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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
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Wed, 07 Jul 2010
Philadelphia Weekend Weather Outlook -Wed PM
The Bermuda high that gave us the record temps will move east and a cold front will move through Saturday afternoon bringing more tolerable temperatures and a chance of thunderstorms Saturday afternoon. As has been the recent trend, the thunderstorms that develop may weaken as they move eastward over Philadelphia and NJ. They are unlikely to significantly lessen the local dry conditions.
Sat 7/10: Partly cloudy/sunny, warm, very humid. Chance of thunderstorms in the afternoon. High 85.
Sun 7/11: Mostly sunny warm, less humid. High 89.

Solar Discussion July: Solar Cycle 24 is underway, although the increase in sunspot activity has fallen below predicted values at this stage of the cycle. Solar flux remains low, as does sunspot number. What has changed is the velocity of the solar wind. The solar wind was very quiet last summer, with speeds around 300 Km/sec. This year, solar wind values are much higher, in the 400-700 km/sec range. While solar wind is associated with coronal holes, not only flares and sunspots, this appears to be measurably increased this year. Are increases in solar wind associated with less cloud cover, less rain, droughts and heat waves? It's not clear, although there are theories making this association, specifically that the higher solar wind reduces high energy cosmic ray seeding of clouds. When was the last heat wave on July 4th? 11 years ago. What's the average solar cycle length? 11 years. Not scientific, but these drought and heat cycles seem to go in cycles of this length.
Back in April I took a temperature-neutral approach to this summer's climate. I'm still there. What I do think we might begin to see is a continuing decrease in precipitation, both with the end of the El Nino and the increase in solar activity. Perhaps we're seeing the beginning of a drought pattern? Stay tuned.

posted: Jul 07 2010 at 5:31 pm

[/weather/jul10] 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	Wed, 07 Jul 2010 Philadelphia Weekend Weather Outlook -Wed PM The Bermuda high that gave us the record temps will move east and a cold front will move through Saturday afternoon bringing more tolerable temperatures and a chance of thunderstorms Saturday afternoon. As has been the recent trend, the thunderstorms that develop may weaken as they move eastward over Philadelphia and NJ. They are unlikely to significantly lessen the local dry conditions. Sat 7/10: Partly cloudy/sunny, warm, very humid. Chance of thunderstorms in the afternoon. High 85. Sun 7/11: Mostly sunny warm, less humid. High 89. Solar Discussion July: Solar Cycle 24 is underway, although the increase in sunspot activity has fallen below predicted values at this stage of the cycle. Solar flux remains low, as does sunspot number. What has changed is the velocity of the solar wind. The solar wind was very quiet last summer, with speeds around 300 Km/sec. This year, solar wind values are much higher, in the 400-700 km/sec range. While solar wind is associated with coronal holes, not only flares and sunspots, this appears to be measurably increased this year. Are increases in solar wind associated with less cloud cover, less rain, droughts and heat waves? It's not clear, although there are theories making this association, specifically that the higher solar wind reduces high energy cosmic ray seeding of clouds. When was the last heat wave on July 4th? 11 years ago. What's the average solar cycle length? 11 years. Not scientific, but these drought and heat cycles seem to go in cycles of this length. Back in April I took a temperature-neutral approach to this summer's climate. I'm still there. What I do think we might begin to see is a continuing decrease in precipitation, both with the end of the El Nino and the increase in solar activity. Perhaps we're seeing the beginning of a drought pattern? Stay tuned. posted: Jul 07 2010 at 5:31 pm [/weather/jul10] 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.