A scud missile is a very crude weapon. It has (almost) no strike capabilites. You can bet that once "someone" starts using that weaponry, "they" have run out of all other options.
It was the same with Saddam in the '90s. He didnt fire them towards Tel Aviv until he was almost unable to do so.
I guess....that once the scuds are fired, someone is about to lose grip of their situation.