Alert archive / New Jersey / Heat Advisories in 2024
Heat Advisory 8, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this heat advisory at Jul 31, 2024, 3:56 AM EDT for 4 states. It took effect at Aug 1, 2024, 10:00 AM EDT. It was in force for 34 hr.
The area
The counties it named.
The facts
- Issued
- Jul 31, 2024, 3:56 AM EDT (07:56 UTC)
- In effect from
- Aug 1, 2024, 10:00 AM EDT
- Expired
- Aug 2, 2024, 8:00 PM EDT
- In force
- 34 hr
- Issued by
- NWS Philadelphia/Mount Holly
All 31 counties
Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline 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, Morris County, NJ, Ocean County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Warren 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), 65 km from the middle of the area, began a volume at 07:59 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
Washington/Dulle, VA (KIAD), launched 00:00Z, 7.9 hours before the alert went out and 219 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
- 2 J/kg
- Mixed-layer CIN
- -219 J/kg
- Mixed-layer LCL
- 1384 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
800 WWUS71 KPHI 310756 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 356 AM EDT Wed Jul 31 2024 DEZ001-NJZ010-012-013-015-017>020-027-PAZ070-071-101>104-106-312045- /O.NEW.KPHI.HT.Y.0008.240801T1400Z-240803T0000Z/ New Castle-Somerset-Middlesex-Western Monmouth-Mercer-Gloucester- Camden-Northwestern Burlington-Ocean-Southeastern Burlington- Delaware-Philadelphia-Western Chester-Eastern Chester-Western Montgomery-Eastern Montgomery-Lower Bucks- Including the cities of Honey Brook, Somerville, Lansdale, Collegeville, Pottstown, Wilmington, Moorestown, Wharton State Forest, Glassboro, Kennett Square, Camden, Oxford, New Brunswick, Freehold, Cherry Hill, Philadelphia, Media, Jackson, West Chester, Trenton, Mount Holly, Morrisville, Norristown, and Doylestown 356 AM EDT Wed Jul 31 2024 ...HEAT ADVISORY IN EFFECT FROM 10 AM THURSDAY TO 8 PM EDT FRIDAY... * WHAT...Heat index values up to 102 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. 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. && $$ NJZ007>009-PAZ060>062-105-312045- /O.NEW.KPHI.HT.Y.0008.240801T1400Z-240803T0000Z/ Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Upper Bucks- Including the cities of Morristown, Reading, Perkasie, Bethlehem, Flemington, Allentown, Easton, Washington, and Chalfont 356 AM EDT Wed Jul 31 2024 ...HEAT ADVISORY IN EFFECT FROM 10 AM THURSDAY TO 8 PM EDT FRIDAY... * WHAT...Heat index values up to 100 expected. * WHERE...In New Jersey, Morris, Warren, and Hunterdon Counties. In Pennsylvania, Berks, Lehigh, Northampton, and Upper Bucks Counties. * WHEN...From 10 AM Thursday to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Greatest heat risk will be in the lower elevations and valleys. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ MJL
8 follow-up statements
270 WWUS71 KPHI 311916 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 316 PM EDT Wed Jul 31 2024 DEZ002-003-MDZ012-015-019-020-NJZ016-021-022-011015- /O.EXB.KPHI.HT.Y.0008.240802T1400Z-240803T0000Z/ Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline-Salem- Cumberland-Atlantic- Including the cities of Easton, Pennsville, Millville, Centreville, Chestertown, Georgetown, Denton, Hammonton, and Dover 316 PM EDT Wed Jul 31 2024 ...HEAT ADVISORY IN EFFECT FROM 10 AM TO 8 PM EDT FRIDAY... * WHAT...Heat index values up to 107 expected. * WHERE...In Delaware, Kent and Inland Sussex Counties. In Maryland, Caroline, Kent MD, Queen Annes, and Talbot Counties. In New Jersey, Atlantic, Cumberland, and Salem Counties. * WHEN...From 10 AM 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. 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. && $$ DEZ001-NJZ010-012-013-015-017>020-027-PAZ070-071-101>104-106-011015- /O.CON.KPHI.HT.Y.0008.240801T1400Z-240803T0000Z/ New Castle-Somerset-Middlesex-Western Monmouth-Mercer-Gloucester- Camden-Northwestern Burlington-Ocean-Southeastern Burlington- Delaware-Philadelphia-Western Chester-Eastern Chester-Western Montgomery-Eastern Montgomery-Lower Bucks- Including the cities of Trenton, Mount Holly, Kennett Square, Freehold, Moorestown, Wharton State Forest, Morrisville, Oxford, Glassboro, Pottstown, Lansdale, West Chester, Philadelphia, Jackson, Media, Camden, Wilmington, Honey Brook, New Brunswick, Norristown, Somerville, Collegeville, Doylestown, and Cherry Hill 316 PM EDT Wed Jul 31 2024 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THURSDAY TO 8 PM EDT FRIDAY... * WHAT...Heat index values up to 103 expected. * WHERE...Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN...From 10 AM Thursday to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NJZ007>009-PAZ060>062-105-011015- /O.CON.KPHI.HT.Y.0008.240801T1400Z-240803T0000Z/ Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Upper Bucks- Including the cities of Washington, Easton, Bethlehem, Reading, Perkasie, Chalfont, Morristown, Flemington, and Allentown 316 PM EDT Wed Jul 31 2024 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THURSDAY TO 8 PM EDT FRIDAY... * WHAT...Heat index values up to 100 expected. * WHERE...In New Jersey, Morris, Warren, and Hunterdon Counties. In Pennsylvania, Berks, Lehigh, Northampton, and Upper Bucks Counties. * WHEN...From 10 AM Thursday to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...The highest heat indices will be in the lower elevations. 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. 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. && $$ Gorse
872 WWUS71 KPHI 010102 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 902 PM EDT Wed Jul 31 2024 DEZ001-NJZ010-012-013-015-017>020-027-PAZ070-071-101>104-106-010915- /O.CON.KPHI.HT.Y.0008.240801T1400Z-240803T0000Z/ New Castle-Somerset-Middlesex-Western Monmouth-Mercer-Gloucester- Camden-Northwestern Burlington-Ocean-Southeastern Burlington- Delaware-Philadelphia-Western Chester-Eastern Chester-Western Montgomery-Eastern Montgomery-Lower Bucks- Including the cities of Wharton State Forest, Mount Holly, Morrisville, Kennett Square, Trenton, New Brunswick, Media, Glassboro, Freehold, Camden, Collegeville, Oxford, Lansdale, Moorestown, Doylestown, Philadelphia, Cherry Hill, Wilmington, Pottstown, Honey Brook, Norristown, Somerville, Jackson, and West Chester 902 PM EDT Wed Jul 31 2024 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THURSDAY TO 8 PM EDT FRIDAY... * WHAT...Heat index values ranging from 98 to 103 degrees expected. * WHERE...Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN...From 10 AM Thursday to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NJZ007>009-PAZ060>062-105-010915- /O.CON.KPHI.HT.Y.0008.240801T1400Z-240803T0000Z/ Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Upper Bucks- Including the cities of Washington, Flemington, Easton, Perkasie, Reading, Chalfont, Allentown, Bethlehem, and Morristown 902 PM EDT Wed Jul 31 2024 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THURSDAY TO 8 PM EDT FRIDAY... * WHAT...Heat index values ranging from 95 to 100 degrees expected. * WHERE...In New Jersey, Morris, Warren, and Hunterdon Counties. In Pennsylvania, Berks, Lehigh, Northampton, and Upper Bucks Counties. * 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. 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. && $$ DEZ002-003-MDZ012-015-019-020-NJZ016-021-022-010915- /O.CON.KPHI.HT.Y.0008.240802T1400Z-240803T0000Z/ Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline-Salem- Cumberland-Atlantic- Including the cities of Georgetown, Chestertown, Easton, Pennsville, Dover, Millville, Hammonton, Centreville, and Denton 902 PM EDT Wed Jul 31 2024 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM EDT FRIDAY... * WHAT...Heat index values ranging from 102 to 107 degrees expected. * WHERE...In Delaware, Kent and Inland Sussex Counties. In Maryland, Caroline, Kent MD, Queen Annes, and Talbot Counties. In New Jersey, Atlantic, Cumberland, and Salem Counties. * WHEN...From 10 AM to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Staarmann
