Final answer:
When winds exceed 55 mph, the weather station should issue a Severe thunderstorm warning.
Step-by-step explanation:
When winds exceed 55 mph, the weather station should issue a Severe thunderstorm warning.
The National Weather Service issues various types of weather warnings based on the severity of the weather conditions. A Severe thunderstorm warning is issued when winds are expected to exceed 58 mph, which is close to the 55 mph threshold mentioned in the question. This warning indicates that there is a possibility of damaging winds, heavy rain, and potential lightning.
In comparison, a Tornado warning is issued when a tornado has been detected or is imminent. A Hurricane warning is issued when sustained winds of 74 mph or higher are expected in a specific area. A Flash flood warning is issued when there is a high risk of flash flooding due to heavy rainfall.