What is NOT considered a hazardous weather condition that needs reporting?

Static cloud formations are not considered a hazardous weather condition that necessitates reporting because they typically do not pose immediate risks to flight operations. While pilots and air traffic control must be aware of various weather phenomena to ensure safety, static cloud formations are generally stable, predictable, and do not produce severe weather conditions like turbulence, icing, or heavy precipitation. In contrast, severe turbulence can significantly affect aircraft performance and comfort, heavy precipitation can lead to reduced visibility and potential runway hydroplaning, and severe icing presents very real dangers related to aircraft performance and control. Thus, static cloud formations do not require the same level of concern or reporting as the other options listed.