Good afd from IWX
SHORT TERM...(Today and Tonight)
Issued at 455 AM EST Fri Dec 23 2022
The upper level low`s main vort max lobe moves away from the area
into this morning taking the main surface low pressure system into
southern Canada. Additionally, trajectories become more westerly
allowing for a transition into lake effect snow being the main snow
event. With it being so cold, the DGZ is basically into the ground
with lake enhanced omega residing above the DGZ. This factor of the
cross-hair method being slightly off as well as the strong winds
being able to rip apart the snow flakes should help provide a
ceiling to our lake effect snow amounts. Additional snowfall amounts
will be the greatest downstream of the lake reaching 8 to 12
additional inches of snow there from now through Saturday night.
Thereafter, the lake effect snowfall looks to be the main snowfall
event through at least much of Sunday. The snow paired with the
strong winds will help to lower visibility and so will hold onto the
blizzard warning for our lake effect area. One thing to watch for
today will be that additional counties could be added on the eastern
edge of the blizzard warning.
Another hazard today will be the strong gusty winds. Wind gusts will
likely be able to surpass 50 mph at their peak and that combined
with the powdery natured snow will allow for blowing and drifting of
snow as well as lowered visibility. This will impact the N-S roads
the most with drifting snow, but travel across all roads will need
to use caution where visibility does become lowered.
Temperatures this morning have dropped below zero away from the lake
influence. With the very strong winds expected to reach between 40
and 50 mph today, wind chills will be able to reach into the upper
20s and low 30s below zero. This is wind chill warning criteria.