Why Weather Briefings Are About Trends, Not Conditions

Many pilots focus on current weather conditions while planning a flight.

The problem is that weather is constantly changing.

A METAR only tells you what conditions were at a specific airport at a specific moment in time.

A good weather briefing focuses on trends.

Questions pilots should ask include:

• Are ceilings rising or falling?

• Is visibility improving or deteriorating?

• Is the pressure system strengthening or weakening?

• Is convective activity building?

• Are winds increasing throughout the day?

Understanding trends provides insight into where conditions are likely heading.

For example, 3,000-foot ceilings may be perfectly acceptable right now.

But if those ceilings have dropped steadily from 8,000 feet over the past several hours, the trend becomes much more important than the current observation.

Many weather-related accidents occur because pilots focus on what conditions are rather than what they are becoming.

The safest pilots think ahead.

Weather should always be viewed as a moving picture rather than a snapshot.