Forecast Details for Philadelphia, PA

Your Recent Locations:  Philadelphia, PA  
This Afternoon: Cloudy, with a high near 41. Light southeast wind.
Tonight: Rain and snow, becoming all snow after 4am. Low around 28. Calm wind becoming northwest 5 to 7 mph after midnight. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Wednesday: Snow likely, mainly before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 33. Northwest wind 8 to 10 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Wednesday Night: Partly cloudy, with a low around 19. Northwest wind around 10 mph.
Thursday: Sunny, with a high near 35. West wind 9 to 11 mph.
Thursday Night: Mostly clear, with a low around 24.
Friday: Sunny, with a high near 42.
Friday Night: Mostly clear, with a low around 29.
Saturday: Sunny, with a high near 48.
Saturday Night: Partly cloudy, with a low around 35.
Sunday: Mostly sunny, with a high near 52.
Sunday Night: Mostly cloudy, with a low around 39.
Monday: A chance of rain. Mostly cloudy, with a high near 55. Chance of precipitation is 40%.

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Current U.S. National Radar--Current

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Weather Topic: What is Graupel?

Home - Education - Precipitation - Graupel

graupel Next Topic: Hail

Graupel is a form of precipitation that is created by atmospheric conditions which cause supercooled water droplets to contact snow crystals and freeze to their surface.

Sometimes known as soft hail or snow pellets, graupel is delicate and easily destroyed by touch. Whereas hail usually falls during severe weather, graupel doesn't require such conditions to form, and can form in mild precipitation similar to situations which produce snowfall.

Next Topic: Hail

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