Synoptic Weather Map

The synoptic weather map is the working drawing of early-20th-century forecasting: thin black isobars closing into pressure curves, blue cold fronts and red warm fronts marching across coastlines, and H/L marks pinning the pressure systems. Born in the Bergen School of Vilhelm and Jacob Bjerknes, it turned the sky into a readable diagram.

This design system rebuilds that printed-chart character — cool chart-white stock, cold-front blue as the signature accent, letterpress grain, and a strict line-drawn grammar of triangles, semicircles, and isobars.

天气综观图是二十世纪初预报工作的"工作底图"：纤细的黑色等压线闭合成压力曲线，蓝色冷锋与红色暖锋掠过海岸线，H/L 标记钉住高低压系统。它诞生于威廉与雅各布·皮叶克尼斯父子的卑尔根学派，把天空变成可读的图解。

本设计系统重建这种印刷海图的气质——冷调海图白纸张、作为标志性强调色的冷锋蓝、凸版印刷的颗粒质感，以及由三角形、半圆与等压线构成的严谨线描语法。