Alert archive / New Jersey / Dense Fog Advisories in 2016
Dense Fog Advisory 4, NWS Philadelphia/Mount Holly
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.
- 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
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...635Hazardous 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
MEOLALocal 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
MEOLASpecial 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
MEOLASpecial 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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 18, 1:14 PM EST | Special Marine Warning | PHI | 2 hr | |
| Dec 18, 1:29 PM EST | Special Weather Statement | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 8 more | 2 hr |
| Dec 18, 2:06 PM EST | Special Marine Warning | PHI | 114 min | |
| Dec 18, 2:33 PM EST | Special Marine Warning | PHI | 117 min | |
| Dec 18, 2:47 PM EST | Special Weather Statement | PHI | Atlantic, Cape May, Cumberland | 58 min |
| Dec 18, 3:24 PM EST | Special Marine Warning | PHI | 36 min | |
| Dec 18, 3:35 PM EST | Special Marine Warning | PHI | 85 min | |
| Dec 18, 3:52 PM EST | Special Weather Statement | PHI | Sussex | 38 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.