Forecast Details for Philadelphia International Airport, PA

Recent Locations: Philadelphia International Airport, PA

Today: A slight chance of showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 94. Heat index values as high as 103. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

Tonight: Partly cloudy, with a low around 75. West wind 5 to 10 mph.

Friday: Mostly sunny, with a high near 86. Northwest wind around 5 mph.

Friday Night: Partly cloudy, with a low around 70. Northwest wind around 5 mph becoming calm.

Saturday: A chance of showers, with thunderstorms also possible after 5pm. Partly sunny, with a high near 86. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday Night: A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday: A chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 88. Chance of precipitation is 40%.

Sunday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 69. Chance of precipitation is 30%.

Monday: Mostly sunny, with a high near 85.

Monday Night: Partly cloudy, with a low around 66.

Tuesday: Sunny, with a high near 85.

Tuesday Night: Partly cloudy, with a low around 68.

Wednesday: Mostly sunny, with a high near 88.

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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)

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Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle