Forecast Details for Nantucket, MA

Recent Locations: Dudley, MA Baldwin, WI Nantucket, MA

Tonight: Patchy fog after 1am. Otherwise, cloudy, with a low around 40. Southeast wind around 16 mph.

Sunday: A chance of showers, then showers and possibly a thunderstorm after 2pm. Patchy fog before 2pm. High near 52. Breezy, with a southwest wind 18 to 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday Night: Showers, mainly before midnight. Low around 39. Southwest wind 11 to 16 mph becoming northwest after midnight. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

Monday: Sunny, with a high near 47. West wind 13 to 18 mph.

Monday Night: Partly cloudy, with a low around 39. West wind 6 to 10 mph.

Tuesday: A chance of showers, mainly after 9am. Partly sunny, with a high near 47. Southwest wind 8 to 14 mph. Chance of precipitation is 30%.

Tuesday Night: Partly cloudy, with a low around 32. North wind 11 to 15 mph.

Wednesday: Sunny, with a high near 40. North wind 7 to 11 mph.

Wednesday Night: Mostly clear, with a low around 34. South wind 5 to 7 mph.

Thursday: Sunny, with a high near 49. South wind 8 to 13 mph.

Thursday Night: Partly cloudy, with a low around 41. South wind around 10 mph.

Friday: Mostly sunny, with a high near 51. Southwest wind 9 to 13 mph becoming northeast in the afternoon.

Friday Night: Partly cloudy, with a low around 41. Southeast wind around 9 mph becoming southwest after midnight.

Saturday: Mostly sunny, with a high near 49. West wind around 10 mph becoming south in the morning.

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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 is Condensation?

Home - Education - Precipitation - Condensation

Next Topic: Contrails

Condensation is the process which creates clouds, and therefore it is a crucial process in the water cycle. Condensation is the change of matter from a state of gas into a state of liquid, and it happens because water molecules release heat into the atmosphere and become organized into a more closely packed structure, what we might see as water droplets.

Water is always present in the air around us as a vapor, but it's too small for us to see. When water undergoes the process of condensation it becomes organized into visible water droplets. You've probably seen condensation happen before on the surface of a cold drink!

Next Topic: Contrails

Weather Topic: What are Cumulonimbus Clouds?

Home - Education - Cloud Types - Cumulonimbus Clouds

Cumulonimbus Clouds Next Topic: Cumulus Clouds

The final form taken by a growing cumulus cloud is the cumulonimbus cloud, which is very tall and dense. The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although most commonly they stop growing at an altitude of 6 km.

Even small cumulonimbus clouds appear very large in comparison to other cloud types. They can signal the approach of stormy weather, such as thunderstorms or blizzards.

Next Topic: Cumulus Clouds