Forecast Details for Boston, MA

Recent Locations: Boston, MA  
Tonight: Cloudy, with a low around 43. Northeast wind 3 to 5 mph.
Friday: Cloudy, then gradually becoming mostly sunny, with a high near 55. East wind 6 to 11 mph.
Friday Night: A chance of showers, mainly after midnight. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 46. South wind 8 to 10 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Saturday: A chance of showers, mainly before 11am. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 63. West wind 7 to 10 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night: Mostly clear, with a low around 40. West wind 10 to 13 mph.
Sunday: Sunny, with a high near 60. West wind 10 to 15 mph.
Sunday Night: Mostly clear, with a low around 41. West wind 11 to 14 mph.
Monday: Sunny, with a high near 62. West wind around 13 mph.
Monday Night: Mostly clear, with a low around 41. South wind around 10 mph becoming west after midnight.
Tuesday: Mostly sunny, with a high near 63. South wind 9 to 16 mph.
Tuesday Night: A chance of showers. Mostly cloudy, with a low around 47. South wind 15 to 17 mph. Chance of precipitation is 30%.
Wednesday: Showers likely. Mostly cloudy, with a high near 61. Breezy, with a south wind 16 to 20 mph becoming west in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 60%.
Wednesday Night: A chance of showers. Partly cloudy, with a low around 38. Northwest wind around 18 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.
Thursday: Sunny, with a high near 55. Northwest wind around 15 mph.

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Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

Current U.S. National Radar

National Weather Forecast--Current

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Today's National Weather Map

National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

Tomorrows National Weather Map

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.

North American Water Vapor Map

Weather Topic: What are Cirrus Clouds?

Home - Education - Cloud Types - Cirrus Clouds

Cirrus Clouds Next Topic: Condensation

Cirrus clouds are high-level clouds that occur above 20,000 feet and are composed mainly of ice crystals. They are thin and wispy in appearance.

What do they indicate?
They are often the first sign of an approaching storm.

Next Topic: Condensation

Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

Contrails Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds