Currently it says 'WEST" with some shift southwest. Perhaps that might be a trigger
enough to get those backed up birds moving after dreadful north winds ...
I remembered years ago,when north winds held for two weeks,then a little shift west created a fallout. now,I am not saying that will happen tomorrow ( I likely will be wrong since I am not a professional bird prognosticator). But,only one way to find out... feet move...
:-) enjoy the next few days hopefully spring sprung....