Forecast Details for Altona, NY

Recent Locations: Benton Ridge, OH West Peterborough, NH Altona, NY

Tonight: Rain before 1am, then rain or freezing rain between 1am and 2am, then freezing rain likely after 2am. Low around 31. Light northwest wind. Chance of precipitation is 90%. Little or no ice accumulation expected.

Wednesday: Cloudy, with a high near 41. Northwest wind around 7 mph.

Wednesday Night: Mostly cloudy, with a low around 26. Calm wind.

Thursday: A chance of rain, snow, freezing rain, and sleet before 11am, then rain likely, possibly mixed with snow between 11am and 1pm, then rain likely after 1pm. Mostly cloudy, with a high near 41. Northeast wind 3 to 6 mph. Chance of precipitation is 70%. Little or no snow and sleet accumulation expected.

Thursday Night: Rain likely, mainly after 2am. Cloudy, with a low around 36. South wind 8 to 13 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday: Rain likely before 9am, then showers likely, mainly between 9am and 2pm. Mostly cloudy, with a high near 68. South wind 11 to 14 mph, with gusts as high as 33 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Friday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 40. West wind 8 to 10 mph, with gusts as high as 21 mph.

Saturday: A 40 percent chance of rain after 2pm. Mostly cloudy, with a high near 56. Northwest wind around 6 mph becoming east in the afternoon.

Saturday Night: Rain, mainly after 8pm. Low around 45. South wind 5 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.

Sunday: Rain. High near 58. Southwest wind around 11 mph, with gusts as high as 24 mph. Chance of precipitation is 80%.

Sunday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 31. West wind around 9 mph.

Monday: Mostly sunny, with a high near 42. West wind around 10 mph, with gusts as high as 21 mph.

Monday Night: Partly cloudy, with a low around 27. Northwest wind 3 to 6 mph.

Tuesday: Mostly sunny, with a high near 44. North wind around 6 mph.

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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

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