Forecast Details for Nantucket, MA

Recent Locations: Burtonsville, MD   Verona Beach, NY   Nantucket, MA  
Tonight: A chance of rain. Areas of dense fog. Otherwise, cloudy, with a low around 49. Northeast wind around 14 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Sunday: A chance of rain, mainly before 9am. Patchy dense fog before 10am. Otherwise, cloudy, with a high near 55. Northeast wind 15 to 17 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night: A slight chance of rain between 10pm and 2am. Patchy fog. Otherwise, cloudy, with a low around 48. Northeast wind 11 to 15 mph. Chance of precipitation is 20%.
Monday: Patchy fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 57. Northeast wind 11 to 13 mph.
Monday Night: Partly cloudy, with a low around 47. East wind around 6 mph becoming south after midnight.
Tuesday: Mostly sunny, with a high near 59. Southwest wind 6 to 10 mph.
Tuesday Night: Partly cloudy, with a low around 49. Southwest wind around 9 mph.
Wednesday: Mostly sunny, with a high near 61. Southwest wind 10 to 14 mph.
Wednesday Night: Partly cloudy, with a low around 52. Southwest wind around 10 mph.
Thursday: Partly sunny, with a high near 62. Southwest wind 11 to 15 mph.
Thursday Night: Mostly cloudy, with a low around 53. Southwest wind around 11 mph.
Friday: Mostly sunny, with a high near 64. Southwest wind around 11 mph.
Friday Night: Partly cloudy, with a low around 52. Southwest wind 7 to 9 mph.
Saturday: Partly sunny, with a high near 62. Southwest wind 8 to 10 mph.

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Current U.S. National Radar--Current

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Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds

Weather Topic: What is Sleet?

Home - Education - Precipitation - Sleet

Sleet Next Topic: Snow

Sleet is a form of precipitation in which small ice pellets are the primary components. These ice pellets are smaller and more translucent than hailstones, and harder than graupel. Sleet is caused by specific atmospheric conditions and therefore typically doesn't last for extended periods of time.

The condition which leads to sleet formation requires a warmer body of air to be wedged in between two sub-freezing bodies of air. When snow falls through a warmer layer of air it melts, and as it falls through the next sub-freezing body of air it freezes again, forming ice pellets known as sleet. In some cases, water droplets don't have time to freeze before reaching the surface and the result is freezing rain.

Next Topic: Snow