A Severe Thunderstorm Watch is issued by the National Weather Service when conditions are favorable for severe thunderstorms to develop in a specific area. This means that while severe storms are not currently occurring, they could form and pose a threat, including strong winds, large hail, and heavy rainfall. During a watch, it is important for people to stay informed by monitoring local weather updates and being prepared to take action if a severe thunderstorm warning is issued. A warning indicates that severe weather is imminent or already occurring, requiring immediate attention and safety measures.