7:00 AM | ***Back-to-back soaking rain events from today to early Monday and winds will be a noticeable factor with both systems...watch for potential flooding along coastal New Jersey***
Paul Dorian
6-Day forecast for the Philadelphia, PA metro region
Today
Mainly cloudy, cool, becoming windy, periods of rain from mid-to-late morning on through the day, maybe a late day thunderstorm, some of the rain will be heavy at times, watch for localized flooding, highs in the mid-to-upper 50’s (normal high now at PHL is 69 degrees); E-SE winds increasing to around 10-20 mph; late day gusts possible to 30 mph
Tonight
Mainly cloudy, windy, chilly, periods of rain, maybe a thunderstorm, some of the rain will be heavy at times, watch for localized flooding, lows in the upper 40’s
Saturday
Mainly cloudy, cool, windy, occasional rain or drizzle, upper 50’s
Saturday Night
Mainly cloudy, chilly, breezy, occasional showers or drizzle, maybe a thunderstorm, lower 50’s for late night lows
Sunday
Mainly cloudy, breezy, a bit milder, periods of rain that will continue on Sunday night, maybe a thunderstorm, some of the rain can be heavy at times, mid 60’s
Monday
Mainly cloudy early then becoming mainly sunny, breezy, cool, near 60 degrees
Tuesday
Partly sunny, breezy, unusually cool for the early part of May, chance of showers, mid-to-upper 50’s
Wednesday
Partly sunny, cool, breezy, maybe a shower, near 60 degrees
Discussion
Rain associated with a northeastward moving storm system will spread into the Philly metro region later this morning and it’ll continue into the day on Saturday. Some of the rain will become heavy at times, watch for localized flooding, and winds will increase in strength from an east-to-southeast direction. In fact, at the height of the storm, flooding may become an issue along coastal sections of New Jersey given the fact that a stiff east-to-southeast flow of air will continue for a several hour period.
By the time we get to the second half of the weekend, a multitude of upper-level lows will begin to consolidate into one as the northernmost system will become the dominant player and acts to “absorb” the other lows. The end result will be one deep upper-level low by the early part of next week centered over the eastern Great Lakes. At the surface (and very similar to the first system on Friday and Saturday), an initial (primary) low will push towards the Great Lakes and a secondary storm will form near the Mid-Atlantic coastline by late Sunday night/early Monday. As with the first event, this second one will result in soaking rains for the Philly metro region and winds will become quite a noticeable factor as well. An unusually chilly air mass for early May will follow the second storm for the first half of next week and instability showers may take place from time-to-time.
Meteorologist Paul Dorian
Arcfield Weather