Forecast Details for Allentown, PA

Recent Locations: Evinston, FL Providence, KY Allentown, PA

Current Alerts for Allentown, PA: Winter Storm Warning

Today: A chance of snow, mainly before 11am. Patchy blowing snow. Mostly cloudy, with a high near 36. Breezy, with a north wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 50%. Total daytime snow accumulation of 1 to 2 inches possible.

Tonight: Patchy blowing snow before midnight. Mostly cloudy, with a low around 20. Northwest wind 10 to 15 mph.

Tuesday: Mostly sunny, with a high near 31. West wind around 10 mph, with gusts as high as 20 mph.

Tuesday Night: Snow likely after 1am. Increasing clouds, with a low around 19. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

Wednesday: A chance of rain and snow before 10am, then a chance of rain between 10am and 1pm. Partly sunny, with a high near 43. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

Wednesday Night: Mostly clear, with a low around 25.

Thursday: Snow likely after 1pm. Partly sunny, with a high near 40. Chance of precipitation is 60%.

Thursday Night: Rain and snow likely before 1am, then a chance of rain. Mostly cloudy, with a low around 29. Chance of precipitation is 60%.

Friday: Mostly sunny, with a high near 42.

Friday Night: Mostly clear, with a low around 26.

Saturday: Sunny, with a high near 48.

Saturday Night: Partly cloudy, with a low around 30.

Sunday: Partly sunny, with a high near 46.

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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