Forecast Details for Boston, MA

Recent Locations: Boston, MA  
Tonight: Clear, with a low around 8. Wind chill values as low as -1. Northwest wind 6 to 9 mph.
Monday: Sunny, with a high near 26. Wind chill values as low as zero. Northwest wind around 5 mph becoming light and variable.
Monday Night: Snow showers likely, mainly after 5am. Increasing clouds, with a low around 20. Southwest wind 3 to 6 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Tuesday: Snow showers likely, mainly before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 35. Southwest wind around 6 mph becoming north in the afternoon. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Tuesday Night: Partly cloudy, with a low around 20. North wind around 6 mph.
Christmas Day: Mostly sunny, with a high near 31. North wind around 7 mph.
Wednesday Night: Mostly cloudy, with a low around 24. Light northwest wind.
Thursday: Mostly sunny, with a high near 34. North wind around 6 mph.
Thursday Night: Partly cloudy, with a low around 24. Light north wind.
Friday: Mostly sunny, with a high near 37. North wind 3 to 6 mph.
Friday Night: Partly cloudy, with a low around 25. Light north wind.
Saturday: Mostly sunny, with a high near 39. North wind 3 to 6 mph.
Saturday Night: Mostly cloudy, with a low around 30. Light north wind.
Sunday: Mostly cloudy, with a high near 41. North wind 5 to 8 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

The Current National Weather Forecast and National Weather Map are shown below.

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 Shelf Clouds?

Home - Education - Cloud Types - Shelf Clouds

Shelf Clouds Next Topic: Sleet

A shelf cloud is similar to a wall cloud, but forms at the front of a storm cloud, instead of at the rear, where wall clouds form.

A shelf cloud is caused by a series of events set into motion by the advancing storm; first, cool air settles along the ground where precipitation has just fallen. As the cool air is brought in, the warmer air is displaced, and rises above it, because it is less dense. When the warmer air reaches the bottom of the storm cloud, it begins to cool again, and the resulting condensation is a visible shelf cloud.

Next Topic: Sleet

Weather Topic: What is Snow?

Home - Education - Precipitation - Snow

Snow Next Topic: Stratocumulus Clouds

Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake, has unique characteristics, but all of them grow in a hexagonal structure. Snowfall can last for sustained periods of time and result in significant buildup of snow on the ground.

On the earth's surface, snow starts out light and powdery, but as it begins to melt it tends to become more granular, producing small bits of ice which have the consistency of sand. After several cycles of melting and freezing, snow can become very dense and ice-like, commonly known as snow pack.

Next Topic: Stratocumulus Clouds