With the strengthening sunlight the roof snow is melting but when it extends out into the air where the temp is below freezing it often re-freezes. This image captures just such an event; notice the icicle extending downward at a 45 degree angle from the curved slippage of snow.
Alaskan at Last! 
Ah the joy of spring..melting snow…muddy roads…mosquitoes….bears and the rumble of massive amounts of snow sliding off the roof.
Hey Pete – Yep, they’re all in the not so distant future with the exception of the latter; just yesterday while out with the dogs I looked over the roof carefully and there’s only a small ‘edge’ of ice hanging from the eves. If we see many more 45 F plus days it’ll either melt away or just slip off but if the latter its not enough to make any noise. Back a couple weeks I was hearing those massive ‘thumps’ when a large piece of ice and snow let go and impacted the earth. Given how terribly wet September and October were last fall (192% and 291% of normal monthly rainfall respectively!) I cannot imagine break up being much worse in terms of mud and standing water. The bears and the mosquitoes have yet to make an appearance although I did hear some snow machiners found bear tracks in the snow a bit to the east of here…