Alert archive / New Jersey / Dense Fog Advisories in 2018

Dense Fog Advisory 7, NWS Philadelphia/Mount Holly

April 4, 20184 states

NWS Philadelphia/Mount Holly issued this dense fog advisory at Apr 4, 2018, 12:01 AM EDT for 4 states. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Apr 4, 2018, 12:01 AM EDT (04:01 UTC)
Expired
Apr 4, 2018, 10:00 AM EDT
In force
10 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 04:03 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, 4.0 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 2018-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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 2018-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 531 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
1 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
411 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
531 m²/s²
0-3 km storm-relative helicity
692 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

264 
WWUS71 KPHI 040401
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
1201 AM EDT Wed Apr 4 2018

NJZ009-010-012>015-019-020-026-PAZ070-071-101>106-041615-
/O.NEW.KPHI.FG.Y.0007.180404T0401Z-180404T1000Z/
/O.CON.KPHI.WI.Y.0005.180404T1400Z-180405T0000Z/
Hunterdon-Somerset-Middlesex-Western Monmouth-Eastern Monmouth-
Mercer-Northwestern Burlington-Ocean-Coastal Ocean-Delaware-
Philadelphia-Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Flemington, Somerville, New Brunswick, 
Freehold, Sandy Hook, Trenton, Moorestown, Mount Holly, Jackson, 
Long Beach Island, Media, Philadelphia, Honey Brook, Oxford, 
West Chester, Kennett Square, Collegeville, Pottstown, 
Norristown, Lansdale, Chalfont, Perkasie, Morrisville, 
and Doylestown
1201 AM EDT Wed Apr 4 2018

...DENSE FOG ADVISORY IN EFFECT UNTIL 6 AM EDT WEDNESDAY...
...WIND ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM EDT
WEDNESDAY...

The National Weather Service in Mount Holly has issued a Dense
Fog Advisory, which is in effect until 6 AM EDT Wednesday.

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

* WINDS...Southwest to west-northwest 15 to 30 mph with gusts up 
  to 50 mph.

* TIMING...Dense fog has developed and will continue through the
  overnight hours before gradually improving after sunrise.
  Southwest winds will increase Wednesday morning, then quickly
  shift to the west-northwest as a strong cold front crosses the
  area late in the morning into the early afternoon. A line of
  showers with embedded thunderstorms will move through with the
  front, and this could bring localized wind gusts to 50 mph or
  greater. Following the passage of the cold front, widespread
  west-northwest winds gusting 40 to 50 mph will occur through 
  Wednesday afternoon before diminishing in the early evening.

* IMPACTS...Strong winds may blow down limbs, trees, and power 
  lines. Scattered power outages are expected. Limited 
  visibilities in dense fog will make travel very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that very windy conditions are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution. Light-weight outdoor
objects such as patio furniture and garbage cans should be
secured.

A Dense Fog Advisory means visibilities will frequently be
reduced to less than one quarter mile. If driving...slow down...
use your headlights...and leave plenty of distance ahead of you.

&&

$$

DEZ001>004-MDZ008-012-015-019-020-NJZ001-007-008-016>018-021>025-
027-PAZ054-055-060>062-041615-
/O.CON.KPHI.WI.Y.0005.180404T1400Z-180405T0000Z/
New Castle-Kent-Inland Sussex-Delaware Beaches-Cecil-Kent MD-
Queen Annes-Talbot-Caroline-Sussex-Warren-Morris-Salem-Gloucester-
Camden-Cumberland-Atlantic-Cape May-Atlantic Coastal Cape May-
Coastal Atlantic-Southeastern Burlington-Carbon-Monroe-Berks-
Lehigh-Northampton-
Including the cities of Wilmington, Dover, Georgetown, 
Rehoboth Beach, Elkton, Chestertown, Centreville, Easton, Denton,
Newton, Washington, Morristown, Pennsville, Glassboro, Camden, 
Cherry Hill, Millville, Hammonton, Cape May Court House, 
Ocean City, Atlantic City, Wharton State Forest, Jim Thorpe, 
Stroudsburg, Reading, Allentown, and Bethlehem
1201 AM EDT Wed Apr 4 2018

...WIND ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM EDT
WEDNESDAY...

* WINDS...Southwest to west-northwest 15 to 30 mph with gusts up 
  to 50 mph.

* TIMING...Southwest winds will increase Wednesday morning, then 
  quickly shift to the west-northwest as a strong cold front 
  crosses the area late in the morning into the early afternoon. 
  A line of showers with embedded thunderstorms will move 
  through with the front and this could bring localized wind 
  gusts to 50 mph or greater. Following the passage of the cold 
  front, widespread west-northwest winds gusting 40 to 50 mph 
  will occur through Wednesday afternoon before diminishing in 
  the early evening.

* IMPACTS...Strong winds may blow down limbs, trees, and power 
  lines. Scattered power outages are expected.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that very windy conditions are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution. Light-weight outdoor
objects such as patio furniture and garbage cans should be
secured.

&&

$$

CMS
5 follow-up statements
095 
WWUS71 KPHI 040500
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
100 AM EDT Wed Apr 4 2018

DEZ001-MDZ008-NJZ008-016>018-027-041700-
/O.EXA.KPHI.FG.Y.0007.000000T0000Z-180404T1000Z/
/O.CON.KPHI.WI.Y.0005.180404T1400Z-180405T0000Z/
New Castle-Cecil-Morris-Salem-Gloucester-Camden-
Southeastern Burlington-
Including the cities of Wilmington, Elkton, Morristown, 
Pennsville, Glassboro, Camden, Cherry Hill, 
and Wharton State Forest
100 AM EDT Wed Apr 4 2018

...DENSE FOG ADVISORY IN EFFECT UNTIL 6 AM EDT EARLY THIS
MORNING...
...WIND ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
8 PM EDT THIS EVENING...

The National Weather Service in Mount Holly has issued a Dense
Fog Advisory, which is in effect until 6 AM EDT early this
morning.

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

* WINDS...Southwest to west-northwest 15 to 30 mph with gusts up 
  to 50 mph.

* TIMING...Dense fog has developed and will continue through the
  overnight hours before gradually improving after sunrise.
  Southwest winds will increase Wednesday morning, then quickly
  shift to the west-northwest as a strong cold front crosses the
  area late in the morning into the early afternoon. A line of
  showers with embedded thunderstorms will move through with the
  front, and this could bring localized wind gusts to 50 mph or
  greater. Following the passage of the cold front, widespread
  west-northwest winds gusting 40 to 50 mph will occur through
  Wednesday afternoon before diminishing in the early evening.

