A lobe of atmospheric energy in the mid-levels of the atmosphere is passing through the Finger Lakes currently. Just behind this energy, a brief period of lake effect snow will develop with locally heavy bands.
The snow bands will be constantly on the move and will weaken after a few hours, preventing large accumulations. The snow will be very fluffy, which will make it accumulate quickly and be prone to blowing and drifting.
WINTER WEATHER ADVISORIES are in effect for the following counties (listed alphabetically): Cayuga (North and South), Monroe, Onondaga, Seneca, and Yates
Snow bands should begin to develop over the northeastern Finger Lakes after 8 PM. Initially, the snow will be across northern Cayuga and central Onondaga counties, including Syracuse.
The band will then slowly sag southward, ending up just north of a Rochester-Ithaca line around midnight.
The band will dissipate thereafter and be replaced by a spray of light snow showers over the same areas. This snow will linger into Wednesday morning and even the early afternoon before lifting north and dissipating.
Localized amounts over 4 inches will be possible from northeastern Wayne County into southern Onondaga county, just south of Syracuse.
Lighter amounts will be found south of this primary axis of snow, with little to no snow south of the Rochester-Ithaca line.
Temperatures in the areas impacted by the lake effect snow will settle in the low 20s. Outside of the snow, skies will be mostly clear and will drop well into the teens this evening.
Within the narrow band of snow, travel will be difficult with rapid accumulations of fluffy snow, blowing snow, and very low visibilities.
Once the band departs, roads will remain snowy until treated.
Outside of the lake effect, no travel impacts are expected.
Road conditions Wednesday morning may still be slightly snowy, but most main thoroughfares should be clear.
Winds will gust over 20 mph at times. Snow that falls will be prone to blowing and drifting. Wind chills will drop into the single digits in areas outside of the lake effect snow.
HIGH- Confidence is high that this event will behave as outlined here. Individual locations may see small variations in actual accumulations.
FUTURE SNOW OUTLOOK
No precipitation, rain or snow, is expected once the lake effect departs Wednesday until Friday night, when some very light snow may be possible.
- Regular Wednesday AM Blog Post- (Between 7-8 AM)
- Get the forecast for your Zip Code
- Finger Lakes Weather Radar
- Ask Meteorologist Drew Montreuil a question
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