I totally wanted one! But at that time (and I believe still as of writing this) they are not publicly available (you need to be in a select group of testers). They had created Raspberry Pi Weather Stations for Schools. These clouds combine in a dense gray overcast that promises light to heavy rain.Back in late February I saw this post on the Raspberry Pi site. Their soggy bases may be just above the earth's surface and be indistinguishable from heavy fog. Heavy, rain-laden, low-lying, dark gray blankets that come with warm fronts and wet nor'easters. Winds are strong around these threatening clouds. As the updraft hits, cold air is condensed as a cloud. This shape is due to violent updrafts through a wide range of temperatures. If broader above than below, it's called an anvil head. Cumulonimbusĭark, tightly-packed balls that may churn and tower as thunderheads at about 6,000 feet. Seen over land during the day indicates thermals and promises good sea breezes. They may, however, darken and be transformed into stratocumulus or cumulonimbus clouds, which can signal bad weather. Puffy white cotton balls at about 6,000 feet promise fair weather. Large, dark, puffy balls occurring in compressed layers and foretell bad weather. If the wind is steady between northeast and south, these clouds promise rain soon. These have grayish-white rolls that look like cirrocumulus but are darker and sometimes appear in layers. Thicker, darker and more claustrophobic than the higher cirrostratus clouds, they promise rain soon. Sheets of cloud between 6,000 and 23,000 feet. The saying "mackerel sky mackerel sky, not long wet, not long dry" describes them and the changeable weather that follows. From below, these clouds may look like fish scales. Have barely-defined puffy balls and, like cirrostratus, lie at altitudes of 16,500 to 40,000 feet, usually in large clumps. May drape the entire sky in a gray haze and cause a halo around the sun or moon - an indication of a nearing storm. Wispy clouds lying in sheets may form a ceiling slightly lower than cirrus clouds as a warm front nears and layers of cold air mix with upper warm air.
Wispy and lying at oblique angles, these clouds may herald the approach of a warm front. Composed of ice crystals, cirrus clouds lie at altitudes of about 45,000 feet. The highest and least-substantial clouds. If cloud color, shape, and size change, so will the weather.Īs puffy cumulus clouds darken, enlarge, and become dark cumulonimbus clouds, expect squalls within two hours. The sharper the edge of a thundercloud and the darker its color, the more violence it may contain. Isolated, wispy, or very high clouds are an indication of fair weather.Ĭrowded, dense, dark, and towering clouds indicate changing or worsening weather. Here are some hints for predicting weather by reading clouds. Reliable indicators are the changing shape and color of the clouds, which are created by the same natural phenomena that cause the weather itself: temperature and humidity. NOAA and other weather forecasts are very important, and so is a barometer, but you can also get a reliable gauge on your local weather if you think of the sky as something like the face of an emotional person whose moods are shown right on his or her face.
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