* IMPACTS...Strong winds may blow down limbs, trees, and power 
  lines. Scattered power outages are expected. Limited 
  visibilities will make travel very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that very windy conditions are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution. Light-weight outdoor
objects such as patio furniture and garbage cans should be
secured.

A Dense Fog Advisory means visibilities will frequently be
reduced to less than one quarter mile. If driving...slow down...
use your headlights...and leave plenty of distance ahead of you.

&&

$$

NJZ009-010-012>015-019-020-026-PAZ070-071-101>106-041700-
/O.CON.KPHI.FG.Y.0007.000000T0000Z-180404T1000Z/
/O.CON.KPHI.WI.Y.0005.180404T1400Z-180405T0000Z/
Hunterdon-Somerset-Middlesex-Western Monmouth-Eastern Monmouth-
Mercer-Northwestern Burlington-Ocean-Coastal Ocean-Delaware-
Philadelphia-Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Flemington, Somerville, New Brunswick, 
Freehold, Sandy Hook, Trenton, Moorestown, Mount Holly, Jackson, 
Long Beach Island, Media, Philadelphia, Honey Brook, Oxford, 
West Chester, Kennett Square, Collegeville, Pottstown, 
Norristown, Lansdale, Chalfont, Perkasie, Morrisville, 
and Doylestown
100 AM EDT Wed Apr 4 2018

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT EARLY THIS
MORNING...
...WIND ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
8 PM EDT THIS EVENING...

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

* WINDS...Southwest to west-northwest 15 to 30 mph with gusts up 
  to 50 mph.

* TIMING...Dense fog has developed and will continue through the
  overnight hours before gradually improving after sunrise.
  Southwest winds will increase Wednesday morning, then quickly
  shift to the west-northwest as a strong cold front crosses the
  area late in the morning into the early afternoon. A line of
  showers with embedded thunderstorms will move through with the
  front, and this could bring localized wind gusts to 50 mph or
  greater. Following the passage of the cold front, widespread
  west-northwest winds gusting 40 to 50 mph will occur through 
  Wednesday afternoon before diminishing in the early evening.

* IMPACTS...Strong winds may blow down limbs, trees, and power 
  lines. Scattered power outages are expected. Limited 
  visibilities will make travel very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that very windy conditions are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution. Light-weight outdoor
objects such as patio furniture and garbage cans should be
secured.

A Dense Fog Advisory means visibilities will frequently be
reduced to less than one quarter mile. If driving...slow down...
use your headlights...and leave plenty of distance ahead of you.

&&

$$

DEZ002>004-MDZ012-015-019-020-NJZ001-007-021>025-PAZ054-055-
060>062-041700-
/O.CON.KPHI.WI.Y.0005.180404T1400Z-180405T0000Z/
Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-Talbot-
Caroline-Sussex-Warren-Cumberland-Atlantic-Cape May-
Atlantic Coastal Cape May-Coastal Atlantic-Carbon-Monroe-Berks-
Lehigh-Northampton-
Including the cities of Dover, Georgetown, Rehoboth Beach, 
Chestertown, Centreville, Easton, Denton, Newton, Washington, 
Millville, Hammonton, Cape May Court House, Ocean City, 
Atlantic City, Jim Thorpe, Stroudsburg, Reading, Allentown, 
and Bethlehem
100 AM EDT Wed Apr 4 2018

...WIND ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
8 PM EDT THIS EVENING...

* WINDS...Southwest to west-northwest 15 to 30 mph with gusts up 
  to 50 mph.

* TIMING...Southwest winds will increase Wednesday morning, then 
  quickly shift to the west-northwest as a strong cold front 
  crosses the area late in the morning into the early afternoon. 
  A line of showers with embedded thunderstorms will move 
  through with the front and this could bring localized wind 
  gusts to 50 mph or greater. Following the passage of the cold 
  front, widespread west-northwest winds gusting 40 to 50 mph 
  will occur through Wednesday afternoon before diminishing in 
  the early evening.

* IMPACTS...Strong winds may blow down limbs, trees, and power 
  lines. Scattered power outages are expected.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that very windy conditions are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution. Light-weight outdoor
objects such as patio furniture and garbage cans should be
secured.

&&

$$

CMS
889 
WWUS71 KPHI 040744
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
344 AM EDT Wed Apr 4 2018

NJZ008>010-015-017>019-PAZ070-071-101>106-041945-
/O.UPG.KPHI.WI.Y.0005.180404T1400Z-180405T0000Z/
/O.NEW.KPHI.HW.W.0002.180404T1400Z-180405T0000Z/
/O.CON.KPHI.FG.Y.0007.000000T0000Z-180404T1000Z/
Morris-Hunterdon-Somerset-Mercer-Gloucester-Camden-
Northwestern Burlington-Delaware-Philadelphia-Western Chester-
Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks-
Lower Bucks-
Including the cities of Morristown, Flemington, Somerville, 
Trenton, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly,
Media, Philadelphia, Honey Brook, Oxford, West Chester, 
Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, 
Chalfont, Perkasie, Morrisville, and Doylestown
344 AM EDT Wed Apr 4 2018

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT EARLY THIS
MORNING...
...HIGH WIND WARNING IN EFFECT FROM 10 AM THIS MORNING TO 8 PM
EDT THIS EVENING...

The National Weather Service in Mount Holly has issued a High
Wind Warning, which is in effect from 10 AM this morning to 8 PM
EDT this evening. The Wind Advisory is no longer in effect.

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

* WINDS...Southwest 15 to 25 mph with gusts up to 35 mph becoming
  west-northwest 20 to 30 mph with gusts up to 60 mph.

* TIMING...Dense fog has developed and will continue through the
  overnight hours before gradually improving after sunrise.
  Southwest winds will increase this morning, then quickly shift
  to the west-northwest as a strong cold front crosses the area
  late in the morning into the early afternoon. A line of showers
  with embedded thunderstorms will move through with the front,
  and this could bring localized wind gusts of 50 to 60 mph.
  Following the passage of the cold front, widespread west-
  northwest winds gusting 45 to 60 mph will occur through the 
  afternoon before diminishing in the early evening.

* IMPACTS...Damaging winds will blow down trees and power lines.
  Numerous power outages can be expected. Travel will be difficult
  with the strong wind gusts, especially for high profile
  vehicles. Limited visibilities will make travel very difficult 
  early this morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

A Dense Fog Advisory means visibilities will frequently be
reduced to less than one quarter mile. If driving...slow down...
use your headlights...and leave plenty of distance ahead of you.

