What should pilots do in response to unexpected weather changes during the flight?

Pilots should reassess their flight plan and execute alternative strategies in response to unexpected weather changes during a flight because safety is their primary concern. Utilizing weather information to assess current conditions allows pilots to make informed decisions about their route, altitude, and overall approach. This proactive approach can involve altering the flight path to avoid hazardous weather, climbing or descending to find better conditions, or even diverting to an alternative airport if necessary.

Continuing the flight as planned regardless of conditions ignores the potential dangers presented by unexpected weather. Simply notifying air traffic control without altering the flight plan does not take sufficient measures to ensure safety in changing conditions. Landing immediately at the nearest airport might not always be practical or possible, and it might lead to unnecessary risks if the flight can be safely navigated through changing conditions with proper assessment and planning.