theweatherguy's website

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, 28 May 2012
Philly Weekend Weather Update -Mon AM
High pressure will keep a southwesterly flow of very warm, humid air over us today. Summer-like conditions for the unofficial start of the summer season!
Yesterday, the NAM-NMM was correct in keeping the thunderstorms to our west. Last night, thunderstorms made it into upper Montgomery and far western Chester county, but dissipated by the time they reached Philadelphia.
Last night's high resolution NAM model predicts considerable thunderstorm activity in our area today, during the late afternoon and evening hours. This morning's NAM FOUS data shows an lifted index of -8, which indicates unusually high instability and can support heavy thunderstorm development. (We get heavy thunderstorms around here with lifted indexes of -4 to -6; the more negative, the greater the instability of the atmosphere. A lifted index as unstable as -8 isn't very common around here.) While the instability is very high, the vertical movement of the atmosphere doesn't become favorable until this evening.
Mon 5/28: Mostly sunny, very warm, humid. A good chance of moderate to severe thunderstorms late in the afternoon and evening. High 89.

posted: May 28 2012 at 12:02 pm

[/weather/may12] permanent link
Sun, 27 May 2012
Philly Weekend Weather Update -Sun AM
The thunderstorms early this morning were poorly captured by the regular models yesterday. Looking over the high resolution WRF-NAM model versions from last night, it appears that the stalled frontal boundary that had been in northern PA has settled a bit further south, closer to us. Daytime heating, and moisture convergence along the boundary will result in more thunderstorms possible during the day today. Depending on which model one looks at, the NMM-NAM (Non Hydrostatic Mesoscale Model) initialized with the NAM/WRF physics has thunderstorms more in western PA, while the NMM-ARW (initialized with the GFS physics) has thunderstorms in our area during the day.
Sun 5/27: A mix of clouds and sun, very warm and somewhat humid. High 86. Showers and thunderstorms possible anytime during the day, especially during the afternoon.
Mon 5/28: Partly to mostly sunny, very warm humid. Slight chance of an afternoon thunderstorm. High 88.

posted: May 27 2012 at 8:38 am

[/weather/may12] permanent link
Fri, 25 May 2012
Philly Weekend Weather Outlook -Fri AM
The latest models have a much drier forecast, with only a slight chance of showers each day. With the drier, forecast, there may be somewhat more clouds than originally thought.
High pressure centered over the middle of the country will bring a southwesterly flow of warm to hot weather for Memorial Day Weekend. Complicating the picture will be an upper air flow that will contain disturbances likely to trigger afternoon showers and thunderstorms. The most distinct of these disturbances will move through on Sunday. The latest GFS model shows less shower activity than had previously been forecast.
Sat 5/26: A mix of clouds and sun, very warm and somewhat humid. Slight chance of a scattered afternoon thunderstorm. High 88.
Sun 5/27: A mix of clouds and sun, very warm and somewhat humid. High 88. Slight chance of an afternoon thunderstorm.
Mon 5/28: Partly to mostly sunny, warm humid. Slight chance of an afternoon thunderstorm. High 85

posted: May 25 2012 at 11:48 am

[/weather/may12] permanent link

Philly Weekend Weather Outlook -Fri AM
High pressure centered over the middle of the country will bring a southwesterly flow of warm to hot weather for Memorial Day Weekend. Complicating the picture will be an upper air flow that will contain disturbances likely to trigger afternoon showers and thunderstorms. The most distinct of these disturbances will move through on Sunday. The latest GFS model shows less shower activity than had previously been forecast.
Sat 5/26: Mostly sunny, very warm and somewhat humid. Slight chance of a scattered afternoon thunderstorm. High 89.
Sun 5/27: Sunny the morning, becoming partly cloudy. Showers and thunderstorms possible Warm and humid. High 85.
Mon 5/28: Partly to mostly sunny, warm humid. Slight chance of an afternoon thunderstorm. High 88