&&

$$

NJZ001-007-PAZ054-055-060>062-041945-
/O.UPG.KPHI.WI.Y.0005.180404T1400Z-180405T0000Z/
/O.NEW.KPHI.HW.W.0002.180404T1400Z-180405T0000Z/
Sussex-Warren-Carbon-Monroe-Berks-Lehigh-Northampton-
Including the cities of Newton, Washington, Jim Thorpe, 
Stroudsburg, Reading, Allentown, Bethlehem, and Easton
344 AM EDT Wed Apr 4 2018

...HIGH WIND WARNING IN EFFECT FROM 10 AM THIS MORNING TO 8 PM
EDT THIS EVENING...

The National Weather Service in Mount Holly has issued a High
Wind Warning, which is in effect from 10 AM this morning to 8 PM
EDT this evening. The Wind Advisory is no longer in effect.

* WINDS...West to northwest 20 to 30 mph with gusts up to 60 mph.

* TIMING...Southwest winds will increase this morning, then
  quickly shift to the west-northwest as a strong cold front
  crosses the area late in the morning into the early afternoon. A
  line of showers with embedded thunderstorms will move through
  with the front and this could bring localized wind gusts 50 to
  60 mph possible. Following the passage of the cold front,
  widespread west-northwest winds gusting 45 to 60 mph will occur
  through this afternoon before diminishing in the early evening.

* IMPACTS...Damaging winds will blow down trees and power lines.
  Numerous power outages can be expected. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

DEZ001-MDZ008-NJZ012>014-016-020-026-027-041945-
/O.CON.KPHI.FG.Y.0007.000000T0000Z-180404T1000Z/
/O.CON.KPHI.WI.Y.0005.180404T1400Z-180405T0000Z/
New Castle-Cecil-Middlesex-Western Monmouth-Eastern Monmouth-
Salem-Ocean-Coastal Ocean-Southeastern Burlington-
Including the cities of Wilmington, Elkton, New Brunswick, 
Freehold, Sandy Hook, Pennsville, Jackson, Long Beach Island, 
and Wharton State Forest
344 AM EDT Wed Apr 4 2018

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT EARLY THIS
MORNING...
...WIND ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
8 PM EDT THIS EVENING...

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

* WINDS...Southwest 15 to 25 mph with gusts up to 35 mph becoming
  west-northwest 20 to 30 mph with gusts up to 50 mph.

* TIMING...Dense fog has developed and will continue through the
  overnight hours before gradually improving after sunrise.
  Southwest winds will increase this morning, then quickly shift
  to the west-northwest as a strong cold front crosses the area
  late in the morning into the early afternoon. A line of showers
  with embedded thunderstorms will move through with the front,
  and this could bring localized wind gusts to 50 mph or greater.
  Following the passage of the cold front, widespread west-
  northwest winds gusting 40 to 50 mph will occur through the 
  afternoon before diminishing in the early evening.

* IMPACTS...Strong winds may blow down limbs, trees, and power
  lines. Scattered power outages are expected. Limited
  visibilities will make travel very difficult early this morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that very windy conditions are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution. Light-weight outdoor
objects such as patio furniture and garbage cans should be
secured.

A Dense Fog Advisory means visibilities will frequently be
reduced to less than one quarter mile. If driving...slow down...
use your headlights...and leave plenty of distance ahead of you.

&&

$$

DEZ002>004-MDZ012-015-019-020-NJZ021>025-041945-
/O.CON.KPHI.WI.Y.0005.180404T1400Z-180405T0000Z/
Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-Talbot-
Caroline-Cumberland-Atlantic-Cape May-Atlantic Coastal Cape May-
Coastal Atlantic-
Including the cities of Dover, Georgetown, Rehoboth Beach, 
Chestertown, Centreville, Easton, Denton, Millville, Hammonton, 
Cape May Court House, Ocean City, and Atlantic City
344 AM EDT Wed Apr 4 2018

...WIND ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
8 PM EDT THIS EVENING...

* WINDS...Southwest to west 20 to 30 mph with gusts up to 50 mph.

* TIMING...Southwest winds will increase this morning, then
  quickly shift to the west as a strong cold front crosses the
  area late in the morning into the early afternoon. A line of
  showers with embedded thunderstorms will move through with the
  front and this could bring localized wind gusts to 50 mph or
  greater. Following the passage of the cold front, widespread
  west-northwest winds gusting 40 to 50 mph will occur through the 
  afternoon before diminishing in the early evening.

* IMPACTS...Strong winds may blow down limbs, trees, and power 
  lines. Scattered power outages are expected.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that very windy conditions are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution. Light-weight outdoor
objects such as patio furniture and garbage cans should be
secured.

&&

$$

CMS
515 
WWUS71 KPHI 040832
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
432 AM EDT Wed Apr 4 2018

NJZ008>010-015-017>019-PAZ070-071-101>106-042045-
/O.EXT.KPHI.FG.Y.0007.000000T0000Z-180404T1200Z/
/O.CON.KPHI.HW.W.0002.180404T1400Z-180405T0000Z/
Morris-Hunterdon-Somerset-Mercer-Gloucester-Camden-
Northwestern Burlington-Delaware-Philadelphia-Western Chester-
Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks-
Lower Bucks-
Including the cities of Morristown, Flemington, Somerville, 
Trenton, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly,
Media, Philadelphia, Honey Brook, Oxford, West Chester, 
Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, 
Chalfont, Perkasie, Morrisville, and Doylestown
432 AM EDT Wed Apr 4 2018

...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 8 AM EDT THIS MORNING...
...HIGH WIND WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
8 PM EDT THIS EVENING...

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

* WINDS...Southwest 15 to 25 mph with gusts to 35 mph becoming
  west-northwest 20 to 30 mph with gusts up to 60 mph this
  afternoon.

* TIMING...Dense fog has developed and will continue through the
  overnight hours before gradually improving by mid morning.
  Southwest winds will increase this morning, then quickly shift
  to the west-northwest as a strong cold front crosses the area 
  late in the morning into the early afternoon. A line of showers 
  with embedded thunderstorms will move through with the front, 
  and this could bring localized wind gusts of 50 to 60 mph. 
  Following the passage of the cold front, widespread west- 
  northwest winds gusting 45 to 60 mph will occur through the 
  afternoon before diminishing in the early evening.

