Originally Posted by Smallaxe
That is actually known as "Sun Scald" and happens when the bark is extremely cold and a bright sun reflectes off the snow and warms one part of the bark, which expands and splits becuz of tempd differences...
Actually what you just described is known as frost cracking.
@User Name Taken
What's up with the tie, and don't you think it might be more than coincidental that this is occurring around the tie?