920
FXUS61 KPHI 180653
AFDPHI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
253 AM EDT THU JUN 18 2026
WHAT HAS CHANGED
NO SIGNIFICANT CHANGES TO TODAY'S FORECAST.
ADDED A KEY MESSAGE FOR MONDAY.
KEY MESSAGES
1. WINDY AND WARM TODAY WITH A CHANCE FOR SCATTERED SHOWERS AND
THUNDERSTORMS. A FEW STORMS LATER THIS AFTERNOON COULD BE
STRONG TO SEVERE.
2. TIDE LEVELS WILL REMAIN ELEVATED THROUGH TONIGHT'S HIGH TIDE
CYCLE, WHICH MAY LEAD TO AREAS OF SPOTTY MINOR TO MINOR TIDAL
FLOODING.
3. A HIGH RISK FOR THE DEVELOPMENT OF RIP CURRENTS IS IN PLACE
FOR ALL JERSEY SHORE BEACHES TODAY; MODERATE RISK FOR THE
DELAWARE BEACHES.
4. A SYSTEM MOVES THROUGH SOMETIME MONDAY INTO MONDAY NIGHT,
LIKELY BRINGING WIDESPREAD RAINFALL TO THE AREA.
DISCUSSION
KEY MESSAGE 1...WINDY AND WARM TODAY WITH A CHANCE FOR SCATTERED
SHOWERS AND THUNDERSTORMS. A FEW STORMS LATER THIS AFTERNOON
COULD BE STRONG TO SEVERE.
A FEW SHOWERS THIS MORNING ARE EXPECTED, MAINLY NORTH AND WEST
OF THE I-95 CORRIDOR. THIS IS FROM DECAYING CONVECTION WELL OFF
TO THE WEST. NOT EXPECTING MUCH FROM THIS INITIAL ROUND OF
SHOWERS HOWEVER. IF ANYTHING, THE MORNING CLOUD COVER AND
SHOWERS WILL LIMIT THE SEVERE RISK FOR LATER THIS AFTERNOON.
LOW PRESSURE MOVES THROUGH ONTARIO TODAY AND INTO QUEBEC. THIS
WILL DRAG A COLD FRONT THROUGH OUR REGION, WITH SCATTERED
SHOWERS AND THUNDERSTORMS DEVELOPING OUT AHEAD OF THE FRONT. THE
GENERAL TREND CONTINUES TO BE A FASTER PROGRESSION WITH THE
SHORTWAVE, AND LESSER COVERAGE IN STORMS. THE SLIGHT RISK WAS
MAINTAINED HOWEVER GIVEN STRONG KINEMATICS ALOFT, STEEP LOW-
LEVEL LAPSE RATES, AND SOME INSTABILITY. THIS WILL RESULT IN ANY
STORM THAT DOES DEVELOP BEING CAPABLE OF PRODUCING DAMAGING WIND
GUSTS. THE LIMITING FACTORS FOR TODAY WILL BE THE BETTER FORCING
BEING OFF TO THE NORTH, AND INSTABILITY BEING LIMITED BY THE
MORNING SHOWERS AND CLOUD COVER. THE TIMEFRAME TO WATCH WILL BE
THIS AFTERNOON AND EVENING, FROM AROUND 1 PM TO 8-9 PM OR SO.
THINKING THE BIGGER STORY FOR TODAY WILL BE THE GUSTY WINDS. A
STRONG GRADIENT SETS UP WITH A DEEPENING SUB-1000 MB AREA OF LOW
PRESSURE MOVING BY TO THE NORTH AND A STRONG BERMUDA HIGH
OFFSHORE. THIS WILL RESULT IN BREEZY TO EVEN BRISK SOUTHWEST
WINDS, WHICH IS QUITE UNUSUAL FOR THIS TIME OF YEAR. SUSTAINED
WINDS WILL BE AROUND 15 TO 25 MPH WITH GUSTS OF 30 TO 40 MPH.
PEAK GUSTS SHOULD FALL JUST BELOW WIND ADVISORY CRITERIA, AROUND
45 MPH.
THE FINAL STORYLINE FOR TODAY WILL BE THE ONE-DAY SURGE IN
TEMPERATURES. AFTER A FEW DAYS OF SEASONAL TEMPERATURES, STRONG
WARM-AIR ADVECTION SETS UP FOR TODAY WITH BRISK SOUTHWESTERLY
FLOW. THIS WILL RESULT IN TEMPERATURES SURGING INTO THE UPPER
80S TO LOW 90S. THIS WILL ONLY LAST FOR TODAY THOUGH, WITH MORE
SEASONABLE TEMPERATURES EXPECTED THIS WEEKEND IN THE WAKE OF
TODAY'S FRONTAL PASSAGE.
KEY MESSAGE 2...TIDE LEVELS WILL REMAIN ELEVATED THROUGH THE
HIGH TIDE CYCLE TONIGHT, WHICH MAY LEAD TO AREAS OF SPOTTY MINOR
TO MINOR TIDAL FLOODING.
AFTER THE NEW MOON ON SUNDAY, THE ELEVATED ASTRONOMICAL TIDES
WILL CONTINUE TO SLOWLY SUBSIDE. HOWEVER, MINOR COASTAL FLOODING
IS STILL EXPECTED WITH TONIGHT'S HIGH TIDE, PRIMARILY ACROSS THE
SOUTHERN NJ ATLANTIC COAST AND PORTIONS OF THE DELAWARE BAY. A
COASTAL FLOOD ADVISORY HAS BEEN ISSUED FOR CAPE MAY, CUMBERLAND,
AND SALEM COUNTIES IN NJ, AS WELL AS NEW CASTLE COUNTY IN DE FOR
THE UPCOMING HIGH TIDE CYCLE.
KEY MESSAGE 3...A HIGH RISK FOR THE DEVELOPMENT OF RIP CORNETS
IS IN PLACE FOR ALL JERSEY SHORE BEACHES TODAY; MODERATE RISK
FOR THE DELAWARE BEACHES.
A RIP CURRENT STATEMENT HAS BEEN ISSUED FOR TODAY FOR ALL
JERSEY SHORE BEACHES.
FOR TODAY, SOUTH-SOUTHWEST WINDS WILL BE INCREASING TO AROUND
15 TO 25 MPH WITH GUSTS AS HIGH AS 25 TO 35 MPH IN THE
AFTERNOON. THERE WILL BE A SOUTHEASTERLY 4 TO 6 FOOT SWELL AT 6
TO 7 SECONDS. BREAKING WAVE HEIGHTS OF 2 TO 4 FEET ANTICIPATED
FOR THE JERSEY SHORE, WITH 1-3 FEET FOR DELAWARE BEACHES. AS A
RESULT, HAVE MAINTAINED THE HIGH RISK FOR THE JERSEY SHORE AND A
MODERATE RISK FOR THE DELAWARE BEACHES FOR THE DEVELOPMENT OF
DANGEROUS RIP CURRENTS.
FOR FRIDAY, WEST-SOUTHWESTERLY WINDS GENERALLY 5-15 MPH. THERE
WILL BE A SOUTH-SOUTHEASTERLY SWELL OF 3 TO 5 FEET AT AROUND 7
SECONDS. BREAKING WAVE HEIGHTS OF 1 TO 3 FEET ARE ANTICIPATED.
HAVE OPTED FOR A MODERATE RISK FOR THE JERSEY SHORE AND A LOW
RISK FOR DELAWARE BEACHES FOR THE DEVELOPMENT OF DANGEROUS RIP
CURRENTS, WHERE FLOW IS MORE OFFSHORE.
FOR SPECIFIC BEACH FORECASTS, VISIT WEATHER.GOV/BEACH/PHI
KEY MESSAGE 4...A SYSTEM MOVES THROUGH SOMETIME MONDAY INTO
MONDAY NIGHT, LIKELY BRINGING WIDESPREAD RAINFALL TO THE AREA.
MEDIUM RANGE GUIDANCE CONTINUES TO HINT AT A STRETCH OF
UNSETTLED WEATHER TO START NEXT WEEK. THE MAIN QUESTION WILL BE
THE TRACK OF THE LOW PRESSURE AS IT MOVES THROUGH THE REGION,
WHICH WILL HAVE SOME CONSEQUENCE IN SPECIFIC IMPACTS. THE MAIN
TAKEAWAY THOUGH IS THAT MONDAY IS CURRENTLY LOOKING QUITE WET,
WITH SOME THUNDERSTORMS LIKELY MIXED IN AS THE AREA OF LOW
PRESSURE MOVES THROUGH, MAINLY IN THE AFTERNOON. STILL A LOT OF
UNCERTAINTY THOUGH, BUT IT LOOKS INCREASINGLY LIKELY THAT SOME
SORT OF SYSTEM MOVES THROUGH TO START NEXT WEEK.
AVIATION /06Z THURSDAY THROUGH MONDAY/
THE FOLLOWING DISCUSSION IS FOR KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY AND SURROUNDING AREAS.
