The simple reality is that houses have to consider the liability situation that exists if they DON'T give the league a pass when unusual weather hits areas not accustomed to it.  One lawsuit from an accident or fatality could bankrupt the center even if the case was ultimately dismissed.

Remember that many leagues have members who may be driving an hour or more to get there...and not all of the 'locals' would be on the roads that ARE plowed or sanded.  It is the same sort of reason the State effectively shuts down if we have the slightest bit of sleet here in Texas.