedded heavier downpours
over the Poconos and Lehigh Valley. There could be extra ponding of
waters on roadways where any storm drains become clogged with
snow/leaves. The fog may also persist thru the morning near and to
the north of I-78, where higher Dew Point air advects over any
existing snow cover. We cannot rule out a rumble of thunder given
some instability traversing the region, but it's a low probability
such that was not included in the forecast. With the passage of the
cold front, northwest winds may gust up to around 30 mph in the
afternoon.

&&

.LONG TERM /SUNDAY NIGHT THROUGH SATURDAY/...
Synoptic overview...The period starts with a cold front pushing
offshore and surface high pressure building in. By Monday morning,
the broad high should be centered from Texas to New York. While the
high will begin to weaken on Monday night and continue to do so
through Wednesday, it will continue to affect our weather. On
Thursday, we'll have a warm front approaching the region from the
south and a cold front approaching from the west. Both are
associated with a surface low over the Great Lakes. There is some
question as to whether or not the warm front will track north
through the area, but it is more certain the cold front will, and
that should take place later in the day on Thursday or sometime early
on Friday. High pressure will then build in on Saturday.

Temperatures...For reference, normals for PHL are in the mid 40s and
around 30. Temperatures will run at or below normal Monday and
Tuesday. The region should be around normal on Wednesday and then at
or above normal through the remainder of the period.

Precipitation...Small POPS have been painted across the coastal
zones Tuesday night as there's some indication the cold front that
moves through on Sunday night will back northward aided by low
pressure forming along it. The next shot of precipitation for
everyone will come on Thursday into Friday as the cold front moves
through.

Winds...Gusty northwest to north winds on Sunday night up to 30 mph,
then diminishing early on Monday to 10 mph or less and remaining in
that range through Tuesday. Becoming westerly on Wednesday and
southerly on Thursday, but remaining light. The week will finish up
with winds from the west or northwest, behind the cold front. Speeds
will pick up right behind the cold front and gust to 25 mph and
then diminish into Saturday.

Impacts...the probability for widespread hazardous weather is low
during this forecast period. A few east of I95 could see some
snowflakes tomorrow night if the precip lingers and the cold air
gets here. Then on Thursday into Friday, some diurnally driven snow
is possible as the cold front works through.

&&

.AVIATION /00Z SUNDAY THROUGH THURSDAY/...
THE FOLLOWING DISCUSSION IS FOR KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY AND SURROUNDING AREAS.

Tonight...Predominantly IFR in stratus, fog, and drizzle across all
terminals. Winds will be south-southwest less than 10 knots to light
and variable at times.

Sunday...Predominantly IFR conditions in stratus, fog, and
occasional rain. Potential for up to around 60 KT wind at 2000 ft
Sunday morning. South-southwest winds 10 to 15 KT in the morning,
becoming northwest around 15 KT with gusts to 25 KT in the
afternoon.

OUTLOOK...
Sunday night...Conditions will transition to VFR. NW winds will
increase to 15-20 KT with 20-30 KT gusts during the evening, then
diminish overnight and become more northerly. Depending on how fast
the cold air gets in here and how long the precipitation persists,
the terminals east of I95 could see some light snow.

Monday through Tuesday...VFR. Light N winds.

Wednesday...VFR. Light W winds.

Thursday...VFR becoming MVFR. S winds 10 kt or less.

&&

.MARINE...
Tonight and Sunday...SCA remains up during the entire period on the
ocean, and for Delaware Bay on Sunday. Seas have already come up to
at or above 5 FT on the ocean waters, and winds will follow w/gusts
up to around 25 KT after midnight.

There is a low probability of a short period of Gale Force gusts
during the day on Sunday.

Marine Weather Statement issued for areas of fog with visibilities
down to 1 SM at times, likely to continue into Sunday morning.

OUTLOOK...
Sunday night...The cold front comes through Sunday evening. There is
a brief window Sunday evening (00-05Z Monday) for gale force wind
gusts. Winds will shift to the NW behind the front and winds
gradually diminish to sub-SCA levels by Monday morning.

Monday through Thursday...Sub-SCA conditions.

&&

.CLIMATE...
We have reviewed TTN and RDG ASOS water equivalent data. We'll check
again tomorrow with CoCoRAHS data. Its possible we'll add a small
amt to todays total at both sites but wont know more confidently
until more of todays reports are received tomorrow morning.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...None.
NJ...None.
DE...None.
MD...None.
MARINE...Small Craft Advisory until 6 AM EST Monday for ANZ450>455.
     Small Craft Advisory from midnight tonight to 1 AM EST Monday
     for ANZ430-431.

&&

Synopsis...Kruzdlo
Near Term...Franck
Short Term...Franck
Long Term...Kruzdlo
Aviation...Franck/Kruzdlo
Marine...Franck/Kruzdlo
Climate...635
Hazardous weather outlook, Dec 17, 4:35 PM EST, 2 hours 53 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
435 PM EST SAT DEC 17 2016

NJZ001-007-PAZ054-055-061-062-182145-
SUSSEX-WARREN-CARBON-MONROE-LEHIGH-NORTHAMPTON-
435 PM EST SAT DEC 17 2016

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

.DAY ONE...TONIGHT.

PATCHY...DENSE FOG IS POSSIBLE TONIGHT...ALONG WITH ICE ON SOME
UNTREATED SURFACES.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

PATCHY...DENSE FOG IS POSSIBLE SUNDAY MORNING.

HEAVY DOWNPOURS COULD LEAD TO PONDING OF WATER ON ROADWAYS DURING
THE DAY ON SUNDAY...ESPECIALLY WHERE LEAVES AND SNOW BLOCK STORM
DRAINS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NJZ008>010-PAZ060-101-103-105-182145-
MORRIS-HUNTERDON-SOMERSET-BERKS-WESTERN CHESTER-WESTERN MONTGOMERY-
UPPER BUCKS-
435 PM EST SAT DEC 17 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW
JERSEY...NORTHWEST NEW JERSEY...EAST CENTRAL PENNSYLVANIA AND
SOUTHEAST PENNSYLVANIA.

.DAY ONE...TONIGHT.

PATCHY...DENSE FOG IS POSSIBLE TONIGHT...ALONG WITH ICE ON SOME
UNTREATED SURFACES.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

PATCHY...DENSE FOG IS POSSIBLE SUNDAY MORNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NJZ012>015-PAZ070-071-102-104-106-182145-
MIDDLESEX-WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-DELAWARE-
PHILADELPHIA-EASTERN CHESTER-EASTERN MONTGOMERY-LOWER BUCKS-
435 PM EST SAT DEC 17 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW JERSEY...NORTHERN
NEW JERSEY AND SOUTHEAST PENNSYLVANIA.

.DAY ONE...TONIGHT.

PATCHY...DENSE FOG IS POSSIBLE TONIGHT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

PATCHY...DENSE FOG IS POSSIBLE SUNDAY MORNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

ANZ450>455-182145-
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-
435 PM EST SAT DEC 17 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS.

.DAY ONE...TONIGHT.

AREAS OF FOG MAY REDUCE VISIBILITY TO ONE MILE AT TIMES TONIGHT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

A BRIEF PERIOD OF GALE FORCE WINDS IS POSSIBLE SUNDAY EVENING.

AREAS OF FOG MAY REDUCE VISIBILITY TO ONE MILE AT TIMES SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

ANZ430-431-182145-
DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
435 PM EST SAT DEC 17 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR DELAWARE BAY WATERS.

.DAY ONE...TONIGHT.

AREAS OF FOG MAY REDUCE VISIBILITY TO ONE MILE AT TIMES TONIGHT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

A BRIEF PERIOD OF ISOLATED GALE FORCE WINDS IS POSSIBLE SUNDAY
EVENING.

AREAS OF FOG MAY REDUCE VISIBILITY TO ONE MILE AT TIMES SUNDAY.

