this is an online survey, and you know i don't like those. but, i don't find anything about this very surprising.
i would expect the number of ndp supporters to increase as the number of undecided voters goes down. but, their best hope remains a minority, because they're never going to win in the rural heartland of dumbfuck, alberta, and they have to make up a lot more ground in calgary than they probably can.
but, don't be shocked when it's not the blow out that the media is telling you it's going to be. all evidence leans towards a heavy polling bias on the right.
http://angusreid.org/alberta-election-april-2019/