The forecast is for heavy snowfall in the Peak District and South Pennines tonight (Monday) and into Tuesday morning, notably in the Calder Valley.
Northern and Trans Pennine trains are expecting disruption. If the trains are disrupted then the roads, especially the M62 and roads like the Snake Pass may well be as well. This may well not settle for long so could just be a short term disruption.
But a precautionary note for anyone travelling in the area.
And this is heavy snow by early winter UK standards, not by Pacific North West standards (where I am aware of the current forecast over the passes).