Alert archive / New Jersey / Winter Weather Advisories in 2018

Winter Weather Advisory 17, NWS Philadelphia/Mount Holly

April 1, 20184 states

NWS Philadelphia/Mount Holly issued this winter weather advisory at Apr 1, 2018, 4:08 AM EDT for 4 states. It took effect at Apr 2, 2018, 12:00 AM EDT. It was in force for 13 hr.

The area

The counties it named.

The facts

Issued
Apr 1, 2018, 4:08 AM EDT (08:08 UTC)
In effect from
Apr 2, 2018, 12:00 AM EDT
Expired
Apr 2, 2018, 1:00 PM EDT
In force
13 hr
Issued by
NWS Philadelphia/Mount Holly
All 25 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, 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), 70 km from the middle of the area, began a volume at 08:11 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, 8.1 hours before the alert went out and 200 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 2018-04-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2018-04-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 181 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2578 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
181 m²/s²
0-3 km storm-relative helicity
198 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

657 
WWUS41 KPHI 010808
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
408 AM EDT Sun Apr 1 2018

...Early Spring Snow Expected Tonight through Monday Morning...

NJZ001-007>010-012>015-PAZ054-055-060>062-103-105-106-012015-
/O.NEW.KPHI.WW.Y.0017.180402T0400Z-180402T1700Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Carbon-Monroe-Berks-
Lehigh-Northampton-Western 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, Collegeville, Pottstown, Chalfont, Perkasie, Morrisville,
and Doylestown
408 AM EDT Sun Apr 1 2018

...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO
1 PM EDT MONDAY...

* WHAT...Snow expected. Total snow accumulations of 3 to 5 inches
  are expected. Up to 6 inches possible in a few spots.

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

* WHEN...From midnight tonight to 1 PM EDT Monday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute on Monday. Expect reduced 
  visibilities at times. High temperatures in the 40s will lead to
  rapid melt during the afternoon and early evening hours on 
  Monday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect 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. Highest accumulations expected on
grassy surfaces.

&&

$$

NJZ019-PAZ070-071-101-102-104-012015-
/O.NEW.KPHI.WW.Y.0017.180402T0400Z-180402T1700Z/
Northwestern Burlington-Delaware-Philadelphia-Western Chester-
Eastern Chester-Eastern Montgomery-
Including the cities of Moorestown, Mount Holly, Media, 
Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, 
Norristown, and Lansdale
408 AM EDT Sun Apr 1 2018

...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO
1 PM EDT MONDAY...

* WHAT...Wet snow expected. Total wet snow accumulations of 2 to 
  4 inches are expected.

* WHERE...Portions of southern New Jersey and southeast 
  Pennsylvania.

* WHEN...From midnight tonight to 1 PM EDT Monday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the morning commute on Monday. Expect reduced
  visibilities at times. Precipitation may start out as rain, but
  will quickly become a wintry mix before changing to all snow.
  Snow then continues through Monday morning. High temperatures 
  in the 40s will lead to rapid melt during the afternoon and 
  early evening hours on Monday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Expect 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. Highest accumulations expected on 
grassy surfaces.

&&

$$

DEZ001-MDZ008-NJZ016>018-020-026-027-012015-
/O.NEW.KPHI.WW.Y.0017.180402T0400Z-180402T1700Z/
New Castle-Cecil-Salem-Gloucester-Camden-Ocean-Coastal Ocean-
Southeastern Burlington-
Including the cities of Wilmington, Elkton, Pennsville, 
Glassboro, Camden, Cherry Hill, Jackson, Long Beach Island, 
and Wharton State Forest
408 AM EDT Sun Apr 1 2018

...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO
1 PM EDT MONDAY...

* WHAT...Wet snow expected. Total wet snow accumulations of up 
  to 2 inches are expected.

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

* WHEN...From midnight tonight to 1 PM EDT Monday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the morning commute on Monday. Expect reduced
  visibilities at times. High temperatures in the 40s will lead 
  to rapid melt during the afternoon and early evening hours on 
  Monday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Expect 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
8 follow-up statements
031 
WWUS41 KPHI 011337
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
937 AM EDT Sun Apr 1 2018

...Early Spring Snowfall Expected late tonight and Monday Morning...

NJZ001-007>010-012>015-PAZ054-055-060>062-103-105-106-020145-
/O.CON.KPHI.WW.Y.0017.180402T0400Z-180402T1700Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Carbon-Monroe-Berks-
Lehigh-Northampton-Western 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, Collegeville, Pottstown, Chalfont, Perkasie, Morrisville,
and Doylestown
937 AM EDT Sun Apr 1 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT
TONIGHT TO 1 PM EDT MONDAY...

* WHAT...Snow expected. Total snow accumulations of 3 to 5 
  inches are expected, with locally 6 inches possible.

* WHERE...Portions of central and northern New Jersey, as well as
  eastern Pennsylvania.

* WHEN...A brief wintry mix in some areas develops and quickly
  changes to snow between about Midnight and 3 AM Monday, then
  snow continues moderate to potentially heavy at times during the
  morning before tapering off around midday. Snowfall rates of 1
  to 2 inches per hour may occur at times between about 4 AM and 
  9 AM Monday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during the Monday morning commute. Expect reduced
  visibilities at times. The snowfall rates will significantly
  affect how much snow accumulates on roadways, as rates at or
  greater than an inch per hour with temperatures near freezing
  will result in untreated roads becoming slushy to snow covered.
  High temperatures Monday afternoon in the 40s will lead to rapid
  melting.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

NJZ019-PAZ070-071-101-102-104-020145-
/O.CON.KPHI.WW.Y.0017.180402T0400Z-180402T1700Z/
Northwestern Burlington-Delaware-Philadelphia-Western Chester-
Eastern Chester-Eastern Montgomery-
Including the cities of Moorestown, Mount Holly, Media, 
Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, 
Norristown, and Lansdale
937 AM EDT Sun Apr 1 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT
TONIGHT TO 1 PM EDT MONDAY...

