Alert archive / New Jersey / Winter Storm Watches in 2017

Winter Storm Watch 4, NWS Philadelphia/Mount Holly

March 11, 20174 states

NWS Philadelphia/Mount Holly issued this winter storm watch at Mar 11, 2017, 3:52 PM EST for 4 states. It took effect at Mar 13, 2017, 8:00 PM EDT. It was in force for .

The area

The counties it named.

The facts

Issued
Mar 11, 2017, 3:52 PM EST (20:52 UTC)
In effect from
Mar 13, 2017, 8:00 PM EDT
Expired
Mar 13, 2017, 4:21 AM EDT
In force
Issued by
NWS Philadelphia/Mount Holly
All 27 counties

New Castle County, DE, Cecil County, MD, Atlantic County, NJ, Burlington County, NJ, Camden 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), 65 km from the middle of the area, began a volume at 20:55 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

Brookhaven, NY (KOKX), launched 12:00Z, 8.9 hours before the alert went out and 201 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, Brookhaven, NY at 12:00Z on 2017-03-11Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2017-03-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.1939587897117136Sfc1 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
1643 m above ground
0-6 km bulk shear
119 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
55 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

085 
WWUS41 KPHI 112052
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
352 PM EST Sat Mar 11 2017

...A MAJOR COASTAL STORM WILL AFFECT THE REGION MONDAY NIGHT
AND TUESDAY...

.Low pressure will develop off the Carolina coast Monday and move
northeast toward the Mid-Atlantic by Tuesday. Heavy precipitation
will develop along and west of the track of the low. Temperatures
will be cold enough for snow in much of the area Monday night and
Tuesday with substantial snow accumulations possible.

DEZ001-MDZ008-NJZ001-007>010-012>022-027-PAZ054-055-060>062-070-
071-101>106-120900-
/O.NEW.KPHI.WS.A.0004.170314T0000Z-170315T0000Z/
New Castle-Cecil-Sussex-Warren-Morris-Hunterdon-Somerset-
Middlesex-Western Monmouth-Eastern Monmouth-Mercer-Salem-
Gloucester-Camden-Northwestern Burlington-Ocean-Cumberland-
Atlantic-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, Elkton, Newton, Washington, 
Morristown, Flemington, Somerville, New Brunswick, Freehold, 
Sandy Hook, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, 
Moorestown, Mount Holly, Jackson, Millville, Hammonton, 
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, 
and Doylestown
352 PM EST Sat Mar 11 2017

...WINTER STORM WATCH IN EFFECT FROM MONDAY EVENING THROUGH
TUESDAY EVENING...

The National Weather Service in Mount Holly has issued a Winter
Storm Watch, which is in effect from Monday evening through
Tuesday evening.

* LOCATIONS...Eastern Pennsylvania, all but far southeastern New
  Jersey, northern Delaware, and the northern portions of the
  Eastern Shore of Maryland.

* HAZARD TYPES...Heavy snow and strong winds.

* ACCUMULATIONS...Potential for storm total snowfall greater than
  6 inches. However, there remains uncertainty in exact totals as
  a sharp gradient will exist between the heaviest snowfall and
  locations where very little snow may occur. Changes to the
  forecast track of the storm can result in substantial changes in
  the total accumulations.

* TIMING...Snow begins Monday evening from southwest to northeast
  across the watch area. Snow will continue on Tuesday with
  potential for transition to a wintry mix or rain southeast of
  I-95. Any wintry mix or rain may transition back to snow 
  Tuesday evening before diminishing Tuesday night.

* IMPACTS...Heavy snow may cause significant travel disruptions. 

* WINDS...Northeast 10 to 20 mph with gusts up to 40 mph. The
  highest winds should occur southeast of the I-295 corridor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is a potential for significant
snow...sleet...or ice accumulations that may impact travel.
Continue to monitor the latest forecasts.

Snowfall and ice accumulation forecast maps in addition to
experimental probabilistic snowfall information for the latest
event are available online at www.weather.gov/phi/winter

&&

$$

CMS/MPS/MJG/MWG
5 follow-up statements
783 
WWUS41 KPHI 120805
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
405 AM EDT Sun Mar 12 2017

...A MAJOR COASTAL STORM WILL AFFECT THE REGION MONDAY NIGHT AND
TUESDAY...

.Low pressure will develop off the Carolina coast Monday and move
northeast toward the Mid-Atlantic by Tuesday. Heavy precipitation
will develop along and west of the track of the low. Temperatures
will be cold enough for snow in much of the area Monday night and
Tuesday with substantial snow accumulations possible.

NJZ026-122015-
/O.EXA.KPHI.WS.A.0004.170314T0000Z-170315T0000Z/
Coastal Ocean-
Including the city of Long Beach Island
405 AM EDT Sun Mar 12 2017

...WINTER STORM WATCH IN EFFECT FROM MONDAY EVENING THROUGH
TUESDAY EVENING...

The National Weather Service in Mount Holly has issued a Winter
Storm Watch, which is in effect from Monday evening through
Tuesday evening.

* LOCATIONS...Eastern Pennsylvania, all but far southeastern New
  Jersey, northern Delaware, and the northern portions of the
  Eastern Shore of Maryland.

* HAZARD TYPES...Heavy snow and strong winds.

* ACCUMULATIONS...Snow accumulation of 6 to 10 inches.

* TIMING...Snow begins Monday evening from southwest to northeast
  across the watch area. Snow will continue Tuesday into Tuesday
  evening...though some locations may see a brief break in the
  snow Tuesday afternoon.

* IMPACTS...The heavy snow will make many roads impassable and may
  produce widespread power outages due to the weight of the snow
  on tree limbs and power lines. Strong winds could lead to 
  blowing snow, reduced visibility, and additional power outages. 

* WINDS...Northeast 10 to 25 mph with gusts up to 40 mph.
  Strongest gusts are expected along the coast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is a potential for significant
snow...sleet...or ice accumulations that may impact travel.
Continue to monitor the latest forecasts.

Snowfall and ice accumulation forecast maps in addition to
experimental probabilistic snowfall information for the latest
event are available online at www.weather.gov/phi/winter

&&

$$

DEZ001-MDZ008-NJZ001-007>010-012>022-027-PAZ054-055-060>062-070-
071-101>106-122015-
/O.CON.KPHI.WS.A.0004.170314T0000Z-170315T0000Z/
New Castle-Cecil-Sussex-Warren-Morris-Hunterdon-Somerset-
Middlesex-Western Monmouth-Eastern Monmouth-Mercer-Salem-
Gloucester-Camden-Northwestern Burlington-Ocean-Cumberland-
Atlantic-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, Elkton, Newton, Washington, 
Morristown, Flemington, Somerville, New Brunswick, Freehold, 
Sandy Hook, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, 
Moorestown, Mount Holly, Jackson, Millville, Hammonton, 
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, 
and Doylestown
405 AM EDT Sun Mar 12 2017

...WINTER STORM WATCH REMAINS IN EFFECT FROM MONDAY EVENING
THROUGH TUESDAY EVENING...

* LOCATIONS...Eastern Pennsylvania, all but far southeastern New 
  Jersey, northern Delaware, and the northern portions of the 
  Eastern Shore of Maryland.

* HAZARD TYPES...Heavy snow and strong winds.

* ACCUMULATIONS...Snow accumulation of 8 to 12 inches.

* TIMING...Snow begins Monday evening from southwest to northeast
  across the watch area. Snow will continue Tuesday into Tuesday
  evening...though some locations may see a brief break in the
  snow Tuesday afternoon.

* IMPACTS...The heavy snow will make many roads impassable and 
  may produce widespread power outages due to the weight of the 
  snow on tree limbs and power lines. Strong winds will lead to 
  blowing snow, reduced visibility, and additional power 
  outages. 

* WINDS...Northeast 15 to 25 mph with gusts up to 40 mph.
  Strongest gusts are expected along the coast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is a potential for significant
snow...sleet...or ice accumulations that may impact travel.
Continue to monitor the latest forecasts.

Snowfall and ice accumulation forecast maps in addition to
experimental probabilistic snowfall information for the latest
event are available online at www.weather.gov/phi/winter

&&

$$

SFJ
085 
WWUS41 KPHI 120959
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
559 AM EDT Sun Mar 12 2017

...A MAJOR COASTAL STORM WILL AFFECT THE REGION MONDAY NIGHT AND
TUESDAY...

.Low pressure will develop off the Carolina coast Monday and move
northeast toward the Mid-Atlantic by Tuesday. Heavy precipitation
will develop along and west of the track of the low. Temperatures
will be cold enough for snow in much of the area Monday night and
Tuesday with substantial snow accumulations possible.

DEZ001-MDZ008-NJZ001-007>010-012>022-026-027-PAZ054-055-060>062-
070-071-101>106-122200-
/O.CON.KPHI.WS.A.0004.170314T0000Z-170315T0000Z/
New Castle-Cecil-Sussex-Warren-Morris-Hunterdon-Somerset-
Middlesex-Western Monmouth-Eastern Monmouth-Mercer-Salem-
Gloucester-Camden-Northwestern Burlington-Ocean-Cumberland-
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, Elkton, Newton, Washington, 
Morristown, Flemington, Somerville, New Brunswick, Freehold, 
Sandy Hook, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, 
Moorestown, Mount Holly, Jackson, Millville, Hammonton, 
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,
and Doylestown
559 AM EDT Sun Mar 12 2017

...WINTER STORM WATCH REMAINS IN EFFECT FROM MONDAY EVENING
THROUGH TUESDAY EVENING...

