Predict the High; Predict the Snow

This was a lesson learned years ago about the synoptics of a wx map in the northeastern USA.  If a large Arctic High Pressure system ridges north across southern O Canada and new England, then overrunning precip in the winter months will often fall in the form of snow if taking the "proper" track.  Well, just one graphic in this quick update and that is from our modelers to the north who should have a fair understanding of Arctic cold!  The Canadian model keeps our entire precip event in the form of the fluffy white stuff and the closest any icing is in nearer the Mason-Dixon Line.  It is a trend that I have been monitoring today as the all of the models have been trending COLDER for this winter wx event.  Here is the 7 am map from the Canadian model for this Saturday morning...

That 1029 mb High over Quebec is supporting sub-zero temps and extremely dry air.  A strong cold air damming wedge will be funneled down east of the mountains so if any precip does changeover, it now appears that sleet and frz rain will be the predominant types and not plain rain.  Roads will improve later Saturday as the storm pulls off to the east.  The snow should start around midnight Friday and last for ~12 hrs; the heaviest falling between 5 am-9 am Saturday morning.
Enjoy your Thursday evening.....

Smitty

AA:  Looking at our 1st snow of the true winter season this Saturday morning...