Met Office Warning Colours: Yellow, Amber, Red Explained | RainViewer Blog

TL;DR: A Met Office colour is not a straight severity ladder. It is the output of a likelihood-by-impact matrix. Every warning answers two questions: how likely the event is, and how severe the impact would be Two yellow warnings can describe very different situations for that reason Yellow means be aware, amber means be prepared, red means a genuine risk to life The same snowfall can warrant different colours in regions with different readiness Warnings are issued per region, so a red in one area and none next door is the system working A Met Office weather warning colour isn’t a simple sever