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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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Tue, 06 Mar 2007
Snow for Wed - Tues PM Update
The latest NAM just became available.
It shows 0.16 inches water total, starting about 7-8 AM and tapering after 1 PM. Total snow accumulation 1-3 inches on grassy surfaces, with the lower end of the spectrum most likely.
Solar insolation on dark roadways will reduce the impact on travel.
A warm up is expected for the weekend, but likely with clouds and there's a chance of showers, especially on Sunday.

posted: Mar 06 2007 at 9:24 pm

[/weather/mar07] permanent link

Snow for Wed - Tues AM Update
The trends for the Alberta clipper expected for Wednesday:
Both models have decreased the amounts of snow. QPF values (Quantity of Precip Falling) range from 0.25 water (NAM) to 0.19 (GFS). Because temps will be very low, snow - water ratio will be high, perhaps as high as 20:1. (That's where the 2-4 inches predicted by Accuweather if coming from.) With the current trends, I'm going with 1-3 inches, mostly on grassy surfaces. There will be melting on many roadways during the day due to solar insolation.
There are some timing differences between the GFS and NAM. The GFS has snow starting in the morning, while the NAM has more snow in the afternoon. Either way, the models tend to overpredict Alberta Clippers, so I don't think this will be any more than 1-3 inches.
A warm up is expected for the weekend, but likely with clouds and there's a chance of showers, especially on Sunday.

posted: Mar 06 2007 at 7:36 am

[/weather/mar07] 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	Tue, 06 Mar 2007 Snow for Wed - Tues PM Update The latest NAM just became available. It shows 0.16 inches water total, starting about 7-8 AM and tapering after 1 PM. Total snow accumulation 1-3 inches on grassy surfaces, with the lower end of the spectrum most likely. Solar insolation on dark roadways will reduce the impact on travel. A warm up is expected for the weekend, but likely with clouds and there's a chance of showers, especially on Sunday. posted: Mar 06 2007 at 9:24 pm [/weather/mar07] permanent link Snow for Wed - Tues AM Update The trends for the Alberta clipper expected for Wednesday: Both models have decreased the amounts of snow. QPF values (Quantity of Precip Falling) range from 0.25 water (NAM) to 0.19 (GFS). Because temps will be very low, snow - water ratio will be high, perhaps as high as 20:1. (That's where the 2-4 inches predicted by Accuweather if coming from.) With the current trends, I'm going with 1-3 inches, mostly on grassy surfaces. There will be melting on many roadways during the day due to solar insolation. There are some timing differences between the GFS and NAM. The GFS has snow starting in the morning, while the NAM has more snow in the afternoon. Either way, the models tend to overpredict Alberta Clippers, so I don't think this will be any more than 1-3 inches. A warm up is expected for the weekend, but likely with clouds and there's a chance of showers, especially on Sunday. posted: Mar 06 2007 at 7:36 am [/weather/mar07] 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.