WWUS71 KPHI 190726
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
326 AM EDT Tue May 19 2026

DEZ001-NJZ015-017>019-PAZ070-071-102-104-106-192030-
/O.CON.KPHI.HT.Y.0001.000000T0000Z-260521T0000Z/
New Castle-Mercer-Gloucester-Camden-Northwestern Burlington-
Delaware-Philadelphia-Eastern Chester-Eastern Montgomery-Lower
Bucks-
Including the cities of Mount Holly, Cherry Hill, Camden, Media,
West Chester, Morrisville, Doylestown, Moorestown, Lansdale,
Glassboro, Norristown, Philadelphia, Trenton, Kennett Square, and
Wilmington
326 AM EDT Tue May 19 2026

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

* WHAT...Heat index values up to 98 degrees expected.

* WHERE...In Delaware, New Castle County. In New Jersey, Mercer, 
  Camden, Gloucester, and Northwestern Burlington Counties. In 
  Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, Lower 
  Bucks, and Philadelphia Counties.

* WHEN...Until 8 PM EDT Wednesday.

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

* ADDITIONAL DETAILS...Record setting high temperatures are quite 
  possible through Wednesday, with maximum heat indices nearing 100 
  degrees during peak heating each afternoon. Given the intensity of 
  this early season stretch of heat and humidity, we are not 
  acclimated to it yet and therefore impacts could be greater if 
  precautions are not taken. Showers and some thunderstorms arrive 
  later Wednesday afternoon and evening which will break this early 
  season 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.

&&

$$

NJZ007>010-PAZ060>062-101-103-105-192030-
/O.CON.KPHI.HT.Y.0001.000000T0000Z-260520T0000Z/
Warren-Morris-Hunterdon-Somerset-Berks-Lehigh-Northampton-Western
Chester-Western Montgomery-Upper Bucks-
Including the cities of Oxford, Morristown, Reading, Bethlehem,
Chalfont, Somerville, Washington, Collegeville, Honey Brook,
Perkasie, Flemington, Pottstown, Allentown, and Easton
326 AM EDT Tue May 19 2026

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

* WHAT...Heat index values up to 97 degrees expected.

* WHERE...In New Jersey, Morris, Somerset, Warren, and Hunterdon 
  Counties. In Pennsylvania, Berks, Lehigh, Northampton, 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...Record setting high temperatures are quite 
  possible through today, with maximum heat indices of 95 to near 
  100 degrees during peak heating this afternoon. Given the 
  intensity of this early season stretch of heat and humidity, we 
  are not acclimated to it yet and therefore impacts could be 
  greater if precautions are not taken. Showers and some 
  thunderstorms arrive Wednesday afternoon and evening which will 
  break this early season 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.

&&

$$

NJZ012-013-020-027-192030-
/O.CON.KPHI.HT.Y.0001.000000T0000Z-260521T0000Z/
Middlesex-Western Monmouth-Ocean-Southeastern Burlington-
Including the cities of New Brunswick, Jackson, Freehold, and
Wharton State Forest
326 AM EDT Tue May 19 2026

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

* WHAT...Heat index values up to 98 degrees expected.

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

* WHEN...Until 8 PM EDT Wednesday.

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

* ADDITIONAL DETAILS...Record setting high temperatures are quite 
  possible through Wednesday, with maximum heat indices nearing 100 
  degrees during peak heating each afternoon. Given the intensity of 
  this early season stretch of heat and humidity, we are not 
  acclimated to it yet and therefore impacts could be greater if 
  precautions are not taken. Showers and some thunderstorms arrive 
  later Wednesday afternoon and evening which will break this early 
  season 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.

&&

$$

AKL