Forecast Details for Allston, MA

Recent Locations: Merna, IL Apollo, PA Allston, MA

Today: Patchy fog before 1pm. Otherwise, mostly cloudy, with a high near 65. Light and variable wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 50. Southwest wind 7 to 10 mph, with gusts as high as 21 mph.

Saturday: Partly sunny, with a temperature rising to near 60 by 11am, then falling to around 47 during the remainder of the day. North wind 6 to 13 mph becoming east in the afternoon.

Saturday Night: Showers likely, mainly after 11pm. Cloudy, with a low around 40. East wind 5 to 8 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

Sunday: Showers. High near 64. Southwest wind 6 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.

Sunday Night: Showers, mainly before 8pm. Low around 39. West wind around 8 mph. Chance of precipitation is 80%.

Monday: Mostly sunny, with a high near 53. West wind 9 to 13 mph.

Monday Night: Partly cloudy, with a low around 35. West wind 3 to 7 mph.

Tuesday: A chance of showers after 3pm. Partly sunny, with a high near 50. West wind 3 to 8 mph. Chance of precipitation is 30%.

Tuesday Night: Partly cloudy, with a low around 30. Northwest wind around 7 mph.

Wednesday: Sunny, with a high near 49. North wind around 7 mph becoming east in the afternoon.

Wednesday Night: Mostly clear, with a low around 35. Southwest wind around 7 mph.

Thursday: Mostly sunny, with a high near 61. Southwest wind 7 to 13 mph, with gusts as high as 23 mph.

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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