887 WWUS71 KPHI 010748 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 348 AM EDT Thu Aug 1 2024 DEZ001-NJZ010-012-013-015-017>020-027-PAZ070-071-101>104-106-012100- /O.CON.KPHI.HT.Y.0008.240801T1400Z-240803T0000Z/ New Castle-Somerset-Middlesex-Western Monmouth-Mercer-Gloucester- Camden-Northwestern Burlington-Ocean-Southeastern Burlington- Delaware-Philadelphia-Western Chester-Eastern Chester-Western Montgomery-Eastern Montgomery-Lower Bucks- Including the cities of Wharton State Forest, Mount Holly, Morrisville, Kennett Square, Trenton, New Brunswick, Media, Glassboro, Freehold, Camden, Collegeville, Oxford, Lansdale, Moorestown, Doylestown, Philadelphia, Cherry Hill, Wilmington, Pottstown, Honey Brook, Norristown, Somerville, Jackson, and West Chester 348 AM EDT Thu Aug 1 2024 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 8 PM EDT FRIDAY... * WHAT...Heat index values ranging from 98 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 Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Limited relief from the heat overnight, with muggy conditions and low temperatures in the mid 70s. 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. 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. && $$ NJZ007>009-PAZ060>062-105-012100- /O.CON.KPHI.HT.Y.0008.240801T1400Z-240803T0000Z/ Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Upper Bucks- Including the cities of Washington, Flemington, Easton, Perkasie, Reading, Chalfont, Allentown, Bethlehem, and Morristown 348 AM EDT Thu Aug 1 2024 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 8 PM EDT FRIDAY... * WHAT...Heat index values ranging from 96 to 101 degrees expected. * WHERE...In New Jersey, Morris, Warren, and Hunterdon Counties. In Pennsylvania, Berks, Lehigh, Northampton, and Upper Bucks Counties. * WHEN...From 10 AM this morning to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ DEZ002-003-MDZ012-015-019-020-NJZ016-021-022-012100- /O.CON.KPHI.HT.Y.0008.240802T1400Z-240803T0000Z/ Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline-Salem- Cumberland-Atlantic- Including the cities of Georgetown, Chestertown, Easton, Pennsville, Dover, Millville, Hammonton, Centreville, and Denton 348 AM EDT Thu Aug 1 2024 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM EDT FRIDAY... * WHAT...Heat index values ranging from 102 to 107 degrees expected. * WHERE...In Delaware, Kent and Inland Sussex Counties. In Maryland, Caroline, Kent MD, Queen Annes, and Talbot Counties. In New Jersey, Atlantic, Cumberland, and Salem Counties. * WHEN...From 10 AM 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. 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. && $$ Staarmann
811 WWUS71 KPHI 011925 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 325 PM EDT Thu Aug 1 2024 DEZ001-NJZ010-012-013-015-017>020-027-PAZ070-071-101>104-106-020330- /O.CON.KPHI.HT.Y.0008.000000T0000Z-240803T0000Z/ New Castle-Somerset-Middlesex-Western Monmouth-Mercer-Gloucester- Camden-Northwestern Burlington-Ocean-Southeastern Burlington- Delaware-Philadelphia-Western Chester-Eastern Chester-Western Montgomery-Eastern Montgomery-Lower Bucks- Including the cities of Collegeville, Norristown, Wharton State Forest, Trenton, Moorestown, West Chester, Freehold, Lansdale, New Brunswick, Camden, Morrisville, Kennett Square, Jackson, Doylestown, Oxford, Cherry Hill, Wilmington, Philadelphia, Media, Glassboro, Somerville, Mount Holly, Pottstown, and Honey Brook 325 PM EDT Thu Aug 1 2024 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT FRIDAY... * WHAT...Heat index values up to 103 degrees. * WHERE...Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN...Until 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NJZ007>009-PAZ060>062-105-020330- /O.CON.KPHI.HT.Y.0008.000000T0000Z-240803T0000Z/ Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Upper Bucks- Including the cities of Reading, Bethlehem, Allentown, Morristown, Chalfont, Easton, Perkasie, Flemington, and Washington 325 PM EDT Thu Aug 1 2024 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT FRIDAY... * WHAT...Heat index values up to 100 degrees. * WHERE...In New Jersey, Morris, Warren, and Hunterdon Counties. In Pennsylvania, Berks, Lehigh, Northampton, and Upper Bucks Counties. * 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. 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. && $$ DEZ002-003-MDZ012-015-019-020-NJZ016-021-022-020330- /O.CON.KPHI.HT.Y.0008.240802T1400Z-240803T0000Z/ Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline-Salem- Cumberland-Atlantic- Including the cities of Dover, Millville, Centreville, Pennsville, Georgetown, Easton, Hammonton, Denton, and Chestertown 325 PM EDT Thu Aug 1 2024 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM EDT FRIDAY... * WHAT...Heat index values up to 106 degrees expected. * WHERE...In Delaware, Kent and Inland Sussex Counties. In Maryland, Caroline, Kent MD, Queen Annes, and Talbot Counties. In New Jersey, Atlantic, Cumberland, and Salem Counties. * WHEN...From 10 AM to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ AKL
254 WWUS71 KPHI 020307 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 1107 PM EDT Thu Aug 1 2024 DEZ001-NJZ010-012-013-015-017>020-027-PAZ070-071-101>104-106-021200- /O.CON.KPHI.HT.Y.0008.000000T0000Z-240803T0000Z/ New Castle-Somerset-Middlesex-Western Monmouth-Mercer-Gloucester- Camden-Northwestern Burlington-Ocean-Southeastern Burlington- Delaware-Philadelphia-Western Chester-Eastern Chester-Western Montgomery-Eastern Montgomery-Lower Bucks- Including the cities of New Brunswick, Mount Holly, Media, Glassboro, West Chester, Philadelphia, Oxford, Freehold, Moorestown, Somerville, Collegeville, Wharton State Forest, Cherry Hill, Lansdale, Kennett Square, Doylestown, Honey Brook, Norristown, Wilmington, Camden, Morrisville, Pottstown, Trenton, and Jackson 1107 PM EDT Thu Aug 1 2024 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT FRIDAY... * WHAT...Heat index values up to 103. * WHERE...Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * 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. 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. && $$ NJZ007>009-PAZ060>062-105-021200- /O.CON.KPHI.HT.Y.0008.000000T0000Z-240803T0000Z/ Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Upper Bucks- Including the cities of Allentown, Chalfont, Flemington, Washington, Easton, Perkasie, Reading, Morristown, and Bethlehem 1107 PM EDT Thu Aug 1 2024 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT FRIDAY... * WHAT...Heat index values up to 100. * WHERE...In New Jersey, Morris, Warren, and Hunterdon Counties. In Pennsylvania, Berks, Lehigh, Northampton, and Upper Bucks Counties. * WHEN...Until 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ DEZ002-003-MDZ012-015-019-020-NJZ016-021-022-021200- /O.CON.KPHI.HT.Y.0008.240802T1400Z-240803T0000Z/ Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline-Salem- Cumberland-Atlantic- Including the cities of Chestertown, Centreville, Pennsville, Georgetown, Denton, Easton, Dover, Hammonton, and Millville 1107 PM EDT Thu Aug 1 2024 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM EDT FRIDAY... * WHAT...Heat index values up to 106 expected. * WHERE...In Delaware, Kent and Inland Sussex Counties. In Maryland, Caroline, Kent MD, Queen Annes, and Talbot Counties. In New Jersey, Atlantic, Cumberland, and Salem Counties. * WHEN...From 10 AM 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. 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. && $$ MJL
166 WWUS71 KPHI 020817 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 417 AM EDT Fri Aug 2 2024 DEZ001-NJZ010-012-013-015-017>019-PAZ070-071-104-106-022030- /O.UPG.KPHI.HT.Y.0008.000000T0000Z-240803T0000Z/ /O.NEW.KPHI.EH.W.0005.240802T0817Z-240803T0000Z/ New Castle-Somerset-Middlesex-Western Monmouth-Mercer-Gloucester- Camden-Northwestern Burlington-Delaware-Philadelphia-Eastern Montgomery-Lower Bucks- Including the cities of Lansdale, Morrisville, New Brunswick, Doylestown, Glassboro, Mount Holly, Norristown, Philadelphia, Wilmington, Camden, Media, Freehold, Moorestown, Trenton, Somerville, and Cherry Hill 417 AM EDT Fri Aug 2 2024 ...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Dangerously hot conditions with heat index values up to 106. * WHERE...Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ DEZ002-003-MDZ012-015-019-020-NJZ016-021-022030- /O.UPG.KPHI.HT.Y.0008.240802T1400Z-240803T0000Z/ /O.NEW.KPHI.EH.W.0005.240802T1400Z-240803T0000Z/ Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline-Salem- Cumberland- Including the cities of Chestertown, Centreville, Pennsville, Georgetown, Denton, Easton, Dover, and Millville 417 AM EDT Fri Aug 2 2024 ...EXCESSIVE HEAT WARNING IN EFFECT FROM 10 AM THIS MORNING TO 8 PM EDT THIS EVENING... * WHAT...Dangerously hot conditions with heat index values up to 110 expected. * WHERE...In Delaware, Kent and Inland Sussex Counties. In Maryland, Caroline, Kent MD, Queen Annes, and Talbot Counties. In New Jersey, Cumberland and Salem Counties. * WHEN...From 10 AM this morning to 8 PM EDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. 