This is something new to me…
The Geostationary Operational Environmental Satellites (GOES) capture images every 10 minutes at 1 km resolution over America… Such imagery makes it possible to watch the quick melt of a thin snow cover over the US Great Plains during a single day.
Sub-daily monitoring of the snow cover at such spatial resolution was already possible by combining Aqua and Terra observations (overpass times of 10:30am and 1:30 pm). Here is the same example zoomed in near Ohama, Nebraska (snow cover in blue, clouds in white):
The same should be possible for Europe with MSG data (every 15 minutes, 1km & 3km resolution) or will be with MTG data (every 10 minutes or 2.5minutes, depending on scan mode + better resolutions 0.5km / 1km/2km)