Philly Weekend Weather Forecast

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A sharp upper air trough will approach our area,  with its surface cold front moving through mid-day Saturday.  We will have a real taste of fall by late Saturday into Sunday.

For Friday night and Saturday, showers begin and continue into Saturday, ending around noontime. (The NAM continues chances of showers a bit later than the GFS.)   High 70.  Becoming windy and partly sunny/partly cloudy by late afternoon.

For Sunday, we will be affected by the pool of cool air aloft from the upper trough.  Changeable skies with considerable cloudiness is likely.  Breezy.  Very Cool.  High 60.

Weekend Forecast Outlook

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An unsettled weather pattern develops over the weekend, as a deep upper air trough in the middle of the country closes off over the Great Lakes and a cyclonic flow affects our area Saturday through the early part of next week.

The cold front associated with this upper trough moves through Saturday morning with some rain, ending about noon. The unstable cold flow aloft will bring windy conditions and instability cloudiness on Sunday.

Details on Friday.

Philadelphia Fall Winter Climate Outlook

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It’s time to make my annual fall forecast.

I always start my climate forecasts with a reiteration that climate prediction is very different than weather forecasting despite the appearance that they are similar. It’s an inexact science.

That said, there is an overwhelming allure among professional and amateur forecasters to attempt to predict trends in weather based on current weather patterns. So here goes.

It appears that we are experiencing a pattern change from the cold and wet pattern we had over the past year. We have just passed the second peak of the current solar cycle. This would signal a warm period for us, but the recent solar cycle expectedly peaked at a low level.

Nonetheless, we are beginning to see a pattern reminiscent of our last solar peak– increasingly dry conditions in the NE and milder temperatures. An increasing El Niño complicates the tendency towards much drier weather, but the current pattern suggests the solar influences will trump the El Niño influences.

So my climate forecast for this fall and early winter is for drier conditions and warmer milder temperatures. It doesn’t mean we’ll not see rain or snow or cold periods, but expect temperatures above average and almost drought conditions here in the NE.

Storm Forecasts & Other Things "up in the air".