Windowsill leaking?

Anyone know what gives? Recently bought house last summer, so first winter. Lots of snow and cold weather, warm day few days now leaking windows. Roof hardly has any snow, mostly similar to other houses.

https://ibb.co/rJrhrjP https://ibb.co/PsGtKryD https://ibb.co/XxjzZmtt

Thanks for any advice!