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Philadelphia Weekend Weather and Storm Forecasts

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

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Glenn F Schreiber
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Fri, 22 May 2009
Memorial Weekend Weather Outlook- Fri PM
The upcoming weekend's weather will be influenced by the difficult to predict position of a weak (frontal) boundary and wind shift between two areas of high pressure- a large Bermuda high to our south and another high pressure system that will essentially stay to our north. Around the northern high will be an easterly flow near us and around the Bermuda high will be an opposite southwesterly flow. Often, this interaction results in formation of distinct areas of low pressure, but the GFS shows no such distinct development.
Instead, the GFS shows diffuse areas of light showers within this boundary area, without specific timing or exact triggers. As mentioned in my last update, this can produce weather ranging from sun, clouds, drizzle, showers. The latest models suggest that Saturday will have the most sun. Showers, if any, should occur late.
Sat 5/23: Partly to mostly sunny with a chance of very light scattered showers, most likely later in the afternoon. High near 83.
Sun 5/24: Partly sunny in the morning, increasingly cloudy in the afternoon with showers, mostly likely later in the afternoon. High near 84.
Mon 5/25: Mostly cloudy with a higher chance of showers. Some clearing possible late. High 73.

Solar Weather: The slight recent increase in solar activity has died down and the single sunspot has disappeared. Solar activity remains low enough to continue to forecast cooler than normal weather for the balance of the spring and some much of the summer.
See microblog updates and commments about the current weather on Twitter.com Follow me as: theweatherguy

posted: May 22 2009 at 11:04 pm

[/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.

The weatherguy.net home page has been visited times since October 2003.

theweatherguy's website
		Philadelphia Weekend Weather and Storm Forecasts
Glenn F. Schreiber DMD and Glenn Schreiber is theweatherguy writing about Philadelphia Weather [radar] [surface map] [disclaimer]
	About this blog theweatherguy's website, "Thoughts and comments on Philadelphia Weather and Daily Life." Glenn F Schreiber aka "theweatherguy" Photos Weather Definitions Copy link for RSS feed Links These are a few of my favorite links. National Weather Service Official Forecasts Meteorology Glossary Archives Weather Archives: 13: Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec 12: Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec 11: Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec 10: Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec 09: Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec 08: Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec 07: Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec 06: Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec 05: Apr May Jun July Aug Sept Oct Nov Dec Commentary: Miscellaneous Find	Fri, 22 May 2009 Memorial Weekend Weather Outlook- Fri PM The upcoming weekend's weather will be influenced by the difficult to predict position of a weak (frontal) boundary and wind shift between two areas of high pressure- a large Bermuda high to our south and another high pressure system that will essentially stay to our north. Around the northern high will be an easterly flow near us and around the Bermuda high will be an opposite southwesterly flow. Often, this interaction results in formation of distinct areas of low pressure, but the GFS shows no such distinct development. Instead, the GFS shows diffuse areas of light showers within this boundary area, without specific timing or exact triggers. As mentioned in my last update, this can produce weather ranging from sun, clouds, drizzle, showers. The latest models suggest that Saturday will have the most sun. Showers, if any, should occur late. Sat 5/23: Partly to mostly sunny with a chance of very light scattered showers, most likely later in the afternoon. High near 83. Sun 5/24: Partly sunny in the morning, increasingly cloudy in the afternoon with showers, mostly likely later in the afternoon. High near 84. Mon 5/25: Mostly cloudy with a higher chance of showers. Some clearing possible late. High 73. Solar Weather: The slight recent increase in solar activity has died down and the single sunspot has disappeared. Solar activity remains low enough to continue to forecast cooler than normal weather for the balance of the spring and some much of the summer. See microblog updates and commments about the current weather on Twitter.com Follow me as: theweatherguy posted: May 22 2009 at 11:04 pm [/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. The weatherguy.net home page has been visited times since October 2003.