514
FXUS61 KPHI 232308
AFDPHI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
708 PM EDT THU APR 23 2026
WHAT HAS CHANGED
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
1. FRIDAY WILL BE COOLER WITH LESS WIND AND HIGHER HUMIDITY
LEVELS COMPARED TO TODAY.
2. LOW PRESSURE WILL PASS THROUGH THE REGION THIS WEEKEND WITH
WIDESPREAD SHOWERS AND SEASONABLY CHILLY TEMPERATURES.
DISCUSSION
KEY MESSAGE 1...FRIDAY WILL BE COOLER WITH LESS WIND AND HIGHER
HUMIDITY LEVELS COMPARED TO TODAY.
WINDS WILL CONTINUE TO DIMINISH THIS EVENING WITH THE LOSS OF
DAYTIME HEATING. OTHERWISE, THE HIGH TO OUR NORTH ALONG WITH LOW
PRESSURE EAST OF THE CANADIAN MARITIMES WILL HELP DRIVE A
BACKDOOR COLD FRONT SOUTHWARD THROUGH THE AREA OVERNIGHT INTO
EARLY FRIDAY. THIS WILL ALSO BRING SOME INCREASING CLOUD COVER.
FOR FRIDAY, EXPECT PARTLY TO MOSTLY CLOUDY SKIES WITH LIGHT NE
WINDS AND COOLER TEMPERATURES COMPARED TO TODAY. HIGHS WILL BE
MAINLY IN THE 60S TO AROUND 70 EXCEPT COOLER NEAR THE COAST AND
A BIT WARMER OVER OUR EASTERN MD COUNTIES IN DELMARVA SINCE THIS
WILL BE CLOSER TO THE FRONT. THE COOLER TEMPERATURES WILL
RESULT IN HUMIDITY LEVELS BEING HIGHER THAN TODAY ALONG WITH
LIGHTER WINDS SO WE DON'T EXPECT THERE TO BE FIRE WEATHER
CONCERNS.
KEY MESSAGE 2...LOW PRESSURE WILL PASS THROUGH THE REGION THIS
WEEKEND WITH WIDESPREAD SHOWERS AND SEASONABLY CHILLY TEMPERATURES.
HIGH PRESSURE WILL BE SETTLED OVER EASTERN CANADA, AND THE BASE OF
THIS HIGH WILL EXTEND DOWN INTO THE NORTHEAST. AS A RESULT, WINDS
WILL TAKE ON AN EASTERLY FLOW STARTING FRIDAY NIGHT, AND ONSHORE
FLOW WILL PERSIST THROUGH MOST OF THE WEEKEND. THIS WILL USHER A
CHILLY AIRMASS INTO THE REGION DUE TO OCEAN TEMPERATURES 50S. HIGH
TEMPERATURES SATURDAY AND SUNDAY WILL BE IN THE 50S WITH LOWS IN THE
40S.
LOW PRESSURE WILL ORGANIZE AND DEVELOP OVER THE GREAT LAKES FRIDAY
NIGHT AND WILL DIVE TOWARDS THE DELMARVA PENINSULA AND THE MID-
ATLANTIC ON SATURDAY BEFORE DEPARTING THROUGHOUT THE DAY SUNDAY.
SHOWERS DEVELOP SATURDAY NIGHT, AND THEN CONTINUES THROUGHOUT THE
DAY SATURDAY AND SATURDAY NIGHT. WILL KEEP CHANCE POPS FOR SUNDAY
MORNING AS THAT LOW DEPARTS.
THIS ALL SETS UP A RAW, BREEZY, WET WEEKEND.
RAINFALL TOTALS THIS WEEKEND, AT LEAST FROM FRIDAY NIGHT THROUGH
SATURDAY NIGHT, WILL RANGE FROM 1 TO 1.25 INCHES ACROSS THE SOUTHERN
POCONOS, NORTHERN NEW JERSEY, AND THE LEHIGH VALLEY, AND FROM 1/2 TO
1 INCH ACROSS THE DELAWARE VALLEY, INCLUDING PHILADELPHIA, SOUTHERN
NEW JERSEY, AND DELMARVA. WHILE THIS MAY BE UNPLEASANT, ESPECIALLY
SINCE IT WILL BE OVER THE WEEKEND, IT IS GOOD TO REMEMBER THAT THIS
IS A BENEFICIAL RAINFALL.
AVIATION /00Z FRIDAY THROUGH TUESDAY/
THE FOLLOWING DISCUSSION IS FOR KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY AND SURROUNDING AREAS.
TONIGHT...VFR WITH MAINLY HIGH CLOUDS. NORTHWEST WINDS WILL
VEER TO NORTHEAST THROUGH 03-06Z, GENERALLY 5 KT OR LESS. CALM
PERIODS ARE POSSIBLE. HIGH CONFIDENCE.
FRIDAY...VFR WITH BKN MID-LEVEL CLOUDS AT TIMES. WINDS
GENERALLY NORTHEAST AROUND 5 KT. FOR MIV AND ACY, WINDS WILL
LIKELY BECOME SOUTHEAST AT 5-10 KT AFTER 18-20Z. MODERATE
CONFIDENCE.
OUTLOOK...
FRIDAY NIGHT...SUB-VFR CONDS IN STRATUS AND SHRA DEVELOP LATE.
SATURDAY THROUGH SATURDAY NIGHT...SUB-VFR CONDS IN SHRA, PATCHY FOG,
AND LOW STRATUS.
SUNDAY...LINGERING SUB-VFR CONDS IN SHRA/STRATUS IN THE MORNING.
GRADUAL IMPROVEMENT LATE.
SUNDAY NIGHT THROUGH MONDAY NIGHT...VFR. NSW.
TUESDAY...SUB-VFR CONDS IN SHRA/STRATUS.
MARINE
SUB-SMALL CRAFT ADVISORY CONDITIONS THROUGH FRIDAY. WINDS WILL
GENERALLY BE AROUND 10 KNOTS OR LESS WITH SEAS GENERALLY 2 TO 4
FEET TODAY THROUGH FRIDAY.
OUTLOOK...
FRIDAY NIGHT...SUB-SCA CONDITIONS. VSBY RESTRICTIONS IN SHOWERS
DEVELOPING LATE.
SATURDAY THROUGH SUNDAY NIGHT...SCA CONDITIONS WILL DEVELOP ON
SATURDAY WITH 15 TO 20 KT WINDS WITH 25 TO 30 KT GUSTS AND SEAS 6 TO
8 FT. CANNOT RULE OUT A FEW BRIEF GALE FORCE GUSTS, MAINLY ON THE
NEW JERSEY OCEAN WATERS, SUNDAY AFTERNOON. VSBY RESTRICTIONS IN RAIN
AND FOG.
MONDAY THROUGH MONDAY NIGHT...SCA CONDITIONS, MOSTLY FOR 5 TO 6 FT
SEAS ON MONDAY, CONDITIONS SUBSIDE TO SUB-SCA CONDITIONS MONDAY
NIGHT.
TUESDAY...SUB-SCA CONDITIONS LIKELY.
PHI WATCHES/WARNINGS/ADVISORIES
PA...NONE.
NJ...NONE.
DE...NONE.
MD...NONE.
MARINE...NONE.
DISCUSSION...COOPER/FITZSIMMONS/MPS
AVIATION...COOPER/FITZSIMMONS/MPS
MARINE...FITZSIMMONS/MPS
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page