Alert archive / New Jersey / Heat Advisories in 2020

Heat Advisory 4, NWS Philadelphia/Mount Holly

July 20, 20204 states

NWS Philadelphia/Mount Holly issued this heat advisory at Jul 20, 2020, 7:57 PM EDT for 4 states. It took effect at Jul 21, 2020, 11:00 AM EDT. It was in force for 33 hr.

The area

The counties it named.

The facts

Issued
Jul 20, 2020, 7:57 PM EDT (23:57 UTC)
In effect from
Jul 21, 2020, 11:00 AM EDT
Expired
Jul 22, 2020, 8:00 PM EDT
In force
33 hr
Issued by
NWS Philadelphia/Mount Holly
All 29 counties

Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Salem County, NJ, Somerset County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 73 km from the middle of the area, began a volume at 23:57 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

Wallops Is Stn, VA (KWAL), launched 12:00Z, 12.0 hours before the alert went out and 207 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, Wallops Is Stn, VA at 12:00Z on 2020-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1303 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 12:00Z on 2020-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -58 square meters per square second.1939Sfc1 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
1303 J/kg
Mixed-layer CIN
-106 J/kg
Mixed-layer LCL
1581 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-58 m²/s²
0-3 km storm-relative helicity
-26 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

238 
WWUS71 KPHI 202357
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
757 PM EDT Mon Jul 20 2020

MDZ015-019-020-211300-
/O.EXP.KPHI.EH.W.0001.000000T0000Z-200721T0000Z/
/O.NEW.KPHI.HT.Y.0004.200721T1500Z-200722T0000Z/
Queen Annes-Talbot-Caroline-
Including the cities of Centreville, Easton, and Denton
757 PM EDT Mon Jul 20 2020

...HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM EDT TUESDAY...
...EXCESSIVE HEAT WARNING WILL EXPIRE AT 8 PM EDT THIS EVENING...

* WHAT...Heat index values up to 105 expected.

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

* WHEN...From 11 AM to 8 PM EDT Tuesday.

* 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.

&&

$$

DEZ001-NJZ015-017>019-PAZ070-071-102-104-106-210100-
/O.EXP.KPHI.EH.W.0001.000000T0000Z-200721T0000Z/
New Castle-Mercer-Gloucester-Camden-Northwestern Burlington-
Delaware-Philadelphia-Eastern Chester-Eastern Montgomery-
Lower Bucks-
Including the cities of Wilmington, Trenton, Glassboro, Camden, 
Cherry Hill, Moorestown, Mount Holly, Media, Philadelphia, 
West Chester, Kennett Square, Norristown, Lansdale, Morrisville, 
and Doylestown
757 PM EDT Mon Jul 20 2020

...EXCESSIVE HEAT WARNING WILL EXPIRE AT 8 PM EDT THIS EVENING...

Temperatures and heat indices will continue to fall into the
evening, although a warm and muggy night with low temperatures in
the low to mid 70s are expected overnight.

$$

DEZ002-003-MDZ008-012-NJZ016-021>023-210100-
/O.EXP.KPHI.EH.W.0001.000000T0000Z-200721T0000Z/
Kent-Inland Sussex-Cecil-Kent MD-Salem-Cumberland-Atlantic-
Cape May-
Including the cities of Dover, Georgetown, Elkton, Chestertown, 
Pennsville, Millville, Hammonton, and Cape May Court House
757 PM EDT Mon Jul 20 2020

...EXCESSIVE HEAT WARNING WILL EXPIRE AT 8 PM EDT THIS EVENING...

Temperatures and heat indices will continue to fall into the
evening, although a warm and muggy night with low temperatures in
the low to mid 70s is expected overnight.

$$

NJZ010-012-013-020-027-PAZ101-103-210100-
/O.EXP.KPHI.EH.W.0001.000000T0000Z-200721T0000Z/
Somerset-Middlesex-Western Monmouth-Ocean-Southeastern Burlington-
Western Chester-Western Montgomery-
Including the cities of Somerville, New Brunswick, Freehold, 
Jackson, Wharton State Forest, Honey Brook, Oxford, Collegeville,
and Pottstown
757 PM EDT Mon Jul 20 2020

...EXCESSIVE HEAT WARNING WILL EXPIRE AT 8 PM EDT THIS EVENING...