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. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. 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. && $$ NJZ001-022030- /O.EXA.KPHI.HT.Y.0008.000000T0000Z-240803T0000Z/ Sussex- Including the cities of Newton 417 AM EDT Fri Aug 2 2024 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 100. * WHERE...Sussex County. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NJZ023-022030- /O.EXA.KPHI.HT.Y.0008.240802T1400Z-240803T0000Z/ Cape May- Including the cities of Cape May Court House 417 AM EDT Fri Aug 2 2024 ...HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 105 expected. * WHERE...Cape May County. * 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. 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. && $$ NJZ007>009-PAZ060>062-105-022030- /O.CON.KPHI.HT.Y.0008.000000T0000Z-240803T0000Z/ Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Upper Bucks- Including the cities of Allentown, Chalfont, Flemington, Washington, Easton, Perkasie, Reading, Morristown, and Bethlehem 417 AM EDT Fri Aug 2 2024 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 103. * WHERE...In New Jersey, Morris, Warren, and Hunterdon Counties. In Pennsylvania, Berks, Lehigh, Northampton, and Upper Bucks Counties. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NJZ020-027-PAZ101>103-022030- /O.CON.KPHI.HT.Y.0008.000000T0000Z-240803T0000Z/ Ocean-Southeastern Burlington-Western Chester-Eastern Chester- Western Montgomery- Including the cities of Kennett Square, Honey Brook, Collegeville, West Chester, Wharton State Forest, Oxford, Pottstown, and Jackson 417 AM EDT Fri Aug 2 2024 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 104. * WHERE...In New Jersey, Ocean and Southeastern Burlington Counties. In Pennsylvania, Eastern Chester, 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. 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. && $$ NJZ022-022030- /O.CON.KPHI.HT.Y.0008.240802T1400Z-240803T0000Z/ Atlantic- Including the cities of Hammonton 417 AM EDT Fri Aug 2 2024 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 105 expected. * WHERE...Atlantic County. * WHEN...From 10 AM this morning to 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ MJL
987 WWUS71 KPHI 022009 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 409 PM EDT Fri Aug 2 2024 DEZ001-NJZ010-012-013-015-017>019-PAZ070-071-104-106-030000- /O.CON.KPHI.EH.W.0005.000000T0000Z-240803T0000Z/ New Castle-Somerset-Middlesex-Western Monmouth-Mercer-Gloucester- Camden-Northwestern Burlington-Delaware-Philadelphia-Eastern Montgomery-Lower Bucks- Including the cities of Mount Holly, New Brunswick, Media, Glassboro, Lansdale, Wilmington, Philadelphia, Somerville, Trenton, Camden, Norristown, Morrisville, Doylestown, Freehold, Moorestown, and Cherry Hill 409 PM EDT Fri Aug 2 2024 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Dangerously hot conditions with heat index values up to 108. * WHERE...Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Any showers and thunderstorms will bring relief from the excessive heat. 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. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. 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. && $$ DEZ002-003-MDZ012-015-019-020-NJZ016-021-030000- /O.CON.KPHI.EH.W.0005.000000T0000Z-240803T0000Z/ Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline-Salem- Cumberland- Including the cities of Dover, Easton, Centreville, Pennsville, Denton, Millville, Georgetown, and Chestertown 409 PM EDT Fri Aug 2 2024 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Dangerously hot conditions with heat index values up to 108. * WHERE...In Delaware, Kent and Inland Sussex Counties. In Maryland, Caroline, Kent MD, Queen Annes, and Talbot Counties. In New Jersey, Cumberland and Salem Counties. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Any showers and thunderstorms will bring relief from the excessive heat. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NJZ001-007>009-PAZ060>062-105-030000- /O.CON.KPHI.HT.Y.0008.000000T0000Z-240803T0000Z/ Sussex-Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Upper Bucks- Including the cities of Washington, Chalfont, Easton, Morristown, Newton, Reading, Flemington, Bethlehem, Perkasie, and Allentown 409 PM EDT Fri Aug 2 2024 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 100. * WHERE...In New Jersey, Morris, Sussex, Warren, and Hunterdon Counties. In Pennsylvania, Berks, Lehigh, Northampton, and Upper Bucks Counties. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Showers and thunderstorms have brought relief from the excessive heat to many areas. 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. 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. && $$ NJZ020-027-PAZ101>103-030000- /O.CON.KPHI.HT.Y.0008.000000T0000Z-240803T0000Z/ Ocean-Southeastern Burlington-Western Chester-Eastern Chester- Western Montgomery- Including the cities of Jackson, West Chester, Kennett Square, Honey Brook, Pottstown, Wharton State Forest, Collegeville, and Oxford 409 PM EDT Fri Aug 2 2024 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 103. * WHERE...In New Jersey, Ocean and Southeastern Burlington Counties. In Pennsylvania, Eastern Chester, Western Chester, and Western Montgomery Counties. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Some showers and thunderstorms will bring relief from the excessive heat. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NJZ022-023-030000- /O.CON.KPHI.HT.Y.0008.000000T0000Z-240803T0000Z/ Atlantic-Cape May- Including the cities of Hammonton and Cape May Court House 409 PM EDT Fri Aug 2 2024 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 103. * WHERE...Atlantic and Cape May 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. 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. && $$
417 WWUS71 KPHI 030005 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 805 PM EDT Fri Aug 2 2024 DEZ001>003-MDZ012-015-019-020-NJZ010-012-013-015>019-021-PAZ070-071- 104-106-030115- /O.EXP.KPHI.EH.W.0005.000000T0000Z-240803T0000Z/ New Castle-Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline- Somerset-Middlesex-Western Monmouth-Mercer-Salem-Gloucester- Camden-Northwestern Burlington-Cumberland-Delaware-Philadelphia- Eastern Montgomery-Lower Bucks- Including the cities of Georgetown, Wilmington, Philadelphia, Mount Holly, Centreville, Moorestown, Cherry Hill, Easton, Dover, Pennsville, Somerville, Trenton, Freehold, Doylestown, Morrisville, Lansdale, Camden, Chestertown, Denton, New Brunswick, Glassboro, Media, Norristown, and Millville 805 PM EDT Fri Aug 2 2024 ...EXCESSIVE HEAT WARNING HAS EXPIRED... $$ NJZ001-007>009-020-022-023-027-PAZ060>062-101>103-105-030115- /O.EXP.KPHI.HT.Y.0008.000000T0000Z-240803T0000Z/ Sussex-Warren-Morris-Hunterdon-Ocean-Atlantic-Cape May- Southeastern Burlington-Berks-Lehigh-Northampton-Western Chester- Eastern Chester-Western Montgomery-Upper Bucks- Including the cities of Oxford, West Chester, Kennett Square, Reading, Easton, Cape May Court House, Jackson, Washington, Pottstown, Honey Brook, Hammonton, Newton, Morristown, Wharton State Forest, Chalfont, Bethlehem, Collegeville, Perkasie, Flemington, and Allentown 805 PM EDT Fri Aug 2 2024 ...HEAT ADVISORY HAS EXPIRED... Temperatures have cooled as we head into the evening and while another hot day is expected for Saturday, conditions should remain below Advisory criteria. $$ Fitzsimmons
What forecasters said that day
The local office's own words before this heat 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 heat advisory went out at Jul 31, 1:27 AM EDT, 2 hours 29 minutes earlier.
Area forecast discussion, Jul 31, 1:27 AM EDT, 2 hours 29 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
127 AM EDT Wed Jul 31 2024
.SYNOPSIS...
Low pressure tracks to our north into Wednesday morning with a
weak front settling into our region. Another weak system arrives
late Wednesday and Thursday, followed by a potentially stronger
system over the weekend. An area of weak high pressure may then
build toward our area early next week.
