Can We Really Predict A Winter Storm (Long Range)

It is now late Monday evening. Models have been showing signs of a winter storm to affect the Southern Plains for about 3 days now. Most Ensembles have been pointing towards a trend of COLD weather, but now they are heading towards a winter storm. The latest graphic shows you total accumulation of snowfall after this upcoming possible storm this weekend. I am putting all this in writing, because if it verifies then I will have proof to my forecast. However, if it fails...Then I must go back to the drawing board.