* IMPACTS...Damaging winds will blow down trees and power lines.
  Numerous power outages can be expected. Travel will be difficult
  with the strong wind gusts, especially for high profile
  vehicles. Limited visibilities will make travel very difficult 
  early this morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

A Dense Fog Advisory means visibilities will frequently be
reduced to less than one quarter mile. If driving...slow down...
use your headlights...and leave plenty of distance ahead of you.

&&

$$

NJZ001-007-PAZ054-055-060>062-042045-
/O.EXB.KPHI.FG.Y.0007.000000T0000Z-180404T1200Z/
/O.CON.KPHI.HW.W.0002.180404T1400Z-180405T0000Z/
Sussex-Warren-Carbon-Monroe-Berks-Lehigh-Northampton-
Including the cities of Newton, Washington, Jim Thorpe, 
Stroudsburg, Reading, Allentown, Bethlehem, and Easton
432 AM EDT Wed Apr 4 2018

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING...
...HIGH WIND WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
8 PM EDT THIS EVENING...

The National Weather Service in Mount Holly has issued a Dense
Fog Advisory, which is in effect until 8 AM EDT this morning.

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

* WINDS...Southwest 15 to 25 mph with gusts to 35 mph becoming
  west-northwest 20 to 30 mph with gusts up to 60 mph this
  afternoon.

* TIMING...Dense fog has developed and will continue through the
  overnight hours before gradually improving by mid morning. 
  Southwest winds will increase this morning, then quickly shift 
  to the west- northwest as a strong cold front crosses the area 
  late in the morning into the early afternoon. A line of showers 
  with embedded thunderstorms will move through with the front, 
  and this could bring localized wind gusts of 50 to 60 mph. 
  Following the passage of the cold front, widespread west- 
  northwest winds gusting 45 to 60 mph will occur through the 
  afternoon before diminishing in the early evening.

* IMPACTS...Damaging winds will blow down trees and power lines.
  Numerous power outages can be expected. Travel will be difficult
  with the strong wind gusts, especially for high profile
  vehicles. Limited visibilities will make travel very difficult 
  early this morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

A Dense Fog Advisory means visibilities will frequently be
reduced to less than one quarter mile. If driving...slow down...
use your headlights...and leave plenty of distance ahead of you.

&&

$$

DEZ001-MDZ008-NJZ012>014-016-020-026-027-042045-
/O.EXT.KPHI.FG.Y.0007.000000T0000Z-180404T1200Z/
/O.CON.KPHI.WI.Y.0005.180404T1400Z-180405T0000Z/
New Castle-Cecil-Middlesex-Western Monmouth-Eastern Monmouth-
Salem-Ocean-Coastal Ocean-Southeastern Burlington-
Including the cities of Wilmington, Elkton, New Brunswick, 
Freehold, Sandy Hook, Pennsville, Jackson, Long Beach Island, 
and Wharton State Forest
432 AM EDT Wed Apr 4 2018

...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 8 AM EDT THIS MORNING...
...WIND ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
8 PM EDT THIS EVENING...

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

* WINDS...Southwest 15 to 25 mph with gusts to 35 mph becoming
  west-northwest 20 to 30 mph with gusts up to 50 mph this 
  afternoon.

* TIMING...Dense fog has developed and will continue through the
  overnight hours before gradually improving by mid morning. 
  Southwest winds will increase this morning, then quickly shift 
  to the west- northwest as a strong cold front crosses the area 
  late in the morning into the early afternoon. A line of showers 
  with embedded thunderstorms will move through with the front, 
  and this could bring localized wind gusts to 50 mph or greater. 
  Following the passage of the cold front, widespread west- 
  northwest winds gusting 40 to 50 mph will occur through the 
  afternoon before diminishing in the early evening.

* IMPACTS...Strong winds may blow down limbs, trees, and power
  lines. Scattered power outages are expected. Limited
  visibilities will make travel very difficult early this morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that very windy conditions are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution. Light-weight outdoor
objects such as patio furniture and garbage cans should be
secured.

A Dense Fog Advisory means visibilities will frequently be
reduced to less than one quarter mile. If driving...slow down...
use your headlights...and leave plenty of distance ahead of you.

&&

$$

DEZ002>004-MDZ012-015-019-020-NJZ021>025-042045-
/O.CON.KPHI.WI.Y.0005.180404T1400Z-180405T0000Z/
Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-Talbot-
Caroline-Cumberland-Atlantic-Cape May-Atlantic Coastal Cape May-
Coastal Atlantic-
Including the cities of Dover, Georgetown, Rehoboth Beach, 
Chestertown, Centreville, Easton, Denton, Millville, Hammonton, 
Cape May Court House, Ocean City, and Atlantic City
432 AM EDT Wed Apr 4 2018

...WIND ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
8 PM EDT THIS EVENING...

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

* TIMING...Southwest winds will increase this morning, then 
  quickly shift to the west as a strong cold front crosses the 
  area late in the morning into the early afternoon. A line of 
  showers with embedded thunderstorms will move through with the 
  front and this could bring localized wind gusts to 50 mph or 
  greater. Following the passage of the cold front, widespread 
  west- northwest winds gusting 40 to 50 mph will occur through 
  the afternoon before diminishing in the early evening.

* IMPACTS...Strong winds may blow down limbs, trees, and power 
  lines. Scattered power outages are expected.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that very windy conditions are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution. Light-weight outdoor
objects such as patio furniture and garbage cans should be
secured.

&&

$$

CMS
701 
WWUS71 KPHI 041155
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
755 AM EDT Wed Apr 4 2018



NJZ001-007>010-015-017>019-PAZ054-055-060>062-070-071-101>106-
050000-
/O.EXT.KPHI.FG.Y.0007.000000T0000Z-180404T1400Z/
/O.CON.KPHI.HW.W.0002.180404T1400Z-180405T0000Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Mercer-Gloucester-Camden-
Northwestern Burlington-Carbon-Monroe-Berks-Lehigh-Northampton-
Delaware-Philadelphia-Western Chester-Eastern Chester-
Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Newton, Washington, Morristown, 
Flemington, Somerville, Trenton, Glassboro, Camden, Cherry Hill, 
Moorestown, Mount Holly, Jim Thorpe, Stroudsburg, Reading, 
Allentown, Bethlehem, Easton, Media, Philadelphia, Honey Brook, 
Oxford, West Chester, Kennett Square, Collegeville, Pottstown, 
Norristown, Lansdale, Chalfont, Perkasie, Morrisville, 
and Doylestown
755 AM EDT Wed Apr 4 2018

...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 10 AM EDT THIS
MORNING...
...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

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

* WINDS...Southwest 15 to 25 mph with gusts to 35 mph becoming
  west-northwest 20 to 30 mph with gusts up to 60 mph this
  afternoon.

