Definition
A weather depiction chart is a graphical product, derived from surface aviation observations (METARs), that summarizes ceiling height, visibility, and general weather conditions across a region using standard station symbols and shaded areas to highlight where conditions are IFR, marginal VFR, or VFR.
Plain English
A map that shows, at a glance, where the weather is good for flying, marginal, or below visual flight rules limits, based on cloud height, visibility, and current conditions at reporting stations.
Context Anchor
Seen during preflight weather planning, especially when reviewing broad weather conditions before looking at more detailed local reports and forecasts.
Derivation
"Depiction" comes from the Latin depictio, meaning "a representation by drawing." The chart "depicts" the weather picture across the country in one drawing rather than forcing the pilot to read dozens of individual station reports.
Why Pilots Care
Pilots consult these charts to quickly decide whether a route is safe for VFR flight or requires an IFR plan and alternate airport.
Intuition Check
Do not read “weather depiction” as a complete weather forecast. It is mainly a visual summary of reported conditions at the time of the observations, not a promise of what the weather will do later.
Example Sentence 1
Before her cross-country, she checked the weather depiction chart and saw a large shaded IFR area covering her destination.
Example Sentence 2
The weather depiction chart highlighted an area of IFR conditions over the mountains, prompting the pilot to file an alternate route.