THROUGH 12Z...PRIMARILY VFR. MARINE STRATUS LAYER NEAR THE NJ
COAST WILL RESULT IN IFR CONDITIONS FOR KMIV/KACY THROUGH
DAYBREAK OR SO. MARINE LAYER UNLIKELY TO MAKE IT TO THE I-95
TERMINALS. LOW-LEVEL WIND SHEAR AT ALL TERMINALS THROUGH
12Z-13Z WITH A SOUTHWESTERLY LOW-LEVEL JET OVERHEAD PRODUCING
WINDS OF 35-45 KT AT FL020. WINDS OUT OF THE SOUTH/SOUTHEAST
AROUND 5 TO 10 KT. MODERATE CONFIDENCE.
TODAY...PRIMARILY VFR. REMOVED THE PROB30 GROUP AND REPLACED
WITH A TEMPO GROUP FOR SHOWERS. MODEL GUIDANCE CONTINUES TO
BACK OFF ON COVERAGE IN SHOWERS AND THUNDERSTORMS LATER TODAY.
CANNOT RULE IT OUT COMPLETELY, BUT THINK THE CHANCE IS LOW
ENOUGH (15-30%) TO LEAVE THUNDER OUT AT THIS TIME. ANY
THUNDERSTORMS WOULD COME THROUGH BETWEEN 16Z-22Z, FROM WEST TO
EAST. MAIN STORY WILL BE WINDS TODAY. WINDS START OUT OF THE
SOUTH/SOUTHWEST, INCREASING TO 10-15 KT AND GUSTS 20-25 KT.
WINDS GO MORE SOUTHWESTERLY BETWEEN 16Z-18Z WITH 15-20 KT WINDS
AND 25 TO 35 KT GUSTS THROUGH THE AFTERNOON AND EARLY EVENING.
MODERATE CONFIDENCE OVERALL.
TONIGHT...VFR. A FRONTAL PASSAGE WILL RESULT IN WINDS GOING MORE
WEST/NORTHWESTERLY, AROUND 10 KT THROUGH MOST OF THE NIGHT.
MODERATE CONFIDENCE.
OUTLOOK...
FRIDAY..VFR. WEST/NORTHWEST WIND GUSTS COULD GET NEAR 20 KT AT
TIMES.
FRIDAY NIGHT...VFR. NO SIGNIFICANT WEATHER
SATURDAY...VFR. WEST/NORTHWEST WIND GUSTS AROUND 20 TO 25 KT.
SATURDAY NIGHT THROUGH SUNDAY...VFR. NO SIGNIFICANT WEATHER.
MONDAY...SUB-VFR CONDITIONS EXPECTED WITH PERIODS OF RAIN AND
SCATTERED THUNDERSTORMS.
MARINE
A SMALL CRAFT ADVISORY IS IN EFFECT UNTIL MIDNIGHT TONIGHT.
WINDS PICK UP OUT OF THE SOUTHWEST WITH GUSTS AROUND 30 KT
THROUGH MOST OF THE DAY WITH SEAS OF 4 TO 7 FEET. A FEW GUSTS
NEAR 34 KT CANNOT BE RULED OUT, ESPECIALLY IN NEARSHORE AREAS
AND INLETS.
WINDS AND SEAS QUICKLY DIMINISH TONIGHT, AND SUB-SCA CONDITIONS
ARE EXPECTED BY DAYBREAK FRIDAY.
OUTLOOK...
FRIDAY THROUGH SUNDAY... WINDS AND SEAS CONTINUE TO DIMINISH
WITH NO MARINE HAZARDS ANTICIPATED.
MONDAY...ADVISORY CONDITIONS LIKELY DEVELOPING, WITH GUSTS OVER
25 KTS AND SEAS OVER 5 FEET.
RIP CURRENTS...SEE KEY MESSAGE 3 ABOVE.
PHI WATCHES/WARNINGS/ADVISORIES
PA...NONE.
NJ...COASTAL FLOOD ADVISORY UNTIL 4 AM EDT EARLY THIS MORNING FOR
NJZ016.
HIGH RISK FOR RIP CURRENTS FROM 8 AM EDT THIS MORNING THROUGH THIS
EVENING FOR NJZ014-024>026.
COASTAL FLOOD ADVISORY UNTIL 3 AM EDT EARLY THIS MORNING FOR
NJZ021-023.
DE...COASTAL FLOOD ADVISORY UNTIL 4 AM EDT EARLY THIS MORNING FOR
DEZ001.
MD...NONE.
MARINE...SMALL CRAFT ADVISORY FROM 6 AM THIS MORNING TO MIDNIGHT EDT
TONIGHT FOR ANZ430-431-450>455.
DISCUSSION...HOEFLICH
AVIATION...HOEFLICH
MARINE...HOEFLICH
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