Quote Originally Posted by shadewalker View Post
But

/stopmacro [channeling]
/use 13
/use 14
/use Presence of Mind
/use Icy Veins
/use Arcane Power
/castsequence Arcane Blast, Arcane Blast, Arcane Blast, Arcane Missiles

would have the added benefit of keeping your trinkets and other spells from breaking the channel too.
...

This might explain why I occasionally lose my blizzard channel. I'm gonna have to go check my macros!