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Glenn F. Schreiber DMD and Glenn Schreiber is theweatherguy writing about Philadelphia Weather [radar] [surface map] [disclaimer]
   

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  • Glenn F Schreiber
    aka "theweatherguy"

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    Fri, 15 May 2009

    Philadelphia Weekend Weather Forecast - Fri PM
    An approaching cold front on Saturday afternoon will bring rain through Saturday night into the first half of Sunday. It seems possible that the models might be over-extending the rain into mid day Sunday, so I think there is uncertainty about when the rain will stop.

    Sat 5/16: Chance of a brief light shower early, then cloudy with some breaks in the overcast skies possible in the morning, then cloudy by afternoon. Showers and thunderstorms move in, most likely between 3 and 5 PM and continues through the night. High 77

    Sun 5/17: Cloudy with showers and thunderstorms during most of the morning, ending about noon. Some clearing possible during the mid to late afternoon. Windy and cool. High 60.

    There's been the first increase in solar flux in over a year with the recent development of some active regions of sun producing the first sunspot in awhile. The solar flux has increased just a bit. Solar Cycle 24 is probably starting now. Solar activity remains low enough to continue the forecast of cooler than normal weather overall.

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    posted: May 15 2009 at 6:42 pm

    [/weather/may09] permanent link

    Philadelphia Weekend Weather Forecast - Fri AM
    The difficult to pin down pattern of frontal passages over the weekend remains a bit elusive, but I'll try to give a forecast.

    The front that moved through last night will be far enough south to keep much of Friday and and most of Saturday without rain. However, any sun today (Friday) could cause enough stability to set off a thunderstorm. A cold front will move through late Saturday bringing showers and thunderstorms. Still some uncertainty with details with this forecast.

    Sat 5/16: Cloudy but with some breaks in the overcast skies possible in the morning. Chance of showers and thunderstorms by afternoon. Exact timing uncertain, but increasingly probable late afternoon. High 76

    Sun 5/17: Cloudy with showers and thunderstorms ending during most of the morning. Some clearing possible during the mid to late afternoon. Cool. High 64.

    There's been the first increase in solar flux in over a year with the recent development of some active regions of sun producing the first sunspot in awhile. The solar flux has increased just a bit. Solar Cycle 24 is probably starting now. Solar activity remains low enough to continue the forecast of cooler than normal weather overall.

    See microblog updates and commments about the current weather on
    Twitter.com Follow me as: theweatherguy


    posted: May 15 2009 at 6:06 am

    [/weather/may09] permanent link



    Disclaimer: I am not a meteorologist and provide this information as a hobby and for entertainment (mostly my own :-) . While attempts are made to predict the weather as best as I can, use at your own risk! I am NOT responsible for any direct or indirect consequential injury/damages due to your use of these forecasts. Always check the NWS Official Forecast for your final plans.

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