Hello, my name is John Flecher and I am part of the new Team NNJWX, I will be the forecaster for the southern half of the forecast area and will cover the Philadelphia metropolitan area which includes all of southern NJ and also through southeastern PA.
We have a pretty big weekend coming up with last minute holiday shopping and all and the weather will do its job by cooperating with us after the parade of winter storms we had including a major winter storm last Saturday (although not so much for this part of the forecast area) this weekend will be the complete opposite
For the remainder of our Friday we will see highs in the lower to mid 50s around the Philadelphia metro with periods of clouds as warmer air comes in, tonight we will fall towards the lower to middle 40s around the area with the threat of fog as warm air overrides the snow pack. There could be some patchy late night drizzle as well with the warm air overtaking
For our Saturday we expect similar sky conditions to today , just a bit more cloudy with the threat of morning fog but peeks of sun possible in the afternoon, highs are expected to be in the middle to upper 50s around the area, there could be an isolated 60 degree reading if there’s more sun than expected so clearly a VERY warm December weekend setting up , we cant rule out a isolated shower in extreme NW portions of the area as a strong cold front stalls well west of us with waves of low pressure riding it but the Southeastern Ridge should keep the front far enough away to keep the rain away
Sunday will be the warmest day , as the cold front slowly approaches a strong southwest wind will develop with highs reaching, the 60s area wide, low 60s along the southern NJ coast , mid to upper 60s interior southern NJ and Philly and then lower to mid 60s in the western suburbs! We will see a chance of increasing showers from west to east especially towards the evening hours
We can see this pattern shift occurring at 500 mb with a large dip in the jet stream over the western US and a major storm getting ready to track from the Desert SW up through the Midwest and into Southeast Canada, and of course a developing Southeastern Ridge transporting warm air from the Gulf of Mexico up through the eastern 1/3 of the nation.
On Monday this front will swing through with scattered showers and highs again expected to be in the 60s area wide but highs should occur early in the morning , then a much colder air mass takes hold for the holidays with highs on Christmas Eve and Christmas both in the lower to middle 30s with a breezy northwest wind as a new polar air mass takes hold