* TIMING...Dense fog is continuing at this hour with conditions
  expected to gradually improve late morning. Southwest winds 
  will increase this morning, then quickly shift to the west-
  northwest as a strong cold front crosses the area late in the 
  morning into the early afternoon. A line of showers with 
  embedded thunderstorms will move through with the front, and 
  this could bring localized wind gusts of 50 to 60 mph. Following
  the passage of the cold front, widespread west- northwest winds
  gusting 45 to 60 mph will occur through the afternoon before 
  diminishing in the early evening.

* IMPACTS...Damaging winds will blow down trees and power lines.
  Numerous power outages can be expected. Travel will be difficult
  with the strong wind gusts, especially for high profile
  vehicles. Limited visibilities will make travel very difficult 
  early this morning.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

A Dense Fog Advisory means visibilities will frequently be
reduced to less than one quarter mile. If driving...slow down...
use your headlights...and leave plenty of distance ahead of you.

&&

$$

DEZ001-MDZ008-NJZ012>014-016-020-026-027-050000-
/O.EXT.KPHI.FG.Y.0007.000000T0000Z-180404T1400Z/
/O.CON.KPHI.WI.Y.0005.180404T1400Z-180405T0000Z/
New Castle-Cecil-Middlesex-Western Monmouth-Eastern Monmouth-
Salem-Ocean-Coastal Ocean-Southeastern Burlington-
Including the cities of Wilmington, Elkton, New Brunswick, 
Freehold, Sandy Hook, Pennsville, Jackson, Long Beach Island, 
and Wharton State Forest
755 AM EDT Wed Apr 4 2018

...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 10 AM EDT THIS
MORNING...
...WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING...

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

* WINDS...Southwest 15 to 25 mph with gusts to 35 mph becoming
  west-northwest 20 to 30 mph with gusts up to 50 mph this 
  afternoon.

* TIMING...Dense fog is continuing at this hour with conditions
  expected to gradually improve late morning. Southwest winds 
  will increase this morning, then quickly shift to the west- 
  northwest as a strong cold front crosses the area late in the 
  morning into the early afternoon. A line of showers with 
  embedded thunderstorms will move through with the front, and 
  this could bring localized wind gusts to 50 mph or greater. 
  Following the passage of the cold front, widespread west- 
  northwest winds gusting 40 to 50 mph will occur through the 
  afternoon before diminishing in the early evening.

* IMPACTS...Strong winds may blow down limbs, trees, and power 
  lines. Scattered power outages are expected.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that very windy conditions are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution. Light-weight outdoor
objects such as patio furniture and garbage cans should be
secured.

A Dense Fog Advisory means visibilities will frequently be
reduced to less than one quarter mile. If driving...slow down...
use your headlights...and leave plenty of distance ahead of you.

&&

$$

DEZ002>004-MDZ012-015-019-020-NJZ021>025-050000-
/O.CON.KPHI.WI.Y.0005.180404T1400Z-180405T0000Z/
Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-Talbot-
Caroline-Cumberland-Atlantic-Cape May-Atlantic Coastal Cape May-
Coastal Atlantic-
Including the cities of Dover, Georgetown, Rehoboth Beach, 
Chestertown, Centreville, Easton, Denton, Millville, Hammonton, 
Cape May Court House, Ocean City, and Atlantic City
755 AM EDT Wed Apr 4 2018

...WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING...

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

* TIMING...Southwest winds will increase this morning, then 
  quickly shift to the west as a strong cold front crosses the 
  area late in the morning into the early afternoon. A line of 
  showers with embedded thunderstorms will move through with the 
  front and this could bring localized wind gusts to 50 mph or 
  greater. Following the passage of the cold front, widespread 
  west- northwest winds gusting 40 to 50 mph will occur through 
  the afternoon before diminishing in the early evening.

* IMPACTS...Strong winds may blow down limbs, trees, and power 
  lines. Scattered power outages are expected.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that very windy conditions are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution. Light-weight outdoor
objects such as patio furniture and garbage cans should be
secured.

&&

$$
501 
WWUS71 KPHI 041359
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
959 AM EDT Wed Apr 4 2018



NJZ001-007>010-015-017>019-PAZ054-055-060>062-070-071-101>106-
050000-
/O.EXP.KPHI.FG.Y.0007.000000T0000Z-180404T1400Z/
/O.CON.KPHI.HW.W.0002.180404T1400Z-180405T0000Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Mercer-Gloucester-Camden-
Northwestern Burlington-Carbon-Monroe-Berks-Lehigh-Northampton-
Delaware-Philadelphia-Western Chester-Eastern Chester-
Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Newton, Washington, Morristown, 
Flemington, Somerville, Trenton, Glassboro, Camden, Cherry Hill, 
Moorestown, Mount Holly, Jim Thorpe, Stroudsburg, Reading, 
Allentown, Bethlehem, Easton, Media, Philadelphia, Honey Brook, 
Oxford, West Chester, Kennett Square, Collegeville, Pottstown, 
Norristown, Lansdale, Chalfont, Perkasie, Morrisville, 
and Doylestown
959 AM EDT Wed Apr 4 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...
...DENSE FOG ADVISORY WILL EXPIRE AT 10 AM EDT THIS MORNING...

* WINDS...Southwest 15 to 25 mph with gusts to 35 mph becoming
  west-northwest 20 to 30 mph with gusts up to 60 mph this
  afternoon.

* TIMING...Fog is still dense is spots but conditions are starting
  to improve and will continue to do so through the late morning. Southwest
  winds will increase this morning, then quickly shift to the 
  west- northwest as a strong cold front crosses the area late in 
  the morning into the early afternoon. A line of showers with 
  embedded thunderstorms will move through with the front, and 
  this could bring localized wind gusts of 50 to 60 mph. Following
  the passage of the cold front, widespread west- northwest winds
  gusting 45 to 60 mph will occur through the afternoon before 
  diminishing in the early evening.

