What is NOT considered a warning sign of severe weather?

Clear and sunny skies are not considered a warning sign of severe weather because they typically indicate stable atmospheric conditions. In the context of weather patterns, clear skies are often associated with fair weather, making them an unreliable indicator of impending severe weather.

In contrast, dark clouds, thunder, and a sudden temperature drop are all recognized as precursors to severe weather events, such as thunderstorms or tornadoes. Dark clouds often suggest the presence of moisture and instability in the atmosphere that can lead to storm formation. Thunder signifies activity within a storm, indicating that severe weather may already be occurring or is imminent. A sudden temperature drop can indicate the arrival of a cold front, which often triggers severe weather conditions. Therefore, clear and sunny skies stand apart as a lack of forewarning for severe weather.