Forecast Details for Tionesta, PA

Recent Locations: Keenes, IL Underhill Center, VT Tionesta, PA

Overnight: Increasing clouds, with a low around 15. Light northeast wind.

Monday: Mostly cloudy through mid morning, then gradual clearing, with a high near 40. Light and variable wind becoming south around 6 mph in the afternoon.

Monday Night: A chance of freezing rain after 1am. Increasing clouds, with a low around 27. Southeast wind around 7 mph. Chance of precipitation is 30%.

Tuesday: Rain or freezing rain, becoming all rain after 10am. High near 45. Southeast wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

Tuesday Night: Rain, mainly before 1am. Low around 40. South wind 3 to 6 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

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

Wednesday Night: Rain likely. Mostly cloudy, with a low around 50. Chance of precipitation is 70%.

Thursday: Rain likely. Mostly cloudy, with a high near 63. Chance of precipitation is 70%.

Thursday Night: Rain likely. Mostly cloudy, with a low around 51. Chance of precipitation is 70%.

Friday: A chance of rain. Partly sunny, with a high near 68. Chance of precipitation is 50%.

Friday Night: A chance of rain. Mostly cloudy, with a low around 53. Chance of precipitation is 50%.

Saturday: Rain likely. Mostly cloudy, with a high near 69. Chance of precipitation is 70%.

Saturday Night: A chance of rain. Mostly cloudy, with a low around 42. Chance of precipitation is 50%.

Sunday: A chance of rain. Partly sunny, with a high near 61. 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 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