Forecast Details for Chatham, MA

Recent Locations: Willis, TX Roggen, CO Chatham, MA

This Afternoon: Showers likely, mainly after 5pm. Mostly cloudy, with a high near 52. Southwest wind 10 to 14 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Tonight: Showers. Patchy fog. Low around 38. Northeast wind 11 to 15 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Thursday: Showers likely, mainly before noon. Patchy fog. Otherwise, cloudy, with a high near 41. Northeast wind 13 to 18 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Thursday Night: A slight chance of showers before 2am. Patchy fog before 9pm. Otherwise, cloudy, with a low around 37. East wind 6 to 10 mph. Chance of precipitation is 20%.

Friday: Mostly cloudy, with a high near 50. Southeast wind 6 to 13 mph becoming southwest in the afternoon.

Friday Night: Mostly cloudy, with a low around 44. Southwest wind 11 to 14 mph, with gusts as high as 24 mph.

Saturday: Partly sunny, with a high near 51. West wind around 9 mph becoming east in the afternoon.

Saturday Night: Mostly cloudy, with a low around 40. East wind around 9 mph becoming south after midnight.

Sunday: A chance of showers after 9am. Mostly cloudy, with a high near 53. South wind 13 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.

Sunday Night: Showers likely, mainly before 3am. Mostly cloudy, with a low around 39. Southwest wind 10 to 14 mph. Chance of precipitation is 60%.

Monday: A chance of showers. Mostly sunny, with a high near 47. Northwest wind 8 to 10 mph. Chance of precipitation is 30%.

Monday Night: Mostly clear, with a low around 37. Northwest wind around 7 mph.

Tuesday: Mostly sunny, with a high near 44. North wind around 8 mph becoming east in the afternoon.

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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