Shortwave sliding through on Wednesday ahead of stronger warm air
advection late this week will bring rain and snow to region. Temps
over higher terrain of eastern Lake Ontario region including Tug
Hill and western Dacks should stay cold enough for lake enhanced
snow. Some accumulation could occur Wednesday into Wednesday night.
ECMWF quite bullish with qpf/snow and seems on higher end of
guidance for both. H85 temps of -4c to -6c marginal for all snow and
suggest we`ll be looking at situation that is highly dependent
on elevation. Will keep this out of HWO for now given most
guidance is not as bullish with qpf/snow as ECMWF and since
ECMWF showed sharp increase over its previous runs.
Beyond this into late this week, upper ridging and warming will
provide a warm up with temps rising well above normal Thu into Sat.
Deepening long wave trough over central CONUS will then result in
cyclogenesis by next weekend with deepening low potentially less
than 990mb lifting across the western Great Lakes. At least at this
point, primary models are in good agreement with the idea, though
NBM temp output shows decent spread Friday and Saturday. Seems we`ll
be on the warm side of the system Friday/Saturday (highs potentially
as warm as the 50s one or both of these days) with rain first part
of the weekend and possibly some gusty winds and increasing lake
effect snow chances arriving by late next weekend as colder air
arrives from the west. Plenty of time to dive into those details as
we work through the upcoming week