Which of the following are characteristics of severe thunderstorms?

Severe thunderstorms are typically characterized by significant weather phenomena that can cause damage and pose a risk to life and property. The correct choice highlights several key indicators of severe thunderstorms: winds of 50 knots or more, hail measuring 3/4 inch in diameter or greater, and the potential for tornadoes.

Winds reaching 50 knots (approximately 58 mph) are notably strong and can lead to hazardous conditions, while hail of this size is large enough to cause damage to vehicles, crops, and structures. Additionally, the occurrence of tornadoes is a critical component, as they are violent extensions of severe thunderstorms that can lead to catastrophic outcomes.

Understanding these characteristics is crucial for interpreting weather reports and warnings, as they signal when and where severe weather events may occur, enabling appropriate safety measures and preparations.