Forecast Details for Allston, MA

Recent Locations: Allston, MA  
Tonight: Cloudy, with a low around 45. East wind around 5 mph.
Sunday: A chance of showers, mainly after 4pm. Cloudy, with a high near 57. Southeast wind 6 to 9 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night: Showers. Patchy fog after 10pm. Low around 49. South wind around 9 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday: A chance of showers, mainly before 1pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 73. Southwest wind around 9 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night: A slight chance of showers between 8pm and 3am. Mostly cloudy, with a low around 54. Southwest wind around 7 mph becoming northwest after midnight. Chance of precipitation is 20%.
Tuesday: A chance of showers, mainly after 5pm. Mostly sunny, with a high near 75. North wind 7 to 9 mph becoming southeast in the afternoon. Chance of precipitation is 30%.
Tuesday Night: A chance of showers after 3am. Partly cloudy, with a low around 53. South wind 7 to 9 mph becoming north after midnight. Chance of precipitation is 30%.
Wednesday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 65. East wind 8 to 13 mph. Chance of precipitation is 60%.
Wednesday Night: Showers likely, mainly before 9pm. Mostly cloudy, with a low around 51. Southeast wind 10 to 13 mph becoming north after midnight. Chance of precipitation is 60%.
Thursday: A chance of showers. Mostly cloudy, with a high near 63. East wind 10 to 14 mph. Chance of precipitation is 50%.
Thursday Night: Showers likely. Mostly cloudy, with a low around 50. Northeast wind around 11 mph. Chance of precipitation is 60%.
Friday: A chance of showers. Mostly cloudy, with a high near 63. North wind 10 to 14 mph. Chance of precipitation is 30%.
Friday Night: A chance of showers. Mostly cloudy, with a low around 48. North wind 10 to 14 mph. Chance of precipitation is 50%.
Saturday: A chance of showers. Partly sunny, with a high near 61. Northeast wind 11 to 15 mph. Chance of precipitation is 50%.

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

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Weather Topic: What is Condensation?

Home - Education - Precipitation - Condensation

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