&&
.NEAR TERM /THROUGH TODAY/...
Minor tweaks made with the 1 AM update. Some
showers/thunderstorms moving through Delmarva and the southern
Poconos. Storms will remain sub-severe however, and shouldn't
pose any risks.
A shortwave embedded in the low-level flow is continuing to
work its way eastward. This will be the source for our weather
through tonight as the main low pressure system continues to
lag behind and looks to pass to our north late in the near term
forecast period.
Shower and thunderstorm activity should continue to work its
way from west to east through the overnight hours, before
tapering off early Wednesday. Some patchy fog is possible. Lows
mostly in the upper 60s to mid 70s. Heading into daytime
Wednesday, a lull in precipitation may form as the shortwave
from today passes offshore and moves away from the region.
Redevelopment of convection looks to be most likely around
midday with the parent surface low just to the northwest of the
region. However, coverage still looks to be only scattered at
best. High temperatures are expected to be in the upper 80s to
low 90s (cooler at higher elevations).
&&
.SHORT TERM /TONIGHT THROUGH FRIDAY NIGHT/...
Hot and very humid with peak heat indices both days between 95
and 105 degrees across the region (lowest along the coast and in
the higher terrain).
The presence of some upper-level troughing in the Northeast and
Mid-Atlantic regions will result in some chances for mainly
diurnally driven convection. Any carryover of convection into
Wednesday night should dissipate with the loss of daytime
heating but also a lack of overall forcing. There looks to be a
surface front or trough across our area Thursday, and with some
additional shortwave energy arriving some convection should
develop to our west and then move into our some of western zones
during the afternoon. The strength of the shortwave and also
the extent of how organized convection can get will determine
how far east it makes it. Some guidance shows a decent amount of
convection arriving later Thursday afternoon and evening. An
MCV could also be present from previous convection well to our
west, however these features are more challenging to predict
farther out in time. A more organized system would result in
some stronger thunderstorms.
Much of Friday could be precipitation-free as we await a
stronger upper-level trough well to our west to get closer to
our area. While at least some convection cannot be ruled out
within the hot and very humid air mass, stronger forcing for
ascent looks to be lacking during the day. Some increased
convection to our west may make a run at parts of our area late
in the afternoon and evening before weakening and/or
dissipating. For now, kept the PoPs no higher than the chance
range.
This will be a hot and very humid time frame with peak heat
indices both Thursday and Friday between about 95 and 105
degrees for much of the area. As a result, a Heat Advisory looks
probable for at least parts of our area for both days (where
the heat index criteria for an advisory starts at 100 degrees).
&&
.LONG TERM /SATURDAY THROUGH TUESDAY/...
Summary...Hot and humid conditions gradually ease; Convective
chances through the weekend, then these decrease early next
week.
Synoptic Overview...An upper-level trough is forecast to
gradually move into the Northeast and Mid-Atlantic regions. This
gradual trough settling in is forecast to chip away at the heat
and humidity, but will support convective chances. As the
trough axis generally reaches our area early next week, weak
high pressure from the north and west starts to settle nearby
and this should bring in some cooling and also drier air.
For Saturday and Sunday...An upper-level trough is forecast to
gradually arrive. As the trough axis remains to our west through
this time frame, a very humid air mass is forecast to remain in
place. The urban I-95 corridor looks to be close to Heat
Advisory criteria Saturday (heat index near 100 degrees). A
surface low associated with this upper- level trough should be
on the weaker side, however this will gradually pull a cold
front across our area later Saturday and Sunday. The forward
movement of this front will determine how long convection lasts
and also the arrival of some drier/less humid air. Some
increased forcing for ascent ahead of the trough, surface low
and cold front will provide lift for the development of showers
and thunderstorms, especially during the afternoons and
evenings. While some stronger thunderstorms are possible, the
extent of shear and instability along with forcing will
determine the details. A high moisture content air mass will
result in a locally heavy rain potential especially with any
more organized or slow-moving convection. It will be very
warm/hot and humid, however the addition of more clouds and
convection should keep temperatures from achieving higher
levels.
