Forecast Details for York, PA

Recent Locations: Glasco, NY York, PA

Today: A chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 91. Heat index values as high as 100. South wind 3 to 6 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight: Showers and thunderstorms likely before 5am, then a slight chance of showers. Cloudy, then gradually becoming partly cloudy, with a low around 73. South wind 3 to 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 11am. Mostly sunny and hot, with a high near 93. Heat index values as high as 102. West wind 6 to 10 mph. Chance of precipitation is 30%.

Thursday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 74. West wind around 6 mph. Chance of precipitation is 30%.

Friday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Northwest wind around 6 mph. Chance of precipitation is 30%. 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 before 8pm. Partly cloudy, with a low around 66. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday: A chance of showers after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 40%.

Saturday Night: A chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 71. Chance of precipitation is 50%.

Sunday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 86. Chance of precipitation is 70%.

Sunday Night: Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.

Monday: A chance of showers. Mostly sunny, with a high near 85. Chance of precipitation is 30%.

Monday Night: A chance of showers. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.

Tuesday: A chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 40%.

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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 Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds

Weather Topic: What is Precipitation?

Home - Education - 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