AREAS OF FOG MAY REDUCE VISIBILITY TO ONE MILE AT TIMES SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

DEZ001>004-MDZ008-012-015-019-020-NJZ016>027-182145-
NEW CASTLE-KENT-INLAND SUSSEX-DELAWARE BEACHES-CECIL-KENT MD-
QUEEN ANNES-TALBOT-CAROLINE-SALEM-GLOUCESTER-CAMDEN-
NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY-
ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC-COASTAL OCEAN-
SOUTHEASTERN BURLINGTON-
435 PM EST SAT DEC 17 2016

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

.DAY ONE...TONIGHT.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, Dec 17, 1:33 PM EST, 5 hours 55 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
133 PM EST SAT DEC 17 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0830 AM     SNOW             4 NNW JACKSON TWP       40.15N  74.39W
12/17/2016  M1.7 INCH        OCEAN              NJ   COCORAHS

            24 HOUR SNOWFALL.

1000 AM     SNOW             6 ENE PALMERTON         40.84N  75.52W
12/17/2016  M1.7 INCH        CARBON             PA   COCORAHS

            24 HOUR SNOWFALL.

1100 AM     SNOW             GREEN POND              41.02N  74.48W
12/17/2016  M3.5 INCH        MORRIS             NJ   TRAINED SPOTTER

1230 PM     SNOW             BRODHEADSVILLE          40.92N  75.40W
12/17/2016  M2.0 INCH        MONROE             PA   SOCIAL MEDIA

1256 PM     FREEZING RAIN    PHILADELPHIA            39.95N  75.16W
12/17/2016  M0.10 INCH       PHILADELPHIA       PA   EMERGENCY MNGR

&&

EVENT NUMBER PHI1602326
EVENT NUMBER PHI1602327
EVENT NUMBER PHI1602328
EVENT NUMBER PHI1602329
EVENT NUMBER PHI1602330

MEOLA
Local storm report, Dec 17, 2:02 PM EST, 5 hours 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
202 PM EST SAT DEC 17 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1200 PM     SNOW             3 SE HARDYSTON TWP      41.07N  74.49W
12/17/2016  M2.7 INCH        MORRIS             NJ   COCORAHS

0145 PM     SNOW             TEWKSBURY TWP           40.70N  74.79W
12/17/2016  M3.5 INCH        HUNTERDON          NJ   TRAINED SPOTTER

            HELL MTN.

&&

EVENT NUMBER PHI1602331
EVENT NUMBER PHI1602332

MEOLA
Special weather statement, Dec 17, 2:29 PM EST, 4 hours 59 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
229 PM EST Sat Dec 17 2016

NJZ007>010-PAZ060>062-101-103-105-180000-
Warren-Morris-Hunterdon-Somerset-Berks-Lehigh-Northampton-
Western Chester-Western Montgomery-Upper Bucks-
Including the cities of...Washington...Morristown...Flemington...
Somerville...Reading...Allentown...Bethlehem...Easton...
Honey Brook...Oxford...Collegeville...Pottstown...Chalfont...
Perkasie
229 PM EST Sat Dec 17 2016

The combination of sprinkles...patchy fog...and drizzle...along
with temperatures remaining near or below freezing until around
midnight tonight...will lead to ice on some untreated surfaces.

The potential for icy surfaces will diminish after midnight when
temperatures rise above freezing. If traveling...be prepared for
slippery roads...and maintain a safe following distance.

Franck
Local storm report, Dec 17, 4:09 PM EST, 3 hours 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
409 PM EST SAT DEC 17 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1100 AM     SNOW             1 NE ROCKAWAY TWP       40.97N  74.49W
12/17/2016  M3.0 INCH        MORRIS             NJ   COCORAHS

            24 HOUR SNOWFALL.

1105 AM     SNOW             3 WSW BOWMANSTOWN       40.78N  75.71W
12/17/2016  M1.6 INCH        CARBON             PA   COCORAHS

            24 HOUR SNOWFALL.

0200 PM     SNOW             1 N LAVALLETTE          39.98N  74.07W
12/17/2016  M1.7 INCH        OCEAN              NJ   COCORAHS

            24 HOUR SNOWFALL.

0245 PM     SNOW             JEFFERSON TWP           40.96N  74.59W
12/17/2016  M4.0 INCH        MORRIS             NJ   SOCIAL MEDIA

0300 PM     SNOW             METUCHEN                40.54N  74.36W
12/17/2016  M2.1 INCH        MIDDLESEX          NJ   PUBLIC

0300 PM     FREEZING RAIN    METUCHEN                40.54N  74.36W
12/17/2016  M0.10 INCH       MIDDLESEX          NJ   PUBLIC

