Forecast Details for Philadelphia, PA

Recent Locations: Philadelphia, PA

Tonight: Mostly clear, with a low around 53. Northeast wind around 5 mph.

Thursday: Partly sunny, with a high near 76. East wind 5 to 10 mph becoming southeast in the afternoon.

Thursday Night: A chance of showers before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 61. Southeast wind 5 to 10 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 86. Southwest wind 10 to 15 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Southwest wind 5 to 10 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 79. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday Night: Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.

Sunday: A chance of showers. Partly sunny, with a high near 70. Chance of precipitation is 40%.

Sunday Night: A chance of showers. Mostly cloudy, with a low around 52. Chance of precipitation is 40%.

Monday: A chance of showers. Partly sunny, with a high near 64. Chance of precipitation is 30%.

Monday Night: A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 40%.

Tuesday: A chance of showers. Partly sunny, with a high near 70. Chance of precipitation is 40%.

Tuesday Night: A chance of showers. Mostly cloudy, with a low around 58. Chance of precipitation is 40%.

Wednesday: A chance of showers. Partly sunny, with a high near 74. Chance of precipitation is 30%.

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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

National Weather Forecast for Tomorrow

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

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.

Weather Topic: What are Cirrostratus Clouds?

Home - Education - Cloud Types - Cirrostratus Clouds

Next Topic: Cirrus Clouds

Cirrostratus clouds are high, thin clouds that form above 20,000 feet and are made mostly of ice crystals. They sometimes look like giant feathers, horse tails, or curls of hair in the sky. These clouds are pushed by the jet stream and can move at high speeds reaching 100 mph.

What do they indicate?
They indicate that a precipitation is likely within 24 hours.

Next Topic: Cirrus Clouds

Weather Topic: What is Condensation?

Home - Education - Precipitation - Condensation

Next Topic: Contrails

Condensation is the process which creates clouds, and therefore it is a crucial process in the water cycle. Condensation is the change of matter from a state of gas into a state of liquid, and it happens because water molecules release heat into the atmosphere and become organized into a more closely packed structure, what we might see as water droplets.

Water is always present in the air around us as a vapor, but it's too small for us to see. When water undergoes the process of condensation it becomes organized into visible water droplets. You've probably seen condensation happen before on the surface of a cold drink!

Next Topic: Contrails