I'm of the opinion it's better to underlay what is being shown. Then and shock horror charts come into the reliable even then be cautious and underplay them. Then you don't get so gutted when it all. Goes Ts Up
The gfs however maintains high pressure control. Not amplifying enough just enough to irritate and propogate the cold for elsewhere, as per usual. Signs very late on of cold. We all now by now not to take notice......