WWUS71 KPHI 191825
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
225 PM EDT Tue May 19 2026

NJZ007>010-PAZ060>062-101-103-105-200900-
/O.EXT.KPHI.HT.Y.0001.000000T0000Z-260521T0000Z/
Warren-Morris-Hunterdon-Somerset-Berks-Lehigh-Northampton-Western
Chester-Western Montgomery-Upper Bucks-
Including the cities of Oxford, Allentown, Chalfont, Morristown,
Collegeville, Pottstown, Flemington, Easton, Washington,
Somerville, Honey Brook, Perkasie, Reading, and Bethlehem
225 PM EDT Tue May 19 2026

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

* 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 Wednesday.

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

* ADDITIONAL DETAILS...Maximum heat indices near 100 degrees during 
  peak heating this afternoon and then around 95 degrees Wednesday. 
  Given the intensity of this early season stretch of heat and 
  humidity, we are not fully acclimated to it and therefore impacts 
  could be greater if precautions are not taken. Showers and some 
  thunderstorms arrive Wednesday afternoon and evening which will 
  end 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.

&&

$$

DEZ001-NJZ015-017>019-PAZ070-071-102-104-106-200900-
/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 Wilmington, Trenton, Philadelphia,
Lansdale, Cherry Hill, Media, Mount Holly, Norristown,
Morrisville, Camden, Kennett Square, West Chester, Moorestown,
Doylestown, and Glassboro
225 PM EDT Tue May 19 2026

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

* WHAT...Heat index values up to 99 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...Maximum heat indices near 100 degrees during 
  peak heating this afternoon and then again on Wednesday. Given the 
  intensity of this early season stretch of heat and humidity, we 
  are not fully acclimated to it and therefore impacts could be 
  greater if precautions are not taken. Showers and some 
  thunderstorms arrive later Wednesday afternoon and evening which 
  will end 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.

&&

$$

NJZ012-013-020-027-200900-
/O.CON.KPHI.HT.Y.0001.000000T0000Z-260521T0000Z/
Middlesex-Western Monmouth-Ocean-Southeastern Burlington-
Including the cities of Wharton State Forest, New Brunswick,
Freehold, and Jackson
225 PM EDT Tue May 19 2026

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

* WHAT...Heat index values up to 99 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...Maximum heat indices near 100 degrees during 
  peak heating this afternoon and then again on Wednesday. Given theintensity of this early season stretch of heat and humidity, we 
  are not fully acclimated to it and therefore impacts could be 
  greater if precautions are not taken. Showers and some 
  thunderstorms arrive later Wednesday afternoon and evening which 
  will end 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.

&&

$$

Gorse