Forecast Details for Philadelphia, PA

Recent Locations: Dallas, TX Boston, MA Philadelphia, PA

Tonight: Increasing clouds, with a low around 47. South wind 10 to 15 mph.

Monday: A chance of showers between 11am and 5pm. Partly sunny, with a high near 66. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

Monday Night: A chance of showers, mainly after 2am. Mostly cloudy, with a low around 58. Southwest wind around 5 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

Tuesday: A chance of showers before 2pm. Partly sunny, with a high near 78. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

Tuesday Night: Partly cloudy, with a low around 65. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

Wednesday: Showers likely, mainly after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday Night: Showers likely and possibly a thunderstorm before 8pm, then rain likely and possibly a thunderstorm between 8pm and 2am, then a chance of rain after 2am. Mostly cloudy, with a low around 54. Chance of precipitation is 70%.

Thursday: A chance of rain. Mostly cloudy, with a high near 63. Chance of precipitation is 40%.

Thursday Night: A chance of rain. Mostly cloudy, with a low around 49. Chance of precipitation is 50%.

Friday: A chance of rain. Mostly cloudy, with a high near 66. Chance of precipitation is 40%.

Friday Night: A chance of rain. Mostly cloudy, with a low around 51. Chance of precipitation is 50%.

Saturday: A chance of rain. Mostly cloudy, with a high near 65. Chance of precipitation is 40%.

Saturday Night: A chance of rain. Mostly cloudy, with a low around 48. Chance of precipitation is 50%.

Sunday: A chance of rain. Mostly cloudy, with a high near 71. Chance of precipitation is 50%.

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

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North America Water Vapor (Moisture)

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Weather Topic: What are Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds

Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain