Forecast Details for Boston, MA

Recent Locations: Decatur, AL Boston, MA

Tonight: Cloudy early, then gradual clearing, with a low around 49. Northwest wind 10 to 13 mph, with gusts as high as 26 mph.

Monday: Sunny, with a high near 73. Northwest wind 8 to 10 mph.

Monday Night: Mostly clear, with a low around 53. Light southwest wind.

Tuesday: Sunny, with a high near 77. Southwest wind 7 to 14 mph, with gusts as high as 24 mph.

Tuesday Night: Mostly cloudy, with a low around 58. Southwest wind 10 to 13 mph, with gusts as high as 24 mph.

Wednesday: Sunny, with a high near 72. Northwest wind 10 to 13 mph.

Wednesday Night: Partly cloudy, with a low around 45. Northwest wind around 6 mph.

Thursday: Mostly sunny, with a high near 65. North wind around 6 mph becoming south in the afternoon.

Thursday Night: A chance of showers after 2am. Mostly cloudy, with a low around 50. South wind around 6 mph. Chance of precipitation is 30%.

Friday: A chance of showers. Mostly cloudy, with a high near 71. South wind 7 to 11 mph. Chance of precipitation is 40%.

Friday Night: A chance of showers. Mostly cloudy, with a low around 52. Southwest wind 6 to 8 mph. Chance of precipitation is 40%.

Saturday: A chance of showers. Partly sunny, with a high near 68. West wind 6 to 10 mph. Chance of precipitation is 30%.

Saturday Night: Partly cloudy, with a low around 46. West wind around 7 mph.

Sunday: Mostly sunny, with a high near 65. Northwest wind 7 to 9 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

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

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.

Weather Topic: What are Contrails?

Home - Education - Cloud Types - 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

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle