Alert archive / New Jersey / Winter Storm Watches in 2018

Winter Storm Watch 5, NWS Philadelphia/Mount Holly

March 5, 20184 states

NWS Philadelphia/Mount Holly issued this winter storm watch at Mar 5, 2018, 3:34 AM EST for 4 states. It took effect at Mar 6, 2018, 7:00 PM EST. It was in force for .

The area

The counties it named.

The facts

Issued
Mar 5, 2018, 3:34 AM EST (08:34 UTC)
In effect from
Mar 6, 2018, 7:00 PM EST
Expired
Mar 6, 2018, 3:40 PM EST
In force
Issued by
NWS Philadelphia/Mount Holly
All 24 counties

New Castle County, DE, Cecil County, MD, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris 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), 74 km from the middle of the area, began a volume at 08:32 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 00:00Z, 8.6 hours before the alert went out and 202 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 00:00Z on 2018-03-05Temperature 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 00:00Z on 2018-03-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 49 square meters per square second.19395878Sfc1 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
1065 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
49 m²/s²
0-3 km storm-relative helicity
88 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

622 
WWUS41 KPHI 050834
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
334 AM EST Mon Mar 5 2018

NJZ001-007>010-PAZ054-055-060>062-103-105-052200-
/O.NEW.KPHI.WS.A.0005.180307T0200Z-180308T0800Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Carbon-Monroe-Berks-
Lehigh-Northampton-Western Montgomery-Upper Bucks-
Including the cities of Newton, Washington, Morristown, 
Flemington, Somerville, Jim Thorpe, Stroudsburg, Reading, 
Allentown, Bethlehem, Easton, Collegeville, Pottstown, Chalfont, 
and Perkasie
334 AM EST Mon Mar 5 2018

...WINTER STORM WATCH IN EFFECT FROM TUESDAY EVENING THROUGH LATE
WEDNESDAY NIGHT...

* WHAT...Heavy snow is possible. There is the potential for up to
  4 to 8 inches of snow, with locally higher amounts.

* WHERE...Portions of eastern Pennsylvania and northern New 
  Jersey.

* WHEN...From Tuesday evening through late Wednesday night.

* ADDITIONAL DETAILS...Plan on difficult travel conditions due to
  snow covered roads and reduced visibility. Heavy wet snow may 
  bring down tree limbs and utility wires, resulting in some power
  outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This Winter Storm Watch means there is potential for significant 
snow that may impact travel. Continue to monitor the forecast for 
updates.

&&

$$

For more information from the National Weather Service visit
www.weather.gov/phi/winter

Iovino
4 follow-up statements
248 
WWUS41 KPHI 052040
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
340 PM EST Mon Mar 5 2018

...A major snowstorm is on the way for portions of our area on 
Wednesday...

.Unfortunately, a major nor'easter will be intensifying rapidly
Wednesday afternoon along the New Jersey coast. It is expected to
produce heavy wet snow for eastern Pennsylvania and portions New 
Jersey Wednesday. Highest amounts should be in the hilly areas. 
While this storm is still in watch phase, we recommend everyone 
with activities in eastern Pennsylvania and New Jersey to have 
contingency plans for altering travel and how to handle possible 
power related impacts. These plans can then be applied once 
warnings are issued, which will express more confidence in this 
oncoming probable very high impact event. Wednesday may be a good
day to just stay home and be safe.


DEZ001-MDZ008-NJZ012-013-015>019-PAZ070-071-101-102-104-106-
061000-
/O.EXB.KPHI.WS.A.0005.180307T0000Z-180308T0800Z/
New Castle-Cecil-Middlesex-Western Monmouth-Mercer-Salem-
Gloucester-Camden-Northwestern Burlington-Delaware-Philadelphia-
Western Chester-Eastern Chester-Eastern Montgomery-Lower Bucks-
Including the cities of Wilmington, Elkton, New Brunswick, 
Freehold, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, 
Moorestown, Mount Holly, Media, Philadelphia, Honey Brook, 
Oxford, West Chester, Kennett Square, Norristown, Lansdale, 
Morrisville, and Doylestown
340 PM EST Mon Mar 5 2018

...WINTER STORM WATCH IN EFFECT FROM TUESDAY EVENING THROUGH LATE
WEDNESDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of 3 to 6
  inches, with localized amounts up to 13 inches possible, 
  especially near and just west of the Interstate 95 corridor and 
  in the hilly areas of southeastern Pennsylvania and northeastern
  New Jersey. 
  