&&

EVENT NUMBER PHI1602333
EVENT NUMBER PHI1602334
EVENT NUMBER PHI1602335
EVENT NUMBER PHI1602336
EVENT NUMBER PHI1602337
EVENT NUMBER PHI1602338

MEOLA
Special weather statement, Dec 17, 4:16 PM EST, 3 hours 12 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
416 PM EST Sat Dec 17 2016

NJZ001-PAZ054-055-180000-
Sussex-Carbon-Monroe-
Including the cities of...Newton...Jim Thorpe...Stroudsburg
416 PM EST Sat Dec 17 2016

The combination of sprinkles...patchy fog...and drizzle...along
with temperatures remaining near or below freezing until around
midnight tonight...will lead to ice on some untreated surfaces.

The potential for icy surfaces will diminish after midnight when
temperatures rise above freezing. If traveling...be prepared for
slippery roads...and maintain a safe following distance.
Special weather statement, Dec 17, 6:50 PM EST, 38 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
650 PM EST Sat Dec 17 2016

NJZ001-PAZ054-055-180300-
Sussex-Carbon-Monroe-
Including the cities of...Newton...Jim Thorpe...Stroudsburg
650 PM EST Sat Dec 17 2016

The combination of sprinkles...patchy fog...and drizzle...along
with temperatures remaining near or below freezing until around
midnight tonight...will lead to ice on some untreated surfaces in
the Poconos and high terrain of northern Sussex County New Jersey.

The potential for icy surfaces will diminish after midnight when
temperatures rise above freezing. If traveling...be prepared for
slippery roads...and maintain a safe following distance.

DEZ001-002-MDZ008-012-015-019-020-NJZ007>010-012>024-026-027-
PAZ060>062-070-071-101>106-180300-
New Castle-Kent-Cecil-Kent MD-Queen Annes-Talbot-Caroline-Warren-
Morris-Hunterdon-Somerset-Middlesex-Western Monmouth-
Eastern Monmouth-Mercer-Salem-Gloucester-Camden-
Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May-
Atlantic Coastal Cape May-Coastal Ocean-Southeastern Burlington-
Berks-Lehigh-Northampton-Delaware-Philadelphia-Western Chester-
Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks-
Lower Bucks-
Including the cities of...Wilmington...Dover...Elkton...
Chestertown...Centreville...Easton...Denton...Washington...
Morristown...Flemington...Somerville...New Brunswick...Freehold...
Sandy Hook...Trenton...Pennsville...Glassboro...Camden...
Cherry Hill...Moorestown...Mount Holly...Jackson...Millville...
Hammonton...Cape May Court House...Ocean City...
Long Beach Island...Wharton State Forest...Reading...Allentown...
Bethlehem...Media...Philadelphia...Honey Brook...Oxford...
West Chester...Kennett Square...Collegeville...Pottstown...
Norristown...Lansdale...Chalfont...Perkasie...Morrisville...
Doylestown
650 PM EST Sat Dec 17 2016

A foggy period is expected early tonight in much of Eastern
Pennsylvania...New Jersey...Delaware and eastern Maryland.
Visibility may briefly be reduced to a quarter mile in a few
patches of dense fog, especially the snow covered portions of
eastern Pennsylvania and New Jersey.

Once the warm front passes late tonight and southwest winds
increase to 10 miles an hour, the fog should lift.

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 18, 1:14 PM ESTSpecial Marine WarningPHI2 hr
Dec 18, 1:29 PM ESTSpecial Weather StatementPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 8 more2 hr
Dec 18, 2:06 PM ESTSpecial Marine WarningPHI114 min
Dec 18, 2:33 PM ESTSpecial Marine WarningPHI117 min
Dec 18, 2:47 PM ESTSpecial Weather StatementPHIAtlantic, Cape May, Cumberland58 min
Dec 18, 3:24 PM ESTSpecial Marine WarningPHI36 min
Dec 18, 3:35 PM ESTSpecial Marine WarningPHI85 min
Dec 18, 3:52 PM ESTSpecial Weather StatementPHISussex38 min

Nearby

Dense Fog Advisories in New Jersey, 2016Dense Fog Advisories in Pennsylvania, 2016Dense Fog Advisories in Maryland, 2016Every dense fog advisory in 2016

Sources

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