noun
upper-level weather chart
Technical term in meteorology for a chart showing atmospheric conditions at high altitudes.
気象予報士は高層天気図を解析して、上空の気圧配置を調べる。
Weather forecasters analyze upper-level weather charts to examine pressure patterns aloft.
Surface weather chart, as opposed to upper-level.
Compound of 高層 (high altitude) + 天気図 (weather chart).