Forecast Details for Philadelphia, PA

Recent Locations: Philadelphia, PA  
Today: Sunny, with a high near 55. Northwest wind around 15 mph, with gusts as high as 30 mph.
Tonight: Clear, with a low around 38. Northwest wind around 10 mph, with gusts as high as 20 mph.
Saturday: A chance of showers, mainly after 3pm. Increasing clouds, with a high near 59. West wind 10 to 15 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night: A chance of showers, mainly before 8pm. Cloudy, then gradually becoming partly cloudy, with a low around 48. Calm wind becoming west around 5 mph in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday: Partly sunny, with a high near 64. Northwest wind around 10 mph.
Sunday Night: A chance of rain, mainly after 2am. Mostly cloudy, with a low around 46. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Monday: Rain likely, mainly after 8am. Cloudy, with a high near 53. Chance of precipitation is 70%.
Monday Night: Rain. Low around 46. Chance of precipitation is 90%.
Tuesday: Rain. High near 55. Chance of precipitation is 80%.
Tuesday Night: Rain likely. Mostly cloudy, with a low around 45. Chance of precipitation is 70%.
Wednesday: A chance of rain. Mostly cloudy, with a high near 55. Chance of precipitation is 50%.
Wednesday Night: A chance of showers. Mostly cloudy, with a low around 39. Breezy. Chance of precipitation is 30%.
Thursday: Mostly sunny, with a high near 53. Breezy.

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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

The Current National Weather Forecast and National Weather Map are shown below.

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 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

Weather Topic: What are Shelf Clouds?

Home - Education - Cloud Types - Shelf Clouds

Shelf Clouds Next Topic: Sleet

A shelf cloud is similar to a wall cloud, but forms at the front of a storm cloud, instead of at the rear, where wall clouds form.

A shelf cloud is caused by a series of events set into motion by the advancing storm; first, cool air settles along the ground where precipitation has just fallen. As the cool air is brought in, the warmer air is displaced, and rises above it, because it is less dense. When the warmer air reaches the bottom of the storm cloud, it begins to cool again, and the resulting condensation is a visible shelf cloud.

Next Topic: Sleet