Forecast Details for Boston, MA

Recent Locations: Boston, MA  
Current Alerts for Boston, MA: Wind Advisory
Today: Showers, mainly after 11am. The rain could be heavy at times. Patchy fog after 3pm. High near 64. Breezy, with a light southeast wind increasing to 15 to 20 mph in the morning. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Tonight: Showers and possibly a thunderstorm before 1am, then a chance of showers. Some of the storms could produce heavy rainfall. Patchy fog before 1am, then patchy fog after 4am. Low around 58. Breezy, with a south wind 17 to 22 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 50 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday: A chance of showers, mainly between 7am and 8am. Patchy fog between 8am and 9am. Otherwise, mostly cloudy, with a temperature falling to around 52 by 5pm. South wind 7 to 13 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night: A chance of showers, mainly before 9pm. Mostly cloudy, with a low around 37. Southwest wind 7 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday: A slight chance of showers before 4pm. Partly sunny, with a high near 47. Southwest wind 7 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Wednesday Night: Mostly clear, with a low around 33. Southwest wind around 9 mph.
Thursday: Sunny, with a high near 49. West wind 8 to 10 mph, with gusts as high as 20 mph.
Thursday Night: Partly cloudy, with a low around 36. Southwest wind 6 to 8 mph.
Friday: Partly sunny, with a high near 51. Southwest wind 6 to 10 mph.
Friday Night: A chance of showers. Mostly cloudy, with a low around 38. West wind 6 to 8 mph. Chance of precipitation is 30%.
Saturday: A chance of showers. Partly sunny, with a high near 49. West wind 5 to 8 mph. Chance of precipitation is 30%.
Saturday Night: A chance of showers. Mostly cloudy, with a low around 37. Northwest wind around 7 mph. Chance of precipitation is 30%.
Sunday: A chance of showers. Partly sunny, with a high near 48. North wind 6 to 9 mph becoming west in the afternoon. Chance of precipitation is 30%.

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Current U.S. National Radar--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 are Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation

Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds