High clouds

High clouds are Cirrus, Cirrostratus and Cirrocumulus.
Cirrus clouds are thin wispy clouds, composed predominantly of ice crystals. Thick patches of Cirrus clouds indicate that showers are nearby. Cirrus clouds that are shaped like commas indicate that a warm weather front is coming. Cirrostratus clouds are transparent and show little or no structure. When Cirrostratus clouds are increasing and are in a continuous sheet, a warm or occluded weather front will approach, bringing rainy, stormy conditions. You can expect good weather at your location when Cirrostratus clouds are not increasing. Cirrocumulus are white and grainy with no shadowing clouds. Depending on the location, these clouds can foretell bad or good weather. In the British Isles they usually indicate good weather, but in Southern Europe they can indicate bad weather.