Forecast Details for Williamstown, NY

Recent Locations: Columbia Station, OH Bethel, DE Williamstown, NY

Current Alerts for Williamstown, NY: Flood Watch

Overnight: A chance of showers. Areas of fog. Otherwise, mostly cloudy, with a low around 40. West wind around 8 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday: Patchy fog between 9am and 10am. Otherwise, mostly cloudy, with a high near 43. Northwest wind 7 to 9 mph.

Wednesday Night: Mostly cloudy, with a low around 35. Northeast wind 3 to 6 mph.

Thursday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 47. East wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Thursday Night: Showers likely, with thunderstorms also possible after 2am. Mostly cloudy, with a low around 42. Southeast wind 11 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday: Showers likely and possibly a thunderstorm before 11am, then showers likely between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 72. Southeast wind around 10 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday Night: Mostly cloudy, with a low around 44. West wind around 6 mph becoming calm after midnight.

Saturday: Showers likely after 2pm. Mostly cloudy, with a high near 70. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 60%.

Saturday Night: Showers. Low around 44. Chance of precipitation is 80%.

Sunday: Showers, mainly before 2pm. High near 56. Chance of precipitation is 80%.

Sunday Night: A chance of rain and snow showers. Mostly cloudy, with a low around 30. Chance of precipitation is 30%.

Monday: A chance of snow showers. Partly sunny, with a high near 41. Chance of precipitation is 30%.

Monday Night: Partly cloudy, with a low around 27.

Tuesday: Partly sunny, with a high near 42.

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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)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

Weather Topic: What are Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds

Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain