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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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Thu, 15 Mar 2007
March Storm Update- Thurs PM
An interesting consequence of an earlier start for Daylight Savings time....waiting for the new data is now one hour later. So the latest NAM data is just becoming available at 10 instead of 9 and the GFS data won't be available until even later.
Anyhow, the latest NAM has temperatures at 5000 feet being below freezing (read sleet) but temperatures at higher levels don't supports snow. March can be a bit different with snow parameters, but I don't expect much of any roadway accumulation in the immediate Philadephia area during the day, although precipitation rates will be heavy (over 2 inches water), especially afternoon and early evening Friday.
A very rainy day, mixed with sleet and wet snow for much of the day. More wet than white. Little accumulation on roadways during the daytime hours. Things might get a little tricky and icy early Friday evening. Expect a slushing coating to an inch or so when things wrap up around midnight Friday. Icy conditions possible early Saturday morning.
Sat 3/17: Some light snow flurries lingering early morning, then clouds breaks for partly sunny skies. WINDY and cold. Some snow flurries possible. High 38
Sun 3/18: Sunny windy and colder than normal High 43.

posted: Mar 15 2007 at 9:13 pm

[/weather/mar07] permanent link

More sleet than snow for Friday afternoon- Thurs AM Update
Big change for Friday
A low pressure system will move through with a cold front on Friday. Cold air will move in during the day on Friday and precipitation will change during the afternoon from rain to sleet, however the latest models have the upper atmosphere too warm for a full changeover to snow. Nonetheless, difficult weather for early Friday evening, as heavy precipitation will be a mix of rain, sleet and wet snow. Perhaps an inch of accumulation of sleet and wet snow.
This will be an interesting weather event. I've found that the parameters for snow in March are slightly different than those during the true winter months and if that proves to be true tomorrow, the the forecasted sleet later in the day Friday will be a heavy, large flaked wet snow. We'll see.
Sat 3/17: Some light snow flurries lingering early morning, then clouds breaks for partly sunny skies. WINDY and cold. High 38
Sun 3/18: Sunny windy and colder than normal High 43.

posted: Mar 15 2007 at 6:08 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	Thu, 15 Mar 2007 March Storm Update- Thurs PM An interesting consequence of an earlier start for Daylight Savings time....waiting for the new data is now one hour later. So the latest NAM data is just becoming available at 10 instead of 9 and the GFS data won't be available until even later. Anyhow, the latest NAM has temperatures at 5000 feet being below freezing (read sleet) but temperatures at higher levels don't supports snow. March can be a bit different with snow parameters, but I don't expect much of any roadway accumulation in the immediate Philadephia area during the day, although precipitation rates will be heavy (over 2 inches water), especially afternoon and early evening Friday. A very rainy day, mixed with sleet and wet snow for much of the day. More wet than white. Little accumulation on roadways during the daytime hours. Things might get a little tricky and icy early Friday evening. Expect a slushing coating to an inch or so when things wrap up around midnight Friday. Icy conditions possible early Saturday morning. Sat 3/17: Some light snow flurries lingering early morning, then clouds breaks for partly sunny skies. WINDY and cold. Some snow flurries possible. High 38 Sun 3/18: Sunny windy and colder than normal High 43. posted: Mar 15 2007 at 9:13 pm [/weather/mar07] permanent link More sleet than snow for Friday afternoon- Thurs AM Update Big change for Friday A low pressure system will move through with a cold front on Friday. Cold air will move in during the day on Friday and precipitation will change during the afternoon from rain to sleet, however the latest models have the upper atmosphere too warm for a full changeover to snow. Nonetheless, difficult weather for early Friday evening, as heavy precipitation will be a mix of rain, sleet and wet snow. Perhaps an inch of accumulation of sleet and wet snow. This will be an interesting weather event. I've found that the parameters for snow in March are slightly different than those during the true winter months and if that proves to be true tomorrow, the the forecasted sleet later in the day Friday will be a heavy, large flaked wet snow. We'll see. Sat 3/17: Some light snow flurries lingering early morning, then clouds breaks for partly sunny skies. WINDY and cold. High 38 Sun 3/18: Sunny windy and colder than normal High 43. posted: Mar 15 2007 at 6:08 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.