Alert archive / New Jersey / Heat Advisories in 2017
Heat Advisory 4, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this heat advisory at Jul 20, 2017, 3:43 AM EDT for 4 states. It took effect at Jul 20, 2017, 12:00 PM EDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Jul 20, 2017, 3:43 AM EDT (07:43 UTC)
- In effect from
- Jul 20, 2017, 12:00 PM EDT
- Expired
- Jul 20, 2017, 7:00 PM EDT
- In force
- 7 hr
- Issued by
- NWS Philadelphia/Mount Holly
All 23 counties
Kent 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, Cape May County, NJ, Cumberland County, NJ, Hunterdon 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, Lehigh County, PA, Montgomery County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 75 km from the middle of the area, began a volume at 07:47 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 00:00Z, 7.7 hours before the alert went out and 204 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
- 904 J/kg
- Mixed-layer CIN
- -69 J/kg
- Mixed-layer LCL
- 1072 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 90 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted.
909 WWUS71 KPHI 200743 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 343 AM EDT Thu Jul 20 2017 DEZ001-NJZ015-017>019-PAZ070-071-102-104-106-202000- /O.CON.KPHI.EH.W.0002.170720T1600Z-170722T0000Z/ 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 343 AM EDT Thu Jul 20 2017 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM NOON TODAY TO 8 PM EDT FRIDAY... * TEMPERATURES...High temperatures are forecast to be in the middle 90s both today and Friday. There will not be much relief at night with low temperatures in the 70s. * HEAT INDEX VALUES...Generally from 98 to 105 degrees during the afternoon hours on Thursday and Friday. * IMPACTS...The heat and humidity may cause heat stress during outdoor exertion or extended exposure. Excessive heat can be life-threatening among at-risk populations, such as children, the elderly, and those with pre-existing health conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to the early morning or the late evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear light weight and loose fitting clothing and be sure to drink plenty of water. 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 shaded location. Heat stroke is an emergency...call 9 1 1. An Excessive Heat Warning means that a prolonged period of very hot temperatures and high humidity will occur. The combination will create a dangerous situation in which heat related health problems may develop. Drink plenty of fluids, stay in an air conditioned environment, stay out of the sun and be sure to check on elderly relatives and neighbors. Young children and pets should never be left unattended in a vehicle under any circumstance. This is especially true during hot weather when a car's interior can reach lethal temperatures in a matter of minutes. && $$ DEZ002-003-MDZ008-012-015-019-020-NJZ009-010-012-013-016-020>023- 027-PAZ060>062-101-103-105-202000- /O.NEW.KPHI.HT.Y.0004.170720T1600Z-170720T2300Z/ Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot-Caroline- Hunterdon-Somerset-Middlesex-Western Monmouth-Salem-Ocean- Cumberland-Atlantic-Cape May-Southeastern Burlington-Berks-Lehigh- Northampton-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Dover, Georgetown, Elkton, Chestertown, Centreville, Easton, Denton, Flemington, Somerville, New Brunswick, Freehold, Pennsville, Jackson, Millville, Hammonton, Cape May Court House, Wharton State Forest, Reading, Allentown, Bethlehem, Honey Brook, Oxford, Collegeville, Pottstown, Chalfont, and Perkasie 343 AM EDT Thu Jul 20 2017 ...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 7 PM EDT THIS EVENING... The National Weather Service in Mount Holly has issued a Heat Advisory, which is in effect from noon today to 7 PM EDT this evening. * HEAT INDEX VALUES...From 100 to 105 in southeast Pennsylvania and central New Jersey and 103 to 108 in Delaware, the Eastern Shore of Maryland, and southern New Jersey. * TIMING...This afternoon into early this evening. * IMPACTS...The heat and humidity may cause heat stress during outdoor exertion or extended exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Heat Advisory means that a period of hot temperatures is expected. The combination of hot temperatures and high humidity will combine to create a situation in which heat illnesses are possible. 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...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 light weight and loose fitting clothing when possible and drink plenty of water. 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
2 follow-up statements
446 WWUS71 KPHI 201322 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 922 AM EDT Thu Jul 20 2017 DEZ001-NJZ015-017>019-PAZ070-071-102-104-106-210200- /O.CON.KPHI.EH.W.0002.170720T1600Z-170722T0000Z/ 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 922 AM EDT Thu Jul 20 2017 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM EDT FRIDAY... * TEMPERATURES...High temperatures are forecast to be in the middle 90s both today and Friday. There will not be much relief at night with low temperatures in the 70s. * HEAT INDEX VALUES...Generally from 98 to 105 degrees during the afternoon hours today and Friday. * IMPACTS...The heat and humidity may cause heat stress during outdoor exertion or extended exposure. Excessive heat can be life-threatening among at-risk populations, such as children, the elderly, and those with pre-existing health conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to the early morning or the late evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear light weight and loose fitting clothing and be sure to drink plenty of water. 