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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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Sat, 15 Dec 2007
Storm Update - Sat Afternoon
The NAM continues to advertise well over an inch of water falling after midnight and before daybreak Sunday. This heavy rain will cause some small stream and urban flooding late tonight and before daybreak.
The temperature has been a bit colder than predicted by the models, and I think from areas north and west of Philadelphia, there will be a fair amount of sleet and freezing rain before the turn-over to all rain after midnight. Temperatures will slowly rise during the night, but perhaps not until 3 AM, then they move towards the 40s, if the models are correct.
With all the models showing similar things, there isn't much likelihood of much surprises. The only [unlikely] possibility is that coastal development occurs further south than predicted by the models, giving us a colder storm. Only one ensemble model member suggests this.
Sun 12/16: Rain, heavy very early, in the morning, tapering during the morning to mostly cloudy conditions with light scattered showers in the afternoon. Some snow showers possible after 5 PM. High near 48, plummeting to 30 by early evening. High winds, especially early morning and especially later afternoon. Very windy and cold Sunday night.

posted: Dec 15 2007 at 5:02 pm

[/weather/dec07] permanent link

Storm Update - Sat AM
The latest NAM and GFS model raw data has become available. Very similar with temperature profiles, with surface temperatures warming above freezing by midnight tonight in Philadelphia, somewhat later north and west. The NAM has forecasted extremely heavy rain late tonight, before daybreak Sunday. Windy conditions. Rain will taper off after noon on Sunday, with just light showers at times.

Sat 12/15: Some sun early, then becoming increasingly cloudy. Light precip, mostly sleet (with some snow flakes) starts about 7-10 PM, then changes quickly to a mix of sleet and rain, then rain. Rain becomes very heavy towards morning. Urban flooding possible some areas late tonight. High 38.
Sun 12/16: Rain, heavy very early, in the morning, tapering during the morning to light showers in the afternoon. Continued cloudy some snow showers after 5 PM. High near 48, plummeting to 30 by early evening. High winds, especially early morning and again later afternoon. Very windy and cold Sunday night.

posted: Dec 15 2007 at 11:04 am

[/weather/dec07] 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	Sat, 15 Dec 2007 Storm Update - Sat Afternoon The NAM continues to advertise well over an inch of water falling after midnight and before daybreak Sunday. This heavy rain will cause some small stream and urban flooding late tonight and before daybreak. The temperature has been a bit colder than predicted by the models, and I think from areas north and west of Philadelphia, there will be a fair amount of sleet and freezing rain before the turn-over to all rain after midnight. Temperatures will slowly rise during the night, but perhaps not until 3 AM, then they move towards the 40s, if the models are correct. With all the models showing similar things, there isn't much likelihood of much surprises. The only [unlikely] possibility is that coastal development occurs further south than predicted by the models, giving us a colder storm. Only one ensemble model member suggests this. Sun 12/16: Rain, heavy very early, in the morning, tapering during the morning to mostly cloudy conditions with light scattered showers in the afternoon. Some snow showers possible after 5 PM. High near 48, plummeting to 30 by early evening. High winds, especially early morning and especially later afternoon. Very windy and cold Sunday night. posted: Dec 15 2007 at 5:02 pm [/weather/dec07] permanent link Storm Update - Sat AM The latest NAM and GFS model raw data has become available. Very similar with temperature profiles, with surface temperatures warming above freezing by midnight tonight in Philadelphia, somewhat later north and west. The NAM has forecasted extremely heavy rain late tonight, before daybreak Sunday. Windy conditions. Rain will taper off after noon on Sunday, with just light showers at times. Sat 12/15: Some sun early, then becoming increasingly cloudy. Light precip, mostly sleet (with some snow flakes) starts about 7-10 PM, then changes quickly to a mix of sleet and rain, then rain. Rain becomes very heavy towards morning. Urban flooding possible some areas late tonight. High 38. Sun 12/16: Rain, heavy very early, in the morning, tapering during the morning to light showers in the afternoon. Continued cloudy some snow showers after 5 PM. High near 48, plummeting to 30 by early evening. High winds, especially early morning and again later afternoon. Very windy and cold Sunday night. posted: Dec 15 2007 at 11:04 am [/weather/dec07] 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.