Forecast Details for Merrimack, NH

Recent Locations: Merrimack, NH  
This Afternoon: Scattered showers. Cloudy, with a high near 49. East wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tonight: Scattered showers, mainly before 10pm. Mostly cloudy, with a low around 39. East wind around 5 mph becoming calm. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday: Partly sunny, with a high near 58. Light east wind becoming southeast 5 to 10 mph in the morning.
Friday Night: A chance of showers between 11pm and 5am. Mostly cloudy, with a low around 45. South wind 5 to 10 mph. Chance of precipitation is 30%.
Saturday: Mostly cloudy, with a high near 64. West wind 5 to 10 mph, with gusts as high as 25 mph.
Saturday Night: Partly cloudy, with a low around 39.
Sunday: Mostly sunny, with a high near 59.
Sunday Night: Partly cloudy, with a low around 37.
Monday: Sunny, with a high near 62.
Monday Night: Mostly clear, with a low around 37.
Tuesday: Mostly sunny, with a high near 63.
Tuesday Night: A 30 percent chance of showers. Partly cloudy, with a low around 42.
Wednesday: A 40 percent chance of showers. Mostly cloudy, with a high near 59.

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Current U.S. National Radar--Current

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Current U.S. National Radar

National Weather Forecast--Current

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Today's National Weather Map

National Weather Forecast for Tomorrow

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Tomorrows National Weather Map

North America Water Vapor (Moisture)

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North American Water Vapor Map

Weather Topic: What are Hole Punch Clouds?

Home - Education - Cloud Types - Hole Punch Clouds

Hole Punch Clouds Next Topic: Mammatus Clouds

A hole punch cloud is an unusual occurrence when a disk-shaped hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.

When part of the cloud forms ice crystals, water droplets in the surrounding area of the cloud evaporate. The effect of this process produces a large elliptical gap in the cloud. The hole punch cloud formation is rare, but it is not specific to any geographic area.

Other names which have been used to describe this phenomena include fallstreak hole, skypunch, and cloud hole.

Next Topic: Mammatus Clouds

Weather Topic: What are Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation