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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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Mon, 07 Dec 2009
Philadelphia Week Weather Outlook- Snow Again?
An interesting week weatherwise, as low pressure undergoes deep cyclogenesis as it tracks west of us towards the Great Lakes on Wednesday. As the storm deepens and wraps up, heavy rains on Wednesday will be replaced with high winds and cold temperatures brought in on the flow around the low.
Thursday will be a transitional day, with Friday and much of Saturday in cold high pressure. There will be no doubt we are in December. Most interesting, the long range GFS and DGEX show another approaching low late Saturday into Sunday morning. The DGEX is currently predicting snow (2-4 inches) for early Sunday morning Way too early to take this too literally, but I will keep an eye on it.
One thing interesting from the snow of this past weekend- the NAM showed itself to be a serious contender for winter prediction. The NAM-WRF was updated this past April and again over the summer. It appears that significant improvements may have made with this model.
Since the summer, I've postulated that this upcoming winter would be unusually cold. The sun remains at a prolonged minimum in activity. Total solar irradiance is about 1 watt/m2 lower than it was during the peak of the last solar cycle in April 2000. Read my most recent Fall-Winter Climate prediction here.

posted: Dec 07 2009 at 8:01 pm

[/weather/dec09] 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	Mon, 07 Dec 2009 Philadelphia Week Weather Outlook- Snow Again? An interesting week weatherwise, as low pressure undergoes deep cyclogenesis as it tracks west of us towards the Great Lakes on Wednesday. As the storm deepens and wraps up, heavy rains on Wednesday will be replaced with high winds and cold temperatures brought in on the flow around the low. Thursday will be a transitional day, with Friday and much of Saturday in cold high pressure. There will be no doubt we are in December. Most interesting, the long range GFS and DGEX show another approaching low late Saturday into Sunday morning. The DGEX is currently predicting snow (2-4 inches) for early Sunday morning Way too early to take this too literally, but I will keep an eye on it. One thing interesting from the snow of this past weekend- the NAM showed itself to be a serious contender for winter prediction. The NAM-WRF was updated this past April and again over the summer. It appears that significant improvements may have made with this model. Since the summer, I've postulated that this upcoming winter would be unusually cold. The sun remains at a prolonged minimum in activity. Total solar irradiance is about 1 watt/m2 lower than it was during the peak of the last solar cycle in April 2000. Read my most recent Fall-Winter Climate prediction here. posted: Dec 07 2009 at 8:01 pm [/weather/dec09] 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.