983
FXUS61 KPHI 240531
AFDPHI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
131 AM EDT FRI APR 24 2026
WHAT HAS CHANGED
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
1. TODAY WILL BE COOLER WITH LESS WIND AND HIGHER HUMIDITY
LEVELS COMPARED TO YESTERDAY.
2. LOW PRESSURE WILL PASS THROUGH THE REGION THIS WEEKEND WITH
WIDESPREAD SHOWERS AND SEASONABLY CHILLY TEMPERATURES.
DISCUSSION
KEY MESSAGE 1...TODAY WILL BE COOLER WITH LESS WIND AND HIGHER
HUMIDITY LEVELS COMPARED TO YESTERDAY.
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 THIS MORNING. THIS WILL ALSO BRING
SOME INCREASING CLOUD COVER. EXPECT PARTLY TO MOSTLY CLOUDY
SKIES WITH LIGHT NE WINDS AND COOLER TEMPERATURES COMPARED TO
YESTERDAY. 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 /06Z FRIDAY THROUGH TUESDAY/
THE FOLLOWING DISCUSSION IS FOR KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY AND SURROUNDING AREAS.
THRU 12Z THIS MORNING...VFR WITH MAINLY HIGH CLOUDS. NORTHEAST
WINDS GENERALLY 5 KT OR LESS. CALM PERIODS ARE POSSIBLE. HIGH
CONFIDENCE.
TODAY...VFR WITH BKN MID-LEVEL CLOUDS AT TIMES. WINDS NORTHEAST
SHIFTING TO SOUTHEAST 5-10 KT. MODERATE CONFIDENCE.
TONIGHT...MOSTLY VFR, BUT WITH LOWERING CIGS, POSSIBLY BECOMING
MVFR BY DAWN. SHOWERS POSSIBLE IN THE EVENING WILL BE MORE
LIKELY TOWARD DAWN. WINDS SOUTHEAST, SHIFTING EAST, 5-10 KTS.
MODERATE CONFIDENCE.
OUTLOOK...
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 TONIGHT. WINDS WILL
GENERALLY BE AROUND 10 KNOTS OR LESS WITH SEAS GENERALLY 2 TO 4
FEET THROUGH TONIGHT.
OUTLOOK...
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/RCM
AVIATION...COOPER/FITZSIMMONS/MPS/RCM
MARINE...FITZSIMMONS/MPS/RCM
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