Forecast Details for Philadelphia, PA

Recent Locations: Philadelphia, PA  
Today: Isolated showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 91. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
Tonight: Isolated showers and thunderstorms before midnight. Partly cloudy, with a low around 74. South wind around 5 mph. Chance of precipitation is 20%.
Monday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. South wind 5 to 10 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night: A chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 73. South wind 5 to 10 mph becoming light southwest after midnight. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8am. Partly sunny, with a high near 82. West wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday Night: A slight chance of showers before 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 20%.
Wednesday: Mostly sunny, with a high near 78.
Wednesday Night: Clear, with a low around 60.
Thursday: Sunny, with a high near 82.
Thursday Night: Mostly clear, with a low around 63.
Friday: Mostly sunny, with a high near 83.
Friday Night: Partly cloudy, with a low around 68.
Saturday: A chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 40%.

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Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

Current U.S. National Radar

National Weather Forecast--Current

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Today's National Weather Map

National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

Tomorrows National Weather Map

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.

North American Water Vapor Map

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

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