花前線
Meanings
1
flower front; cherry blossom front
A line on a map showing the advance of flowering, especially cherry blossoms, across a region. Often used in weather forecasts and seasonal reports. Compare 開花前線 (same meaning).
See also: 開花前線
This year's cherry blossom front is moving north earlier than usual.
I saw a forecast map of the flower front on the weather report.