posted: May 25 2012 at 8:46 am

[/weather/may12] permanent link
Wed, 23 May 2012
Philly Weekend Weather Outlook -Wed PM
High pressure centered over the middle of the country will bring a southwesterly flow of warm to hot weather for Memorial Day Weekend. Complicating the picture will be an upper air flow that will contain disturbances likely to trigger afternoon showers and thunderstorms. The most distinct of these disturbances will move through on Sunday.
Sat 5/26: Mostly sunny, very warm and somewhat humid. Slight chance of a scattered afternoon thunderstorm. High 88.
Sun 5/27: Sunny the morning, becoming partly cloudy. Showers and thunderstorms likely. Warm and humid. High 85.
Mon 5/28: Mostly sunny, warm humid. Slight chance of an afternoon thunderstorm. High 88

posted: May 23 2012 at 9:43 pm

[/weather/may12] permanent link
Fri, 18 May 2012
Philly Weekend Weather Forecast -Fri PM
High pressure will retreat to the northeast and an easterly wind flow will develop over the weekend. Weak low pressure along the coastline will move north and bring the chance of showers by Sunday evening.
Sat 5/19: Sunny and very nice. High 80
Sun 5/20: Sunny, then increasingly cloudiness, becoming mostly cloudy by late afternoon. Chance of a light shower very late afternoon. High 79.

posted: May 18 2012 at 9:50 pm

[/weather/may12] permanent link
Thu, 10 May 2012
Philly Weekend Weather Forecast -Thu PM
The upper trough with cool weather will relax over the weekend, as surface high pressure moves off to the east. The northwesterly flow of cool dry air will be replaced by a surface warmer southwesterly flow aloft. This may bring some clouds in for Sunday, but no precipitation is expected.
Sat 5/12: Sunny, dry and warm. High 80.
Sun 5/13: Sunny to start, with some mid-level clouds in the afternoon. High 81.

