Forecast Details for Waltham, MA

Recent Locations: Bardwell, KY Mammoth Lakes, CA Waltham, MA

Today: Sunny, with a high near 78. West wind 6 to 13 mph.

Tonight: Mostly clear, with a low around 53. West wind 3 to 7 mph.

Wednesday: Mostly sunny, with a high near 77. West wind 5 to 7 mph.

Wednesday Night: Mostly cloudy, then gradually becoming clear, with a low around 51. Light west wind.

Thursday: Mostly sunny, with a high near 78. Southwest wind 3 to 7 mph.

Thursday Night: Partly cloudy, with a low around 60. South wind around 7 mph.

Friday: A chance of showers before 2pm, then a chance of showers and thunderstorms between 2pm and 3pm, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 77. Southwest wind 6 to 9 mph. Chance of precipitation is 60%.

Friday Night: Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 8pm, then a chance of showers after 8pm. Mostly cloudy, with a low around 54. Southwest wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 60%.

Saturday: Mostly sunny, with a high near 73. Northwest wind 5 to 7 mph.

Saturday Night: Mostly clear, with a low around 53. Light west wind.

Sunday: Mostly sunny, with a high near 77. Northwest wind around 6 mph.

Sunday Night: Partly cloudy, with a low around 55. Light and variable wind.

Labor Day: Mostly sunny, with a high near 76. Light and variable wind becoming northeast 5 to 7 mph in the morning.

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

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).

National Weather Forecast--Current

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

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 Stratocumulus Clouds?

Home - Education - Cloud Types - Stratocumulus Clouds

Next Topic: Stratus Clouds

Stratocumulus clouds are similar to altocumulus clouds in their fluffy appearance, but have a slightly darker shade due to their additional mass.

A good way to distinguish the two cloud types is to hold your hand out and measure the size of an individual cloud; if it is the size of your thumb it is generally an altocumulus cloud, if it is the size of your hand it is generally a stratocumulus cloud.

It is uncommon for stratocumulus clouds to produce precipitation, but if they do it is usually a light rain or snow.

Next Topic: Stratus Clouds

Weather Topic: What are Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

Wall Clouds Next Topic: Altocumulus Clouds

A wall cloud forms underneath the base of a cumulonimbus cloud, and can be a hotbed for deadly tornadoes.

Wall clouds are formed by air flowing into the cumulonimbus clouds, which can result in the wall cloud descending from the base of the cumulonimbus cloud, or rising fractus clouds which join to the base of the storm cloud as the wall cloud takes shape.

Wall clouds can be very large, and in the Northern Hemisphere they generally form at the southern edge of cumulonimbus clouds.

Next Topic: Altocumulus Clouds