I want to mention to you nonweather geeks who do not eat and sleep computer models that we might get a major Arctic blast right after the holiday weekend. This would be very cold and of long duration. This past week’s chill was only a tease.Before you hear widespread rumors of cold and snow heading our way from the TV and media meteorologists, I wanted to give you a heads-up before the rush to tire stores, TV crews setting up on overpasses and food totally disappears from grocery shelves.I did not mention this in Sunday’s column for conservative reasons although some long-range models have been quietly hinting for a while now. Thanksgiving holiday looks mostly dry with seasonal temperatures depending on wind and cloud cover. The changes begin over the weekend with moisture heading our way prior to any cold air.As I mention often in the weather realm, nothing is certain this far out but forecast models are being consistent in a major change with plenty of cold air not that far away to our north. It always pays to be prepared.Bottom line: periods of clouds as weak weather systems try to infiltrate the region, but little moisture before the weekend. An increased probability of a cold wave next week accompanied by some snowfall. Beyond that thinking, it will be a day-to-day realm of confidence as we get closer to the event.Be safe on your Thanksgiving journeys — we will chat on Thursday morning as the turkey goes into the oven.