Forecast Details for Somerville, MA

Recent Locations: Spraggs, PA Mabelvale, AR Somerville, MA

Today: Mostly sunny, with a high near 47. South wind 6 to 10 mph, with gusts as high as 23 mph.

Tonight: Patchy fog between midnight and 3am. Otherwise, mostly cloudy, with a low around 25. Light and variable wind becoming northwest 5 to 7 mph after midnight.

Sunday: Snow likely, mainly after noon. Mostly cloudy, with a high near 35. North wind 6 to 8 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

Sunday Night: A chance of snow, mainly before 9pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 10. Wind chill values as low as zero. Northwest wind 7 to 9 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

Monday: Sunny, with a high near 26. Northwest wind around 7 mph.

Monday Night: Mostly clear, with a low around 11. Light southwest wind.

Tuesday: A chance of snow between 1pm and 2pm, then a chance of rain after 2pm. Partly sunny, with a high near 41. South wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.

Tuesday Night: Rain likely, possibly mixed with snow before 9pm, then rain. Low around 34. South wind around 8 mph. Chance of precipitation is 90%.

Wednesday: Rain likely, mainly before 7am. Mostly sunny, with a high near 46. West wind 5 to 7 mph becoming north in the afternoon. Chance of precipitation is 60%.

Wednesday Night: Partly cloudy, with a low around 31. Light southwest wind.

Thursday: A chance of rain. Mostly cloudy, with a high near 48. South wind 3 to 8 mph. Chance of precipitation is 40%.

Thursday Night: A chance of rain. Cloudy, with a low around 39. South wind around 7 mph becoming east after midnight. Chance of precipitation is 50%.

Friday: A chance of rain. Mostly cloudy, with a high near 47. North wind 7 to 9 mph. Chance of precipitation is 40%.

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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

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North America Water Vapor (Moisture)

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Weather Topic: What are Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds

Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain