[PaulHoule]

I think you're right, their goal is to set up heavy weapons like

https://en.wikipedia.org/wiki/Multiple_rocket_launcher

to bombard Kyiv. Doing so is a challenge because the only thing equal to the rate that kind of weapon can launch damaging rockets is the rate at which it has to be resupplied. Thus to make that large scale attack they have to be in control of logistics.

There are now constellations of SAR satellites that should give a pretty good picture of that convoy

https://en.wikipedia.org/wiki/Synthetic-aperture_radar

Ukraine has asked for access to this data, I sure hope they are getting it. If they are it doesn't matter if there are clouds or not.