Forecast Details for Chatham, MA

Recent Locations: Elverta, CA Bloomington Springs, TN Chatham, MA

Today: Showers likely, mainly after 4pm. Patchy fog before 11am, then patchy fog after noon. Otherwise, mostly cloudy, with a high near 50. Southwest wind 11 to 17 mph, with gusts as high as 30 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 7 to 11 mph, with gusts as high as 21 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 around 14 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 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