* WHAT...Wet snow expected. Total wet snow accumulations of 2 to 
  4 inches are expected.

* WHERE...Portions of southern New Jersey and southeast  
  Pennsylvania.

* WHEN...Rain or a wintry mix is expected to develop between
  Midnight and 3 AM Monday then quickly change to wet snow. Wet
  snow will continue Monday morning and become moderate to
  potentially heavy at times, then taper off around midday.
  Snowfall rates of 1 to 2 inches per hour at times may occur 
  between about 5 AM and 10 AM.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the Monday morning commute. Expect reduced visibilities
  at times. The snowfall rates will significantly affect how much
  snow accumulates on roadways, as rates at or greater than an
  inch per hour with temperatures closer to freezing will result
  in untreated roads becoming slushy to snow covered. High 
  temperatures Monday afternoon in the 40s will lead to rapid 
  melting.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

DEZ001-MDZ008-NJZ016>018-020-026-027-020145-
/O.CON.KPHI.WW.Y.0017.180402T0400Z-180402T1700Z/
New Castle-Cecil-Salem-Gloucester-Camden-Ocean-Coastal Ocean-
Southeastern Burlington-
Including the cities of Wilmington, Elkton, Pennsville, 
Glassboro, Camden, Cherry Hill, Jackson, Long Beach Island, 
and Wharton State Forest
937 AM EDT Sun Apr 1 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT
TONIGHT TO 1 PM EDT MONDAY...

* WHAT...Wet snow expected. Total wet snow accumulations of up 
  to 2 inches are expected.

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

* WHEN...Rain or a wintry mix develops between about Midnight and
  3 AM Monday then quickly changes to wet snow. The wet snow
  continues Monday morning before tapering off around midday.
  Snowfall rates of an inch per hour may occur at times between 
  about 5 AM and 10 AM.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the Monday morning commute. Expect reduced visibilities
  at times. The snowfall rates and temperatures will significantly
  affect how much snow accumulates on roadways, as rates at or
  greater than an inch per hour if temperatures drop closer to
  freezing would result in untreated roads becoming slushy to at
  times snow covered. High temperatures Monday afternoon in the 
  40s will lead to rapid melting.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Expect snow covered
roads and limited visibilities, and use caution while driving
especially on bridges and overpasses. 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

Gorse
309 
WWUS41 KPHI 011958
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
358 PM EDT Sun Apr 1 2018

...Early Spring Snowfall Expected late tonight and Monday
Morning...

NJZ001-007>010-012>015-PAZ054-055-060>062-101-103-105-106-020800-
/O.CON.KPHI.WW.Y.0017.180402T0400Z-180402T1700Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Carbon-Monroe-Berks-
Lehigh-Northampton-Western Chester-Western 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, Collegeville, Pottstown, Chalfont, 
Perkasie, Morrisville, and Doylestown
358 PM EDT Sun Apr 1 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT
TONIGHT TO 1 PM EDT MONDAY...

* WHAT...Snow expected. Total snow accumulations of 3 to 5 inches
  are expected. Isolated amounts of 6 inches possible.

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

* WHEN...A brief wintry mix in some areas develops and quickly
  changes to snow between about Midnight and 3 AM Monday, then
  snow continues moderate to potentially heavy at times during the
  morning before tapering off around midday. Snowfall rates of 1
  to 2 inches per hour may occur at times between about 4 AM and 
  9 AM Monday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute on Monday. Expect reduced 
  visibilities at times. The snowfall rates will significantly
  affect how much snow accumulates on roadways, as rates at or
  greater than an inch per hour with temperatures near freezing
  will result in untreated roads becoming slushy to snow covered.
  High temperatures Monday afternoon in the 40s will lead to rapid
  melting.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect 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.

&&

$$

NJZ019-PAZ070-071-102-104-020800-
/O.CON.KPHI.WW.Y.0017.180402T0400Z-180402T1700Z/
Northwestern Burlington-Delaware-Philadelphia-Eastern Chester-
Eastern Montgomery-
Including the cities of Moorestown, Mount Holly, Media, 
Philadelphia, West Chester, Kennett Square, Norristown, 
and Lansdale
358 PM EDT Sun Apr 1 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT
TONIGHT TO 1 PM EDT MONDAY...

* WHAT...Wet snow expected. Total wet snow accumulations of 1 to 
  3 inches are expected.

* WHERE...Portions of southern New Jersey and southeast 
  Pennsylvania.

* WHEN...Rain or a wintry mix is expected to develop between
  Midnight and 3 AM Monday then quickly change to wet snow. Wet
  snow will continue Monday morning and become moderate to
  potentially heavy at times, then taper off around midday.
  Snowfall rates of 1 to 2 inches per hour at times may occur 
  between about 5 AM and 10 AM.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the morning commute on Monday. Expect reduced 
  visibilities at times. The snowfall rates will significantly
  affect how much snow accumulates on roadways, as rates at or
  greater than an inch per hour with temperatures near freezing
  will result in untreated roads becoming slushy to snow covered.
  High temperatures Monday afternoon in the 40s will lead to rapid
  melting.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Expect 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.

&&

$$

DEZ001-MDZ008-NJZ016>018-020-026-027-020800-
/O.CON.KPHI.WW.Y.0017.180402T0400Z-180402T1700Z/
New Castle-Cecil-Salem-Gloucester-Camden-Ocean-Coastal Ocean-
Southeastern Burlington-
Including the cities of Wilmington, Elkton, Pennsville, 
Glassboro, Camden, Cherry Hill, Jackson, Long Beach Island, 
and Wharton State Forest
358 PM EDT Sun Apr 1 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT
TONIGHT TO 1 PM EDT MONDAY...

* WHAT...Wet snow expected. Total wet snow accumulations of up 
  to 2 inches are expected.

* WHERE...Rain or a wintry mix develops between about Midnight and
  3 AM Monday then quickly changes to wet snow. The wet snow
  continues Monday morning before tapering off around midday.
  Snowfall rates of an inch per hour may occur at times between
  about 5 AM and 10 AM.

* WHEN...From midnight tonight to 1 PM EDT Monday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the morning commute on Monday. Expect reduced
  visibilities at times. The snowfall rates and temperatures will
  significantly affect how much snow accumulates on roadways, as
  rates at or greater than an inch per hour if temperatures drop
  closer to freezing would result in untreated roads becoming
  slushy to at times snow covered. High temperatures Monday
  afternoon in the 40s will lead to rapid melting.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Expect 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
963 
WWUS41 KPHI 020103
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
903 PM EDT Sun Apr 1 2018

...A quick-hitting snow event to impact the Monday morning commute...

NJZ001-007>010-012>015-PAZ054-055-060>062-101-103-105-106-021315-
/O.CON.KPHI.WW.Y.0017.180402T0400Z-180402T1700Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Carbon-Monroe-Berks-
Lehigh-Northampton-Western Chester-Western 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, Collegeville, Pottstown, Chalfont, 
Perkasie, Morrisville, and Doylestown
903 PM EDT Sun Apr 1 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT
TONIGHT TO 1 PM EDT MONDAY...

* WHAT...Snow expected. Total snow accumulations of 3 to 5 inches
  with isolated amounts of 6 inches possible in the higher
  elevations of northeastern Pennsylvania and northwestern New 
  Jersey.

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

* WHEN...Precipitation overspreading the area from west to east
  between 2 AM and 4 AM will begin as snow in the higher
  elevations of northeastern Pennsylvania and northwestern New
  Jersey. Elsewhere, precipitation will begin as rain or a
  rain/snow mix but transition to wet snow from northwest to
  southeast between 3 AM and 6 AM. The snow will be heavy at 
  times with snowfall rates of 1 to 2 inches per hour between 
  about 4 AM and 9 AM. The snow tapers off from west to east 
  between 9 AM and 11 AM Monday morning.

* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during the morning commute on Monday. Expect poor
  visibilities below one-half mile at times in heavy snow. Road
  conditions will be highly dependent on snowfall rates and
  elevation as rates greater than 1 inch per hour and slightly
  colder temperatures in the hilly terrain will allow for 
  untreated roads to become snow covered. High temperatures Monday
  afternoon in the 40s will lead to rapid melting.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect 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.

&&

$$

NJZ019-PAZ070-071-102-104-021315-
/O.CON.KPHI.WW.Y.0017.180402T0400Z-180402T1700Z/
Northwestern Burlington-Delaware-Philadelphia-Eastern Chester-
Eastern Montgomery-
Including the cities of Moorestown, Mount Holly, Media, 
Philadelphia, West Chester, Kennett Square, Norristown, 
and Lansdale
903 PM EDT Sun Apr 1 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT
TONIGHT TO 1 PM EDT MONDAY...

* WHAT...Wet snow expected. Total snow accumulations of 1 to 3 
  inches with the highest amounts generally north and west of 
  Center City, Philadelphia.

* WHERE...Portions of southwestern New Jersey and southeastern 
  Pennsylvania.

* WHEN...Rain, possibly mixing in with snow, will overspread the
  area from west to east between 2 AM and 4 AM, then transition to
  a heavy wet snow from northwest to southeast between 4 AM and 6
  AM. There is a potential for sleet to mix in across the southern
  and eastern suburbs of Philadelphia. Otherwise, the snow will be
  moderate to heavy with snowfall rates of around 1 inch per hour
  possible at times between about 5 AM and 8 AM. The snow tapers
  off from west to east between 9 AM and 11 AM Monday morning.

* ADDITIONAL DETAILS...Plan on travel delays for the morning
  commute with poor visibility below one-half mile at times in
  bursts of heavy snow. Road conditions will be highly dependent
  on snowfall rates as rates greater than 1 inch per hour could
  allow for a slushy accumulation on untreated secondary roads. 
  High temperatures Monday afternoon in the 40s will lead to rapid
  melting.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Expect 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.

&&

$$

DEZ001-MDZ008-NJZ016>018-020-026-027-021315-
/O.CON.KPHI.WW.Y.0017.180402T0400Z-180402T1700Z/
New Castle-Cecil-Salem-Gloucester-Camden-Ocean-Coastal Ocean-
Southeastern Burlington-
Including the cities of Wilmington, Elkton, Pennsville, 
Glassboro, Camden, Cherry Hill, Jackson, Long Beach Island, 
and Wharton State Forest
903 PM EDT Sun Apr 1 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT
TONIGHT TO 1 PM EDT MONDAY...

