Forecast Details for Alton, NH

Recent Locations: Alton, NH  
Overnight: Showers likely, mainly before 3am. Mostly cloudy, with a low around 44. Southwest wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday: A slight chance of showers between 11am and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 68. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
Sunday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 51. Southwest wind 5 to 10 mph becoming northwest after midnight. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday: Mostly sunny, with a high near 70. Northwest wind around 10 mph.
Monday Night: Partly cloudy, with a low around 44. North wind around 5 mph becoming east after midnight.
Tuesday: Partly sunny, with a high near 57.
Tuesday Night: A 40 percent chance of showers after 8pm. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 42.
Wednesday: Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 56.
Wednesday Night: Mostly cloudy, with a low around 43.
Thursday: Mostly sunny, with a high near 68.
Thursday Night: Mostly cloudy, with a low around 47.
Friday: A 30 percent chance of showers. Partly sunny, with a high near 70.
Friday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 50.
Saturday: A 30 percent chance of showers. Mostly cloudy, with a high near 65.

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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

Weather Topic: What are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Altostratus Clouds Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds