Weather Impact Levels

FAA classifications indicating how weather conditions are affecting airport operations.

What is Weather Impact Levels?

Weather impact levels are FAA classifications that indicate how current or forecasted weather conditions are affecting airport operations. These levels help travelers and airlines understand the severity of weather-related disruptions. Impact levels range from none (normal operations) through low, moderate, to high (severe disruptions). Weather impacts can affect visibility, runway conditions, wind speeds, and overall airport capacity.

Common Causes

Thunderstorms and lightning
Low visibility (fog, snow, rain)
High winds or wind shear
Snow and ice accumulation
Extreme temperatures

Impact & Duration

Impact Level

Varies from minimal delays (low) to significant disruptions (high)

Typical Duration

Varies based on weather patterns - hours to days

Frequently Asked Questions

What do weather impact levels mean for my flight?

Low impact means minor delays are possible. Moderate impact suggests expect delays of 30-60 minutes. High impact indicates significant delays, cancellations, or ground stops are likely.

Why does weather far from the airport affect operations?

Aircraft must navigate around severe weather en route, and weather systems approaching an airport can trigger preemptive traffic management. Regional weather patterns affect entire airspace sectors.

How accurate are weather impact predictions?

Weather forecasts are generally reliable for the next few hours but become less certain further out. Check updates frequently as conditions can change rapidly.