What time frame is indicated for valid duration of a WST?

The valid duration of a Weather Significant Threat (WST) is set to 2 hours or until the next hourly update. This time frame is crucial since it allows for timely and accurate weather information to be communicated, ensuring that personnel can make informed decisions based on the most current conditions.

Weather can change rapidly, and the 2-hour window strikes a balance between providing immediate information while also allowing for time to gather the latest updates. It ensures that operators are working with the latest data available, thereby optimizing safety and operational efficiency. The provision for the next hourly update signifies the dynamic nature of weather forecasting and the necessity for constant monitoring.

In operational contexts, sticking to this timeframe helps manage the risks associated with rapidly changing weather conditions, underscoring the importance of regular updates and situational awareness in aviation and maritime operations.