theweatherguy's website
Philadelphia Weekend Weather and Storm Forecasts
About this blog
theweatherguy's website,
"Thoughts and comments on Philadelphia Weather and Daily Life."
aka "theweatherguy"
Copy link for RSS feed
These are a few of my favorite links. Meteorology Glossary
Weather Archives:
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
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
Commentary:
Miscellaneous
Sat, 29 Oct 2011
Winter Weather Update- Sat 1 PM
The latest High Resolution Rapid Refresh Model predicts considerable snow accumulation just outside the city limits, north and west. Temps are running considerably lower than had been forecast.
The HRRR now predicts an inch or two inside the city, but, with an increase in distance north and west, as much as 6-8 inches in northern Montco and Bucks and western Chester counties.
posted: Oct 29 2011 at 9:09 pm
[/weather/oct11] permanent link
Winter Weather Update- Sat 11 AM
OK, will this storm make the weather models and meteorologists look bad? Possibly. The usual parameters don't support snow at this time. But, I look out my window and there's plenty of snow falling, despite temps being several degrees above freezing and 500-1000mb thickness levels being above 540dm.
My previous post was based on the NAM and last night's GFS.
The latest high resolution Rapid Refresh Model now shows wets snow with accumulations slight and increasing with distance north and west of the city. Nothing in NJ.
It's still unclear how much snow will accumulate. Ground surfaces are wet and above freezing. Wet slush or coating expected in the evening. Accumulation, if it occurs in PHL and its immediate suburbs, will occur mostly on grassy surfaces and trees. A coating to an inch possible on sidewalks. Or maybe we just don't know with this storm??? :-)
posted: Oct 29 2011 at 10:56 am
[/weather/oct11] permanent link
Winter Weather Update- Sat 10 AM
Low pressure is developing along the DE VA coastlines as expected. Some mix of snow flakes is occurring due to dynamic cooling (rapid pressure decrease).
Atmospheric thickness levels are not expected to get into the snow support range until after 5 PM. Dynamic cooling may mix in snow flakes before that time. No accumulation during the daytime hours is expected in the immediate PHL area.
The high resolution Rapid Refresh Model has a mix of rain and wet snow for the morning in PHL with more wet snow mixed in to the west and north.
The new NAM model run is just becoming available. It depicts cold air moving in about 4-5 PM in Philadelphia, sooner to the west. But the influx of cold air will likely cause the precip to stop earlier than previously thought.
It's still unclear how much snow will accumulate. Ground surfaces are wet and above freezing. Wet slush or coating expected in the evening. Accumulation, if it occurs in PHL and its immediate suburbs, will occur mostly on grassy surfaces and trees. A coating to an inch possible on sidewalks.
posted: Oct 29 2011 at 10:30 am
[/weather/oct11] 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.