* IMPACTS...Damaging winds will blow down trees and power lines. 
  Widespread power outages are expected. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

DEZ001-MDZ008-NJZ012>014-016-020-026-027-050000-
/O.EXP.KPHI.FG.Y.0007.000000T0000Z-180404T1400Z/
/O.CON.KPHI.WI.Y.0005.180404T1400Z-180405T0000Z/
New Castle-Cecil-Middlesex-Western Monmouth-Eastern Monmouth-
Salem-Ocean-Coastal Ocean-Southeastern Burlington-
Including the cities of Wilmington, Elkton, New Brunswick, 
Freehold, Sandy Hook, Pennsville, Jackson, Long Beach Island, 
and Wharton State Forest
959 AM EDT Wed Apr 4 2018

...WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...DENSE FOG ADVISORY WILL EXPIRE AT 10 AM EDT THIS MORNING...

* WINDS...Southwest 15 to 25 mph with gusts to 35 mph becoming
  west-northwest 20 to 30 mph with gusts up to 50 mph this 
  afternoon.

* TIMING...Fog is still dense is spots but conditions are starting
  to improve and will continue to do so through the late morning.Southwest
  winds will increase this morning, then quickly shift to the 
  west- northwest as a strong cold front crosses the area late in 
  the morning into the early afternoon. A line of showers with 
  embedded thunderstorms will move through with the front, and 
  this could bring localized wind gusts to 50 mph or greater. 
  Following the passage of the cold front, widespread west- 
  northwest winds gusting 40 to 50 mph will occur through the 
  afternoon before diminishing in the early evening.

* IMPACTS...Strong winds may blow down limbs, trees, and power 
  lines. Scattered power outages are expected. Limited 
  visibilities will make travel difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that very windy conditions are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution. Light-weight outdoor
objects such as patio furniture and garbage cans should be
secured.

&&

$$

DEZ002>004-MDZ012-015-019-020-NJZ021>025-050000-
/O.CON.KPHI.WI.Y.0005.180404T1400Z-180405T0000Z/
Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-Talbot-
Caroline-Cumberland-Atlantic-Cape May-Atlantic Coastal Cape May-
Coastal Atlantic-
Including the cities of Dover, Georgetown, Rehoboth Beach, 
Chestertown, Centreville, Easton, Denton, Millville, Hammonton, 
Cape May Court House, Ocean City, and Atlantic City
959 AM EDT Wed Apr 4 2018

...WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING...

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

* TIMING...Southwest winds will increase this morning, then 
  quickly shift to the west as a strong cold front crosses the 
  area late in the morning into the early afternoon. A line of 
  showers with embedded thunderstorms will move through with the 
  front and this could bring localized wind gusts to 50 mph or 
  greater. Following the passage of the cold front, widespread 
  west- northwest winds gusting 40 to 50 mph will occur through 
  the afternoon before diminishing in the early evening.

* IMPACTS...Strong winds may blow down limbs, trees, and power 
  lines. Scattered power outages are expected.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that very windy conditions are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution. Light-weight outdoor
objects such as patio furniture and garbage cans should be
secured.

&&

$$

What forecasters said that day

The local office's own words before this dense fog advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this dense fog advisory went out at Apr 3, 9:56 PM EDT, 2 hours 5 minutes earlier.

Area forecast discussion, Apr 3, 9:56 PM EDT, 2 hours 5 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
956 PM EDT Tue Apr 3 2018

.SYNOPSIS...
A warm front will lift across our region through tonight, then a
strong cold front sweeps across our area around midday Wednesday.
High pressure is forecast to follow for Thursday. Another cold front
is expected Friday night, then low pressure is anticipated to track
off the Mid-Atlantic coast Saturday night. High pressure builds in
on Sunday and Monday, then low pressure approaches from the west and
south on Tuesday.

&&

.NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/...
For the 930 PM update, delayed the warming across the northern areas
especially. Added more fog coverage across the northern and western
areas due to visibilities coming down now. May need a Dense Fog
Advisory for at least parts of the area (especially from about the
Philadelphia metro area on north and west), however for now opted to
issue a Special Weather Statement. Dense fog may try to advect
onshore from the marine area overnight. Some showers continue across
the southern areas, however these should exit the coast over the
next hour or two. Some additional showers cannot be ruled out
elsewhere for awhile tonight otherwise some drizzle possible north
of the warm front.

Otherwise, the warm front will slowly push north across the area
late tonight so we expect temperatures to rise with the more notable
rise closer to daybreak. Low clouds along with some fog will occur
especially near and north of the warm front, with some possible
clearing south of the warm front. Some clearing already appears to
be occurring early this evening across the far southern areas,
however as warmer and more humid air advects north later tonight
some fog may develop over the ocean waters and try and advect into
the coastal areas. The fog will be dense in spots especially
northern areas along and north of the I-78 corridor. However
overnight there could actually be some improvement as the gradient
flow and associated mixing starts to strengthen.

&&

.SHORT TERM /6 AM WEDNESDAY MORNING THROUGH 6 PM WEDNESDAY/...
Active weather day shaping up for Wednesday...

Interesting set up for Wednesday as a deepening surface low moves
east-northeast across the lower Great Lakes, sweeping a strong cold
front across our area. To begin the day, our area will be in warm
sector with southwest winds increasing. However, the concern will be
in the late morning through the first part of the afternoon (roughly
11am - 3pm) as a strong cold front moves across the area.

Model guidance suggesting 200-300 J/KG of MLCAPE ahead of the front.
Not very high values, however the dynamics with the aformentioned
low will be strong with 0-1/0-3/0-6 km shear values forecast to be
30/50/55 knots respectively indicating at least some potential for
severe weather with any heavier convective elements with the front.
Much of the hi-res guidance suggests a narrow convective line tied
close to the cold front which races eastward across the area, and
this may intensify some into the I-95 corridor on south and east.
Best chances for strong to severe convection looks to be central and
southern parts of the forecast area from southeast PA through
central and southern NJ and especially Delmarva. A line of showers
with embedded storms looks to move through from west to east around
midday with locally damaging winds possible. Forecast soundings
suggest downward momentum transfer maximizes right near the front,
and a unidirectional wind profile through the column suggests the
potential for embedded bowing segments. The Storm Prediction Center
has included much of our area in the risk for some severe weather
Wednesday.

Following the passage of the cold front, strong gradient west-
northwest winds will move in with a deep mixed layer indicated in
the forecast soundings. Strong pressure rises right behind the cold
front combined with strong cold air advection will rapidly aid in
deeper mixing with stronger winds reaching the surface. It is at
this time we expect widespread west-northwest winds of 20-30 mph
with gusts up to 50 mph. As a result, a Wind Advisory has been
issued for the entire area. Midday highs will range from the mid 50s
north to the mid to upper 60s central/south before temperatures begin
falling through the afternoon in the wake of the front.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH TUESDAY/...
The progressive pattern is forecast to continue during the period
from Wednesday night through Tuesday.

