Here’s a fun little graphic courtesy of the Penn State E-wall The chart below is the total liquid-equivalent precipitation for the upcoming weekend from all of the different short-range ensemble forecast models that were run at 15z (10 am, EST). Each panel represents a different model run, and the color scale – given on the lower right-hand side – is hundredths of inches. We use these to establish 1) what the envelope of uncertainty is; 2) how much agreement there is amongst the models; and 3) which direction the guidance is leaning. Well, this latest set of model data has everything from a blizzard… to nothing. That should help straighten this out!