* WHERE...Portions of central, northern and southern New Jersey, 
  southeast Pennsylvania, northeast Maryland and northern 
  Delaware.

* WHEN...From Tuesday evening through late Wednesday night.

* ADDITIONAL DETAILS...Plan on difficult travel conditions at
  times, including during both commutes on Wednesday. Significant
  reductions in visibility are likely. Snow should begin Tuesday
  night with slushy accumulations by dawn Wednesday. There may be
  a brief change to rain during the early morning daylight hours 
  but precipitation should change back to snow by midday and all 
  heavily for several hours during midday and the afternoon with 1
  inch per hour rates. Wind gusts to 45 MPH will be possible in 
  northeastern New Jersey. The snow will be wet and may result in 
  power outages. So while there is still uncertainty, strong 
  consideration should be given to contingency plans should a 
  warning be issued for snow amounts exceeding 5 inches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

NJZ001-007>010-PAZ054-055-060>062-103-105-061000-
/O.EXT.KPHI.WS.A.0005.180307T0000Z-180308T0800Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Carbon-Monroe-Berks-
Lehigh-Northampton-Western Montgomery-Upper Bucks-
Including the cities of Newton, Washington, Morristown, 
Flemington, Somerville, Jim Thorpe, Stroudsburg, Reading, 
Allentown, Bethlehem, Easton, Collegeville, Pottstown, Chalfont, 
and Perkasie
340 PM EST Mon Mar 5 2018

...WINTER STORM WATCH NOW IN EFFECT FROM TUESDAY EVENING THROUGH
LATE WEDNESDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of 10 to 14
  inches are possible, heaviest amounts in the higher elevations.

* WHERE...Portions of northern and northwest New Jersey and east 
  central, northeast and southeast Pennsylvania.

* WHEN...From Tuesday evening through late Wednesday night.

* ADDITIONAL DETAILS...Travel will probably be very difficult to
  impossible, including during the evening commute on Wednesday.
  Significant reductions in visibility are likely. Snow will
  probably accumulate at a rate of 1 to 2 inches per hour for
  several hours, especially during Wednesday afternoon and
  evening. Power outages may develop from newly broken tree limbs
  or from uprooted trees in the softened ground, especially where
  6 inches or more accumulates on the branches. This could become
  a dangerous situation and contingency plans should be developed
  for altering activities as a high impact major snow storm is
  expected Wednesday. If and when warnings are issued, those
  contingency plans can be implemented. We recommend following the
  advice of local officials and this may be a good day to just stay
  home, to ensure safety. 
  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

For more information from the National Weather Service visit
www.weather.gov/phi/winter
842 
WWUS41 KPHI 060837
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
337 AM EST Tue Mar 6 2018

NJZ001-PAZ054-055-062100-
/O.UPG.KPHI.WS.A.0005.180307T0000Z-180308T0800Z/
/O.NEW.KPHI.WS.W.0006.180307T0000Z-180308T0800Z/
Sussex-Carbon-Monroe-
Including the cities of Newton, Jim Thorpe, and Stroudsburg
337 AM EST Tue Mar 6 2018

...WINTER STORM WARNING IN EFFECT FROM 7 PM THIS EVENING TO 3 AM
EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 10 to 
  14 inches are expected.

* WHERE...In New Jersey, Sussex county. In Pennsylvania, Carbon 
  and Monroe counties.

* WHEN...From 7 PM this evening to 3 AM EST Thursday.

* ADDITIONAL DETAILS...Travel will be very difficult to 
  impossible during the evening commute on Wednesday. Be prepared 
  for significant reductions in visibility at times. Snow will 
  probably accumulate at a rate of 1 to 2 inches per hour for 
  several hours, especially during the day Wednesday. With this 
  being a heavy, wet snow, it is likely that trees and power lines
  could be brought down from the weight of the accumulating snow,
  resulting in power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

NJZ007>010-012-015-PAZ060>062-070-071-101>106-062100-
/O.UPG.KPHI.WS.A.0005.180307T0000Z-180308T0800Z/
/O.NEW.KPHI.WS.W.0006.180307T0000Z-180308T0800Z/
Warren-Morris-Hunterdon-Somerset-Middlesex-Mercer-Berks-Lehigh-
Northampton-Delaware-Philadelphia-Western Chester-Eastern Chester-
Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Washington, Morristown, Flemington, 
Somerville, New Brunswick, Trenton, Reading, Allentown, 
Bethlehem, Easton, Media, Philadelphia, Honey Brook, Oxford, 
West Chester, Kennett Square, Collegeville, Pottstown, 
Norristown, Lansdale, Chalfont, Perkasie, Morrisville, 
and Doylestown
337 AM EST Tue Mar 6 2018

...WINTER STORM WARNING IN EFFECT FROM 7 PM THIS EVENING TO 3 AM
EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 7 to 10
  inches, with localized amounts up to 13 inches, are expected,
  especially near and just west of the Interstate 95 corridor and
  in the hilly areas of southeastern Pennsylvania and northeastern
  New Jersey.

* WHERE...Portions of central, northern and northwest New Jersey 
  and east central and southeast Pennsylvania.

* WHEN...From 7 PM this evening to 3 AM EST Thursday.

* ADDITIONAL DETAILS...Travel will be very difficult to
  impossible, including during both commutes on Wednesday. Be
  prepared for significant reductions in visibility. Snow should
  begin tonight with slushy accumulations by dawn Wednesday. There
  may be a period where snow mixes with sleet and rain during the
  day Wednesday, especially right along the Interstate 95
  corridor, but will primary fall as a heavy, wet snow with
  snowfall rates of up to 1 inch per hour. Wind gusts to 35 MPH
  are possible in northeastern New Jersey. With this being a
  heavy, wet snow, it is likely that trees and power lines could
  be brought down from the weight of the accumulating snow,
  resulting in power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

DEZ001-MDZ008-NJZ013-016>019-062100-
/O.CON.KPHI.WS.A.0005.180307T0000Z-180308T0800Z/
New Castle-Cecil-Western Monmouth-Salem-Gloucester-Camden-
Northwestern Burlington-
Including the cities of Wilmington, Elkton, Freehold, Pennsville,
Glassboro, Camden, Cherry Hill, Moorestown, and Mount Holly
337 AM EST Tue Mar 6 2018

...WINTER STORM WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH
LATE WEDNESDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of 1 to 3 
  inches, with localized amounts up to 7 inches, are possible.

* WHERE...Portions of central and southern New Jersey, northeast 
  Maryland and northern Delaware.

* WHEN...From this evening through late Wednesday night.

* ADDITIONAL DETAILS...There is still some uncertainty as to 
  where the rain/snow line will set up Wednesday afternoon, and as
  a result, the Winter Storm Watch remains in effect and has not 
  yet been upgraded to a Winter Storm Warning. This does not mean 
  there will not be impacts from the storm. Plan on difficult 
  travel conditions, including during the evening commute on 
  Wednesday. Significant reductions in visibility are possible. 
  Snow should begin tonight with slushy accumulations by dawn 
  Wednesday. There should be a period where snow mixes with sleet 
  and rain, and may even change to plain rain in some locations on
  Wednesday. However, precipitation will turn back to snow before
  ending. In the heaviest of the snow, snowfall rates will 
  approach 1 inch per hour, and will be a heavy, wet snow. Its is 
  possible for trees and power lines to be brought down by the 
  weight of the accumulating snow, especially for areas where up 
  to 6 inches fall. Wind gusts to 45 MPH will be possible in parts
  of northeastern New Jersey. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

For more information from the National Weather Service visit
www.weather.gov/phi/winter
751 
WWUS41 KPHI 061342
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
842 AM EST Tue Mar 6 2018

NJZ001-PAZ054-055-062300-
/O.CON.KPHI.WS.W.0006.180307T0000Z-180308T0800Z/
Sussex-Carbon-Monroe-
Including the cities of Newton, Jim Thorpe, and Stroudsburg
842 AM EST Tue Mar 6 2018

...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 PM THIS EVENING
TO 3 AM EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 10 to 14 
  inches are expected.

* WHERE...Far northwestern New Jersey and the southern Poconos.

* WHEN...From 7 PM this evening to 3 AM EST Thursday. Light snow
  and light rain will develop late this afternoon and especially
  this evening, then become all snow tonight and continue through
  Wednesday. The snow will be heavy at times especially Wednesday
  afternoon and evening, where rates will be 1 to 2 inches per 
  hour.

* ADDITIONAL DETAILS...Travel will be very difficult to
  impossible, including during the evening commute on Wednesday.
  Be prepared for significant reductions in visibility at times.
  With this being a heavy, wet snow, it is likely that trees and
  power lines could be brought down from the weight of the
  accumulating snow, resulting in power outages. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

NJZ007>010-PAZ060>062-101-103-105-062300-
/O.CON.KPHI.WS.W.0006.180307T0000Z-180308T0800Z/
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, and Perkasie
842 AM EST Tue Mar 6 2018

...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 PM THIS EVENING
TO 3 AM EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 8 to 12
  inches are expected.

* WHERE...Portions of northwestern New Jersey and eastern Pennsylvania.

* WHEN...From 7 PM this evening to 3 AM EST Thursday. Light rain
  and light snow will develop late this afternoon and especially
  this evening, then transition to all snow tonight and continue
  Wednesday. The snow will be heavy at times especially from
  midday Wednesday through Wednesday evening, where rates will be
  1 to 2 inches per hour.

* ADDITIONAL DETAILS...Travel will be very difficult to
  impossible, including during both commutes on Wednesday. Be
  prepared for significant reductions in visibility at times. Wind
  gusts up to 35 mph are possible. With this being a heavy, wet 
  snow, it is likely that trees and power lines could be brought 
  down from the weight of the accumulating snow, resulting in 
  power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

NJZ012-015-PAZ102-104-106-062300-
/O.CON.KPHI.WS.W.0006.180307T0000Z-180308T0800Z/
Middlesex-Mercer-Eastern Chester-Eastern Montgomery-Lower Bucks-
Including the cities of New Brunswick, Trenton, West Chester, 
Kennett Square, Norristown, Lansdale, Morrisville, and Doylestown
842 AM EST Tue Mar 6 2018

...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 PM THIS EVENING
TO 3 AM EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 8
  inches are expected.

* WHERE...Portions of central and northern New Jersey and 
  southeast Pennsylvania.

* WHEN...From 7 PM this evening to 3 AM EST Thursday. Light rain
  and light snow will start late this afternoon and especially
  this evening, then change to mostly snow tonight and continue
  Wednesday. There may be a period where snow mixes with sleet and
  rain during the day Wednesday, especially closer to Interstate
  95, but will primary fall as a heavy, wet snow with snowfall
  rates of up to 1 inch per hour. The heaviest snow should fall
  from midday Wednesday into Wednesday evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during the evening commute on Wednesday. Be prepared
  for significant reductions in visibility at times. Wind gusts up
  to 35 mph are possible. With this being a heavy, wet snow, it 
  is likely that trees and power lines could be brought down from 
  the weight of the accumulating snow, resulting in power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

PAZ070-071-062300-
/O.CON.KPHI.WS.W.0006.180307T0000Z-180308T0800Z/
Delaware-Philadelphia-
Including the cities of Media and Philadelphia
842 AM EST Tue Mar 6 2018

...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 PM THIS EVENING
TO 3 AM EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 6 
  inches are expected.

* WHERE...Far southeastern Pennsylvania.

* WHEN...From 7 PM this evening to 3 AM EST Thursday. Light rain
  and light snow will start late this afternoon and especially
  this evening, then change to mostly snow later tonight and
  continue Wednesday. There may be a period where snow mixes with
  sleet and rain again during the day Wednesday, but will primary
  fall as a heavy, wet snow with snowfall rates of up to 1 inch
  per hour. The heaviest snow should fall from midday Wednesday
  into Wednesday evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during both commutes on Wednesday. Be prepared for 
  significant reductions in visibility at times. Wind gusts to 35 
  mph are possible. With this being a heavy, wet snow, it is 
  likely that trees and power lines could be brought down from the
  weight of the accumulating snow, resulting in power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

DEZ001-MDZ008-NJZ013-016>019-062300-
/O.CON.KPHI.WS.A.0005.180307T0000Z-180308T0800Z/
New Castle-Cecil-Western Monmouth-Salem-Gloucester-Camden-
Northwestern Burlington-
Including the cities of Wilmington, Elkton, Freehold, Pennsville,
Glassboro, Camden, Cherry Hill, Moorestown, and Mount Holly
842 AM EST Tue Mar 6 2018

...WINTER STORM WATCH REMAINS IN EFFECT FROM 7 PM EST THIS
EVENING THROUGH LATE WEDNESDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of 2 to 6
  inches are possible.

* WHERE...Portions of central and southern New Jersey, northeast 
  Maryland and northern Delaware.

* WHEN...From 7 PM EST this evening through late Wednesday night.
  Light rain and light snow should develop late this afternoon and
  especially this evening, then change to all snow late tonight
  and Wednesday. A mix of rain, snow and sleet may occur at times
  during Wednesday. There could be a period of heavy snow
  Wednesday afternoon and evening, with snowfall rates of up to 1
  inch per hour.

* ADDITIONAL DETAILS...There is still some uncertainty as to where
  the rain/snow line will set up Wednesday afternoon, and as a
  result, the Winter Storm Watch remains in effect. This does not
  mean there will not be impacts from the storm. Plan on difficult
  travel conditions, including during the evening commute on
  Wednesday. Significant reductions in visibility are possible. It
  is possible for trees and power lines to be brought down by the
  weight of the wet snow, especially if significant amounts are 
  realized. Wind gusts up to 40 MPH will be possible.
  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

For more information from the National Weather Service visit
www.weather.gov/phi/winter
191 
WWUS41 KPHI 062040
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
340 PM EST Tue Mar 6 2018

...A dangerous wet snow storm will have high impact and potential
for numerous new power outages and some tree damage from eastern 
Pennsylvania into northern New Jersey...

.A compact but powerful nor'easter will skirt the New Jersey 
coast on Wednesday, producing periods of heavy precipitation. All
locations along and west of the Interstate 95 corridor are 
vulnerable to heavy snow, with the greatest uncertainty within 20 
miles either side of Interstate 95. Otherwise, there is very high 
confidence that this storm will make travel difficult or nearly 
impossible at times, across much of eastern Pennsylvania and 
northern New Jersey, basically from near Philadelphia, west and 
north to the New York state border and beyond. Highest snow 
accumulations will be in the hilly areas. Unnecessary travel is 
not recommended Wednesday. Thereafter, communities will need 
Wednesday night and Thursday morning to dig out. Caution is 
advised for those with heart problems as over exertion removing 
wet snow could prompt a heart attack.


NJZ001-PAZ054-055-070930-
/O.EXT.KPHI.WS.W.0006.180307T0300Z-180308T0800Z/
Sussex-Carbon-Monroe-
Including the cities of Newton, Jim Thorpe, and Stroudsburg
340 PM EST Tue Mar 6 2018

...WINTER STORM WARNING NOW IN EFFECT FROM 10 PM THIS EVENING TO
3 AM EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 12 to 
  16 inches are expected.

* WHERE...In New Jersey, Sussex county. In Pennsylvania, Carbon 
  and Monroe counties.

* WHEN...From 10 PM this evening to 3 AM EST Thursday.

* ADDITIONAL DETAILS...Travel will be very difficult to
  impossible, including during the evening commute on Wednesday.
  Be prepared for significant reductions in visibility at times.
  Snowfall rates of nearly 2 inches an hour are expected at times
  from around 11 AM to 7 PM. If the snow is wet and clings to
  trees and wires, then branches would break and power outages
  would result. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

NJZ007>010-PAZ060>062-101-103-105-070930-
/O.EXT.KPHI.WS.W.0006.180307T0300Z-180308T0800Z/
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, and Perkasie
340 PM EST Tue Mar 6 2018

...WINTER STORM WARNING NOW IN EFFECT FROM 10 PM THIS EVENING TO
3 AM EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 10 to 
  14 inches are expected.

