Closed cut valley + dimensional shingle + low pitched roof + light powdery snow = valley leak.
I assumewith the amount of sun today, some of it melted away and just sat there with no where to go and got between the shingles on the valley.
Also where the other leak is, the snow may have melted and went in behind the gutter apron. Maybe. Not sure without really looking.
My real question is why did you get light powder like snow and I got stuff so heavy I couldnt even lift it.