Forecast Details for Philadelphia, PA

Recent Locations: Philadelphia, PA  
Tonight: Increasing clouds, with a low around 25. Northwest wind 5 to 15 mph.
Saturday: Snow, mainly after 4pm. High near 33. Northwest wind 5 to 10 mph becoming southeast in the afternoon. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Saturday Night: Rain, snow, freezing rain, and sleet, becoming all rain after 1am. Low around 31. Southeast wind 5 to 10 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New ice accumulation of 0.1 to 0.2 of an inch possible. New snow and sleet accumulation of less than a half inch possible.
Sunday: Cloudy through mid morning, then gradual clearing, with a high near 40. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night: Mostly cloudy, with a low around 26. Northwest wind around 5 mph becoming calm.
Monday: Mostly sunny, with a high near 37.
Monday Night: Mostly cloudy, with a low around 24.
Tuesday: Snow likely, mainly after 1pm. Cloudy, with a high near 35. Chance of precipitation is 70%.
Tuesday Night: Snow, mainly before 1am. Low around 29. Chance of precipitation is 80%.
Wednesday: A chance of rain and snow. Mostly cloudy, with a high near 36. Chance of precipitation is 50%.
Wednesday Night: Rain and snow. Low around 30. Chance of precipitation is 80%.
Thursday: Rain and snow likely. Mostly cloudy, with a high near 43. Chance of precipitation is 70%.
Thursday Night: A chance of rain and snow. Mostly cloudy, with a low around 26. Chance of precipitation is 30%.
Friday: Partly sunny, with a high near 36.

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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