* WHAT...Wet snow and sleet expected. Total snow and sleet
  accumulations around 1 inch with isolated higher amounts up to 2
  inches possible.

* WHERE...Far northeastern Maryland and northern Delaware and
  portions of southern New Jersey.

* WHEN...Rain will overspread the area between 2 AM and 5 AM, then
  transition to a mix of sleet and wet snow from west to east
  between 5 AM and 8 AM. The snow will be moderate to heavy at
  times with snowfall rates of up to 1 inch per hour possible
  briefly between about 6 AM and 9 AM. The snow tapers off from 
  west to east between 9 AM and 11 AM Monday morning.

* ADDITIONAL DETAILS...Plan on travel delays for the morning
  commute with poor visibility of one-half mile or less at times
  in bursts of heavier snow. Road conditions will be highly
  dependent on precipitation rates as snowfall rates greater than
  1 inch per hour and steadier sleet could allow for a slushy
  accumulation on untreated secondary roads. High temperatures
  Monday afternoon in the 40s will lead to rapid melting.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
and sleet will cause primarily travel difficulties. Expect 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

Klein
640 
WWUS41 KPHI 020747
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
347 AM EDT Mon Apr 2 2018

...A quick-hitting snow event to impact the morning commute...

NJZ001-007>010-012>015-PAZ054-055-060>062-101-103-105-106-021700-
/O.CON.KPHI.WW.Y.0017.000000T0000Z-180402T1700Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Carbon-Monroe-Berks-
Lehigh-Northampton-Western Chester-Western 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, Collegeville, Pottstown, Chalfont, 
Perkasie, Morrisville, and Doylestown
347 AM EDT Mon Apr 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...

* WHAT...Snow occurring. Additional snow accumulations of 3 to 5
  inches, with isolated amounts of 6 inches in the higher 
  elevations of the southern Poconos and northwest New Jersey, are
  expected.

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

* WHEN...Snow has begun in the southern Poconos, far northern New
  Jersey, and portions of the Lehigh Valley. Rain will spread into
  the rest of the area by 5 am before quickly changing to snow. 
  Snow will become moderate to heavy at times through the morning 
  commute before tapering off late this morning.

* ADDITIONAL DETAILS...Plan on very difficult travel conditions,
  including during this morning's commute. Expect poor 
  visibilities below one-half mile at times in heavy snow. Road 
  conditions will be highly dependent on snowfall rates and 
  elevation as rates greater than one inch per hour and slightly 
  colder temperatures in the hilly terrain will allow for 
  untreated roads to become snow covered. High temperatures this 
  afternoon in the 40s will lead to rapid melting.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect 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.

&&

$$

NJZ019-PAZ070-071-102-104-021700-
/O.CON.KPHI.WW.Y.0017.000000T0000Z-180402T1700Z/
Northwestern Burlington-Delaware-Philadelphia-Eastern Chester-
Eastern Montgomery-
Including the cities of Moorestown, Mount Holly, Media, 
Philadelphia, West Chester, Kennett Square, Norristown, 
and Lansdale
347 AM EDT Mon Apr 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...

* WHAT...Wet snow expected. Additional wet snow accumulations of 
  up to 2 inches are expected.

* WHERE...Portions of southern New Jersey and southeast 
  Pennsylvania.

* WHEN...Rain will spread across the area through 5 am before
  transitioning to a wintry mix or all snow during the morning
  commute. Snow may become moderate to heavy at times before
  tapering off in the late morning hours.

* ADDITIONAL DETAILS...Plan on travel delays for the morning
  commute, with poor visibility below one-half mile at times in
  bursts of heavy snow. Road conditions will be highly dependent
  on snowfall rates as rates greater than one inch per hour could
  allow for a slushy accumulation on untreated secondary roads.
  High temperatures this afternoon in the 40s will lead to rapid 
  melting.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Expect 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.

&&

$$

DEZ001-MDZ008-NJZ016>018-020-026-027-021700-
/O.CON.KPHI.WW.Y.0017.000000T0000Z-180402T1700Z/
New Castle-Cecil-Salem-Gloucester-Camden-Ocean-Coastal Ocean-
Southeastern Burlington-
Including the cities of Wilmington, Elkton, Pennsville, 
Glassboro, Camden, Cherry Hill, Jackson, Long Beach Island, 
and Wharton State Forest
347 AM EDT Mon Apr 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...

* WHAT...Wet snow and sleet expected. Additional wet snow 
  accumulations of up to two inches are expected.

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

* WHEN...Rain will overspread the area through 5 am before
  transitioning to a wintry mix during the morning commute. Bursts
  of heavier sleet and snow may occur between 5 am and 9 am before
  tapering off late this morning.

* ADDITIONAL DETAILS...Plan on travel delays for the morning
  commute, with poor visibility of one-half mile or less at times
  in bursts of heavier sleet and snow. Road conditions will be
  highly dependent on precipitation rates and precipitation type,
  as snowfall rates greater than one inch per hour and steadier 
  sleet could allow for a slushy accumulation on untreated 
  secondary roads. High temperatures this afternoon in the 40s 
  will lead to rapid melting.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Expect 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

CMS
062 
WWUS41 KPHI 020941
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
541 AM EDT Mon Apr 2 2018

...A quick-hitting snow event to impact the morning commute...

DEZ001-MDZ008-NJZ016-021045-
/O.CAN.KPHI.WW.Y.0017.000000T0000Z-180402T1700Z/
New Castle-Cecil-Salem-
Including the cities of Wilmington, Elkton, and Pennsville
541 AM EDT Mon Apr 2 2018

...WINTER WEATHER ADVISORY IS CANCELLED...

Although precipitation may switch over to a wintry mix for a time
this morning, impacts to travel are expected to be minor.
Therefore, the winter weather advisory has been cancelled.

$$

NJZ001-007>010-012>015-PAZ054-055-060>062-101-103-105-106-021700-
/O.CON.KPHI.WW.Y.0017.000000T0000Z-180402T1700Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Carbon-Monroe-Berks-
Lehigh-Northampton-Western Chester-Western 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, Collegeville, Pottstown, Chalfont, 
Perkasie, Morrisville, and Doylestown
541 AM EDT Mon Apr 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...

* WHAT...Snow occurring. Additional snow accumulations of 3 to 5
  inches are expected, with locally higher totals in the higher
  elevations of the southern Poconos and northwest New Jersey.

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

* WHEN...Snow is now occurring in most of the advisory area, with
  any remaining rain expected to change over by 6 am. A band of
  heavy snow has developed in much of the Lehigh Valley
  northeastward into northern New Jersey, with more heavy snow
  likely to occur in the southern Poconos in the next couple of
  hours. Snow will remain moderate to heavy at times through the
  morning commute before tapering off late this morning.

* ADDITIONAL DETAILS...Plan on very difficult travel conditions,
  including during this morning's commute. Expect poor 
  visibilities below one-half mile at times in heavy snow. Road 
  conditions will be highly dependent on snowfall rates and 
  elevation as rates greater than one inch per hour and slightly 
  colder temperatures in the hilly terrain will allow for 
  untreated roads to become snow covered. High temperatures this 
  afternoon in the 40s will lead to rapid melting.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect 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.

&&

$$

NJZ019-PAZ070-071-102-104-021700-
/O.CON.KPHI.WW.Y.0017.000000T0000Z-180402T1700Z/
Northwestern Burlington-Delaware-Philadelphia-Eastern Chester-
Eastern Montgomery-
Including the cities of Moorestown, Mount Holly, Media, 
Philadelphia, West Chester, Kennett Square, Norristown, 
and Lansdale
541 AM EDT Mon Apr 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...

* WHAT...A wintry mix expected. Additional wet snow accumulations
  of up to 2 inches are expected.

* WHERE...Portions of southern New Jersey and southeast 
  Pennsylvania.

* WHEN...Rain will transition to a wintry mix of sleet and wet
  snow during the morning commute. Burst of heavier sleet and snow
  may occur between now and 10 am before tapering off late this
  morning.

* ADDITIONAL DETAILS...Plan on travel delays for the morning
  commute, with poor visibility below one-half mile at times in
  bursts of heavy snow. Road conditions will be highly dependent
  on snowfall rates as rates near one inch per hour could allow 
  for a slushy accumulation on untreated secondary roads. High 
  temperatures this afternoon in the 40s will lead to rapid 
  melting.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Expect 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.

&&

$$

NJZ017-018-020-026-027-021700-
/O.CON.KPHI.WW.Y.0017.000000T0000Z-180402T1700Z/
Gloucester-Camden-Ocean-Coastal Ocean-Southeastern Burlington-
Including the cities of Glassboro, Camden, Cherry Hill, Jackson, 
Long Beach Island, and Wharton State Forest
541 AM EDT Mon Apr 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...

* WHAT...A wintry mix expected. Additional wet snow accumulations
  of up to two inches are expected.

* WHERE...Portions of southern New Jersey.

* WHEN...Rain will mix with snow and sleet at times this morning.
  Heavier bursts of sleet and snow may quickly accumulate on
  grassy surfaces, but little accumulation is expected on
  pavement. Precipitation should taper off by midday.

* ADDITIONAL DETAILS...Plan on travel delays for the morning
  commute, with poor visibility of one-half mile or less at times
  in bursts of heavier sleet and snow. Road conditions are
  expected to be mostly wet. However, if heavier bursts of sleet
  and snow occur, slushy accumulations may occur on untreated
  roads. High temperatures this afternoon in the 40s will lead to
  rapid melting.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Expect 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

CMS
682 
WWUS41 KPHI 021338
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
938 AM EDT Mon Apr 2 2018



PAZ060-101-021445-
/O.CAN.KPHI.WW.Y.0017.000000T0000Z-180402T1700Z/
Berks-Western Chester-
Including the cities of Reading, Honey Brook, and Oxford
938 AM EDT Mon Apr 2 2018

...WINTER WEATHER ADVISORY IS CANCELLED...

Snow has ended across the area so the advisory has been cancelled. 

$$

NJZ001-007>010-012>015-PAZ054-055-061-062-103-105-106-021700-
/O.CON.KPHI.WW.Y.0017.000000T0000Z-180402T1700Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Carbon-Monroe-Lehigh-
Northampton-Western Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Newton, Washington, Morristown, 
Flemington, Somerville, New Brunswick, Freehold, Sandy Hook, 
Trenton, Jim Thorpe, Stroudsburg, Allentown, Bethlehem, Easton, 
Collegeville, Pottstown, Chalfont, Perkasie, Morrisville, 
and Doylestown
938 AM EDT Mon Apr 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...

* WHAT...Snow. Additional snow accumulations of up to an inch. 

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

* WHEN...Until 1 PM EDT this afternoon.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the morning commute. Expect reduced 
  visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect 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.

&&

$$

NJZ019-PAZ104-021700-
/O.CON.KPHI.WW.Y.0017.000000T0000Z-180402T1700Z/
Northwestern Burlington-Eastern Montgomery-
Including the cities of Moorestown, Mount Holly, Norristown, 
and Lansdale
938 AM EDT Mon Apr 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...

