@TheTKWeatherXp@tjdelsanto It's an imperfect science, as you know!
A full review, other data points, and a seasoned observer - tenured in their location - with a sound and consistent methodology: all things that give me confidence the # is more right than wrong.
@TheTKWeatherXp Unless I'm wearing a go-pro, I'm not recording video or pictures during a blizzard obs. My goal is to get the most accurate measurement possible, consistently - and to not disturb the measurement area unnecessarily. If I do that, I dont need to show anyone anything as proof.