Definition
A weather chart that shows the state of the atmosphere over a large geographic area at a single moment in time. It uses standardized symbols to depict pressure systems, fronts, isobars, and other weather features observed simultaneously at many reporting stations.
Plain English
A wide-area weather map that captures what the weather looked like everywhere at the same moment. It gives you the big picture: where the highs, lows, and fronts are and how they're laid out across the region.
Context Anchor
Seen during preflight weather planning, especially when a pilot wants to understand the larger weather pattern affecting a route.
Derivation
From the Greek 'synoptikos,' meaning 'seen together.' A synoptic chart literally lets you see weather across a wide area together, all at the same time.
Why Pilots Care
Allows pilots to anticipate how weather systems will move and affect their flight path, improving safety and route decisions.
Analogy
It is like zooming out on a map. A single airport weather report tells you what is happening at one spot; a synoptic chart helps you see the larger pattern around that spot.
Grounding Statement
Before a cross-country flight, a synoptic chart can show whether your route sits in a broad area of calm weather or near a moving weather boundary.
Intuition Check
Do not treat a synoptic chart as a navigation chart. It is not mainly for steering the airplane; it is for understanding the larger weather picture.
Example Sentence 1
Before the cross-country flight, she studied the synoptic chart to see where the cold front was positioned relative to her route.
Example Sentence 2
Updated synoptic charts showed the high-pressure system strengthening overnight.