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 shaded location. Heat stroke is an emergency...call 9 1 1. An Excessive Heat Warning means that a prolonged period of very hot temperatures and high humidity will occur. The combination will create a dangerous situation in which heat related health problems may develop. Drink plenty of fluids, stay in an air conditioned environment, stay out of the sun and be sure to check on elderly relatives and neighbors. Young children and pets should never be left unattended in a vehicle under any circumstance. This is especially true during hot weather when a car's interior can reach lethal temperatures in a matter of minutes. && $$ DEZ002-003-MDZ008-012-015-019-020-NJZ009-010-012-013-016-020>023- 027-PAZ060>062-101-103-105-202300- /O.CON.KPHI.HT.Y.0004.170720T1600Z-170720T2300Z/ Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot-Caroline- Hunterdon-Somerset-Middlesex-Western Monmouth-Salem-Ocean- Cumberland-Atlantic-Cape May-Southeastern Burlington-Berks-Lehigh- Northampton-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Dover, Georgetown, Elkton, Chestertown, Centreville, Easton, Denton, Flemington, Somerville, New Brunswick, Freehold, Pennsville, Jackson, Millville, Hammonton, Cape May Court House, Wharton State Forest, Reading, Allentown, Bethlehem, Honey Brook, Oxford, Collegeville, Pottstown, Chalfont, and Perkasie 922 AM EDT Thu Jul 20 2017 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING... * HEAT INDEX VALUES...From 100 to 105 in southeast Pennsylvania and central New Jersey and 103 to 108 in Delaware, the Eastern Shore of Maryland, and southern New Jersey. * TIMING...This afternoon into early this evening. * IMPACTS...The heat and humidity may cause heat stress during outdoor exertion or extended exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Heat Advisory means that a period of hot temperatures is expected. The combination of hot temperatures and high humidity will combine to create a situation in which heat illnesses are possible. 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...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 light weight and loose fitting clothing when possible and drink plenty of water. 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. && $$
838 WWUS71 KPHI 201913 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 313 PM EDT Thu Jul 20 2017 DEZ001-NJZ015-017>019-PAZ070-071-102-104-106-210715- /O.CON.KPHI.EH.W.0002.000000T0000Z-170722T0000Z/ 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 313 PM EDT Thu Jul 20 2017 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM EDT FRIDAY... * TEMPERATURES...High temperatures are forecast to be in the middle 90s for the remainder of this afternoon and again on Friday. There will not be much relief overnight with temperatures mostly falling back into the 70s, but remaining near 80 in highly urbanized areas. * HEAT INDEX VALUES...Generally from 98 to 105 degrees during the afternoon hours today and on Friday. * IMPACTS...The heat and humidity may cause heat stress during outdoor exertion or extended exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to the early morning or the late evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear light weight and loose fitting clothing and be sure to drink plenty of water. 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 shaded location. Heat stroke is an emergency...call 9 1 1. An Excessive Heat Warning means that a prolonged period of very hot temperatures and high humidity will occur. The combination will create a dangerous situation in which heat related health problems may develop. Drink plenty of fluids, stay in an air conditioned environment, stay out of the sun and be sure to check on elderly relatives and neighbors. Young children and pets should never be left unattended in a vehicle under any circumstance. This is especially true during hot weather when a car's interior can reach lethal temperatures in a matter of minutes. && $$ DEZ002-003-MDZ008-012-015-019-020-NJZ009-010-012-013-016-020>023- 027-PAZ060>062-101-103-105-202300- /O.CON.KPHI.HT.Y.0004.000000T0000Z-170720T2300Z/ Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot-Caroline- Hunterdon-Somerset-Middlesex-Western Monmouth-Salem-Ocean- Cumberland-Atlantic-Cape May-Southeastern Burlington-Berks-Lehigh- Northampton-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Dover, Georgetown, Elkton, Chestertown, Centreville, Easton, Denton, Flemington, Somerville, New Brunswick, Freehold, Pennsville, Jackson, Millville, Hammonton, Cape May Court House, Wharton State Forest, Reading, Allentown, Bethlehem, Honey Brook, Oxford, Collegeville, Pottstown, Chalfont, and Perkasie 313 PM EDT Thu Jul 20 2017 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING... * HEAT INDEX VALUES...From 100 to 104 in southeast Pennsylvania and central New Jersey and 101 to 106 in Delaware, the Eastern Shore of Maryland, and southern New Jersey. * TIMING...This afternoon into early this evening. For Friday, Heat Index values will be in the upper 90s to 104 degrees. These values fall just under Heat Advisory criteria. * IMPACTS...The heat and humidity may cause heat stress during outdoor exertion or extended exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Heat Advisory means that a period of hot temperatures is expected. The combination of hot temperatures and high humidity will combine to create a situation in which heat illnesses are possible. 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...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 light weight and loose fitting clothing when possible and drink plenty of water. 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. && $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 5:35 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 55 min |
| Jul 20, 5:37 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 53 min |
| Jul 20, 6:22 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 53 min |
| Jul 20, 6:24 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 66 min |
| Jul 20, 7:00 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Carbon, Lehigh, Northampton | 60 min |
| Jul 20, 7:52 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 53 min |
| Jul 20, 7:31 PM EDT | Special Weather Statement | PHI | Morris | 29 min |
| Jul 20, 7:56 PM EDT | Special Weather Statement | PHI | Middlesex, Monmouth, Somerset | 49 min |
Nearby
Heat Advisories in New Jersey, 2017Heat Advisories in Pennsylvania, 2017Heat Advisories in Maryland, 2017Every heat advisory in 2017
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.