High pressure is expected to begin building into our region on
Wednesday night. The gusty northwest wind during the evening hours
should diminish a bit overnight. Dry weather is anticipated.

The center of high pressure is forecast to slide to our south on
Thursday. The pattern should maintain a brisk westerly wind in our
region. No precipitation is expected on Thursday. We may see an
increase in high clouds ahead of our next weather system at that
time.

Low pressure is expected to move from the eastern Great Lakes on
Friday morning to Atlantic Canada on Saturday morning. It should
pull a cold front through our region on Friday night. Precipitation
in the developing warm advection ahead of the system is anticipated
to arrive late on Thursday night. The potential for precipitation
continues through Friday and into Friday night with the frontal
passage. Based on the thermal profiles, most of the precipitation
will fall as rain. However, there could be a little snow in our
northern counties for a time on Thursday night and again on Friday
night. The shot on Thursday night could leave a light accumulation.

A wave of low pressure is forecast to ride along the trailing cold
front. The low is expected to pass across the southeastern states on
Friday night and Saturday before passing off the Middle Atlantic
coast on Saturday night. It should bring additional rain to our
region for Saturday and Saturday evening.

High pressure is expected to push down from the Great Lakes for
Sunday and Sunday night.

Another complex forecast is setting up for early in the new week.
Low pressure is expected to approach from the west with its energy
transferring to a develop coastal low. The system is anticipated to
bring additional precipitation to our region at that time.

Temperatures during the period from Wednesday night through Tuesday
will continue to be more normal for early March than for early April
with one exception. Afternoon readings should be near normal on
Friday.

&&

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

Tonight...IFR/LIFR conditions due to low clouds and fog/mist (few
showers this evening mainly south and east of PHL). Some improvement
may occur after 07z especially from about PHL on south and east as a
warm front lifts northward, however the extent and timing remains
less certain. Light east to southeast surface winds will start to
become more southerly overnight and increase toward morning.
Southwesterly low-level wind shear (40 knots near 2,000 feet)
develops later this evening and continues through the overnight. Low
to moderate confidence.

Wednesday...A strong cold front moves through west to east near
midday with mostly a narrow band of heavier showers and some
embedded thunderstorms. MVFR/IFR in the morning, then again with
showers/thunderstorms in the late morning and early afternoon. Given
less confidence in thunderstorm coverage, a mention is not included
in the TAFs. Improving conditions may occur faster than what is
currently indicated in the TAFs. Southwest winds around 10 knots,
quickly shifts to west-northwest and increases to 15-25 knots with
gusts to around 40 knots.

Outlook...
Wednesday night and Thursday...Mainly VFR. Gusty west-northwest
winds diminishing Wednesday night.

Thursday night...Mainly VFR. A chance of rain around KRDG and KABE
after midnight.

Friday...Conditions possibly lowering to MVFR with a chance of rain.

Friday night...Mainly VFR with a chance of light rain and light snow.

Saturday and Saturday evening...Conditions possibly lowering to MVFR
with a chance of rain.

Late Saturday night and Sunday...Mainly VFR.

&&

.MARINE...
Issued a Dense Fog Advisory for the overnight through mid-morning
Wednesday time frame for the New Jersey Atlantic coastal waters. Fog
is expected to expand and become dense. This advisory may need to be
expanded farther south.

Tonight...Winds becoming southerly everywhere overnight and will
rapidly increase from south to north late, reaching advisory
criteria. Gusts should hit gale force over ocean waters toward
morning, however this may be delayed due to much warmer air
advection northward over the colder waters. Some showers mainly this
evening, and fog is expected to develop.

Wednesday...Gale conditions expected to develop on the Bay and
continue over the ocean waters with strong southerly winds shifting
to west-northwest in the afternoon behind a strong cold front. The
strongest winds may end up occurring behind the cold front due to
strong cold air advection developing during the afternoon.

Outlook...
Wednesday night...A Gale Warning continuing on Delaware Bay
until 10:00 PM, and on our ocean waters until 4:00 AM for west
northwest gale force gusts.

Thursday...West northwest gusts around 25 knots are possible.

Thursday night...No marine headlines are anticipated.

Friday...South to southwest wind gusts of 25 to 30 knots. Local gale
force gusts are possible.

Friday night...Southwest wind becoming northwest with gusts around
25 knots.

Saturday through Sunday...No marine headlines are anticipated.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Wind Advisory from 10 AM to 8 PM EDT Wednesday for PAZ054-055-
     060>062-070-071-101>106.
NJ...Wind Advisory from 10 AM to 8 PM EDT Wednesday for NJZ001-
     007>010-012>027.
DE...Wind Advisory from 10 AM to 8 PM EDT Wednesday for DEZ001>004.
MD...Wind Advisory from 10 AM to 8 PM EDT Wednesday for MDZ008-012-
     015-019-020.
MARINE...Dense Fog Advisory until 10 AM EDT Wednesday for ANZ450>453.
     Gale Warning from 7 AM Wednesday to 4 AM EDT Thursday for
     ANZ450>455.
     Gale Warning from 10 AM to 10 PM EDT Wednesday for ANZ430-431.

&&

Synopsis...Gorse/Iovino
Near Term...Fitzsimmons/Gorse
Short Term...Fitzsimmons/Gorse
Long Term...Iovino
Aviation...Fitzsimmons/Gorse/Iovino
Marine...Fitzsimmons/Gorse/Iovino
Hazardous weather outlook, Apr 3, 9:43 PM EDT, 2 hours 18 minutes before
Hazardous Weather Outlook
National Weather Service Mount Holly NJ
943 PM EDT Tue Apr 3 2018

DEZ002>004-MDZ015-019-020-NJZ023-024-050145-
Kent-Inland Sussex-Delaware Beaches-Queen Annes-Talbot-Caroline-
Cape May-Atlantic Coastal Cape May-
943 PM EDT Tue Apr 3 2018

...WIND ADVISORY IN EFFECT FROM 10 AM TO 8 PM EDT WEDNESDAY...

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

.DAY ONE...Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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

   Wind Advisory.

There is a potential for thunderstorms to produce locally damaging
winds early Wednesday afternoon across portions of eastern Maryland,
central and southern Delaware and extreme southern New Jersey.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed Wednesday.

