v1.18.0 — the dashed marker explains itself

The faint dashed line on the compass was unlabelled, which is why it had to be asked about. It is the average wind direction over the last 10 minutes, drawn with the same downwind convention as the solid needle.

• The wind card's row is now "10-min avg" rather than "Avg dir", so the window is visible without hovering.
• The matching entry in the metric catalogue reads "Avg direction (10 min)".
• Both compass markers carry a tooltip: the dashed one names the 10-minute average, the solid one says it is the current direction. That covers the weather card's inline compass too, where there is no row to explain it and the marker is barely twenty pixels long.

When the wind is steady the two markers overlap; when it is shifting they splay apart, and the angle between them is a rough read on how variable it is.