Forecast Details for Philadelphia, PA

Recent Locations: Fresno, CA Boise, ID Philadelphia, PA

Tonight: Light snow likely, mainly before 5am. Cloudy, with a low around 13. Southwest wind 5 to 15 mph becoming northwest after midnight. Chance of precipitation is 60%. Total nighttime snow accumulation of less than one inch possible.

Saturday: A chance of light snow before 7am. Partly sunny, with a temperature falling to around 11 by 9am. Wind chill values as low as -10. Windy, with a northwest wind 25 to 30 mph, with gusts as high as 55 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

Saturday Night: Mostly clear, with a low around 5. Wind chill values as low as -12. Blustery, with a northwest wind 15 to 25 mph, with gusts as high as 45 mph.

Sunday: Sunny, with a high near 20. Wind chill values as low as -10. Northwest wind around 15 mph, with gusts as high as 30 mph.

Sunday Night: Mostly clear, with a low around 6. Northwest wind around 5 mph.

Monday: Partly sunny, with a high near 26.

Monday Night: Partly cloudy, with a low around 14.

Tuesday: Mostly sunny, with a high near 35.

Tuesday Night: Mostly cloudy, with a low around 24.

Wednesday: A chance of rain and snow. Mostly cloudy, with a high near 37. Chance of precipitation is 50%.

Wednesday Night: A chance of rain and snow. Mostly cloudy, with a low around 26. Chance of precipitation is 40%.

Thursday: Mostly cloudy, with a high near 35.

Thursday Night: Partly cloudy, with a low around 22.

Friday: Mostly sunny, with a high near 33.

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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

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 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

Weather Topic: What is Evaporation?

Home - Education - Precipitation - Evaporation

Next Topic: Fog

Evaporation is the process which returns water from the earth back to the atmosphere, and is another crucial process in the water cycle.

Evaporation is the transformation of liquid into gas, and it happens because molecules are excited by the application of energy and turn into vapor. In order for water to evaporate it has to be on the surface of a body of water.

Next Topic: Fog