Forecast Details for Philadelphia, PA

Recent Locations: Saint Mary, MO   Philadelphia, PA  
Today: Mostly sunny, with a high near 86. Southeast wind 5 to 10 mph.
Tonight: Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 65. Southeast wind around 5 mph.
Wednesday: A slight chance of showers between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 80. South wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Cloudy, with a low around 69. South wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Thursday: Showers and thunderstorms likely, mainly before 2pm. Partly sunny, with a high near 86. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night: A slight chance of showers and thunderstorms before 11pm. Partly cloudy, with a low around 66. Chance of precipitation is 20%.
Friday: Sunny, with a high near 82.
Friday Night: Partly cloudy, with a low around 61.
Saturday: Mostly sunny, with a high near 80.
Saturday Night: Partly cloudy, with a low around 61.
Sunday: A chance of showers. Mostly sunny, with a high near 80. Chance of precipitation is 30%.
Sunday Night: A chance of showers. Partly cloudy, with a low around 62. Chance of precipitation is 30%.
Monday: A chance of showers. Mostly sunny, with a high near 80. Chance of precipitation is 30%.

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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 Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation

Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds