275
WWUS71 KPHI 180652
NPWPHI
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
252 AM EDT MON MAY 18 2026
NJZ015-017>019-PAZ070-071-104-106-182015-
/O.NEW.KPHI.HT.Y.0001.260518T1600Z-260520T0000Z/
MERCER-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-DELAWARE-
PHILADELPHIA-EASTERN MONTGOMERY-LOWER BUCKS-
INCLUDING THE CITIES OF NORRISTOWN, CHERRY HILL, TRENTON,
PHILADELPHIA, CAMDEN, GLASSBORO, MOORESTOWN, DOYLESTOWN,
MORRISVILLE, MOUNT HOLLY, LANSDALE, AND MEDIA
252 AM EDT MON MAY 18 2026
..HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM EDT TUESDAY
* WHAT...HEAT INDEX VALUES UP TO 97 DEGREES EXPECTED.
* WHERE...IN NEW JERSEY, MERCER, CAMDEN, GLOUCESTER, AND
NORTHWESTERN BURLINGTON COUNTIES. IN PENNSYLVANIA, DELAWARE,
EASTERN MONTGOMERY, LOWER BUCKS, AND PHILADELPHIA COUNTIES.
* WHEN...FROM NOON TODAY TO 8 PM EDT TUESDAY.
* IMPACTS...HOT TEMPERATURES AND HIGH HUMIDITY MAY CAUSE HEAT
ILLNESSES.
* ADDITIONAL DETAILS...RECORD SETTING TEMPERATURES POSSIBLE THROUGH
WEDNESDAY. TUESDAY WILL LIKELY BE THE HOTTEST DAY WITH HIGHS IN
THE MID 90S THROUGHOUT THE URBAN CORRIDOR.
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
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