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Unstructured patches of low cloud within a stable stratified troposphere.

Development of thermally driven circulation between sea and land, often resulting in organized convective cloudiness in the vicinity of coastlines.

Rapid Cyclogenesis describes a very fast and intensive development of an Occlusion cloud spiral from a low level cloud head. Upper air processes are driving…

Polar Lows look very similar to Commas but usually occur in northern latitudes. They develop under more specific synoptic conditions when compared to the…

A WCB Occlusion is accompanied by a distinct cloud spiral; clouds of all three frontal parts CF, WF and WCB Occlusion are multilayered.

Mid-level cloud streets and/or high level cloud sheets extending from the mountain ridges to the lee side. They develop when the wind stream is almost…

Upper Waves are cloud bulges at the rear edge of Cold Front cloud bands. They are associated with upper level processes and do not develop.

Development of thicker and mostly more convective cloud within a frontal cloud band in the left exit region of a jet streak during frontal crossing.