* WHAT...Wet snow. Additional wet snow accumulations of up to 
  one inch are expected.

* WHERE...In New Jersey, Northwestern Burlington county. In 
  Pennsylvania, Eastern Montgomery county.

* WHEN...Until 1 PM EDT this afternoon.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the morning commute. Expect reduced 
  visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Expect 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.

&&

$$

NJZ020-026-027-021700-
/O.CON.KPHI.WW.Y.0017.000000T0000Z-180402T1700Z/
Ocean-Coastal Ocean-Southeastern Burlington-
Including the cities of Jackson, Long Beach Island, 
and Wharton State Forest
938 AM EDT Mon Apr 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...

* WHAT...Snow, mixed at times with rain. Additional wet snow
  accumulations of up to one inch are expected.

* WHERE...Ocean, Coastal Ocean and Southeastern Burlington 
  counties.

* WHEN...Until 1 PM EDT this afternoon.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the morning commute. Expect reduced 
  visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
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
347 
WWUS41 KPHI 021402
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
1002 AM EDT Mon Apr 2 2018



PAZ054-055-061-062-103>106-021515-
/O.CAN.KPHI.WW.Y.0017.000000T0000Z-180402T1700Z/
Carbon-Monroe-Lehigh-Northampton-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Jim Thorpe, Stroudsburg, Allentown, 
Bethlehem, Easton, Collegeville, Pottstown, Norristown, Lansdale,
Chalfont, Perkasie, Morrisville, and Doylestown
1002 AM EDT Mon Apr 2 2018

...WINTER WEATHER ADVISORY IS CANCELLED...

Snow has ended so the advisory has been cancelled. 


$$

NJZ001-007>010-012>015-021700-
/O.CON.KPHI.WW.Y.0017.000000T0000Z-180402T1700Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-
Including the cities of Newton, Washington, Morristown, 
Flemington, Somerville, New Brunswick, Freehold, Sandy Hook, 
and Trenton
1002 AM EDT Mon Apr 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...

* WHAT...Wet snow. Additional wet snow accumulations of up to one
  inch. 

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

* WHEN...Snow will taper off west to east by early this afternoon. 



PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Expect 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.

&&

$$

NJZ019-021700-
/O.CON.KPHI.WW.Y.0017.000000T0000Z-180402T1700Z/
Northwestern Burlington-
Including the cities of Moorestown and Mount Holly
1002 AM EDT Mon Apr 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...

* WHAT...Wet snow. Additional wet snow accumulations of up to 
 a half inch are expected.  

* WHERE...Northwestern Burlington county.

* WHEN...Snow will quickly come to an end west to east by early 
  this afternoon. 



PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Expect 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.

&&

$$

NJZ020-026-027-021700-
/O.CON.KPHI.WW.Y.0017.000000T0000Z-180402T1700Z/
Ocean-Coastal Ocean-Southeastern Burlington-
Including the cities of Jackson, Long Beach Island, 
and Wharton State Forest
1002 AM EDT Mon Apr 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...

* WHAT...Snow, mixed at times with rain. Additional wet snow
  accumulations of up to one inch are expected.

* WHERE...Ocean, Coastal Ocean and Southeastern Burlington 
  counties.

* WHEN...Snow will quickly come to an end west to east by early 
  this afternoon. 



PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
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
840 
WWUS41 KPHI 021512
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
1112 AM EDT Mon Apr 2 2018



NJZ001-007>010-012>015-019-020-026-027-021615-
/O.CAN.KPHI.WW.Y.0017.000000T0000Z-180402T1700Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Northwestern Burlington-
Ocean-Coastal Ocean-Southeastern Burlington-
Including the cities of Newton, Washington, Morristown, 
Flemington, Somerville, New Brunswick, Freehold, Sandy Hook, 
Trenton, Moorestown, Mount Holly, Jackson, Long Beach Island, 
and Wharton State Forest
1112 AM EDT Mon Apr 2 2018

...WINTER WEATHER ADVISORY IS CANCELLED...

Snow has ended so the advisory has been cancelled. 

$$

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

What forecasters said that day

The local office's own words before this winter weather 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 winter weather advisory went out at Mar 31, 9:25 PM EDT, 6 hours 43 minutes earlier.

Area forecast discussion, Mar 31, 9:25 PM EDT, 6 hours 43 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
925 PM EDT Sat Mar 31 2018

.SYNOPSIS...
A weak cold front will move into the region tomorrow morning, before
stalling just south of the region by Monday morning. A surface low
will propagate east along the front Sunday night into Monday
morning. A storm system will slowly progress through the region for
the mid-week period, pushing a warm front north on Tuesday followed
by a strong cold front late Wednesday. High pressure then briefly
passes through the region late in the new week.

&&

.NEAR TERM /UNTIL 6 AM SUNDAY MORNING/...
930 pm update: Aside from some minor changes to hourly
temperatures and dew points to account for trends in
observations this evening, forecast is in good shape. Made no
significant changes at this time.

Previous discussion...

A nice afternoon in progress (for most) as surface high pressure
continues to shift off the Mid-Atlantic coast, allowing for a
southerly flow to occur. This southerly wind component though is a
bit gusty especially along the coast and this is resulting in
much cooler temperatures there.

