Forecast Details for Boston, MA

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Tonight: Mostly cloudy, with a low around 12. Calm wind becoming northwest around 5 mph after midnight.

Friday: Mostly cloudy, with a high near 28. North wind 3 to 6 mph.

Friday Night: A chance of snow, mainly after 1am. Patchy fog after 5am. Otherwise, cloudy, with a low around 21. Calm wind. Chance of precipitation is 40%. Little or no snow accumulation expected.

Saturday: Snow. Patchy fog before 8am. High near 28. Light north wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

Saturday Night: A chance of snow, mainly before 11pm. Mostly cloudy, with a low around 3. Northwest wind around 14 mph, with gusts as high as 29 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

Sunday: Mostly sunny, with a high near 16. Northwest wind 11 to 14 mph, with gusts as high as 25 mph.

Sunday Night: Partly cloudy, with a low around 2. Northwest wind 8 to 10 mph, with gusts as high as 24 mph.

Monday: Sunny, with a high near 21. Northwest wind 8 to 10 mph, with gusts as high as 20 mph.

Monday Night: Mostly clear, with a low around 6. Northwest wind around 7 mph.

Tuesday: Mostly sunny, with a high near 30. Northwest wind around 7 mph.

Tuesday Night: Partly cloudy, with a low around 12. West wind 3 to 5 mph.

Wednesday: Mostly sunny, with a high near 34. Northwest wind around 6 mph.

Wednesday Night: A chance of snow. Partly cloudy, with a low around 23. North wind around 6 mph becoming west in the evening. Chance of precipitation is 30%.

Thursday: Mostly sunny, with a high near 36. Northwest wind around 7 mph.

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North America Water Vapor (Moisture)

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Weather Topic: What are Altocumulus Clouds?

Home - Education - Cloud Types - Altocumulus Clouds

Next Topic: Altostratus Clouds

Similar to cirrocumulus clouds, altocumulus clouds are characterized by cloud patches. They are distinguished by larger cloudlets than cirrocumulus clouds but are still smaller than stratocumulus clouds.

Altocumulus clouds most commonly form in middle altitudes (between 2 and 5 km) and may resemble, at times, the shape of a flying saucer. These uncommon formations, called altocumulus lenticularis, are created by uplift in the atmosphere and are most often seen in close proximity to mountains.

Next Topic: Altostratus Clouds

Weather Topic: What are Cirrocumulus Clouds?

Home - Education - Cloud Types - Cirrocumulus Clouds

Next Topic: Cirrostratus Clouds

Cirrocumulus clouds form at high altitudes (usually around 5 km) and have distinguishing characteristics displayed in a fine layer of small cloud patches. These small cloud patches are sometimes referred to as "cloudlets" in relation to the whole cloud formation.

Cirrocumulus clouds are formed from ice crystals and water droplets. Often, the water droplets in the cloud freeze into ice crystals and the cloud becomes a cirrostratus cloud. Because of this common occurrence, cirrocumulus cloud formations generally pass rapidly.

Next Topic: Cirrostratus Clouds