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Philadelphia Weekend Weather and Storm Forecasts
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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
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Thu, 10 May 2012Philly 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
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Thu, 26 Apr 2012Philly Weekend Weather Forecast -Thu PM
A front moves through and stalls south of our area over the weekend. There are significant differences between the NAM and GFS models, with GFS maintaining clouds over us for Saturday, while the NAM suppresses the moisture to our south. Both show a disturbance moving through Saturday night, with showers. Some cloudiness lingers into Sunday.
Sat 4/28: Sunny in the morning, increasing clouds in the afternoon. Showers at night. High 60.
Sun 4/29: Considerable cloudiness, some sun in the afternoon. High 64.
posted: Apr 26 2012 at 7:52 pm
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Fri, 20 Apr 2012Philly Weekend Weather Forecast -Fri PM
A fascinating weather map for the next several days as a nor'easter develops following the passage of a cold front on Saturday. An upper air disturbance phases with a low pressure system moving up the coastline from Florida and results in intense cyclogenesis over our area for Sunday through Tuesday. High winds, and heavy rains and thunderstorms possible.
Sat 4/21: Becoming cloudy with showers in the afternoon. High 72.
Sun 4/22: Cloudy, windy, chilly with heavy rain and thunderstorms possible. High 56
posted: Apr 20 2012 at 10:27 pm
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Sat, 14 Apr 2012Philly Weekend Weather Forecast -Sat AM
The colder cyclonic flow that has been with us for the past several days relaxes, as a return flow over the weekend brings warmer temperatures back. A warm front will approach on Saturday and move through late Saturday night or early Sunday. Most of the showers associated with this front are expected to shear off to our north, but there's a chance of a light shower very early. Clouds gradually break for some sun during the afternoon. Much milder temps for Sunday.
Sat 4/14: Sunny with high clouds early, then increasing clouds later. High 72.
Sun 4/15: Cloudy with a chance of a shower around daybreak, then gradually becoming partly sunny. Mild, high 76.
posted: Apr 14 2012 at 8:04 am
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Wed, 11 Apr 2012Philly Weekend Weather Forecast -Wed PM
The colder cyclonic flow that has been with us for the past several days relaxes, as a return flow over the weekend brings warmer temperatures back. A warm front will move through late Saturday night or early Sunday. Most of the showers associated with this front are expected to shear off to our north. Much milder temps for Sunday.
Sat 4/14: Sunny, some high level clouds later in the afternoon. High 69.
Sun 4/15: Some cloudiness early with a chance of a shower, then partly sunny. Mild, high 76.
posted: Apr 11 2012 at 8:45 pm
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Sat, 07 Apr 2012Philly Weekend Weather Forecast -Fri PM
Continued beautiful, fair skies, but windy mid day.
Sun 4/8: Sunny and still windy. High 67.
posted: Apr 07 2012 at 9:28 pm
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Fri, 06 Apr 2012Philly Weekend Weather Forecast -Fri PM
Beautiful weather for this weekend. Chilly tonight, otherwise superb!
Sat 4/7: Sunny but windy. High 64.
Sun 4/8: Sunny and milder. High 69.
posted: Apr 06 2012 at 5:04 pm
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Thu, 05 Apr 2012Philly Weekend Weather Forecast -Thu PM
The overall pattern favors rather dry weather for the upcoming week. An amplified jet stream will relax on Saturday, allowing mild weather to return to our area. Another front moves through on Tuesday allowing cooler temperatures to return.
Sat 4/7: Sunny but windy. High 65.
Sun 4/8: Sunny and milder. High 66.
posted: Apr 05 2012 at 8:51 pm
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Fri, 30 Mar 2012Philly Weekend Weather Forecast -Fri PM
Spring is known for high variability of weather, and the current weather map supports this changeability. Low pressure will move toward us late Friday through Friday night and will be off the coast sometime Saturday. Showers early Saturday morning are likely to linger into early Saturday afternoon. Cloudiness should also be with us for much of the day on Saturday. Some sunshine returns Sunday morning before clouds return with another approaching low
Sat 3/31: Cloudy with rain in the morning ending sometime in the early afternoon. Hi 50.
Sun 4/1: Some sun early, then increasingly cloudy. High 66.
posted: Mar 30 2012 at 9:01 pm
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Thu, 29 Mar 2012Philly Weekend Weather Outlook -Thu PM
Spring is known for high variability of weather, and the current weather map supports this changeability. Low pressure will move toward us late Friday through Friday night and will be off the coast sometime Saturday. Showers early Saturday morning are likely to linger into early Saturday afternoon. Cloudiness should also be with us for much of the day on Saturday. Fair weather returns on Sunday.
Sat 3/31: Cloudy with rain in the morning ending sometime in the early afternoon. Hi 50.
Sun 4/1: Mostly sunny and milder. High 66.
posted: Mar 29 2012 at 9:37 pm
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Sat, 24 Mar 2012Philadelphia Weekend Weather Update - Sat AM
The models had trouble capturing the precipitation with the approaching upper closed low pressure system. (Quite common problem with the computer models; probably should have underscored that uncertainty in yesterday's forecast.)
The latest NAM now shows the showers moving through Philadelphia, with another band of precipitation on its heals. So on and off showers are likely for tomorrow.
Interestingly, the NAM backs off on the showers for Sunday! We'll see how accurate that is!
Sat 3/24: Rest of the day: Mostly cloudy with scattered showers. High 62
Sun 3/25: Considerable cloudiness, showers ending in the early morning. High 68.
posted: Mar 24 2012 at 11:17 am
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Fri, 23 Mar 2012Philadelphia Weekend Weather Forecast-Fri PM
An upper closed low system will approach and be over our area over the weekend. Somewhat cooler temperatures (but still above normal) and the chance of showers persists through the weekend, although the rain showers will be widely scattered. Best chances of rain in any specific area is late afternoon on both Saturday and Sunday.
Sat 3/24 A mix of sun and clouds. Chance of widely scattered showers, especially late afternoon. High 67.
Sun 3/25: Considerable cloudiness. Chance of widely scattered showers, especially late in the afternoon. High 69.
posted: Mar 23 2012 at 12:30 pm
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Tue, 20 Mar 2012Philly Weekend Weather Outlook -Tue PM
The weather for the upcoming weekend looks cooler and wetter, with slow moving low pressure winding up as a coastal low. Details later in the week
Sat 3/24: Cloudy with showers. High 68.
Sun 3/25: Cloudy with a continued chance of rain. High 66.
posted: Mar 20 2012 at 10:57 pm
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Fri, 16 Mar 2012Philly Weekend Weather Forecast - Fri PM
High pressure will build in for both Saturday and Sunday. The return southwesterly flow of warmer moister air on Sunday may bring some cloudiness and a chance of widely scattered showers, although most areas will be dry.
Sat 3/17: Mostly sunny and mild. High 69.
Sun 3/18: Sunny early, then partly sunny, some clouds in the afternoon. Maybe a widely scattered shower late. High 68.
posted: Mar 16 2012 at 8:12 pm
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Mon, 12 Mar 2012Philadelphia Spring-Summer Climate Forecast- March 2012
While climate forecasting is not my forte (for that matter, I don't think it's anyone's forte) I do like to share with my readers what I'm thinking about regarding the upcoming 2012 spring summer season.
My regular readers know that two years ago, I put great stock in the solar cycle (and a lesser extent the sea surface temperature cycles) to predict climate trends. My winter forecast issued in November, based on the solar cycle, verified.
The current solar cycle maximum is less than two years away. While this solar maximum will be significantly lower than the previous two cycles, and while we are coming off of a significantly lengthy solar minimum, it's my opinion that this coming spring and summer will approach the very dry and hot summers we had in 2000-2001. Expect much above average normal temps and little rainfall.
In fact, by next Fall, I think we will be hearing the word "drought" in the news.