* LOCATIONS...Eastern Pennsylvania, all but far southeastern New 
  Jersey, northern Delaware, and the northern portions of the 
  Eastern Shore of Maryland.

* HAZARD TYPES...Heavy snow and strong winds.

* ACCUMULATIONS...Snow accumulation of 6 to 12 inches.

* TIMING...Snow begins Monday evening from southwest to 
  northeast across the watch area. Snow will continue Tuesday 
  into Tuesday evening...though some locations may see a brief 
  break in the snow Tuesday afternoon.

* IMPACTS...The heavy snow will make many roads impassable and 
  may produce widespread power outages due to the weight of the 
  snow on tree limbs and power lines. Strong winds will lead to 
  blowing snow, reduced visibility, and additional power outages.

* WINDS...Northeast 15 to 25 mph with gusts up to 40 mph. 
  Strongest gusts are expected along the coast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is a potential for significant
snow...sleet...or ice accumulations that may impact travel.
Continue to monitor the latest forecasts.

Snowfall and ice accumulation forecast maps in addition to
experimental probabilistic snowfall information for the latest
event are available online at www.weather.gov/phi/winter

&&

$$

SFJ
457 
WWUS41 KPHI 121908
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
308 PM EDT Sun Mar 12 2017

...A MAJOR COASTAL STORM WILL AFFECT THE REGION MONDAY NIGHT AND
TUESDAY...

.Low pressure will develop off the Carolina coast Monday and become
an intense storm as it moves east of New Jersey on Tuesday. Heavy
precipitation will develop along and west of the track of the
storm. Temperatures will be cold enough for snow in much of the 
area Monday night and Tuesday with substantial accumulations. 

NJZ001-007>010-012-015-PAZ054-055-060>062-101>106-130715-
/O.UPG.KPHI.WS.A.0004.170314T0000Z-170315T0000Z/
/O.NEW.KPHI.WS.W.0003.170314T0000Z-170314T2200Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-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, Trenton, Jim Thorpe, 
Stroudsburg, Reading, Allentown, Bethlehem, Easton, Honey Brook, 
Oxford, West Chester, Kennett Square, Collegeville, Pottstown, 
Norristown, Lansdale, Chalfont, Perkasie, Morrisville, 
and Doylestown
308 PM EDT Sun Mar 12 2017

...WINTER STORM WARNING IN EFFECT FROM 8 PM MONDAY TO 6 PM EDT
TUESDAY...

The National Weather Service in Mount Holly has issued a Winter
Storm Warning for heavy snow, which is in effect from 8 PM Monday
to 6 PM EDT Tuesday. The Winter Storm Watch is no longer in 
effect.

* LOCATIONS...Eastern Pennsylvania and much of northern New Jersey.

* HAZARD TYPES...Heavy snow and strong winds.

* ACCUMULATIONS...Snow accumulation of 8 to 18 inches.

* TIMING...Snow begins Monday evening from southwest to northeast
  across the warning area, becoming heavy at times with snowfall
  rates of one to two inches per hour late Monday night and
  Tuesday morning. Snow will diminish by Tuesday evening.

* IMPACTS...The heavy snow will make travel difficult or
  impossible late Monday night and Tuesday.

* WINDS...Northeast 10 to 20 mph with gusts up to 35 mph.

* VISIBILITIES...One quarter mile or less at times, especially 
  Tuesday morning.

* TEMPERATURES...Generally in the 20s.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for heavy snow means severe winter weather
conditions are expected or occurring. Significant amounts of snow
are forecast that will make travel dangerous. Only travel in an 
emergency. If you must travel...keep an extra flashlight... 
food...and water in your vehicle in case of an emergency.

Report snow and ice accumulation to the National Weather Service
by calling our trained spotter line...posting to the NWS Mount
Holly Facebook page...or using Twitter.

Snowfall and ice accumulation forecast maps in addition to
experimental probabilistic snowfall information for the latest
event are available online at www.weather.gov/phi/winter

&&

$$

DEZ001-MDZ008-NJZ016>019-PAZ070-071-130715-
/O.UPG.KPHI.WS.A.0004.170314T0000Z-170315T0000Z/
/O.NEW.KPHI.WS.W.0003.170314T0000Z-170314T2000Z/
New Castle-Cecil-Salem-Gloucester-Camden-Northwestern Burlington-
Delaware-Philadelphia-
Including the cities of Wilmington, Elkton, Pennsville, 
Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Media, 
and Philadelphia
308 PM EDT Sun Mar 12 2017

...WINTER STORM WARNING IN EFFECT FROM 8 PM MONDAY TO 4 PM EDT
TUESDAY...

