There's no automation in measuring snowfall - the US National Weather Service has thousands of volunteers with rulers.
WeatherWorks, Tiny Fox Lab

There’s no automation in measuring snowfall – the US National Weather Service has thousands of volunteers with rulers.Tiny Fox Lab Facts

There are over 8,700 cooperative observers across the country who send in their weather data to the NWS daily, some who have done it for over 75 years!

Preview photo credit: WeatherWorks
Source: newsweek.com/how-mu…