Forecast Details for Altoona, PA

Recent Locations: John F Kennedy International Airport, NY Astoria, NY Altoona, PA

Tonight: Mostly clear, with a low around 51. South wind around 6 mph.

Tuesday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 84. Southwest wind 5 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tuesday Night: Showers and thunderstorms likely. Mostly cloudy, with a low around 55. West wind 8 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday: Mostly sunny, with a high near 73. Northwest wind around 8 mph.

Wednesday Night: A slight chance of showers after 2am. Mostly cloudy, with a low around 51. Calm wind. Chance of precipitation is 20%.

Thursday: A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 78. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday Night: Showers likely, mainly before 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.

Friday: Showers likely, mainly after 8am. Mostly cloudy, with a high near 76. Chance of precipitation is 70%.

Friday Night: A chance of showers. Mostly cloudy, with a low around 49. Chance of precipitation is 50%.

Saturday: A chance of showers before 2pm. Partly sunny, with a high near 61. Chance of precipitation is 30%.

Saturday Night: Partly cloudy, with a low around 40.

Sunday: Sunny, with a high near 67.

Sunday Night: Mostly clear, with a low around 45.

Monday: Mostly sunny, with a high near 74.

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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 is Snow?

Home - Education - Precipitation - Snow

Snow Next Topic: Stratocumulus Clouds

Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake, has unique characteristics, but all of them grow in a hexagonal structure. Snowfall can last for sustained periods of time and result in significant buildup of snow on the ground.

On the earth's surface, snow starts out light and powdery, but as it begins to melt it tends to become more granular, producing small bits of ice which have the consistency of sand. After several cycles of melting and freezing, snow can become very dense and ice-like, commonly known as snow pack.

Next Topic: Stratocumulus Clouds

Weather Topic: What are Stratus Clouds?

Home - Education - Cloud Types - Stratus Clouds

Next Topic: Wall Clouds

Stratus clouds are similar to altostratus clouds, but form at a lower altitude and are identified by their fog-like appearance, lacking the distinguishing features of most clouds.

Stratus clouds are wider than most clouds, and their base has a smooth, uniform look which is lighter in color than a nimbostratus cloud. The presence of a stratus cloud indicates the possibility of minor precipitation, such as drizzle, but heavier precipitation does not typically arrive in the form of a stratus cloud.

Next Topic: Wall Clouds