922 FXUS61 KPHI 040521 AFDPHI Area Forecast Discussion National Weather Service Mount Holly NJ 121 AM EDT Fri Jul 4 2025 .SYNOPSIS... A reinforcing cold front will drop through the region tonight. Dry high pressure will build into the region on Friday and remain in control through the weekend, providing seasonable temperatures and tranquil weather conditions. Warmer, more humid, and unsettled conditions will return early next week. && .NEAR TERM /THROUGH TODAY/... For the rest of tonight, the front will make its way off the coast, giving way to a mostly clear sky. Lows should fall into the 50s and 60s. For Independence Day, a rather pleasant and dry day is expected. A high pressure system builds into the region and will keep the day dry and sunny. The post frontal regime after today`s cold front will translate to temperatures mainly in the low to mid 80s and comfortable humidity values with dew points in the 50s. && .SHORT TERM /TONIGHT THROUGH SUNDAY NIGHT/... Dry and seasonable weather conditions expected for the rest of the holiday weekend. High pressure overhead Friday night will result in clear skies and calm winds, a great setup for strong radiational cooling night. As a result, we will likely see the coolest and most comfortable summer night in quite some time, with lows in the mid 50s to mid 60s and a dry airmass in place. The broad ridging will dominate the region over the weekend, which will keep convection suppressed and temperatures near normal, though temperatures will start trending upward a couple degrees each day. Saturday will be another very pleasant day, similar to Friday as the surface high slides overhead. High temperatures remaining in the mid to upper 80s under sunny skies and dewpoints mixing out nicely once again to provide us with some low humidity. By Sunday, high pressure will be located offshore, resulting in some return flow and thus a more sensible increase in temperatures and humidity levels compared to the previous days. Highs Sunday in the upper 80s to low 90s. Lows in the 60s to near 70 degrees both nights. && .LONG TERM /MONDAY THROUGH THURSDAY/... Return flow will continue into the first half of next week as upper ridging shifts out to sea and some troughing develops near the Great Lakes. This will result in more unsettled conditions developing again, with mostly diurnally driven chances for showers and thunderstorms. Any severe threats remain to be seen. The greatest chances for showers and storms currently looks to be Tuesday and Wednesday. Expect temperatures to start trending slightly above normal early next week as well, though they should moderate some toward the middle of the week. Highs in the mid 80s to low 90s and lows in the mid 60s to mid 70s, along with increasing humidity. && .AVIATION /05Z FRIDAY THROUGH TUESDAY/... The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas. Through 12Z...VFR & SKC. Patchy areas of mist possible at KRDG/KABE. West-northwest winds around 5 kt or less. High confidence. Friday...VFR & SKC. Northwest winds around 5-10 kt. Sea breeze possible at KACY, which may cause winds to become southerly in the afternoon. High confidence. Friday night...VFR & SKC. North-northwest winds around 3 kt or less, becoming variable/calm at times. High confidence. Outlook... Saturday through Sunday...VFR. No significant weather. Monday and Tuesday...Prevailing VFR. Isolated thunderstorms possible. && .MARINE... No marine headlines are in effect through Friday. North- northwest winds around 10-15 kt with the passing of a cold front, becoming south-southeast winds around 5-10 kt in the afternoon. Seas of 2-3 feet. Fair weather. Outlook... Saturday through Monday...No marine hazards expected. Rip Currents... For Independence Day, north winds around 10 mph in the morning will become southeast around 5-10 mph in the afternoon. Breaking wave heights of 1-2 feet with a SSE swell of around 2 feet and a 6-8 second period. As a result, have opted to go with a LOW risk for dangerous rip currents for all beaches. For Saturday, light northeast winds in the morning will become south-southeast around 10 mph in the afternoon. Breaking wave heights generally 1-2 feet with a SE swell of around 2 feet and a 6-8 second period. As a result, will maintain a LOW risk for dangerous rip currents for all beaches. && .PHI WATCHES/WARNINGS/ADVISORIES... PA...None. NJ...None. DE...None. MD...None. MARINE...None. && $$ SYNOPSIS...MJL/Staarmann NEAR TERM...DeSilva/Guzzo/RCM SHORT TERM...MJL/Staarmann LONG TERM...MJL/Staarmann AVIATION...DeSilva/Guzzo/MJL/RCM MARINE...DeSilva/Guzzo/MJL