Andrew Dabb just tweeted. 
More below the cut
The CW's decision on #WaywardSisters came in conjunction with announcements on series it did order:
From TVLine:
From TV Guide:
Entertainment Weekly:
Various media and fab sites began to weigh in on the decision to not pick up the show.
Nerds and Beyond is starting a campaign to try and change the decision:
The cast and crew continue to react to the news.
Supernatural's writers, cast and executives have all expressed shock but support for the #Wayward movement:
Watch this space for updates.