As we go through tonight, an upper-level trough is forecast to slide
eastward across the Great Lakes and adjacent areas of Canada. This
will drive surface low pressure well to our north, however the
attached cold front will arrive into our western areas toward
daybreak. There is some warm air advection ahead of this front,
however the strongest short wave energy is well to our north as is
the main lift. The airmass moistens some, however it looks to not be
all that robust despite a 40-50 knot southwesterly low-level jet
arriving later tonight. There is a short wave embedded in the
southwest flow and timed near the low-level jet, however not sure
how much lift can result in actual showers. We continued with some
lower chance PoPs for showers across the west/northwest zones late
tonight, with a mention of sprinkles into the I-95 corridor toward
daybreak. Despite the lower dew points up across the Poconos
especially, light intensity of the precipitation may result in just
some light rain showers or sprinkles (if it were to precipitate to
the surface).

Otherwise, clouds increase and gradually lower from west to east
through the night. This along with some southerly flow occurring
(low-level jets arrival overnight) should keep temperatures from
dropping real fast through the evening. Hourly temperatures and low
temperatures are a multi-model and continuity blend.

&&

.SHORT TERM /6 AM SUNDAY MORNING THROUGH 6 PM SUNDAY/...
930 pm update: I increased temperatures a little bit in the
southeast half of the CWA based on latest hi-res and statistical
output. Front may struggle to move through the area, and
boundary-layer mixing may be sufficient to increase
temperatures more than previously progged.

Previous discussion...

As an upper-level trough amplifies some from the Great Lakes,
adjacent Canada and the Northeast, a surface cold front will
gradually settle south and east across our region. This may not
clear our far eastern and southern areas until later in the day or
it may start to dissipate as it will be weakening to begin with.
Looks like limited moisture with the front and the low-level jet
will be shifting offshore early, thus there does not appear to be
much in the way of forcing for organized ascent with it. As a
result, we carried a mention of possible sprinkles for a time
through mid morning from northwest to southeast.

Cloud cover to start the day across much of the region should
scatter out some from northwest to southeast as some drying starts
to work in. Temperatures are a blend of mostly the 2-meter
temperatures of several models as well as continuity. This places
higher maximum temperatures in the coastal plain and Delmarva where
boundary layer warmth should be maximized ahead of the weak cold
front. A wind shift to the west-northwest will occur behind the
weakening surface cold front with some increase especially late
morning through the afternoon.

&&

.LONG TERM /SUNDAY NIGHT THROUGH SATURDAY/...
Overview...Three main periods of potential active weather in the
long term. First, there is the potential for accumulating snow of a
few inches, across much of the area Sunday night into Monday morning
as a low propagates east along a slow moving front. Tuesday into
Wednesday, the region is likely to see two rounds of precipitation,
mostly rain, as first a warm front lifts through our region Tuesday
morning, with a cold front expected Wednesday morning. Finally late
in the week, Friday night into Saturday, there is a chance for a
fast moving clipper system to dig far enough south to bring
precipitation to our region.

Temperatures...aside from a 24 to 36 hour period Tuesday into
Wednesday when our region will be in the warm sector, temperatures
through the rest of the long term period look to be below normal.

Sunday night and Monday...A low will be tracking along the very slow
moving front. Depending on the model, this front is forecast to be
either south of our region (as the GFS depicts) or in Delmarva, and
far southeastern NJ (as depicted in the NAM). Placement of this
front will be key to not only precipitation types, but snow amounts
as well (snow ratios especially south of the I78 corridor could be
very low on the order of 5:1). North of the front, many models
depict an area of strong frontogenesis in the 09 to 15Z time frame,
resulting in a window when mesoscale snow banding will be possible.
The low however, is not expected to intensify or deepen until it
propagates east of the area. While it is not an especially impressive
low on the height fields at standard pressure levels, looking at the
1.5PV surface (dynamic tropopause), there appears to be strong
positive pressure advection during the period. Snow amount forecast
hasn't changed significantly, with generally 2 to 4 inches north and
west of the fall line, 1 to 2 in the I95 corridor, quickly dropping
below an inch south and east of I-95. If models trend closer to the
NAM solution with stronger frontogenesis, the snow amounts may need
to be increased along and north of the I78 corridor, while south of
a Philly to Atlantic City line, this scenario would mean less snow,
but more rain.

Tuesday and Wednesday...complex low pressure system is forecast to
propagate from the upper Mississippi Valley into New England. As it
does so, the associated warm front is expected to arrive in our
region Tuesday morning. The first round of precipitation (should be
mostly rain except in the Poconos and NW NJ) will arrive ahead of
and continue with the passage of the warm front. After that, it
looks like our region will be in the prime location for the dry
slot, if it develops, bringing at least several hours lull in
precipitation (and a dramatic warming trend), before a second round
of rain (all rain across the region) arrives with the approaching
cold front Wednesday. Given the low level warm air advection we are
expecting in the warm sector, should have enough instability for
thunderstorms with this round as well.

Thursday...surface high builds in bringing a brief opportunity for
tranquil weather.

Friday and Saturday...A clipper system digs southeast out of
southern Canada. It could dig far enough south to bring another
round of precipitation across our region, but there is considerable
uncertainty with the track of the low.

&&

.AVIATION /02Z SUNDAY THROUGH THURSDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

Tonight...VFR with CIGs developing/lowering in the next few
hours as a cold front approaches the area. May see some showers
near/northwest of RDG/ABE late tonight (perhaps a sprinkle
elsewhere). CIGs drop to around 5000 feet in proximity to the
front. Winds south to southwest 5 to 15 kts, with some
occasional gusts to 20 kts or so, especially this evening.
Directions will slowly transition to more westerly with time.
Moderate confidence.

