Forecast Details for Ottsville, PA

Recent Locations: Newton Lower Falls, MA Destin, FL Ottsville, PA

Tonight: Clear, with a low around 42. Southwest wind around 5 mph becoming calm.

Tuesday: Sunny, with a high near 74. Calm wind becoming southwest around 5 mph in the afternoon.

Tuesday Night: Patchy fog after 2am. Otherwise, mostly clear, with a low around 51. Calm wind.

Wednesday: A chance of showers after 2pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 75. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday Night: Showers likely, with thunderstorms also possible after 11pm. Mostly cloudy, with a low around 47. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday: A chance of rain before 2pm, then a chance of rain and snow. Mostly cloudy, with a high near 56. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

Thursday Night: A chance of snow before 8pm. Partly cloudy, with a low around 29. Chance of precipitation is 30%.

Friday: Partly sunny, with a high near 47.

Friday Night: A chance of rain between 8pm and 2am. Mostly cloudy, with a low around 36. Chance of precipitation is 30%.

Saturday: Partly sunny, with a high near 50.

Saturday Night: Mostly cloudy, with a low around 34.

Sunday: Mostly cloudy, with a high near 59.

Sunday Night: Rain likely. Mostly cloudy, with a low around 41. Chance of precipitation is 70%.

Monday: Rain likely. Mostly cloudy, with a high near 52. Chance of precipitation is 60%.

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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)

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Weather Topic: What are Shelf Clouds?

Home - Education - Cloud Types - Shelf Clouds

Shelf Clouds Next Topic: Sleet

A shelf cloud is similar to a wall cloud, but forms at the front of a storm cloud, instead of at the rear, where wall clouds form.

A shelf cloud is caused by a series of events set into motion by the advancing storm; first, cool air settles along the ground where precipitation has just fallen. As the cool air is brought in, the warmer air is displaced, and rises above it, because it is less dense. When the warmer air reaches the bottom of the storm cloud, it begins to cool again, and the resulting condensation is a visible shelf cloud.

Next Topic: Sleet

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