Storm Reflectivity at 7:45 AM Dec 27, 2011. Precipitation typed - pink - projected freezing rain, broad area of blue around Ft Wayne Ind.(lower left) - projected snow. "snowflakes/raindrops" - METAR( airports) reporting stations, as to type of precip. EWR image (c) EWR 2011

Special weather statement
Updated by Environment Canada
At 4:42 AM EST Tuesday 27 December 2011.
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Special weather statement for:
City of Toronto
Windsor – Essex – Chatham-Kent
Sarnia – Lambton
Elgin
London – Middlesex
Simcoe – Delhi – Norfolk
Dunnville – Caledonia – Haldimand
Oxford – Brant
Niagara
City of Hamilton
Halton – Peel
York – Durham
Huron – Perth
Waterloo – Wellington
Dufferin – Innisfil
Grey – Bruce
Barrie – Orillia – Midland
Belleville – Quinte – Northumberland
Kingston – Prince Edward
Peterborough – Kawartha Lakes
Stirling – Tweed – South Frontenac
Bancroft – Bon Echo Park
Smiths Falls – Lanark – Sharbot Lake
Parry Sound – Muskoka
Haliburton
Renfrew – Pembroke – Barry’s Bay
Algonquin
Burk’s Falls – Bayfield Inlet.

Mixed precipitation today, significant snowfall and a possible flash
freeze tonight.

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A winter storm warning with snow >15cm is in effect for these regions:

Brockville – Leeds and Grenville
City of Ottawa
Gatineau
Prescott and Russell
Cornwall – Morrisburg.

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==discussion==
A developing low over Kentucky will track northeast along
The Appalachians today spreading a large area of precipitation into
Southern Ontario in the morning and into Eastern Ontario in the
afternoon. The precipitation will be a mix of rain and wet snow with
temperatures in most localities remaining above zero. The majority
Of the precipitation will fall as rain for communities along the
shores of Lake Erie and Lake Ontario where little if any
Accumulation is expected. For the remaining regions, a sloppy
accumulation of 2 to 4 cm is likely with slightly higher amounts
possible over the higher terrain of the Dundalk Highlands, Niagara
Escarpment and Oak Ridges moraine.

This low will rapidly intensify tonight bringing a threat of a
Heavy snowfall to Extreme Eastern Ontario. A snowfall warning has
been issued for these regions and includes Ottawa, Cornwall and
Brockville. For regions just west of this watch area and east of a
line from Cobourg to Algonquin Park, an additional 5 to 10 cm of snow
is possible tonight.

Another concern with this system is an Arctic cold front that will
cross southern and Eastern Ontario tonight. Much colder air
Behind the front means that temperatures will drop sharply from near
zero to well below freezing in a matter of hours. At the same time
all of the falling precipitation or residual moisture may quickly
freeze on untreated surfaces like roads and sidewalks making for
hazardous travelling conditions.

Please monitor the latest forecasts and warnings from Environment
Canada at WWW.WEATHEROFFICE.GC.CA

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