Forecast Details for Williston, VT

Recent Locations: Afton, OK Davisburg, MI Williston, VT

Today: A 30 percent chance of rain, mainly before 8am. Mostly cloudy, with a high near 40. North wind 8 to 10 mph. New precipitation amounts of less than a tenth of an inch possible.

Tonight: Mostly cloudy, with a low around 32. North wind around 5 mph becoming calm in the evening.

Thursday: A slight chance of rain showers, snow, and sleet between 10am and 11am, then a chance of rain showers. Mostly cloudy, with a high near 43. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 50%. Little or no snow and sleet accumulation expected.

Thursday Night: Showers likely, mainly after 4am. Cloudy, with a low around 36. Southeast wind 9 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday: Showers likely, mainly before 7am. Mostly cloudy, with a high near 62. South wind 14 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Friday Night: Mostly cloudy, with a low around 45. Southwest wind 7 to 10 mph becoming northwest after midnight. Winds could gust as high as 22 mph.

Saturday: A 30 percent chance of showers after 2pm. Mostly cloudy, with a high near 60. North wind around 6 mph becoming west in the afternoon.

Saturday Night: Showers, mainly after 8pm. Low around 44. Southeast wind 11 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 80%.

Sunday: Showers. High near 60. South wind 13 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.

Sunday Night: Showers likely, mainly before 8pm. Mostly cloudy, with a low around 32. West wind around 11 mph. Chance of precipitation is 60%.

Monday: Mostly cloudy, with a high near 43. Northwest wind around 11 mph, with gusts as high as 22 mph.

Monday Night: Partly cloudy, with a low around 26. Northwest wind around 6 mph.

Tuesday: Partly sunny, with a high near 42. Northwest wind 6 to 8 mph.

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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