043
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 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.
GORSE
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page