8 Dec 2016 – minus 40 C (-40 F) range by Friday morning. Far colder in some areas
Extreme Cold Warning for more than 50 locations (See link below)
With overnight low temperatures in the minus thirties (Celsius) and light easterly winds, wind chill values are expected to reach the minus 40 C (-40 F) range by Friday morning. Wind chill values will abate late Friday morning when temperatures begin to rise.
http://weather.gc.ca/warnings/report_e.html?ab1#224316131542852133201612080501ww1575cwwg(also ab4, ab28, ab5 and ab24 in the address link for the other affected areas)
Extreme cold warnings for the B.C. North Peace River and B.C. South Peace River regions (no temperatures given).
Extreme Cold Warning in effect for Yoho Park – Kootenay Park region. Very cold wind chills expected.
Cold Arctic air has settled over the Yoho-Kootenay Park region. The cold temperatures in combination with light winds have generated wind chills below minus 35 degree Celsius (-31 F). With no warming trend in sight, these wind chills are expected to persist at least into the end of the week.
Arctic outflow warning in effect for Central Coast – coastal sections, Central Coast – inland sections, Fraser Valley – east including Chilliwack, Howe Sound, North Coast – coastal sections, North Coast – inland sections and Whistler regions.
Northern areas: An arctic ridge of high pressure over the BC interior will continue to give strong outflow winds through the mainland inlets and valleys of the central and north coast. The strong winds combined with low temperatures will give wind chill values near minus 20 C (-4 F).
The Arctic outflow conditions will persist through Friday.
Southern areas: A strengthening arctic ridge of high pressure over the B.C. interior will continue to bring strong outflow winds over Howe Sound, Whistler and the eastern Fraser Valley tonight. The combination of strong winds and low temperatures will cause wind chill values to drop to near minus 20 degrees Celsius and persist through Friday morning.
http://weather.gc.ca/warnings/report_e.html?bc48#911081882005494413201612060502ww1171cwvr(also bc37, bc40, bc40, bc41, bc49, bc9 and bc39 in the address link for the other affected areas).
Snowfall warnings for the East Vancouver Island, Fraser Valley – east including Chilliwack, Fraser Valley – west including Abbotsford, Greater Victoria, Inland Vancouver Island, Metro Vancouver, Southern Gulf Islands, Sunshine Coast and West Vancouver Island regions, with amounts of 10 to 20 cm (3.9″ to 7.9″) to 25 cm (9.8″) at higher elevations.
http://weather.gc.ca/warnings/report_e.html?bc46#171017238850714393201612080502ww1171cwvr(also bc40, bc43, bc45, bc42, bc51, bc38 and bc44 in the address link for the other affected areas)
NEWFOUNDLAND AND LABRADOR
Snowfall warnings for the Bonavista North, Bonavista Peninsula, Clarenville and vicinity, Gander and vicinity and Terra Nova regions, with amounts to 15 cm (5.9″).
http://weather.gc.ca/warnings/report_e.html?nl3#184422089574802649201612080507ww1676cwhx(also nl15, nl1, nl20 and nl16 in the address link for the other affected areas)
Extreme Cold Warning in effect for Fort Good Hope Region and South Delta Region including Ft. McPherson – Tsiigehtchic regions
Wind chill values near minus 50 C (-58 F) will persist until late Friday morning.
http://weather.gc.ca/warnings/report_e.html?nt27#230126784542852133201612080501ww1171cwnt(also nt26 in the address link for the South Delta warning)
Blizzard warning in effect for Paulatuk and Ulukhaktok regions
Blizzard conditions with poor visibility in snow and blowing snow expected to develop overnight in Ulukhaktok and Friday morning in Paulatuk.
Blizzard conditions with westerly winds of 50 gusting to 80 km/h (31.1 to 49.7 mph) will begin in Ulukhaktok overnight. Winds will diminish late Friday afternoon and visibilities will improve.
Blizzard conditions with southerly winds of 70 gusting to 90 km/h (43.5 to 55.9 mph) will begin in Paulatuk Friday morning. Winds will diminish Friday evening and visibilities will improve.
http://weather.gc.ca/warnings/report_e.html?nt10#1108001521663408009201612080501ww1272cwnt(also nt12 in the address link for the Ulukhaktok warning)
Blizzard warning in effect for Cambridge Bay, Gjoa Haven and Kugluktuk regions
Widespread blizzard conditions with poor visibility in snow and blowing snow are expected in parts of the Kitikmeot on Friday. Blizzard conditions will begin late overnight in Cambridge Bay and Friday morning at Kugluktuk and Gjoa Haven. Visibilities in all regions will begin to improve Friday evening.
http://weather.gc.ca/warnings/report_e.html?nu7#201633945542852133201612080501ww1474cwnt(also nu8 and nu6 in the address link for the other affected areas)
Snow squall warnings (see links below for more than 50 locations)
Amounts up to 25 cm (9.8″) during the passage of a cold front.
http://weather.gc.ca/warnings/report_e.html?on18#1346085691772752683201612080503ww1171cwto(also on9, on20, on38 and on11 in the address link for the other affected areas)
http://weather.gc.ca/warnings/report_e.html?on47#195757643451902297201612080503ww1171cwto(also on20, on40, on21, on19 and on36 in the address link for the other affected areas)
http://weather.gc.ca/warnings/report_e.html?on41#2056289321772752683201612080503ww1171cwto(also on24, on38 and on43 in the address link for the other affected areas)
Snow squall warnings for the Lac-Etchemin area and Sainte-Marie-de-Beauce area regions. No amounts given.
Extreme Cold Warning in effect for Old Crow region
A prolonged period of very cold wind chills is expected.
An arctic ridge has built over the Yukon and will gradually weaken on Friday. Consequently very cold air will reside over the northern Yukon tonight and through Friday. The combination of these winds with temperatures in the low minus forties (Celsius) in low lying areas will allow wind chill values to fall below minus 50 C (-58 F) tonight. The extreme cold is expected to persist into Friday evening.
Thanks to Terry Homeniuk for these links