posted: May 10 2012 at 9:28 pm

[/weather/may12] 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, 28 May 2012 Philly Weekend Weather Update -Mon AM High pressure will keep a southwesterly flow of very warm, humid air over us today. Summer-like conditions for the unofficial start of the summer season! Yesterday, the NAM-NMM was correct in keeping the thunderstorms to our west. Last night, thunderstorms made it into upper Montgomery and far western Chester county, but dissipated by the time they reached Philadelphia. Last night's high resolution NAM model predicts considerable thunderstorm activity in our area today, during the late afternoon and evening hours. This morning's NAM FOUS data shows an lifted index of -8, which indicates unusually high instability and can support heavy thunderstorm development. (We get heavy thunderstorms around here with lifted indexes of -4 to -6; the more negative, the greater the instability of the atmosphere. A lifted index as unstable as -8 isn't very common around here.) While the instability is very high, the vertical movement of the atmosphere doesn't become favorable until this evening. Mon 5/28: Mostly sunny, very warm, humid. A good chance of moderate to severe thunderstorms late in the afternoon and evening. High 89. posted: May 28 2012 at 12:02 pm [/weather/may12] permanent link Sun, 27 May 2012 Philly Weekend Weather Update -Sun AM The thunderstorms early this morning were poorly captured by the regular models yesterday. Looking over the high resolution WRF-NAM model versions from last night, it appears that the stalled frontal boundary that had been in northern PA has settled a bit further south, closer to us. Daytime heating, and moisture convergence along the boundary will result in more thunderstorms possible during the day today. Depending on which model one looks at, the NMM-NAM (Non Hydrostatic Mesoscale Model) initialized with the NAM/WRF physics has thunderstorms more in western PA, while the NMM-ARW (initialized with the GFS physics) has thunderstorms in our area during the day. Sun 5/27: A mix of clouds and sun, very warm and somewhat humid. High 86. Showers and thunderstorms possible anytime during the day, especially during the afternoon. Mon 5/28: Partly to mostly sunny, very warm humid. Slight chance of an afternoon thunderstorm. High 88. posted: May 27 2012 at 8:38 am [/weather/may12] permanent link Fri, 25 May 2012 Philly Weekend Weather Outlook -Fri AM The latest models have a much drier forecast, with only a slight chance of showers each day. With the drier, forecast, there may be somewhat more clouds than originally thought. High pressure centered over the middle of the country will bring a southwesterly flow of warm to hot weather for Memorial Day Weekend. Complicating the picture will be an upper air flow that will contain disturbances likely to trigger afternoon showers and thunderstorms. The most distinct of these disturbances will move through on Sunday. The latest GFS model shows less shower activity than had previously been forecast. Sat 5/26: A mix of clouds and sun, very warm and somewhat humid. Slight chance of a scattered afternoon thunderstorm. High 88. Sun 5/27: A mix of clouds and sun, very warm and somewhat humid. High 88. Slight chance of an afternoon thunderstorm. Mon 5/28: Partly to mostly sunny, warm humid. Slight chance of an afternoon thunderstorm. High 85 posted: May 25 2012 at 11:48 am [/weather/may12] permanent link Philly Weekend Weather Outlook -Fri AM High pressure centered over the middle of the country will bring a southwesterly flow of warm to hot weather for Memorial Day Weekend. Complicating the picture will be an upper air flow that will contain disturbances likely to trigger afternoon showers and thunderstorms. The most distinct of these disturbances will move through on Sunday. The latest GFS model shows less shower activity than had previously been forecast. Sat 5/26: Mostly sunny, very warm and somewhat humid. Slight chance of a scattered afternoon thunderstorm. High 89. Sun 5/27: Sunny the morning, becoming partly cloudy. Showers and thunderstorms possible Warm and humid. High 85. Mon 5/28: Partly to mostly sunny, warm humid. Slight chance of an afternoon thunderstorm. High 88 posted: May 25 2012 at 8:46 am [/weather/may12] permanent link Wed, 23 May 2012 Philly Weekend Weather Outlook -Wed PM High pressure centered over the middle of the country will bring a southwesterly flow of warm to hot weather for Memorial Day Weekend. Complicating the picture will be an upper air flow that will contain disturbances likely to trigger afternoon showers and thunderstorms. The most distinct of these disturbances will move through on Sunday. Sat 5/26: Mostly sunny, very warm and somewhat humid. Slight chance of a scattered afternoon thunderstorm. High 88. Sun 5/27: Sunny the morning, becoming partly cloudy. Showers and thunderstorms likely. Warm and humid. High 85. Mon 5/28: Mostly sunny, warm humid. Slight chance of an afternoon thunderstorm. High 88 posted: May 23 2012 at 9:43 pm [/weather/may12] permanent link Fri, 18 May 2012 Philly Weekend Weather Forecast -Fri PM High pressure will retreat to the northeast and an easterly wind flow will develop over the weekend. Weak low pressure along the coastline will move north and bring the chance of showers by Sunday evening. Sat 5/19: Sunny and very nice. High 80 Sun 5/20: Sunny, then increasingly cloudiness, becoming mostly cloudy by late afternoon. Chance of a light shower very late afternoon. High 79. posted: May 18 2012 at 9:50 pm [/weather/may12] permanent link Thu, 10 May 2012 Philly Weekend Weather Forecast -Thu PM The upper trough with cool weather will relax over the weekend, as surface high pressure moves off to the east. The northwesterly flow of cool dry air will be replaced by a surface warmer southwesterly flow aloft. This may bring some clouds in for Sunday, but no precipitation is expected. Sat 5/12: Sunny, dry and warm. High 80. Sun 5/13: Sunny to start, with some mid-level clouds in the afternoon. High 81. posted: May 10 2012 at 9:28 pm [/weather/may12] 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.