* WHERE...Portions of northern and northwest New Jersey and east 
  central and southeast Pennsylvania.

* WHEN...From 10 PM this evening to 3 AM EST Thursday.

* ADDITIONAL DETAILS...Travel will be very difficult to impossible
  at times, including during the evening commute on Wednesday. Be
  prepared for significant reductions in visibility at times. 
  Snowfall rates of nearly 2 inches an hour are expected at times 
  from around 11 AM to 7 PM. Heavy wet snow could result in 
  widespread power outages from breaking branches and possible 
  trees uprooting. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

NJZ012-015-PAZ102-104-106-070930-
/O.EXT.KPHI.WS.W.0006.180307T0300Z-180308T0800Z/
Middlesex-Mercer-Eastern Chester-Eastern Montgomery-Lower Bucks-
Including the cities of New Brunswick, Trenton, West Chester, 
Kennett Square, Norristown, Lansdale, Morrisville, and Doylestown
340 PM EST Tue Mar 6 2018

...WINTER STORM WARNING NOW IN EFFECT FROM 10 PM THIS EVENING TO
3 AM EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 8 
  inches, with localized amounts up to 11 inches, are expected.

* WHERE...Portions of central and northern New Jersey and 
  southeast Pennsylvania.

* WHEN...From 10 PM this evening to 3 AM EST Thursday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during the evening commute on Wednesday. Be prepared
  for significant reductions in visibility at times. Snowfall
  rates of nearly 2 inches an hour are expected at times from
  around 10 AM to 6 PM. Heavy wet snow could result in widespread
  power outages from breaking branches and possible trees 
  uprooting. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

PAZ070-071-070930-
/O.EXT.KPHI.WS.W.0006.180307T0300Z-180308T0800Z/
Delaware-Philadelphia-
Including the cities of Media and Philadelphia
340 PM EST Tue Mar 6 2018

...WINTER STORM WARNING NOW IN EFFECT FROM 10 PM THIS EVENING TO
3 AM EST THURSDAY...

* WHAT...Heavy wet snow is expected. Total snow accumulations of 
  4 to 6 inches, with localized amounts up to 8 inches, are 
  expected.

* WHERE...Delaware and Philadelphia counties.

* WHEN...From 10 PM this evening to 3 AM EST Thursday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, for
  both commutes on Wednesday, especially the evening commute. Be
  prepared for significant reductions in visibility at times.
  There is considerable uncertainty regarding final snowfall
  totals in the Philadelphia area because of the possibility of 
  rain occuring at times during the morning. If this storm ends up
  with 6 to 8 inches of snow, power outages could become 
  numerous.
  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

DEZ001-MDZ008-NJZ013-016>019-070930-
/O.UPG.KPHI.WS.A.0005.180307T0000Z-180308T0800Z/
/O.NEW.KPHI.WW.Y.0012.180307T0300Z-180308T0800Z/
New Castle-Cecil-Western Monmouth-Salem-Gloucester-Camden-
Northwestern Burlington-
Including the cities of Wilmington, Elkton, Freehold, Pennsville,
Glassboro, Camden, Cherry Hill, Moorestown, and Mount Holly
340 PM EST Tue Mar 6 2018

...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO
3 AM EST THURSDAY...

* WHAT...Snow expected. Total snow accumulations of 1 to 3 
  inches, with localized amounts up to 5 inches, are expected.

* WHERE...Portions of central and southern New Jersey, northeast 
  Maryland and northern Delaware.

* WHEN...From 10 PM this evening to 3 AM EST Thursday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the evening commute on Wednesday. Be prepared 
  for reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

For more information from the National Weather Service visit
www.weather.gov/phi/winter

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 5, 3:10 PM ESTCoastal Flood AdvisoryPHIAtlantic, Burlington, Cape May, Middlesex, Monmouth, Ocean12 hr
Mar 5, 4:55 PM ESTGale WatchPHI18 hr

Nearby

Winter Storm Watches in New Jersey, 2018Winter Storm Watches in Pennsylvania, 2018Winter Storm Watches in Delaware, 2018Every winter storm watch in 2018

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.