Update Sun 05/07 @ 9:38 AM — Very light showers are forecast to move in between 6 and 8 PM. Any showers will be very light. Several models have the showers bypassing the immediate PHL area, going to the north and south of us. Highs today: 76º Blue Bell, 77º Philadelphia ( ± 1º)
Update Sat 5/06 @ 8:36 PM — Not much change in my forecast from Friday. Sunshine early, then sunshine through high clouds during the late morning and early afternoon. Clouds thicken between 3-5 PM. Chance of light showers moving in between 6 PM and 8 PM, earlier far west. High 74-76°.
The upper low associated with the blocked pattern for more than a week has finally moved off to our east.
An upper level high pressure ridge has moved in and it will provide more spring-like temperatures. Disturbances moving in from the west will rise over the ridge and move in from the northwest.
For the weekend, these disturbances are expected to stay west of us as they move across the upper ridge according to the NAM and GFS—
Today’s 12z NAM forecast for 2 PM Sunday. A disturbance in western PA will not get here until late Sunday evening, according to the NAM (Click on image for larger view.)
There isn’t high confidence in the above Sunday forecast. The ECMWF, ICON and CMC have showers moving in further north and as early as mid afternoon.
Previously Posted Fri 6:45 PM —
Saturday
Early morning cloudiness gives way to sunny skies.
High temperature 68.9º sd 1.4º ( NBM model location Blue Bell, PA)
Sunday
Sunny in the morning, increasing cloudiness in the afternoon. Light showers wait until late evening
High temperature 74.7º sd 1.6º ( NBM model location Blue Bell, PA)
