Dense Fog Advisory 4, NWS Philadelphia/Mount Holly

Issued

Jul 13, 2021, 3:44 PM EDT (19:44 UTC)

In effect from

Jul 14, 2021, 2:00 AM EDT

Expired

Jul 14, 2021, 5:25 AM EDT

In force

3 hr

Issued by

NWS Philadelphia/Mount Holly

Counties Burlington County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Bucks County, PA, Monroe County, PA, Northampton County, PA

The Philadelphia radar (KDIX), 71 km from the middle of the area, began a volume at 19:44 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.

366 
WWUS71 KPHI 131944
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
344 PM EDT Tue Jul 13 2021

NJZ019-PAZ106-140015-
/O.NEW.KPHI.FG.Y.0004.210714T0600Z-210714T1300Z/
/O.CON.KPHI.HT.Y.0006.000000T0000Z-210714T0000Z/
Northwestern Burlington-Lower Bucks-
Including the cities of Moorestown, Mount Holly, Morrisville, 
and Doylestown
344 PM EDT Tue Jul 13 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...DENSE FOG ADVISORY IN EFFECT FROM 2 AM TO 9 AM EDT WEDNESDAY...

* WHAT...For the Dense Fog Advisory, visibility one quarter mile
  or less in dense fog. For the Heat Advisory, heat index values
  up to 100.

* WHERE...In New Jersey, Northwestern Burlington. In 
  Pennsylvania, Lower Bucks.

* WHEN...For the Dense Fog Advisory, from 2 AM to 9 AM EDT 
  Wednesday. For the Heat Advisory, until 8 PM EDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat
  illnesses to occur. Hazardous driving conditions due to low
  visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.

&&

$$

NJZ001-007>010-012>015-020-026-027-PAZ055-062-105-140015-
/O.NEW.KPHI.FG.Y.0004.210714T0600Z-210714T1300Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Ocean-Coastal Ocean-
Southeastern Burlington-Monroe-Northampton-Upper Bucks-
Including the cities of Newton, Washington, Morristown, 
Flemington, Somerville, New Brunswick, Freehold, Sandy Hook, 
Trenton, Jackson, Long Beach Island, Wharton State Forest, 
Stroudsburg, Bethlehem, Easton, Chalfont, and Perkasie
344 PM EDT Tue Jul 13 2021

...DENSE FOG ADVISORY IN EFFECT FROM 2 AM TO 9 AM EDT WEDNESDAY...

* WHAT...Visibility one quarter mile or less in dense fog.

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

* WHEN...From 2 AM to 9 AM EDT Wednesday.

* IMPACTS...Hazardous driving conditions due to low visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.

&&

$$

DEZ001-NJZ017-018-PAZ070-071-104-140000-
/O.CON.KPHI.HT.Y.0006.000000T0000Z-210714T0000Z/
New Castle-Gloucester-Camden-Delaware-Philadelphia-
Eastern Montgomery-
Including the cities of Wilmington, Glassboro, Camden, 
Cherry Hill, Media, Philadelphia, Norristown, and Lansdale
344 PM EDT Tue Jul 13 2021

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

* WHAT...Heat index values up to 103.

* WHERE...In Pennsylvania, Delaware, Philadelphia and Eastern 
  Montgomery. In New Jersey, Gloucester and Camden. In Delaware, 
  New Castle.

* WHEN...Until 8 PM EDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

MDZ012-015-019-020-140000-
/O.CON.KPHI.HT.Y.0006.000000T0000Z-210714T0000Z/
Kent MD-Queen Annes-Talbot-Caroline-
Including the cities of Chestertown, Centreville, Easton, 
and Denton
344 PM EDT Tue Jul 13 2021

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

* WHAT...Heat index values up to 108.

* WHERE...Caroline, Talbot, Kent MD and Queen Annes.

* WHEN...Until 8 PM EDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

Robertson/Staarmann

046 
WWUS71 KPHI 132353
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
753 PM EDT Tue Jul 13 2021

NJZ019-PAZ106-141300-
/O.EXP.KPHI.HT.Y.0006.000000T0000Z-210714T0000Z/
/O.CON.KPHI.FG.Y.0004.210714T0600Z-210714T1300Z/
Northwestern Burlington-Lower Bucks-
Including the cities of Moorestown, Mount Holly, Morrisville, 
and Doylestown
753 PM EDT Tue Jul 13 2021

...DENSE FOG ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM EDT
WEDNESDAY...
...HEAT ADVISORY WILL EXPIRE AT 8 PM EDT THIS EVENING...

* WHAT...Visibility one quarter mile or less in dense fog.

* WHERE...In Pennsylvania, lower Bucks County. In New Jersey, 
  northwestern Burlington County.

* WHEN...From 2 AM to 9 AM EDT Wednesday.

* IMPACTS...Hazardous driving conditions due to low visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.

&&

$$

DEZ001-NJZ017-018-PAZ070-071-104-140100-
/O.EXP.KPHI.HT.Y.0006.000000T0000Z-210714T0000Z/
New Castle-Gloucester-Camden-Delaware-Philadelphia-
Eastern Montgomery-
Including the cities of Wilmington, Glassboro, Camden, 
Cherry Hill, Media, Philadelphia, Norristown, and Lansdale
753 PM EDT Tue Jul 13 2021

...HEAT ADVISORY WILL EXPIRE AT 8 PM EDT THIS EVENING...

Heat indices are now below advisory criteria. Therefore, the
advisory will be allowed to expire.

$$

MDZ012-015-019-020-140100-
/O.EXP.KPHI.HT.Y.0006.000000T0000Z-210714T0000Z/
Kent MD-Queen Annes-Talbot-Caroline-
Including the cities of Chestertown, Centreville, Easton, 
and Denton
753 PM EDT Tue Jul 13 2021

...HEAT ADVISORY WILL EXPIRE AT 8 PM EDT THIS EVENING...

Heat indices are now below advisory criteria. Therefore, the
advisory will be allowed to expire.

$$

NJZ001-007>010-012>015-020-026-027-PAZ055-062-105-141300-
/O.CON.KPHI.FG.Y.0004.210714T0600Z-210714T1300Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Ocean-Coastal Ocean-
Southeastern Burlington-Monroe-Northampton-Upper Bucks-
Including the cities of Newton, Washington, Morristown, 
Flemington, Somerville, New Brunswick, Freehold, Sandy Hook, 
Trenton, Jackson, Long Beach Island, Wharton State Forest, 
Stroudsburg, Bethlehem, Easton, Chalfont, and Perkasie
753 PM EDT Tue Jul 13 2021

...DENSE FOG ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM EDT
WEDNESDAY...

* WHAT...Visibility one quarter mile or less in dense fog.

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

* WHEN...From 2 AM to 9 AM EDT Wednesday.

* IMPACTS...Hazardous driving conditions due to low visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.

&&

$$

CMS

603 
WWUS71 KPHI 140716
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
316 AM EDT Wed Jul 14 2021

NJZ001-007>010-012>015-019-020-026-027-PAZ055-062-105-106-141300-
/O.CON.KPHI.FG.Y.0004.000000T0000Z-210714T1300Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Northwestern Burlington-
Ocean-Coastal Ocean-Southeastern Burlington-Monroe-Northampton-
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, 
Wharton State Forest, Stroudsburg, Bethlehem, Easton, Chalfont, 
Perkasie, Morrisville, and Doylestown
316 AM EDT Wed Jul 14 2021

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT THIS
MORNING...

* WHAT...Visibility one quarter mile or less in dense fog.

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

* WHEN...Until 9 AM EDT this morning.

* IMPACTS...Hazardous driving conditions due to low visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.

&&

$$

MPS

728 
WWUS71 KPHI 140925
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
525 AM EDT Wed Jul 14 2021

NJZ001-007>010-012>015-019-020-026-027-PAZ055-062-105-106-141030-
/O.CAN.KPHI.FG.Y.0004.000000T0000Z-210714T1300Z/
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Northwestern Burlington-
Ocean-Coastal Ocean-Southeastern Burlington-Monroe-Northampton-
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, 
Wharton State Forest, Stroudsburg, Bethlehem, Easton, Chalfont, 
Perkasie, Morrisville, and Doylestown
525 AM EDT Wed Jul 14 2021

...DENSE FOG ADVISORY IS CANCELLED...

Although areas of fog will be in place across the region this
morning, widespread dense fog is lifting. For the most part, 
visibilities will be as low as 1 mile, but there may be some
spots, especially across portions of eastern New Jersey and in 
the mountains where locally dense fog will continue. 

$$

MPS

Dense Fog Advisories in New Jersey, 2021Dense Fog Advisories in Pennsylvania, 2021Every dense fog advisory in 2021

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.