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Nested circles around a typhoon centre.
Also known as: Typhoon storm area, Gale area circle Japan
Marks the storm and gale areas around a typhoon centre on a Japanese chart, with a broken circle for the forecast area.
Marks the areas of storm and gale wind around a typhoon centre.
Contexts: Public information, Maps
Draws the forecast position as a circle of possible centres rather than as a cone of possible tracks, which is the opposite convention to the United States hurricane forecast and reads quite differently: the Japanese circle grows with forecast hour and the American cone widens along a line.
Contexts: Public information, Maps
Two concentric circles around a marked centre, the inner drawn as a solid stroke and the outer as a broken one, with a wider dashed circle set ahead of them.