The National Weather Service in Mount Holly has issued a Winter
Storm Warning for heavy snow, which is in effect from 8 PM Monday
to 4 PM EDT Tuesday. The Winter Storm Watch is no longer in 
effect.

* LOCATIONS...The Philadelphia metropolitan area and adjacent
  southwest New Jersey, northern Delaware, and the northern
  portions of the Eastern Shore of Maryland.

* HAZARD TYPES...Heavy snow and strong winds.

* ACCUMULATIONS...Snow accumulation of 6 to 12 inches. There is a
  chance that a transition to a wintry mix or rain may occur for a
  time Tuesday morning, which could limit storm total snowfall 
  amounts.

* TIMING...Snow begins Monday evening, becoming heavy at times 
  late Monday night through midday Tuesday. Snow will diminish by 
  late Tuesday afternoon.

* IMPACTS...The heavy snow will make travel difficult or
  impossible Monday night and Tuesday and may produce power 
  outages due to the weight of the snow on tree limbs and power 
  lines. 

* WINDS...Northeast 15 to 25 mph with gusts up to 40 mph.

* VISIBILITIES...One quarter mile or less at times, especially 
  Tuesday morning.

* TEMPERATURES...Generally in the upper 20s to the lower 30s.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for heavy snow means severe winter weather
conditions are expected or occurring.  Significant amounts of
snow are forecast that will make travel dangerous. Only travel in
an emergency. If you must travel...keep an extra flashlight...
food...and water in your vehicle in case of an emergency.

Report snow and ice accumulation to the National Weather Service
by calling our trained spotter line...posting to the NWS Mount
Holly Facebook page...or using Twitter.

Snowfall and ice accumulation forecast maps in addition to
experimental probabilistic snowfall information for the latest
event are available online at www.weather.gov/phi/winter

&&

$$

NJZ013-014-020>022-026-027-130715-
/O.EXT.KPHI.WS.A.0004.170314T0000Z-170314T2200Z/
Western Monmouth-Eastern Monmouth-Ocean-Cumberland-Atlantic-
Coastal Ocean-Southeastern Burlington-
Including the cities of Freehold, Sandy Hook, Jackson, Millville,
Hammonton, Long Beach Island, and Wharton State Forest
308 PM EDT Sun Mar 12 2017

...WINTER STORM WATCH NOW IN EFFECT FROM MONDAY EVENING THROUGH
TUESDAY AFTERNOON...

* LOCATIONS...Portions of eastern New Jersey.

* HAZARD TYPES...Heavy snow and strong winds.

* ACCUMULATIONS...Potential for storm total snowfall greater than
  6 inches. However, there remains uncertainty in exact totals as
  a sharp gradient will exist between the heaviest snowfall and
  locations where very little snow may occur. Changes to the
  forecast track of the storm can result in substantial changes in
  the total accumulations.

* TIMING...Snow begins Monday evening from southwest to northeast
  across the watch area. Snow will continue through Tuesday
  afternoon, but there is potential for transition to a wintry mix
  or rain during the day, which could limit storm total snowfall
  amounts.

* IMPACTS...Heavy snow may cause significant travel disruptions. 

* WINDS...Northeast 20 to 30 mph with gusts up to 50 mph.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is a potential for significant
snow...sleet...or ice accumulations that may impact travel.
Continue to monitor the latest forecasts.

Snowfall and ice accumulation forecast maps in addition to
experimental probabilistic snowfall information for the latest
event are available online at www.weather.gov/phi/winter

&&

$$

CMS/WD/MJG
219 
WWUS41 KPHI 130131
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
931 PM EDT Sun Mar 12 2017

...A MAJOR COASTAL STORM WILL AFFECT THE REGION MONDAY NIGHT AND
TUESDAY...

.Low pressure will develop off the Carolina coast Monday, becoming an
intense storm as it moves east of New Jersey on Tuesday. Heavy 
precipitation will develop along and west of the track of the 
storm. Temperatures will be cold enough for snow in much of the 
area Monday night and Tuesday with substantial accumulations
expected.

NJZ001-007>010-012-015-PAZ054-055-060>062-101>106-131400-
/O.CON.KPHI.WS.W.0003.170314T0000Z-170314T2200Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-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, Trenton, Jim Thorpe, 
Stroudsburg, Reading, Allentown, Bethlehem, Easton, Honey Brook, 
Oxford, West Chester, Kennett Square, Collegeville, Pottstown, 
Norristown, Lansdale, Chalfont, Perkasie, Morrisville, 
and Doylestown
931 PM EDT Sun Mar 12 2017

...WINTER STORM WARNING REMAINS IN EFFECT FROM 8 PM MONDAY TO
6 PM EDT TUESDAY...

* LOCATIONS...Eastern Pennsylvania and much of northern New 
  Jersey.

* HAZARD TYPES...Heavy snow and strong winds.

