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Forecast Update
Posted Saturday 11/01/25 @ 8:49 AM — There may be some instability cloudiness north and west of the city about 1 PM. Some mid level clouds near the city about 5 PM. Overall, a very nice Fall day;
The ECMWF has joined the other models and has backed off on the showers for Monday, except for southeastern NJ.
Saturday Sunday Forecast
Originally Posted Fri 7:38 PM —Deepening low pressure that brought us the rain will be departing and high pressure building in will eventually reduce the pressure gradient and in turn reduce the wind speed and wind gust intensity.
Winds—
Saturday Forecast
Sunny but still breezy. A few clouds mid day and again later in the afternoon, especially from the city south and east.
NBM high temperatures: Blue Bell, PA 59 º Philadelphia, PA 60º
Slightly above average uncertainty (based on standard deviation): ± 1.5º
Sunday Forecast
A cold start. Mostly sunny and warmer. Winds subside.
NBM high temperatures: Blue Bell, PA 59º Philadelphia, PA 61º
Below average uncertainty (based on standard deviation): ± 1.1
An interesting scenario is set up for Monday, as most models have a coastal system moving to our southeast. The ECMWF and the German ICON model have showers moving in from the east late Monday; the GFS and Canadian GEM keep the showers away.
The ECMWF-AI has very light showers just reaching Philadelphia. Will have to see.