Advisory Analysis
Compare turbulence advisories against actual pilot reports to assess forecast accuracy. Learn more
About advisory analysis
Advisory analysis answers a question most weather tools ignore: how often do forecast hazards actually show up? Flight Chop cross-references each active advisory with the pilot reports filed nearby and scores how well the forecast matched reality.
Use the source filters to focus on G-AIRMETs, SIGMETs, or CWAs, sort by validation score, and open any advisory to see the supporting reports and an accuracy breakdown over time. It is a transparent look at the strengths and the built-in caution of aviation weather forecasting.
Frequently asked questions
What does advisory analysis measure?
It compares forecast hazard advisories — G-AIRMETs, SIGMETs, and Center Weather Advisories — against the pilot reports filed in the same area and time window. When pilots actually reported the forecast condition, the advisory is scored as validated; when they did not, it is a clue the forecast may have been conservative.
Why do advisories not always match reports?
Aviation advisories are intentionally cautious: they cover broad areas and time spans to keep flights safe, so it is normal for conditions to be milder than forecast in much of the advisory zone. A low validation rate is not an error — it reflects the safety margin built into aviation weather.
Who is this tool for?
It is built for weather enthusiasts, students, and curious flyers who want to understand how forecast hazards compare with what pilots actually experience. It is an educational tool, not an operational weather product.