For Monday and Tuesday...The aforementioned upper-level trough
is forecast to be crossing our area. The forcing for ascent
along with the plume of deeper moisture is therefore offshore,
however as the trough aloft may weaken a front may remain
stretched west to east across portions of our area. A weak
surface high is also forecast to build nearby and this should be
enough to bring in some drier air. While the air mass does not
look all that cooler with this trough, the heat should ease
along with some lowering of the dew points. The chances for
convection also decreases, however all of this will depend on
the timing of the trough and also how much drying can advect
into our area.
&&
.AVIATION /06Z WEDNESDAY THROUGH SUNDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.
Rest of Tonight (thru 12z)...For the Lehigh Valley terminals,
conditions should drop to MVFR for ceilings, remaining that way
through the night. Some scattered showers/thunderstorms to the
north/west of the terminals, but not expecting any heavy rain to
move over the sites. For the I-95 terminals, MVFR CIGs dropping
down to IFR with KPNE/KTTN with CIGs only dropping to MVFR for
KPHL/KILG. For the South Jersey terminals, conditions have
dropped to IFR and expecting it to remain that way through the
rest of the night. Winds at all sites around 5-10 kt with gusts
up to 20 kt at KACY.
Wednesday...Sub-VFR conditions in the morning (MVFR/IFR)
improve to prevailing VFR by mid-day. Some scattered
showers/thunderstorms will move through in the afternoon. Have
included a VCTS group for KABE/KTTN/KPNE as thunderstorms should
mainly be north of Philadelphia. Southwesterly winds around 10
knots. Moderate confidence in prevailing VFR for most of the
day. Low confidence in timing and extent of convection.
Outlook...
Wednesday night and Thursday...Mostly VFR, however some showers
or thunderstorms possible especially Thursday afternoon and
evening.
Friday through Sunday...Some showers and thunderstorms may
result in times of sub-VFR conditions.
&&
.MARINE...
For Atlantic Coastal Waters...A Small Craft Advisory is in
effect through 8 AM Wednesday for waters south of Cape May and 7
PM Wednesday for waters north of Cape May. Southerly winds are
forecast to range between 15-20 kt through tonight. Occasional
gusts up to 25- 28 kt are possible, most likely this evening.
Seas of 4-6 feet. A few showers and thunderstorms possible,
particularly during the overnight hours. For Wednesday,
southerly winds decrease to 10-15 knots with gusts up to 20
knots. Seas begin to decrease but linger around 5 feet,
particularly north of Cape May, 3-4 feet further south. An
isolated shower or storm remain possible.
For the Delaware Bay...Conditions are expected to remain below
SCA criteria. Southerly winds up to 20 kt possible with choppy
waters. Winds decrease to around 10 knots on Wednesday.
Outlook...
Wednesday night through Sunday...The conditions are anticipated
to be below Small Craft Advisory conditions. Some stronger
thunderstorms are possible.
Rip Currents...
Wednesday and Thursday...South to southwest winds will range
from 10 to 20 mph with waves in the surf zone of 1 to 3 feet. As
a result, there is a MODERATE risk for the development of
dangerous rip currents for the Jersey Shore and a LOW risk for
the Delaware Beaches.
For specific beach forecasts, visit weather.gov/beach/phi
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...None.
NJ...None.
DE...None.
MD...None.
MARINE...Small Craft Advisory until 7 PM EDT this evening for
ANZ450>453.
Small Craft Advisory until 8 AM EDT this morning for ANZ454-
455.
&&
SYNOPSIS...Gorse
NEAR TERM...AKL/Hoeflich/Wunderlin
SHORT TERM...Gorse
LONG TERM...Gorse
AVIATION...AKL/Gorse/Hoeflich/Wunderlin
MARINE...AKL/Gorse/MPS/WunderlinThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 4:09 PM EDT | Special Marine Warning | PHI | 36 min | |
| Jul 31, 4:11 PM EDT | Severe Thunderstorm Warning | PHI | Salem | 34 min |
| Jul 31, 5:25 PM EDT | Special Marine Warning | PHI | 65 min | |
| Jul 31, 5:59 PM EDT | Special Marine Warning | PHI | 91 min | |
| Jul 31, 4:29 PM EDT | Severe Thunderstorm Warning | PHI | Queen Anne's, Talbot | 31 min |
Nearby
Heat Advisories in New Jersey, 2024Heat Advisories in Pennsylvania, 2024Heat Advisories in Maryland, 2024Every heat advisory in 2024
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.