Forecast Details for Philadelphia, PA

Recent Locations: Philadelphia, PA

Today: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 69. Calm wind becoming north around 5 mph in the morning. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Tonight: Showers, mainly after 2am. Low around 51. East wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday: Rain before 7am, then showers likely between 7am and 9am, then rain after 9am. High near 54. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday Night: Showers, mainly before 8pm. Low around 47. Northeast wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

Saturday: A slight chance of showers after 2pm. Partly sunny, with a high near 63. North wind around 5 mph becoming east in the afternoon. Chance of precipitation is 20%.

Saturday Night: A chance of showers, mainly after 8pm. Mostly cloudy, with a low around 48. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

Sunday: A chance of showers. Mostly cloudy, with a high near 60. Chance of precipitation is 50%.

Sunday Night: Partly cloudy, with a low around 48.

Monday: Mostly sunny, with a high near 72.

Monday Night: Partly cloudy, with a low around 56.

Tuesday: Partly sunny, with a high near 77.

Tuesday Night: A chance of showers. Mostly cloudy, with a low around 59. Chance of precipitation is 40%.

Wednesday: A chance of showers. Mostly cloudy, with a high near 72. 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)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

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