Alert archive / New Jersey / Heat Advisories in 2026
Heat Advisory 8, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this heat advisory at Aug 5, 2026, 1:50 PM EDT for 10 counties in Pennsylvania; New Castle County, Delaware; 12 counties in New Jersey. It took effect at Aug 6, 2026, 10:00 AM EDT. It was in force for 55 hr.
The area
The counties it named.
The facts
- Issued
- Aug 5, 2026, 1:50 PM EDT (17:50 UTC)
- In effect from
- Aug 6, 2026, 10:00 AM EDT
- Expired
- Aug 8, 2026, 4:31 PM EDT
- In force
- 55 hr
- Issued by
- NWS Philadelphia/Mount Holly
All 23 counties
New Castle County, DE, 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, 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), 71 km from the middle of the area, began a volume at 17:52 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 12:00Z, 5.8 hours before the alert went out and 194 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1372 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- -42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
182 WWUS71 KPHI 051750 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 150 PM EDT Wed Aug 5 2026 DEZ001-NJZ010-012-013-015-017>020-027-PAZ070-071-102-104-106-061100- /O.NEW.KPHI.HT.Y.0008.260806T1400Z-260808T0000Z/ New Castle-Somerset-Middlesex-Western Monmouth-Mercer-Gloucester- Camden-Northwestern Burlington-Ocean-Southeastern Burlington- Delaware-Philadelphia-Eastern Chester-Eastern Montgomery-Lower Bucks- Including the cities of Glassboro, New Brunswick, Somerville, Media, Freehold, Wharton State Forest, Cherry Hill, Wilmington, West Chester, Kennett Square, Norristown, Doylestown, Moorestown, Philadelphia, Camden, Jackson, Lansdale, Trenton, Mount Holly, and Morrisville 150 PM EDT Wed Aug 5 2026 ...HEAT ADVISORY IN EFFECT FROM 10 AM THURSDAY TO 8 PM EDT FRIDAY... * WHAT...Heat index values up to 100 to 104 expected. * WHERE...Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN...From 10 AM Thursday to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. 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. && $$ NJZ001-007>009-PAZ054-055-060>062-101-103-105-061100- /O.NEW.KPHI.HT.Y.0008.260806T1400Z-260808T0000Z/ Sussex-Warren-Morris-Hunterdon-Carbon-Monroe-Berks-Lehigh- Northampton-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Newton, Bethlehem, Easton, Pottstown, Chalfont, Flemington, Perkasie, Washington, Morristown, Jim Thorpe, Reading, Oxford, Collegeville, Honey Brook, Stroudsburg, and Allentown 150 PM EDT Wed Aug 5 2026 ...HEAT ADVISORY IN EFFECT FROM 10 AM THURSDAY TO 8 PM EDT FRIDAY... * WHAT...Heat index values around 100 expected. * WHERE...Portions of northern and northwest New Jersey and east central, northeast, and southeast Pennsylvania. * WHEN...From 10 AM Thursday to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Robertson
9 follow-up statements
731 WWUS71 KPHI 060649 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 249 AM EDT Thu Aug 6 2026 NJZ014-062000- /O.EXB.KPHI.HT.Y.0008.260806T1400Z-260809T0000Z/ Eastern Monmouth- Including the cities of Sandy Hook 249 AM EDT Thu Aug 6 2026 ...HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 8 PM EDT SATURDAY... * WHAT...Heat index values up to 103 degrees expected. * WHERE...Eastern Monmouth County. * WHEN...From 10 AM this morning to 8 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Warm and very humid conditions at night will not offer much relief from the heat and humidity. 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. 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. && $$ DEZ001-NJZ010-012-013-015-017>020-027-PAZ070-071-102-104-106-062000- /O.EXT.KPHI.HT.Y.0008.260806T1400Z-260809T0000Z/ New Castle-Somerset-Middlesex-Western Monmouth-Mercer-Gloucester- Camden-Northwestern Burlington-Ocean-Southeastern Burlington- Delaware-Philadelphia-Eastern Chester-Eastern Montgomery-Lower Bucks- Including the cities of Wharton State Forest, Trenton, Lansdale, Wilmington, Glassboro, Doylestown, New Brunswick, West Chester, Media, Philadelphia, Freehold, Morrisville, Kennett Square, Moorestown, Mount Holly, Cherry Hill, Jackson, Camden, Somerville, and Norristown 249 AM EDT Thu Aug 6 2026 ...HEAT ADVISORY NOW IN EFFECT FROM 10 AM THIS MORNING TO 8 PM EDT SATURDAY... * WHAT...Heat index values up to 103 degrees expected. * WHERE...Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN...From 10 AM this morning to 8 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Warm and very humid conditions at night will not offer much relief from the heat and humidity. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ PAZ054-055-062000- /O.EXT.KPHI.HT.Y.0008.260806T1400Z-260807T0000Z/ Carbon-Monroe- Including the cities of Stroudsburg and Jim Thorpe 249 AM EDT Thu Aug 6 2026 ...HEAT ADVISORY NOW IN EFFECT FROM 10 AM THIS MORNING TO 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 100 degrees expected. * WHERE...Carbon and Monroe Counties at lower elevations below the Pocono Plateau. * WHEN...From 10 AM this morning to 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. 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. && $$ NJZ001-007>009-PAZ060>062-101-103-105-062000- /O.CON.KPHI.HT.Y.0008.260806T1400Z-260808T0000Z/ Sussex-Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Morristown, Collegeville, Chalfont, Oxford, Pottstown, Easton, Newton, Reading, Flemington, Honey Brook, Washington, Bethlehem, Perkasie, and Allentown 249 AM EDT Thu Aug 6 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 8 PM EDT FRIDAY... * WHAT...Heat index values up to 100 degrees expected. * WHERE...In New Jersey, Morris, Sussex, Warren, and Hunterdon Counties. In Pennsylvania, Berks, Lehigh, Northampton, Upper Bucks, Western Chester, and Western Montgomery Counties. * WHEN...From 10 AM this morning to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Warm and very humid conditions at night will not offer much relief from the heat and humidity. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Staarmann
469 WWUS71 KPHI 061812 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 212 PM EDT Thu Aug 6 2026 DEZ001-NJZ010-012>015-017>020-027-PAZ070-071-102-104-106-070715- /O.CON.KPHI.HT.Y.0008.000000T0000Z-260809T0000Z/ New Castle-Somerset-Middlesex-Western Monmouth-Eastern Monmouth- Mercer-Gloucester-Camden-Northwestern Burlington-Ocean- Southeastern Burlington-Delaware-Philadelphia-Eastern Chester- Eastern Montgomery-Lower Bucks- Including the cities of West Chester, Jackson, Somerville, Mount Holly, Kennett Square, Morrisville, Glassboro, New Brunswick, Media, Doylestown, Wharton State Forest, Sandy Hook, Freehold, Trenton, Camden, Philadelphia, Norristown, Cherry Hill, Lansdale, Wilmington, and Moorestown 212 PM EDT Thu Aug 6 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY... * WHAT...Maximum heat index values up to 104. * WHERE...Northern Delaware, Philadelphia and collar communities, and portions of central and south New Jersey. * WHEN...Until 8 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. 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. && $$ NJZ001-007>009-PAZ060>062-101-103-105-070715- /O.CON.KPHI.HT.Y.0008.000000T0000Z-260808T0000Z/ Sussex-Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Honey Brook, Collegeville, Newton, Perkasie, Allentown, Pottstown, Chalfont, Morristown, Easton, Oxford, Bethlehem, Washington, Reading, and Flemington 212 PM EDT Thu Aug 6 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT FRIDAY... * WHAT...Heat index values up to 104. * WHERE...In Pennsylvania, western Chester, western Montgomery, Upper Bucks, Berks, Lehigh, and Northampton Counties. Northwestern New Jersey. * WHEN...Until 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ PAZ054-055-070000- /O.CON.KPHI.HT.Y.0008.000000T0000Z-260807T0000Z/ Carbon-Monroe- Including the cities of Jim Thorpe and Stroudsburg 212 PM EDT Thu Aug 6 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 100. * WHERE...Carbon and Monroe Counties in Pennsylvania. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. 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. && $$ SFJ
342 WWUS71 KPHI 062345 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 745 PM EDT Thu Aug 6 2026 PAZ054-055-070045- /O.EXP.KPHI.HT.Y.0008.000000T0000Z-260807T0000Z/ Carbon-Monroe- Including the cities of Stroudsburg and Jim Thorpe 745 PM EDT Thu Aug 6 2026 ...HEAT ADVISORY WILL EXPIRE AT 8 PM EDT THIS EVENING... The threat has ended. $$ DEZ001-NJZ010-012>015-017>020-027-PAZ070-071-102-104-106-071300- /O.CON.KPHI.HT.Y.0008.000000T0000Z-260809T0000Z/ New Castle-Somerset-Middlesex-Western Monmouth-Eastern Monmouth- Mercer-Gloucester-Camden-Northwestern Burlington-Ocean- Southeastern Burlington-Delaware-Philadelphia-Eastern Chester- Eastern Montgomery-Lower Bucks- Including the cities of Norristown, Kennett Square, Freehold, West Chester, Somerville, Wharton State Forest, Trenton, Morrisville, Cherry Hill, Jackson, Doylestown, Lansdale, Wilmington, Sandy Hook, Mount Holly, Camden, Glassboro, Media, Moorestown, Philadelphia, and New Brunswick 745 PM EDT Thu Aug 6 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY... * WHAT...Heat index values up to 104 degrees. * WHERE...Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN...Until 8 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Warm and very humid conditions at night will not offer much relief from the heat and humidity. 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. 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. && $$ NJZ001-007>009-PAZ060>062-101-103-105-071300- /O.CON.KPHI.HT.Y.0008.000000T0000Z-260808T0000Z/ Sussex-Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Easton, Honey Brook, Chalfont, Newton, Allentown, Oxford, Pottstown, Reading, Washington, Bethlehem, Collegeville, Perkasie, Flemington, and Morristown 745 PM EDT Thu Aug 6 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT FRIDAY... * WHAT...Heat index values up to 102 degrees. * WHERE...In New Jersey, Morris, Sussex, Warren, and Hunterdon Counties. In Pennsylvania, Berks, Lehigh, Northampton, Upper Bucks, Western Chester, and Western Montgomery Counties. * WHEN...Until 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Warm and very humid conditions at night will not offer much relief from the heat and humidity. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ DeSilva
923 WWUS71 KPHI 070703 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 303 AM EDT Fri Aug 7 2026 NJZ008-009-PAZ101-103-105-072015- /O.EXT.KPHI.HT.Y.0008.000000T0000Z-260809T0000Z/ Morris-Hunterdon-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Perkasie, Flemington, Pottstown, Morristown, Chalfont, Collegeville, Oxford, and Honey Brook 303 AM EDT Fri Aug 7 2026 ...HEAT ADVISORY NOW IN EFFECT UNTIL 8 PM EDT SATURDAY... * WHAT...Heat index values up to 100 degrees expected. * WHERE...In New Jersey, Morris and Hunterdon Counties. In Pennsylvania, Upper Bucks, Western Chester, and Western Montgomery Counties. * WHEN...Until 8 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Warm and very humid conditions at night will not offer much relief from the heat and humidity. 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. 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. && $$ DEZ001-NJZ010-012>015-017>020-027-PAZ070-071-102-104-106-072015- /O.CON.KPHI.HT.Y.0008.000000T0000Z-260809T0000Z/ New Castle-Somerset-Middlesex-Western Monmouth-Eastern Monmouth- Mercer-Gloucester-Camden-Northwestern Burlington-Ocean- Southeastern Burlington-Delaware-Philadelphia-Eastern Chester- Eastern Montgomery-Lower Bucks- Including the cities of Camden, Morrisville, Trenton, Wilmington, Freehold, Somerville, Cherry Hill, Jackson, Wharton State Forest, Lansdale, Media, Sandy Hook, Philadelphia, Glassboro, Moorestown, Norristown, Kennett Square, West Chester, New Brunswick, Mount Holly, and Doylestown 303 AM EDT Fri Aug 7 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY... * WHAT...Heat index values up to 103 degrees expected. * WHERE...Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN...Until 8 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Warm and very humid conditions at night will not offer much relief from the heat and humidity. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NJZ001-007-PAZ060>062-072015- /O.CON.KPHI.HT.Y.0008.000000T0000Z-260808T0000Z/ Sussex-Warren-Berks-Lehigh-Northampton- Including the cities of Easton, Allentown, Bethlehem, Reading, Newton, and Washington 303 AM EDT Fri Aug 7 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 100 degrees expected. * WHERE...In New Jersey, Sussex and Warren Counties. In Pennsylvania, Berks, Lehigh, and Northampton Counties. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Warm and very humid conditions at night will not offer much relief from the heat and humidity. 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. 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. && $$ Staarmann
528 WWUS71 KPHI 071832 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 232 PM EDT Fri Aug 7 2026 DEZ001-NJZ010-012>015-017>020-027-PAZ070-071-102-104-106-081015- /O.CON.KPHI.HT.Y.0008.000000T0000Z-260809T0000Z/ New Castle-Somerset-Middlesex-Western Monmouth-Eastern Monmouth- Mercer-Gloucester-Camden-Northwestern Burlington-Ocean- Southeastern Burlington-Delaware-Philadelphia-Eastern Chester- Eastern Montgomery-Lower Bucks- Including the cities of Morrisville, Lansdale, Kennett Square, Jackson, Doylestown, Media, West Chester, Glassboro, Wilmington, Wharton State Forest, Freehold, Sandy Hook, Moorestown, Philadelphia, Camden, New Brunswick, Mount Holly, Somerville, Norristown, Trenton, and Cherry Hill 232 PM EDT Fri Aug 7 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY... * WHAT...Heat index values up to 103 degrees. * WHERE...Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN...Until 8 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Warm and very humid conditions at night will not offer much relief from the heat and humidity. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NJZ001-007-PAZ060>062-080000- /O.CON.KPHI.HT.Y.0008.000000T0000Z-260808T0000Z/ Sussex-Warren-Berks-Lehigh-Northampton- Including the cities of Allentown, Washington, Reading, Bethlehem, Newton, and Easton 232 PM EDT Fri Aug 7 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 100 degrees. * WHERE...In New Jersey, Sussex and Warren Counties. In Pennsylvania, Berks, Lehigh, and Northampton Counties. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Warm and very humid conditions at night will not offer much relief from the heat and humidity. 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. 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. && $$ NJZ008-009-PAZ101-103-105-081015- /O.CON.KPHI.HT.Y.0008.000000T0000Z-260809T0000Z/ Morris-Hunterdon-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Flemington, Collegeville, Oxford, Honey Brook, Chalfont, Perkasie, Pottstown, and Morristown 232 PM EDT Fri Aug 7 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY... * WHAT...Heat index values up to 100 degrees. * WHERE...In New Jersey, Morris and Hunterdon Counties. In Pennsylvania, Upper Bucks, Western Chester, and Western Montgomery Counties. * WHEN...Until 8 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Warm and very humid conditions at night will not offer much relief from the heat and humidity. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Guzzo
940 WWUS71 KPHI 072133 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 533 PM EDT Fri Aug 7 2026 NJZ001-007-PAZ060>062-072245- /O.CAN.KPHI.HT.Y.0008.000000T0000Z-260808T0000Z/ Sussex-Warren-Berks-Lehigh-Northampton- Including the cities of Washington, Newton, Easton, Bethlehem, Reading, and Allentown 533 PM EDT Fri Aug 7 2026 ...HEAT ADVISORY IS CANCELLED... With storms moving through the area knocking down temperatures, the threat has now ended. $$ DEZ001-NJZ010-012>015-017>020-027-PAZ070-071-102-104-106-081100- /O.CON.KPHI.HT.Y.0008.000000T0000Z-260809T0000Z/ New Castle-Somerset-Middlesex-Western Monmouth-Eastern Monmouth- Mercer-Gloucester-Camden-Northwestern Burlington-Ocean- Southeastern Burlington-Delaware-Philadelphia-Eastern Chester- Eastern Montgomery-Lower Bucks- Including the cities of Jackson, Sandy Hook, Freehold, Doylestown, Morrisville, New Brunswick, Camden, Moorestown, Norristown, Lansdale, Somerville, Trenton, Glassboro, Philadelphia, West Chester, Wilmington, Media, Mount Holly, Cherry Hill, Wharton State Forest, and Kennett Square 533 PM EDT Fri Aug 7 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY... * WHAT...Heat index values up to 102 degrees. * WHERE...Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN...Until 8 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Warm and very humid conditions at night will not offer much relief from the heat and humidity. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NJZ008-009-PAZ101-103-105-081100- /O.CON.KPHI.HT.Y.0008.000000T0000Z-260809T0000Z/ Morris-Hunterdon-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Honey Brook, Collegeville, Oxford, Perkasie, Chalfont, Pottstown, Morristown, and Flemington 533 PM EDT Fri Aug 7 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY... * WHAT...Heat index values up to 100 degrees. * WHERE...In New Jersey, Morris and Hunterdon Counties. In Pennsylvania, Upper Bucks, Western Chester, and Western Montgomery Counties. * WHEN...Until 8 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Warm and very humid conditions at night will not offer much relief from the heat and humidity. 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. 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. && $$ DeSilva
279 WWUS71 KPHI 080627 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 227 AM EDT Sat Aug 8 2026 DEZ001-NJZ010-012>015-017>020-027-PAZ070-071-102-104-106-082000- /O.CON.KPHI.HT.Y.0008.000000T0000Z-260809T0000Z/ New Castle-Somerset-Middlesex-Western Monmouth-Eastern Monmouth- Mercer-Gloucester-Camden-Northwestern Burlington-Ocean- Southeastern Burlington-Delaware-Philadelphia-Eastern Chester- Eastern Montgomery-Lower Bucks- Including the cities of Camden, West Chester, Media, Glassboro, Wharton State Forest, Mount Holly, Kennett Square, Moorestown, New Brunswick, Philadelphia, Wilmington, Trenton, Morrisville, Somerville, Norristown, Sandy Hook, Jackson, Doylestown, Freehold, Lansdale, and Cherry Hill 227 AM EDT Sat Aug 8 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 102 degrees. * WHERE...Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Warm and very humid conditions at night will not offer much relief from the heat and humidity. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NJZ008-009-PAZ101-103-105-082000- /O.CON.KPHI.HT.Y.0008.000000T0000Z-260809T0000Z/ Morris-Hunterdon-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Honey Brook, Perkasie, Flemington, Pottstown, Collegeville, Morristown, Oxford, and Chalfont 227 AM EDT Sat Aug 8 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 100 degrees. * WHERE...In New Jersey, Morris and Hunterdon Counties. In Pennsylvania, Upper Bucks, Western Chester, and Western Montgomery Counties. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Warm and very humid conditions at night will not offer much relief from the heat and humidity. 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. 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. && $$ Staarmann
459 WWUS71 KPHI 081927 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 327 PM EDT Sat Aug 8 2026 DEZ001-NJZ010-012>015-017>020-027-PAZ070-071-102-104-106-090000- /O.CON.KPHI.HT.Y.0008.000000T0000Z-260809T0000Z/ New Castle-Somerset-Middlesex-Western Monmouth-Eastern Monmouth- Mercer-Gloucester-Camden-Northwestern Burlington-Ocean- Southeastern Burlington-Delaware-Philadelphia-Eastern Chester- Eastern Montgomery-Lower Bucks- Including the cities of Sandy Hook, Freehold, Somerville, Mount Holly, Lansdale, Camden, Trenton, West Chester, New Brunswick, Morrisville, Jackson, Media, Wilmington, Philadelphia, Norristown, Glassboro, Moorestown, Wharton State Forest, Kennett Square, Doylestown, and Cherry Hill 327 PM EDT Sat Aug 8 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 102 degrees. * WHERE...Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NJZ008-009-PAZ101-103-105-090000- /O.CON.KPHI.HT.Y.0008.000000T0000Z-260809T0000Z/ Morris-Hunterdon-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Oxford, Chalfont, Honey Brook, Pottstown, Collegeville, Morristown, Flemington, and Perkasie 327 PM EDT Sat Aug 8 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 100 degrees. * WHERE...In New Jersey, Morris and Hunterdon Counties. In Pennsylvania, Upper Bucks, Western Chester, and Western Montgomery Counties. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. 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. && $$ AKL
958 WWUS71 KPHI 082031 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 431 PM EDT Sat Aug 8 2026 DEZ001-NJZ008>010-012>015-017>020-027-PAZ070-071-101>106-082145- /O.CAN.KPHI.HT.Y.0008.000000T0000Z-260809T0000Z/ New Castle-Morris-Hunterdon-Somerset-Middlesex-Western Monmouth- Eastern Monmouth-Mercer-Gloucester-Camden-Northwestern Burlington- Ocean-Southeastern Burlington-Delaware-Philadelphia-Western Chester-Eastern Chester-Western Montgomery-Eastern Montgomery- Upper Bucks-Lower Bucks- Including the cities of Doylestown, Kennett Square, Chalfont, Norristown, Collegeville, Wharton State Forest, Trenton, Lansdale, Morristown, Philadelphia, Cherry Hill, Jackson, Sandy Hook, Moorestown, Pottstown, Media, Wilmington, Mount Holly, Somerville, Flemington, Oxford, West Chester, Glassboro, Morrisville, Freehold, Perkasie, New Brunswick, Honey Brook, and Camden 431 PM EDT Sat Aug 8 2026 ...HEAT ADVISORY IS CANCELLED... Storms this afternoon have caused temperatures to drop. Do not expect heat indicies to return to near advisory levels for the rest of the day. Thus, the threat has ended. $$ DeSilva
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 12:58 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 6 hr |
| Aug 5, 1:13 PM EDT | Flash Flood Warning | PHI | Delaware, Montgomery, Philadelphia | 5 hr |
| Aug 5, 1:23 PM EDT | Flash Flood Warning | PHI | Bucks | 4 hr |
| Aug 5, 2:17 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 4 hr |
| Aug 5, 2:50 PM EDT | Flash Flood Warning | PHI | Bucks | 4 hr |
| Aug 5, 3:33 PM EDT | Flash Flood Warning | PHI | Bucks | 86 min |
| Aug 5, 5:29 PM EDT | Flash Flood Warning | PHI | Middlesex | 3 hr |
Nearby
Heat Advisories in New Jersey, 2026Heat Advisories in Pennsylvania, 2026Heat Advisories in Delaware, 2026Every heat advisory in 2026
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.