* ACCUMULATIONS...Snow accumulation of 8 to 18 inches.

* TIMING...Snow begins Monday evening from southwest to 
  northeast across the warning area, becoming heavy at times 
  with snowfall rates of one to two inches per hour late Monday 
  night and Tuesday morning. Snow will diminish by Tuesday 
  evening.

* IMPACTS...The heavy snow will make travel difficult or 
  impossible late Monday night and Tuesday. 

* WINDS...Northeast 10 to 20 mph with gusts up to 35 mph.

* VISIBILITIES...One quarter mile or less at times, especially
  Tuesday morning.

* TEMPERATURES...Generally in the 20s.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for heavy snow means severe winter weather
conditions are expected or occurring. Significant amounts of snow
are forecast that will make travel dangerous. Only travel in an
emergency. If you must travel...keep an extra flashlight...
food...and water in your vehicle in case of an emergency.

Report snow and ice accumulation to the National Weather Service
by calling our trained spotter line...posting to the NWS Mount
Holly Facebook page...or using Twitter.

Snowfall and ice accumulation forecast maps in addition to
experimental probabilistic snowfall information for the latest
event are available online at www.weather.gov/phi/winter

&&

$$

DEZ001-MDZ008-NJZ016>019-PAZ070-071-131400-
/O.CON.KPHI.WS.W.0003.170314T0000Z-170314T2000Z/
New Castle-Cecil-Salem-Gloucester-Camden-Northwestern Burlington-
Delaware-Philadelphia-
Including the cities of Wilmington, Elkton, Pennsville, 
Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Media, 
and Philadelphia
931 PM EDT Sun Mar 12 2017

...WINTER STORM WARNING REMAINS IN EFFECT FROM 8 PM MONDAY TO
4 PM EDT TUESDAY...

* LOCATIONS...The Philadelphia metropolitan area and adjacent 
  southwest New Jersey, northern Delaware, and the northern 
  portions of the Eastern Shore of Maryland.

* HAZARD TYPES...Heavy snow and strong winds.

* ACCUMULATIONS...Snow accumulation of 6 to 12 inches. There is a
  chance that a transition to a wintry mix or rain may occur for a
  time Tuesday morning, which could limit storm total snowfall 
  amounts.

* TIMING...Snow begins Monday evening, becoming heavy at times 
  late Monday night through midday Tuesday. Snow will diminish 
  by late Tuesday afternoon.

* IMPACTS...The heavy snow will make travel difficult or
  impossible Monday night and Tuesday and may produce power 
  outages due to the weight of the snow on tree limbs and power 
  lines. 

* WINDS...Northeast 15 to 25 mph with gusts up to 40 mph.

* VISIBILITIES...One quarter mile or less at times, especially
  Tuesday morning.

* TEMPERATURES...Generally in the upper 20s to the lower 30s.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for heavy snow means severe winter weather
conditions are expected or occurring.  Significant amounts of
snow are forecast that will make travel dangerous. Only travel in
an emergency. If you must travel...keep an extra flashlight...
food...and water in your vehicle in case of an emergency.

Report snow and ice accumulation to the National Weather Service
by calling our trained spotter line...posting to the NWS Mount
Holly Facebook page...or using Twitter.

Snowfall and ice accumulation forecast maps in addition to
experimental probabilistic snowfall information for the latest
event are available online at www.weather.gov/phi/winter

&&

$$

NJZ013-014-020>022-026-027-131400-
/O.CON.KPHI.WS.A.0004.170314T0000Z-170314T2200Z/
Western Monmouth-Eastern Monmouth-Ocean-Cumberland-Atlantic-
Coastal Ocean-Southeastern Burlington-
Including the cities of Freehold, Sandy Hook, Jackson, Millville,
Hammonton, Long Beach Island, and Wharton State Forest
931 PM EDT Sun Mar 12 2017

...WINTER STORM WATCH REMAINS IN EFFECT FROM MONDAY EVENING
THROUGH TUESDAY AFTERNOON...

* LOCATIONS...Portions of eastern New Jersey.

* HAZARD TYPES...Heavy snow and strong winds.

* ACCUMULATIONS...Potential for storm total snowfall greater than
  6 inches. However, there remains uncertainty in exact totals as
  a sharp gradient will exist between the heaviest snowfall and
  locations where very little snow occurs. Even small changes to
  the forecast track of the storm can result in substantial
  changes to the total accumulations.

* TIMING...Snow begins Monday evening from southwest to 
  northeast across the watch area. Snow will continue through 
  Tuesday afternoon, but there is potential for transition to a 
  wintry mix or rain during the day, which could limit storm 
  total snowfall amounts.

* IMPACTS...Heavy snow may cause significant travel disruptions. 