Temperatures and heat indices will continue to fall into the
evening, although a warm and muggy night with low temperatures in
the low to mid 70s are expected overnight.

$$

NJZ001-007>009-PAZ060>062-105-210100-
/O.EXP.KPHI.HT.Y.0003.000000T0000Z-200721T0000Z/
Sussex-Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-
Upper Bucks-
Including the cities of Newton, Washington, Morristown, 
Flemington, Reading, Allentown, Bethlehem, Easton, Chalfont, 
and Perkasie
757 PM EDT Mon Jul 20 2020

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

Temperatures and heat indices will continue to fall into the
evening, although warm conditions with low temperatures in the 
low 70s is expected overnight.

$$

DEZ004-NJZ014-024>026-210100-
/O.EXP.KPHI.HT.Y.0003.000000T0000Z-200721T0000Z/
Delaware Beaches-Eastern Monmouth-Atlantic Coastal Cape May-
Coastal Atlantic-Coastal Ocean-
Including the cities of Rehoboth Beach, Sandy Hook, Ocean City, 
Atlantic City, and Long Beach Island
757 PM EDT Mon Jul 20 2020

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

Temperatures and heat indices will continue to fall into the
evening, although a warm and muggy night with low temperatures in
the low to mid 70s is expected overnight.

$$

Staarmann
6 follow-up statements
863 
WWUS71 KPHI 210732
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
332 AM EDT Tue Jul 21 2020

MDZ015-019-020-220000-
/O.CON.KPHI.HT.Y.0004.200721T1500Z-200722T0000Z/
Queen Annes-Talbot-Caroline-
Including the cities of Centreville, Easton, and Denton
332 AM EDT Tue Jul 21 2020

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 
PM EDT THIS EVENING...

* WHAT...Heat index values up to 105 are expected.

* WHERE...The counties of Queen Anne's, Talbot and Caroline.

* WHEN...From 11:00 AM until 8:00 PM.

* IMPACTS...The combination of hot temperatures and high humidity
  levels will create the potential for heat related health 
  issues.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned location, stay
out of the sun, and check on elderly relatives and neighbors. 
Young children and pets should never be left unattended in a 
vehicle under any circumstance.

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

&&

$$

Iovino
408 
WWUS71 KPHI 211235
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
835 AM EDT Tue Jul 21 2020

DEZ002-003-MDZ012-220145-
/O.EXB.KPHI.HT.Y.0004.200721T1500Z-200723T0000Z/
Kent-Inland Sussex-Kent MD-
Including the cities of Dover, Georgetown, and Chestertown
835 AM EDT Tue Jul 21 2020

...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT WEDNESDAY...

* WHAT...Heat index values up to 107 expected.

* WHERE...Kent County in Maryland, Kent County in Delaware, and
  inland portions of Sussex County in Delaware.

* WHEN...Until 8 PM EDT Wednesday.

* 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.

&&

$$

MDZ015-019-020-220145-
/O.EXT.KPHI.HT.Y.0004.200721T1500Z-200723T0000Z/
Queen Annes-Talbot-Caroline-
Including the cities of Centreville, Easton, and Denton
835 AM EDT Tue Jul 21 2020

...HEAT ADVISORY NOW IN EFFECT UNTIL 8 PM EDT WEDNESDAY...

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

* WHERE...Talbot, Queen Anne's, and Caroline Counties in Maryland.

* WHEN...Until 8 PM EDT Wednesday.

* 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.

&&

$$

CMS
287 
WWUS71 KPHI 211915
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
315 PM EDT Tue Jul 21 2020

DEZ001-MDZ008-NJZ016-021>023-220900-
/O.EXB.KPHI.HT.Y.0004.200722T1500Z-200723T0000Z/
New Castle-Cecil-Salem-Cumberland-Atlantic-Cape May-
Including the cities of Wilmington, Elkton, Pennsville, 
Millville, Hammonton, and Cape May Court House
315 PM EDT Tue Jul 21 2020

...HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM EDT WEDNESDAY...

* WHAT...Heat index values up to 107 expected.

* WHERE...Salem, Cumberland, and inland portions of Atlantic and
  Cape May Counties in New Jersey, Cecil County in Maryland, and
  New Castle County in Delaware.

* WHEN...From 11 AM to 8 PM EDT Wednesday.

* 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.

&&

$$

NJZ015-017>019-PAZ070-071-102-104-106-220900-
/O.EXB.KPHI.HT.Y.0004.200722T1500Z-200723T0000Z/
Mercer-Gloucester-Camden-Northwestern Burlington-Delaware-
Philadelphia-Eastern Chester-Eastern Montgomery-Lower Bucks-
Including the cities of Trenton, Glassboro, Camden, Cherry Hill, 
Moorestown, Mount Holly, Media, Philadelphia, West Chester, 
Kennett Square, Norristown, Lansdale, Morrisville, and Doylestown
315 PM EDT Tue Jul 21 2020

...HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM EDT WEDNESDAY...

* WHAT...Heat index values up to 104 expected.

* WHERE...The Philadelphia metro and surrounding areas.

* WHEN...From 11 AM to 8 PM EDT Wednesday.

* 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.

&&

$$

NJZ009-010-012-013-020-027-PAZ060>062-101-103-105-220900-
/O.EXB.KPHI.HT.Y.0004.200722T1500Z-200723T0000Z/
Hunterdon-Somerset-Middlesex-Western Monmouth-Ocean-
Southeastern Burlington-Berks-Lehigh-Northampton-Western Chester-
Western Montgomery-Upper Bucks-
Including the cities of Flemington, Somerville, New Brunswick, 
Freehold, Jackson, Wharton State Forest, Reading, Allentown, 
Bethlehem, Easton, Honey Brook, Oxford, Collegeville, Pottstown, 
Chalfont, and Perkasie
315 PM EDT Tue Jul 21 2020

...HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM EDT WEDNESDAY...

* WHAT...Heat index values up to 104 expected.

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

* WHEN...From 11 AM to 8 PM EDT Wednesday.

* 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.

&&

$$

DEZ002-003-MDZ012-015-019-020-220900-
/O.CON.KPHI.HT.Y.0004.000000T0000Z-200723T0000Z/
Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline-
Including the cities of Dover, Georgetown, Chestertown, 
Centreville, Easton, and Denton
315 PM EDT Tue Jul 21 2020

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT WEDNESDAY...

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

* WHERE...The Eastern Shore of Maryland and central and southern
  Delaware.

* WHEN...Until 8 PM EDT Wednesday.

* 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.

&&

$$

CMS
536 
WWUS71 KPHI 220700
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
300 AM EDT Wed Jul 22 2020

DEZ002-003-MDZ012-015-019-020-230000-
/O.CON.KPHI.HT.Y.0004.000000T0000Z-200723T0000Z/
Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline-
Including the cities of Dover, Georgetown, Chestertown, 
Centreville, Easton, and Denton
300 AM EDT Wed Jul 22 2020

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

* WHAT...Heat index values as high as 103 to 108 this afternoon.

* WHERE...Parts of eastern Maryland, and central and southern 
  Delaware.

* WHEN...Until 8:00 this evening.

* IMPACTS...The combination of hot temperatures and high humidity
  levels will create the potential for heat related health 
  issues.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned location, stay
out of the sun, and check on elderly relatives and neighbors. 
Young children and pets should never be left unattended in a 
vehicle under any circumstance.

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

&&

$$

DEZ001-MDZ008-NJZ016-021>023-230000-
/O.CON.KPHI.HT.Y.0004.200722T1500Z-200723T0000Z/
New Castle-Cecil-Salem-Cumberland-Atlantic-Cape May-
Including the cities of Wilmington, Elkton, Pennsville, 
Millville, Hammonton, and Cape May Court House
300 AM EDT Wed Jul 22 2020

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 
PM EDT THIS EVENING...

* WHAT...Heat index values as high as 100 to 105 this afternoon.

* WHERE...Extreme northeastern Maryland, northern Delaware, and 
  parts of southern New Jersey.

* WHEN...From 11:00 AM this morning until 8:00 PM this evening.

* IMPACTS...The combination of hot temperatures and high humidity
  levels will create the potential for heat related health 
  issues.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned location, stay
out of the sun, and check on elderly relatives and neighbors. 
Young children and pets should never be left unattended in a 
vehicle under any circumstance.

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

&&

$$

NJZ015-017>019-PAZ070-071-102-104-106-230000-
/O.CON.KPHI.HT.Y.0004.200722T1500Z-200723T0000Z/
Mercer-Gloucester-Camden-Northwestern Burlington-Delaware-
Philadelphia-Eastern Chester-Eastern Montgomery-Lower Bucks-
Including the cities of Trenton, Glassboro, Camden, Cherry Hill, 
Moorestown, Mount Holly, Media, Philadelphia, West Chester, 
Kennett Square, Norristown, Lansdale, Morrisville, and Doylestown
300 AM EDT Wed Jul 22 2020

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 
PM EDT THIS EVENING...

* WHAT...Heat index values as high as 99 to 104 this afternoon.

* WHERE...The Philadelphia metropolitan area.

* WHEN...From 11:00 AM this morning until 8:00 PM this evening.

* IMPACTS...The combination of hot temperatures and high humidity
  levels will create the potential for heat related health 
  issues.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned location, stay
out of the sun, and check on elderly relatives and neighbors. 
Young children and pets should never be left unattended in a 
vehicle under any circumstance.

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

&&

$$

NJZ009-010-012-013-020-027-PAZ060>062-101-103-105-230000-
/O.CON.KPHI.HT.Y.0004.200722T1500Z-200723T0000Z/
Hunterdon-Somerset-Middlesex-Western Monmouth-Ocean-
Southeastern Burlington-Berks-Lehigh-Northampton-Western Chester-
Western Montgomery-Upper Bucks-
Including the cities of Flemington, Somerville, New Brunswick, 
Freehold, Jackson, Wharton State Forest, Reading, Allentown, 
Bethlehem, Easton, Honey Brook, Oxford, Collegeville, Pottstown, 
Chalfont, and Perkasie
300 AM EDT Wed Jul 22 2020

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 
PM EDT THIS EVENING...

* WHAT...Heat index values as high as 96 to 101 this afternoon.

* WHERE...Parts of eastern Pennsylvania and New Jersey.

* WHEN...From 11:00 AM this morning until 8:00 PM this evening.

* IMPACTS...The combination of hot temperatures and high humidity
  levels will create the potential for heat related health 
  issues.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned location, stay
out of the sun, and check on elderly relatives and neighbors. 
Young children and pets should never be left unattended in a 
vehicle under any circumstance.

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

&&

$$

Iovino
795 
WWUS71 KPHI 222235
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
635 PM EDT Wed Jul 22 2020

DEZ001-MDZ008-012-015-019-020-NJZ009-PAZ060>062-070-101>105-
222345-
/O.CAN.KPHI.HT.Y.0004.000000T0000Z-200723T0000Z/
New Castle-Cecil-Kent MD-Queen Annes-Talbot-Caroline-Hunterdon-
Berks-Lehigh-Northampton-Delaware-Western Chester-Eastern Chester-
Western Montgomery-Eastern Montgomery-Upper Bucks-
Including the cities of Wilmington, Elkton, Chestertown, 
Centreville, Easton, Denton, Flemington, Reading, Allentown, 
Bethlehem, Media, Honey Brook, Oxford, West Chester, 
Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, 
Chalfont, and Perkasie
635 PM EDT Wed Jul 22 2020

...HEAT ADVISORY IS CANCELLED...

