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WWA issued for tomorrow..

WINTER WEATHER ADVISORY IN EFFECT FROM 1 AM WEDNESDAY TO 1 AM
EST THURSDAY...

* WHAT...Snow expected. Total snow accumulations of 3 to 6 inches
  on the Tug Hill Plateau and higher terrain, with less than 3
  inches of accumulation across lower elevations.

* WHERE...The Eastern Lake Ontario Region.

* WHEN...From 1 AM Wednesday to 1 AM EST Thursday.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions could impact the morning or evening commute on
  Wednesday.

StormTotalSnowWeb (19).png

A strong shortwave will track across Ontario crossing the Ottawa
Valley into northern New York tonight. Expect snow to develop after
midnight as ascent increases across the region. Boundary layer winds
back to west-southwest ahead of this feature with temperatures aloft
just cold enough for lake enhancement (around -6C at 850 mb)
northeast of Lake Erie and Lake Ontario. Profiles continuing to
suggest mainly snow to start out in most areas, except perhaps right
along the immediate lakeshores. Could see lower elevations pick up
an inch, maybe two, of snow that could disrupt the early morning
commute Wednesday.

It looks like the main focus for this event will be across the higher
terrain/Tug Hill Plateau east of Lake Ontario. Better moisture
will be found across this area with a persistent westerly lake
enhanced/upslope flow developing through the day Wednesday,
before veering to northwest early Wednesday night. Most higher
resolution guidance along with WPC guidance hits this area
fairly hard with precipitation. Lower elevations probably mix
with rain which will drastically cut down on snowfall amounts,
but the higher terrain areas could reach at least 6 inches. We
therefore issue an Winter Weather Advisory to cover this threat.

Breezy west to southwest winds expected to develop late tonight into
Wednesday, especially northeast of the Lakes with wind gusts of 30-
35 mph along immediate shorelines.

Some leftover northwest flow upslope expected Wednesday night with
additional minor accumulations mainly across higher terrain areas
where upsloping will be maximized.
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