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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
aka "theweatherguy"

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Sun, 09 Aug 2009
Philadelphia Weekend Weather Forecast-Sun AM
I used Tweeter to update some forecast changes earlier this morning. Follow me as theweatherguy for this these last minute changes.
Here's the current scoop: The forecast is looking quite different today. Not surprised, since the models often get warm front-related forecasts wrong. I've been saying this since Thursday.
The front lingers over us at this time. An upper air NW flow is bringing areas of disturbance (areas of vorticity) along the frontal boundary, setting off shower and thunderstorms. Both models had this wrong and both models differ with forecast details for today.
The GFS has us clearing out while the NAM continues to have showers and thunderstorms develop during the day and afternoon. The GFS MOS has a 23% chance of rain during the day, the NAM MOS has a 70% chance.
It's not certain if we'll see sun this afternoon or not. More likely, we'll see some bright skies breaks of sun and but with it, the development of instability and more thunderstorms.
Sun 8/9: Mostly cloudy with continued chance of showers and thunderstorms. There likely will be a few bright spots and possibly sunny breaks during the afternoon, but any sunshine will increase instability and result in more thunderstorms. Humid. High 85.
Read my most recent climate discussion here.
Follow me on Twitter as theweatherguy for quick updates and weather observations.

posted: Aug 09 2009 at 9:23 am

[/weather/aug09] 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	Sun, 09 Aug 2009 Philadelphia Weekend Weather Forecast-Sun AM I used Tweeter to update some forecast changes earlier this morning. Follow me as theweatherguy for this these last minute changes. Here's the current scoop: The forecast is looking quite different today. Not surprised, since the models often get warm front-related forecasts wrong. I've been saying this since Thursday. The front lingers over us at this time. An upper air NW flow is bringing areas of disturbance (areas of vorticity) along the frontal boundary, setting off shower and thunderstorms. Both models had this wrong and both models differ with forecast details for today. The GFS has us clearing out while the NAM continues to have showers and thunderstorms develop during the day and afternoon. The GFS MOS has a 23% chance of rain during the day, the NAM MOS has a 70% chance. It's not certain if we'll see sun this afternoon or not. More likely, we'll see some bright skies breaks of sun and but with it, the development of instability and more thunderstorms. Sun 8/9: Mostly cloudy with continued chance of showers and thunderstorms. There likely will be a few bright spots and possibly sunny breaks during the afternoon, but any sunshine will increase instability and result in more thunderstorms. Humid. High 85. Read my most recent climate discussion here. Follow me on Twitter as theweatherguy for quick updates and weather observations. posted: Aug 09 2009 at 9:23 am [/weather/aug09] 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.