* WINDS...Northeast 20 to 30 mph with gusts up to 50 mph.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is a potential for significant
snow...sleet...or ice accumulations that may impact travel.
Continue to monitor the latest forecasts.

Snowfall and ice accumulation forecast maps in addition to
experimental probabilistic snowfall information for the latest
event are available online at www.weather.gov/phi/winter

&&

$$

CMS
391 
WWUS41 KPHI 130821
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
421 AM EDT Mon Mar 13 2017

...A MAJOR COASTAL STORM WILL AFFECT THE REGION MONDAY NIGHT AND
TUESDAY...

.Low pressure will develop off the Carolina coast Monday,
becoming an intense storm as it moves east of New Jersey on
Tuesday. Heavy precipitation will develop along and west of the
track of the storm. Temperatures will be cold enough for snow in
much of the area Monday night and Tuesday with substantial
accumulations expected.

NJZ013-014-020-026-132030-
/O.UPG.KPHI.WS.A.0004.170314T0000Z-170314T2200Z/
/O.NEW.KPHI.BZ.W.0001.170314T0000Z-170314T2200Z/
Western Monmouth-Eastern Monmouth-Ocean-Coastal Ocean-
Including the cities of Freehold, Sandy Hook, Jackson, 
and Long Beach Island
421 AM EDT Mon Mar 13 2017

...BLIZZARD WARNING IN EFFECT FROM 8 PM THIS EVENING TO 6 PM EDT
TUESDAY...

The National Weather Service in Mount Holly has issued a Blizzard
Warning, which is in effect from 8 PM this evening to 6 PM EDT
Tuesday. The Winter Storm Watch is no longer in effect.

* LOCATIONS...Portions of eastern New Jersey.

* HAZARD TYPES...Heavy snow and strong winds.

* ACCUMULATIONS...Snow accumulation of 10 to 14 inches.

* TIMING...Snow begins Monday evening from southwest to northeast
  across the warning area and will continue through Tuesday
  afternoon.

* IMPACTS...The heavy snow will make many roads impassable and 
  may produce widespread power outages due to the weight of the 
  snow on tree limbs and power lines. Strong winds will lead to 
  blowing snow, reduced visibility, and additional power 
  outages. 

* WINDS...Northeast 25 to 35 mph with gusts up to 50 mph.

* VISIBILITIES...One quarter mile or less at times.

* TEMPERATURES...In the lower 30s.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Blizzard Warning means severe winter weather conditions are
expected or occurring. Falling and blowing snow with strong winds
and poor visibilities are likely. This will lead to whiteout
conditions...making travel extremely dangerous. Do not travel. If
you must travel...have a winter survival kit with you. If you get
stranded...stay with your vehicle.

&&

$$

NJZ021-022-027-132030-
/O.UPG.KPHI.WS.A.0004.170314T0000Z-170314T2200Z/
/O.EXA.KPHI.WS.W.0003.170314T0000Z-170314T2200Z/
Cumberland-Atlantic-Southeastern Burlington-
Including the cities of Millville, Hammonton, 
and Wharton State Forest
421 AM EDT Mon Mar 13 2017

...WINTER STORM WARNING IN EFFECT FROM 8 PM THIS EVENING TO 6 PM
EDT TUESDAY...

The National Weather Service in Mount Holly has issued a Winter
Storm Warning for heavy snow, which is in effect from 8 PM this 
evening to 6 PM EDT Tuesday. The Winter Storm Watch is no longer 
in effect.

* LOCATIONS...Portions of eastern New Jersey.

* HAZARD TYPES...Heavy snow and gusty winds.

* ACCUMULATIONS...Snow accumulation of 6 to 10 inches.

* TIMING...Snow begins Monday evening from southwest to northeast
  across the warning area and will continue through Tuesday 
  afternoon.

* IMPACTS...The heavy snow will make many roads impassable and 
  may produce widespread power outages due to the weight of the 
  snow on tree limbs and power lines. Strong winds will lead to 
  blowing snow, reduced visibility, and additional power 
  outages. 

* WINDS...Northeast 15 to 25 mph with gusts up to 35 mph.

* VISIBILITIES...One quarter mile or less at times.

* TEMPERATURES...In the lower 30s.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for heavy snow means severe winter weather
conditions are expected or occurring.  Significant amounts of
snow are forecast that will make travel dangerous. Only travel in
an emergency. If you must travel...keep an extra flashlight...
food...and water in your vehicle in case of an emergency.

Report snow and ice accumulation to the National Weather Service
by calling our trained spotter line...posting to the NWS Mount
Holly Facebook page...or using Twitter.

Snowfall and ice accumulation forecast maps in addition to
experimental probabilistic snowfall information for the latest
event are available online at www.weather.gov/phi/winter

&&

$$

MDZ012-132030-
/O.EXA.KPHI.WS.W.0003.170314T0000Z-170314T2000Z/
Kent MD-
Including the city of Chestertown
421 AM EDT Mon Mar 13 2017

...WINTER STORM WARNING IN EFFECT FROM 8 PM THIS EVENING TO 4 PM
EDT TUESDAY...