DEZ001-MDZ008-012-NJZ001-007>010-012>022-025>027-PAZ054-055-060>062-
070-071-101>106-050145-
New Castle-Cecil-Kent MD-Sussex-Warren-Morris-Hunterdon-Somerset-
Middlesex-Western Monmouth-Eastern Monmouth-Mercer-Salem-Gloucester-
Camden-Northwestern Burlington-Ocean-Cumberland-Atlantic-
Coastal Atlantic-Coastal Ocean-Southeastern Burlington-Carbon-Monroe-
Berks-Lehigh-Northampton-Delaware-Philadelphia-Western Chester-
Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks-
Lower Bucks-
943 PM EDT Tue Apr 3 2018

...WIND ADVISORY IN EFFECT FROM 10 AM TO 8 PM EDT WEDNESDAY...

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...Tonight.

The fog has become dense in spots this evening. A Dense Fog Advisory
may be needed for a portion of the region if the dense fog becomes
more widespread in coverage later tonight.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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

   Wind Advisory.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ454-455-050145-
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-
943 PM EDT Tue Apr 3 2018

...GALE WARNING IN EFFECT FROM 7 AM WEDNESDAY TO 4 AM EDT THURSDAY...

This Hazardous Weather Outlook is for Atlantic coastal waters.

.DAY ONE...Tonight.

There is a potential for patchy dense fog in the Delaware coastal
waters.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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

   Gale Warning.

A brief period of southwesterly gales are possible Friday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ450>453-050145-
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-
943 PM EDT Tue Apr 3 2018

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM EDT WEDNESDAY...
...GALE WARNING IN EFFECT FROM 7 AM WEDNESDAY TO 4 AM EDT THURSDAY...

This Hazardous Weather Outlook is for Atlantic coastal waters.

.DAY ONE...Tonight.

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

   Dense Fog Advisory.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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

   Dense Fog Advisory.
   Gale Warning.

A brief period of southwesterly gales are possible Friday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ430-431-050145-
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
943 PM EDT Tue Apr 3 2018

...GALE WARNING IN EFFECT FROM 10 AM TO 10 PM EDT WEDNESDAY...

This Hazardous Weather Outlook is for Delaware Bay Waters.

.DAY ONE...Tonight.

There is a potential for patchy dense fog in the Delaware coastal
waters.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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

   Gale Warning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Apr 3, 9:31 PM EDT, 2 hours 30 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
931 PM EDT Tue Apr 3 2018

NJZ001-007>010-012>015-PAZ054-055-060>062-101>106-040400-
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Carbon-Monroe-Berks-
Lehigh-Northampton-Western Chester-Eastern Chester-
Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Newton, Washington, Morristown,
Flemington, Somerville, New Brunswick, Freehold, Sandy Hook,
Trenton, Jim Thorpe, Stroudsburg, Reading, Allentown, Bethlehem,
Easton, Honey Brook, Oxford, West Chester, Kennett Square,
Collegeville, Pottstown, Norristown, Lansdale, Chalfont,
Perkasie, Morrisville, and Doylestown
931 PM EDT Tue Apr 3 2018

...FOG WILL BECOME DENSE FOG IN SPOTS THIS EVENING...

At 930 PM...Widespread fog has developed across central and
northwestern New Jersey as well as eastern Pennsylvania. The fog
will become dense in spots this evening and into the overnight
with visibility reduced to one-quarter mile at times.

If driving tonight, use extra caution and be prepared for sudden
reduction in visibility. Allow yourself extra time to reach your
destination. If you encounter dense fog, reduce speed and keep a
safe following distance from the vehicle in front of you.

Klein
Special weather statement, Apr 3, 11:48 PM EDT, 13 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
1148 PM EDT Tue Apr 3 2018

NJZ001-007>010-012>015-019-020-026-PAZ054-055-060>062-070-071-
101>106-041000-
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Northwestern Burlington-
Ocean-Coastal Ocean-Carbon-Monroe-Berks-Lehigh-Northampton-
Delaware-Philadelphia-Western Chester-Eastern Chester-
Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Newton, Washington, Morristown,
Flemington, Somerville, New Brunswick, Freehold, Sandy Hook,
Trenton, Moorestown, Mount Holly, Jackson, Long Beach Island,
Jim Thorpe, Stroudsburg, Reading, Allentown, Bethlehem, Easton,
Media, Philadelphia, Honey Brook, Oxford, West Chester,
Kennett Square, Collegeville, Pottstown, Norristown, Lansdale,
Chalfont, Perkasie, Morrisville, and Doylestown
1148 PM EDT Tue Apr 3 2018

...Areas of dense fog overnight...

Fog has developed in much of eastern Pennsylvania and northern and
central New Jersey late this evening and is expected to continue
through much of the overnight hours. Visibility between a half
mile and two miles is likely for much of the area, with local
visibilities reduced to a quarter mile in spots.

Use extra caution traveling overnight. Use low-beam headlights,
slow down, and maintain extra distance from other vehicles.

CMS

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 4, 3:44 AM EDTHigh Wind WarningPHIBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more16 hr
Apr 4, 12:29 PM EDTSpecial Weather StatementPHIDelaware, Philadelphia31 min
Apr 4, 12:39 PM EDTSevere Thunderstorm WarningPHIBucks, Delaware, Montgomery, Philadelphia51 min
Apr 3, 9:42 PM EDTMarine Dense Fog AdvisoryPHI14 hr
Apr 4, 2:56 AM EDTSpecial Weather StatementPHISussex34 min
Apr 4, 12:54 PM EDTSpecial Marine WarningPHI96 min
Apr 4, 1:07 PM EDTSpecial Marine WarningPHI113 min
Apr 4, 1:13 PM EDTSpecial Weather StatementPHIAtlantic, Cape May, Cumberland62 min
Apr 4, 1:26 PM EDTSpecial Weather StatementPHIBurlington, Camden, Middlesex, Monmouth, Ocean49 min
Apr 4, 1:46 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Cumberland4 hr
Apr 4, 1:46 PM EDTSpecial Marine WarningPHI59 min
Apr 4, 2:15 PM EDTSpecial Weather StatementPHICape May, Ocean30 min
Apr 4, 2:45 PM EDTSpecial Marine WarningPHI90 min
Apr 4, 2:58 PM EDTSpecial Marine WarningPHI92 min
Apr 4, 12:49 PM EDTSpecial Weather StatementPHIKent26 min
Apr 4, 2:17 PM EDTSpecial Weather StatementPHISussex43 min

Nearby

Dense Fog Advisories in New Jersey, 2018Dense Fog Advisories in Pennsylvania, 2018Dense Fog Advisories in Maryland, 2018Every dense fog 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.