289
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
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page