Just by enabling the cloud layer by going to the layers panel (see in 3rd image of the post) and now zoom it to the location where it’s raining or snowing. Currently Google Earth displays some area in North America and Europe. And to see where actually the rain and snow new feature displays, just enable the radar layer by going to the layers panel (see in 3rd image of the post).
Now you can see Clearly Clouds condition of google earth...
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