Sunday...Generally VFR with CIGs 4000-7000 feet for most of the
day before some potential for scattering out and cloud bases
rising during the mid to late afternoon. May see a few sprinkles
or even a couple showers in the morning, but not expecting
impacts to aviation. Winds becoming west to northwest 10 to 15
kts with gusts to 20 kts or so possible as the cold front moves
across the area. Moderate confidence.

Outlook...
Sunday night and Monday...MVFR/IFR conditions in rain and snow.
Runway accumulations are possible especially for KRDG, KABE, and
KTTN. Snow tapers off Monday morning, and VFR conditions return
by Monday afternoon. North winds less than 10 kt. Moderate
confidence.

Monday night and Tuesday...Conditions lowering to MVFR or IFR
late Monday night in rain. May see conditions raise to VFR by
Tuesday morning. Winds shift to southerly behind a warm front.
Moderate confidence.

Tuesday night and Wednesday..Conditions lowering to MVFR or IFR,
with possibly some low clouds late Tuesday night, then a round
of showers, and possibly thunderstorms on Wednesday. Expect an
abrupt shift to northwesterly winds on Wednesday. Low
confidence.

Thursday...VFR conditions expected. High confidence.

&&

.MARINE...
South to southwesterly flow will increase through tonight as a low-
level jet arrives, however mixing should be limited to some extent.
This will also boost the seas especially on the ocean where gusts
later tonight should be in the 25-30 knot range (highest across the
northern Atlantic coastal waters). A Small Craft Advisory remains in
effect from late this evening through late Sunday afternoon. Given a
more cross the bay direction, opted to not issue a Small Craft
Advisory for Delaware Bay and go with winds of 20 knots or less. The
winds will diminish during Sunday (especially afternoon) as they
start to shift from the west or west-northwest.

Outlook...
Sunday night and Monday...SCA conditions develop late Sunday
night through Monday afternoon, then conditions subside to sub-
SCA levels late Monday.

Tuesday through Thursday...SCA conditions late Tuesday and
continue through the period. There is a slight chance for gale
gusts especially Tuesday night and Wednesday morning.

&&

.CLIMATE...
With a cold and snowy March 2018 just about over, we have some
preliminary climate numbers to show just how unusual this month
has been. Keep in mind, these numbers are through March 29, but
no snow fell on March 30, and accumulating snow is not expected
prior to midnight tonight.

Regarding snowfall: March 2018 is in the Top 5 snowiest Marches
for all of our 4 snowfall climate sites.

Allentown: 20.7" is the 4th snowiest March on record.

Atlantic City: 9.6" is the is the 5th snowiest March on record.

Philadelphia: 15.2" is a tie with March 1914 as the 2nd
snowiest March on record.

Wilmington: 14.2" is the 2nd snowiest March on record.

In terms of average temperatures, although it has been
generally below normal, it does not rank as one of the Top 10
coldest Marches on record. The first day of March and the last
couple of days, in addition to what should happen today, will
keep us out of that distinction.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...None.
NJ...None.
DE...None.
MD...None.
MARINE...Small Craft Advisory until 6 PM EDT Sunday for ANZ450>455.

&&

Synopsis...Johnson
Near Term...CMS/Gorse
Short Term...CMS/Gorse
Long Term...Johnson
Aviation...CMS/Johnson
Marine...Gorse/Johnson
Climate...MPS
Hazardous weather outlook, Apr 1, 3:50 AM EDT, 18 minutes before
Hazardous Weather Outlook
National Weather Service Mount Holly NJ
350 AM EDT Sun Apr 1 2018

DEZ001-MDZ008-NJZ001-007>010-012>020-026-027-PAZ054-055-060>062-070-
071-101>106-020800-
New Castle-Cecil-Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Salem-Gloucester-Camden-
Northwestern Burlington-Ocean-Coastal Ocean-Southeastern Burlington-
Carbon-Monroe-Berks-Lehigh-Northampton-Delaware-Philadelphia-
Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
350 AM EDT Sun Apr 1 2018

...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM
EDT MONDAY...

This Hazardous Weather Outlook is for northern Delaware, northeast
Maryland, central New Jersey, northern New Jersey, northwest New
Jersey, southern New Jersey, east central Pennsylvania, northeast
Pennsylvania and southeast Pennsylvania.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Winter Weather Advisory.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Winter Weather Advisory.

Widespread accumulating snow late Sunday night through Monday
morning will result in hazardous travel for the Monday morning
commute.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

DEZ002>004-MDZ012-015-019-020-NJZ021>025-020800-
Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-Talbot-
Caroline-Cumberland-Atlantic-Cape May-Atlantic Coastal Cape May-
Coastal Atlantic-
350 AM EDT Sun Apr 1 2018

This Hazardous Weather Outlook is for central Delaware, southern
Delaware, northeast Maryland and southern New Jersey.

.DAY ONE...Today and Tonight.

There is a low probability for widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ430-431-450>455-020800-
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
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-
350 AM EDT Sun Apr 1 2018

This Hazardous Weather Outlook is for Atlantic coastal waters and
Delaware Bay Waters.

.DAY ONE...Today and Tonight.

There is a low probability for widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

There is a chance of gale-force wind gusts on the ocean waters
Tuesday night and Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 1, 3:35 PM EDTSmall Craft AdvisoryPHI23 hr

Nearby

Winter Weather Advisories in New Jersey, 2018Winter Weather Advisories in Pennsylvania, 2018Winter Weather Advisories in Maryland, 2018Every winter weather advisory 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.