Stay tuned!
posted: Mar 12 2012 at 9:34 pm
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Fri, 09 Mar 2012Philly Weekend Weather Forecast - Fri PM
High pressure and amplified flow aloft will bring fair skies and cooler temps on Saturday. As the upper flow relaxes, warmer temps return for Sunday.
Sat 3/10: Sunny and cold. High 45
Sun 3/11: Sunny and much milder. High 60 .
posted: Mar 09 2012 at 4:57 pm
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Sat, 03 Mar 2012Philadelphia Weekend Weather Forecast-Sat PM
Another cold front will move through the area late in the day on Sunday. Preceding the front will be some cloudiness and maybe some light flurries south of Philadelphia.
Sun 3/4: Considerable cloudiness, still somewhat windy and cooler. Chance of a sprinkle or snow flurry late. High 47.
posted: Mar 03 2012 at 11:02 pm
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Fri, 02 Mar 2012Philadelphia Weekend Weather Forecast-Fri PM
The latest NAM and GFS models are in and show the cold front moving through earlier than had been previously predicted. The NAM cuts off the precipitation during the mid morning and the GFS cuts it off by noon or 1 PM for Philadelphia.
With the passage of the cold front, windy conditions will develop, as cooler air moves in later Saturday and Saturday night. Sunday will have below normal high temps and may remain windy. An upper air disturbance will bring some clouds, maybe sprinkles or snow flurries late.
Sat 3/3 Cloudy with rain and showers, ending before noon. Becoming sunny. Mild. Becoming windy. High temp 57
Sun 3/4: Considerable cloudiness, still somewhat windy and cooler. Chance of a sprinkle or snow flurry late. High 47.
posted: Mar 02 2012 at 10:13 pm
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Philadelphia Weekend Weather Forecast-Fri AM
The latest NAM and GFS models are in and show the cold front moving through earlier than had been previously predicted. The NAM cuts off the precipitation during the mid morning and the GFS cuts it off by noon or 1 PM for Philadelphia.
With the passage of the cold front, windy conditions will develop, as cooler air moves in later Saturday and Saturday night. Sunday will have below normal high temps and may remain windy. An upper air disturbance will bring some clouds, maybe sprinkles or snow flurries late.
Sat 3/3 Cloudy with rain and showers, ending towards noon or 1 PM. Mild. Becoming windy. High temp 57
Sun 3/4: Considerable cloudiness, still somewhat windy and cooler. Chance of a sprinkle or snow flurry late. High 47.
posted: Mar 02 2012 at 12:00 pm
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Sat, 25 Feb 2012Weather Update- Sat AM
An upper air disturbance has generated some strong snow flurry activity in a band north and west of Philadelphia. Undetected by the models last night.
Sat 2/25: Snow Flurries ending during the early afternoon. A coating possible on some surfaces. High 40.
Sun 2/26: Sunny. High 46.
posted: Feb 25 2012 at 10:33 am
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Fri, 24 Feb 2012Philadelphia Weekend Weather Forecast - Fri
A relatively strong cold front (at least for this winter) will move through this evening, as low pressure develops along the coast. A strong pressure gradient will result in high winds both this evening and during the day on Saturday
Sat 2/25: A mix of clouds and sun, very windy. High 43.
Sun 2/26: Sunny. High 46.
posted: Feb 24 2012 at 5:41 pm
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Sun, 19 Feb 2012Philly Weather Update- Sun AM
The models are keeping the low pressure system to our south today. Some cloudiness still expected, but some sunshine as well. Little or no precipitation in the PHL area.
Sun 2/19: Partly sunny/partly cloudy. High 44.
posted: Feb 19 2012 at 8:34 am
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Fri, 17 Feb 2012Philadelphia Weekend Weather Forecast - Fri PM
High pressure will exit on Saturday as low pressure moves in from the southwest on Sunday. Some degree of intensification is expected with this low, as the upper air pattern sharpens and brings down some cold air. The latest GFS keeps the precipitation to the south of Philadelphia.
Sat 2/18: Partly sunny, some mid-level cloudiness late morning and early afternoon. High 46.
