Forecast Details for Westford, MA

Recent Locations: Dickson, TN Walnut Cove, NC Westford, MA

Overnight: A chance of showers, mainly after 3am. Cloudy, with a low around 38. Southeast wind around 7 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

Sunday: Showers and possibly a thunderstorm. Patchy fog before noon. High near 59. Light south wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday Night: A chance of showers, mainly before 7pm. Cloudy during the early evening, then gradual clearing, with a low around 35. West wind 7 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

Monday: Increasing clouds, with a high near 50. West wind 11 to 15 mph, with gusts as high as 28 mph.

Monday Night: A chance of snow showers, mainly after 3am. Partly cloudy, with a low around 31. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%. Little or no snow accumulation expected.

Tuesday: A chance of rain and snow showers before 11am, then a chance of rain showers between 11am and 5pm, then a chance of rain and snow showers after 5pm. Partly sunny, with a high near 46. West wind 5 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

Tuesday Night: A chance of snow showers before 7pm. Mostly clear, with a low around 24. Northwest wind around 6 mph. Chance of precipitation is 30%.

Wednesday: Sunny, with a high near 49. Light and variable wind becoming southwest around 5 mph in the afternoon.

Wednesday Night: Mostly clear, with a low around 30. South wind around 5 mph.

Thursday: Sunny, with a high near 59. South wind 5 to 10 mph, with gusts as high as 21 mph.

Thursday Night: Partly cloudy, with a low around 41. Southwest wind 6 to 8 mph.

Friday: Mostly sunny, with a high near 68. Southwest wind 5 to 8 mph.

Friday Night: Partly cloudy, with a low around 45. Southwest wind around 6 mph.

Saturday: Partly sunny, with a high near 66. Southwest wind 5 to 7 mph.

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National Weather Forecast--Current

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North America Water Vapor (Moisture)

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Weather Topic: What are Cirrostratus Clouds?

Home - Education - Cloud Types - Cirrostratus Clouds

Next Topic: Cirrus Clouds

Cirrostratus clouds are high, thin clouds that form above 20,000 feet and are made mostly of ice crystals. They sometimes look like giant feathers, horse tails, or curls of hair in the sky. These clouds are pushed by the jet stream and can move at high speeds reaching 100 mph.

What do they indicate?
They indicate that a precipitation is likely within 24 hours.

Next Topic: Cirrus Clouds

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