The National Weather Service in Mount Holly has issued a Winter
Storm Warning for heavy snow, which is in effect from 8 PM this 
evening to 4 PM EDT Tuesday.

* LOCATIONS...Portions of eastern Maryland.

* HAZARD TYPES...Heavy snow and strong winds.

* ACCUMULATIONS...Snow accumulation of 4 to 8 inches.

* TIMING...Snow begins Monday evening and will continue into 
  Tuesday afternoon.

* IMPACTS...The heavy snow will make many roads impassable and 
  may produce widespread power outages due to the weight of the 
  snow on tree limbs and power lines. 

* WINDS...Northeast 15 to 25 mph with gusts up to 35 mph.

* VISIBILITIES...One quarter mile or less at times.

* TEMPERATURES...In the mid 30s.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for heavy snow means severe winter weather
conditions are expected or occurring.  Significant amounts of
snow are forecast that will make travel dangerous. Only travel in
an emergency. If you must travel...keep an extra flashlight...
food...and water in your vehicle in case of an emergency.

Report snow and ice accumulation to the National Weather Service
by calling our trained spotter line...posting to the NWS Mount
Holly Facebook page...or using Twitter.

Snowfall and ice accumulation forecast maps in addition to
experimental probabilistic snowfall information for the latest
event are available online at www.weather.gov/phi/winter

&&

$$

NJZ001-007>010-012-015-PAZ054-055-060>062-101>106-132030-
/O.CON.KPHI.WS.W.0003.170314T0000Z-170314T2200Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-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, Trenton, Jim Thorpe, 
Stroudsburg, Reading, Allentown, Bethlehem, Easton, Honey Brook, 
Oxford, West Chester, Kennett Square, Collegeville, Pottstown, 
Norristown, Lansdale, Chalfont, Perkasie, Morrisville, 
and Doylestown
421 AM EDT Mon Mar 13 2017

...WINTER STORM WARNING REMAINS IN EFFECT FROM 8 PM THIS EVENING
TO 6 PM EDT TUESDAY...

* LOCATIONS...Eastern Pennsylvania and much of northern New 
  Jersey.

* HAZARD TYPES...Heavy snow and strong winds.

* ACCUMULATIONS...Snow accumulation of 18 to 24 inches.

* TIMING...Snow begins Monday evening from southwest to 
  northeast across the warning area, becoming heavy at times 
  with snowfall rates of one to two inches per hour late Monday 
  night and Tuesday morning. Snow will diminish by Tuesday 
  evening.

* IMPACTS...The heavy snow will make many roads impassable and 
  may produce widespread power outages due to the weight of the 
  snow on tree limbs and power lines. 

* WINDS...Northeast 10 to 20 mph with gusts up to 35 mph.

* VISIBILITIES...One quarter mile or less at times.

* TEMPERATURES...In the upper 20s.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for heavy snow means severe winter weather
conditions are expected or occurring. Significant amounts of snow
are forecast that will make travel dangerous. Only travel in an
emergency. If you must travel...keep an extra flashlight...
food...and water in your vehicle in case of an emergency.

Report snow and ice accumulation to the National Weather Service
by calling our trained spotter line...posting to the NWS Mount
Holly Facebook page...or using Twitter.

Snowfall and ice accumulation forecast maps in addition to
experimental probabilistic snowfall information for the latest
event are available online at www.weather.gov/phi/winter

&&

$$

DEZ001-MDZ008-NJZ016>019-PAZ070-071-132030-
/O.CON.KPHI.WS.W.0003.170314T0000Z-170314T2000Z/
New Castle-Cecil-Salem-Gloucester-Camden-Northwestern Burlington-
Delaware-Philadelphia-
Including the cities of Wilmington, Elkton, Pennsville, 
Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Media, 
and Philadelphia
421 AM EDT Mon Mar 13 2017

...WINTER STORM WARNING REMAINS IN EFFECT FROM 8 PM THIS EVENING
TO 4 PM EDT TUESDAY...

* LOCATIONS...The Philadelphia metropolitan area and adjacent 
  southwest New Jersey, northern Delaware, and the northern 
  portions of the Eastern Shore of Maryland.

* HAZARD TYPES...Heavy snow and strong winds.

* ACCUMULATIONS...Snow accumulation of 8 to 12 inches.

* TIMING...Snow begins Monday evening, becoming heavy at times 
  late Monday night through midday Tuesday. Snow will diminish 
  by late Tuesday afternoon.

* IMPACTS...The heavy snow will make many roads impassable and 
  may produce widespread power outages due to the weight of the 
  snow on tree limbs and power lines. Strong winds will lead to 
  blowing snow, reduced visibility, and additional power 
  outages. 

* WINDS...Northeast 15 to 25 mph with gusts up to 35 mph.

* VISIBILITIES...One quarter mile or less at times.

* TEMPERATURES...In the lower 30s.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for heavy snow means severe winter weather
conditions are expected or occurring.  Significant amounts of
snow are forecast that will make travel dangerous. Only travel in
an emergency. If you must travel...keep an extra flashlight...
food...and water in your vehicle in case of an emergency.

Report snow and ice accumulation to the National Weather Service
by calling our trained spotter line...posting to the NWS Mount
Holly Facebook page...or using Twitter.

Snowfall and ice accumulation forecast maps in addition to
experimental probabilistic snowfall information for the latest
event are available online at www.weather.gov/phi/winter

&&

$$

NJZ023>025-132030-
/O.NEW.KPHI.WW.Y.0010.170314T0000Z-170314T2200Z/
Cape May-Atlantic Coastal Cape May-Coastal Atlantic-
Including the cities of Cape May Court House, Ocean City, 
and Atlantic City
421 AM EDT Mon Mar 13 2017

...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO
6 PM EDT TUESDAY...

The National Weather Service in Mount Holly has issued a Winter
Weather Advisory for snow, which is in effect from 8 PM this 
evening to 6 PM EDT Tuesday.

* LOCATIONS...portions of southeast New Jersey.

* HAZARD TYPES...Snow.

* ACCUMULATIONS...Snow accumulation of 2 to 4 inches.

* TIMING...Snow begins Monday evening, becoming moderate at times
  late Monday night through midday Tuesday. Snow will diminish by
  late Tuesday evening.

* IMPACTS...The snow will lead to slippery roads. Strong winds
  will lead to blowing snow, reduced visibility, and power
  outages.

* WINDS...Northeast 25 to 35 mph with gusts up to 50 mph.

* TEMPERATURES...In the mid 30s.

* VISIBILITIES...One half mile or less at times..

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow...sleet...or
freezing rain will cause travel difficulties. Be prepared for
slippery roads and limited visibilities...and use caution while
driving.

Report Snow and ice accumulation to the National Weather Service
by calling our trained spotter line...posting to the NWS Mount
Holly Facebook page...or using Twitter.

Snowfall and ice accumulation forecast maps in addition to
experimental probabilistic snowfall information for the latest
event are available online at www.weather.gov/phi/winter


&&

$$

DEZ002-MDZ015-019-020-132030-
/O.NEW.KPHI.WW.Y.0010.170314T0000Z-170314T2000Z/
Kent-Queen Annes-Talbot-Caroline-
Including the cities of Dover, Centreville, Easton, and Denton
421 AM EDT Mon Mar 13 2017

...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO
4 PM EDT TUESDAY...

The National Weather Service in Mount Holly has issued a Winter
Weather Advisory for snow, which is in effect from 8 PM this 
evening to 4 PM EDT Tuesday.

* LOCATIONS...Portions of eastern Maryland.

* HAZARD TYPES...Snow

* ACCUMULATIONS...Snow accumulation of 3 to 5 inches.

* TIMING...Snow begins Monday evening, becoming moderate at times
  late Monday night through midday Tuesday. Snow will diminish
  late Tuesday afternoon.

* IMPACTS...The snow will lead to slippery roads. Strong winds
  will lead to blowing snow, reduced visibility, and power
  outages.

* WINDS...Northeast 25 to 35 mph with gusts up to 50 mph.

* TEMPERATURES...In the mid 30s.

* VISIBILITIES...One half mile or less at times..

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow...sleet...or
freezing rain will cause travel difficulties. Be prepared for
slippery roads and limited visibilities...and use caution while
driving.

Report Snow and ice accumulation to the National Weather Service
by calling our trained spotter line...posting to the NWS Mount
Holly Facebook page...or using Twitter.

Snowfall and ice accumulation forecast maps in addition to
experimental probabilistic snowfall information for the latest
event are available online at www.weather.gov/phi/winter

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 10, 7:17 PM ESTSpecial Weather StatementPHIMonmouth28 min
Mar 10, 7:20 PM ESTSpecial Weather StatementPHIMercer25 min
Mar 10, 7:44 PM ESTSpecial Weather StatementPHIMonmouth31 min
Mar 10, 8:00 PM ESTSpecial Weather StatementPHIMercer30 min
Mar 11, 5:41 AM ESTSmall Craft AdvisoryPHI43 hr
Mar 11, 3:33 PM ESTGale WatchPHI24 hr

Nearby

Winter Storm Watches in New Jersey, 2017Winter Storm Watches in Pennsylvania, 2017Winter Storm Watches in Maryland, 2017Every winter storm watch in 2017

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.