Conditions are now below Heat Advisory criteria.

$$

DEZ002-003-230000-
/O.CON.KPHI.HT.Y.0004.000000T0000Z-200723T0000Z/
Kent-Inland Sussex-
Including the cities of Dover and Georgetown
635 PM EDT Wed Jul 22 2020

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

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

* WHERE...Inland Sussex and Kent.

* 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.

&&

$$

NJZ016-021>023-230000-
/O.CON.KPHI.HT.Y.0004.000000T0000Z-200723T0000Z/
Salem-Cumberland-Atlantic-Cape May-
Including the cities of Pennsville, Millville, Hammonton, 
and Cape May Court House
635 PM EDT Wed Jul 22 2020

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

* WHAT...Heat index values up to 99.

* WHERE...Cape May, Salem, Atlantic and Cumberland.

* 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.

&&

$$

NJZ015-017>019-PAZ071-106-230000-
/O.CON.KPHI.HT.Y.0004.000000T0000Z-200723T0000Z/
Mercer-Gloucester-Camden-Northwestern Burlington-Philadelphia-
Lower Bucks-
Including the cities of Trenton, Glassboro, Camden, Cherry Hill, 
Moorestown, Mount Holly, Philadelphia, Morrisville, 
and Doylestown
635 PM EDT Wed Jul 22 2020

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

* WHAT...Heat index values up to 101.

* WHERE...In Pennsylvania, Philadelphia and Lower Bucks. In New 
  Jersey, Gloucester, Mercer, Northwestern Burlington and Camden.

* 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.

&&

$$

NJZ010-012-013-020-027-230000-
/O.CON.KPHI.HT.Y.0004.000000T0000Z-200723T0000Z/
Somerset-Middlesex-Western Monmouth-Ocean-Southeastern Burlington-
Including the cities of Somerville, New Brunswick, Freehold, 
Jackson, and Wharton State Forest
635 PM EDT Wed Jul 22 2020

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

* WHAT...Heat index values up to 105.

* WHERE...Southeastern Burlington, Western Monmouth, Middlesex, 
  Somerset and Ocean.

* 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.

&&

$$
756 
WWUS71 KPHI 222356
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
756 PM EDT Wed Jul 22 2020

DEZ002-003-230100-
/O.EXP.KPHI.HT.Y.0004.000000T0000Z-200723T0000Z/
Kent-Inland Sussex-
Including the cities of Dover and Georgetown
756 PM EDT Wed Jul 22 2020

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

Conditions are below Heat Advisory criteria.

$$

NJZ016-021>023-230100-
/O.EXP.KPHI.HT.Y.0004.000000T0000Z-200723T0000Z/
Salem-Cumberland-Atlantic-Cape May-
Including the cities of Pennsville, Millville, Hammonton, 
and Cape May Court House
756 PM EDT Wed Jul 22 2020

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

Conditions are below Heat Advisory criteria.

$$

NJZ015-017>019-PAZ071-106-230100-
/O.EXP.KPHI.HT.Y.0004.000000T0000Z-200723T0000Z/
Mercer-Gloucester-Camden-Northwestern Burlington-Philadelphia-
Lower Bucks-
Including the cities of Trenton, Glassboro, Camden, Cherry Hill, 
Moorestown, Mount Holly, Philadelphia, Morrisville, 
and Doylestown
756 PM EDT Wed Jul 22 2020

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

Conditions are below Heat Advisory criteria.

$$

NJZ010-012-013-020-027-230100-
/O.EXP.KPHI.HT.Y.0004.000000T0000Z-200723T0000Z/
Somerset-Middlesex-Western Monmouth-Ocean-Southeastern Burlington-
Including the cities of Somerville, New Brunswick, Freehold, 
Jackson, and Wharton State Forest
756 PM EDT Wed Jul 22 2020

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

Conditions are below Heat Advisory criteria.

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 6:53 PM EDTSpecial Weather StatementPHIQueen Anne's52 min

Nearby

Heat Advisories in New Jersey, 2020Heat Advisories in Pennsylvania, 2020Heat Advisories in Maryland, 2020Every heat advisory in 2020

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.