Sun 2/19: Cloudy. Some light rain or snow showers late afternoon or evening. High 40.
posted: Feb 17 2012 at 8:37 pm
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Thu, 16 Feb 2012Philadelphia Weekend Weather Forecast - Thu AM
High pressure will exit on Saturday as low pressure moves in from the southwest on Sunday. Some degree of intensification is expected with this low, as the upper air pattern sharpens and brings down some cold air. Nonetheless, the precip is expected to start as rain on Sunday, and likely will turn to some wet snow before ending in the evening. Because the temperatures are at or just above freezing, little accumulation is expected, perhaps a coating to an inch.
Sat 2/18: Sunny most of the day, some increase in cloudiness late in the afternoon. High 46.
Sun 2/19: Cloudy with light rain, mixing with and changing to light wet snow by the late afternoon. Little accumulation (coating to an inch) expected at this time by evening. High 38.
posted: Feb 16 2012 at 7:33 am
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Sat, 11 Feb 2012Philly Winter Weather Update- Sat 11 AM
The latest NAM and GFS model output just became available. Both models have periods of snow showers and flurries developing as the arctic front moves through later this afternoon, about 3-5 PM and again this evening about 9 PM. As the front approaches and moves through, winds will increase from the west and northwest.
Based on both models, another coating to an inch of snow is likely by evening; this time around temperatures will be fallling so that icey road conditions are possible this evening.
posted: Feb 11 2012 at 11:04 am
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Philly Winter Weather Update- Sat 8 AM
The 1 AM runs of the GFS and NAM continue with light snow in the morning and light flurries in the afternoon. The current snow is in-line with the predictions of last night. The NAM includes another burst of an inch of snow this evening as the arctic front moves through.
posted: Feb 11 2012 at 8:34 am
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Fri, 10 Feb 2012Philly Winter Weather Update- Fri 7PM
This afternoon's GFS and NAM model runs have cut back on the precipitation expected later this evening and tomorrow morning. Total QPF values are closer to 0.20 inches water, some of which will fall as rain or very wet snow before a change over to snow towards morning.
So it's looking like a minimal snow for the immediate PHL area. The next model runs become available about 9:15 PM for the NAM and about 10:45 for the GFS. I'll update if things change.
posted: Feb 10 2012 at 7:39 pm
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Philly Winter Weather Update- Fri 10AM
The latest NAM data just became available. It shows over 0.40+ inches of water falling as a mix of rain and snow starting late Friday night and ending as all snow during the morning on Saturday.
Temperatures around sunrise will dip to freezing. Temperatures aloft support snow for much of the time, although the amount of surface melt is uncertain. More on grassy surfaces still likely, although early morning driving Saturday may be challenging.
Areas to the north and west of Philadelphia will have less total QPF (QPF, or quantity of precipatiion falling), but more will be in the form of accumulating snowfall.
Either way, the current trend is towards more precipitation and as much as 2-3 inches is now possible when all is said and done. This system is still evolving, so expect further changes in the forecast.
posted: Feb 10 2012 at 10:26 am
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Philadelphia Weekend Weather Forecast - Fri AM
An interesting forecast for this evening, as both the NAM and GFS forecast low pressure to form on the NC coast and move up and away. Enough cold air aloft will allow most to fall as wet snow, but both models now keep the ground surface temperatures above freezing. The NAM cranks out considerable precipitation, which if were all snow would be over 4 inches. However, with surface temperatures forecast to be in the mid 30s, it's hard to see how there will be much accumulation.
So a grassy surface accumulation is most likely in the city area, but areas north and west will have less precipitation but greater likelihood of surface accumulations. With so many variables, confidence in any accumulation forecast is very low at this time.
I'll update later this afternoon and again this evening. Stay tuned.
Sat 2/11: Cloudy with light snow ending during the morning. Some flurries in the afternoon. Windy and much colder. High 35.
Sun 2/12: Sunny windy and very cold. High 29.
posted: Feb 10 2012 at 8:48 am
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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.
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