The short notice means the attendance will probably be smaller than if the game had been rearranged for a few weeks time.
The good news is that the pitch is still frozen and it is looking unlikely the game can go ahead tomorrow anyway. There has been no word from St. Mirren yet but I'd be surprised if we're trying hard to get the game on.
Watch this space for news of a postponement!
Story source: The Official St. Johnstone Website