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Friday, December 4th, 2009 - 05:52:41

SEVERE WEATHER BULLETIN ISSUED BY ENVIRONMENT CANADA
AT 5:24 AM EST FRIDAY 4 DECEMBER 2009.
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WATCHES/WARNINGS IN EFFECT FOR NORTHERN ONTARIO...

SNOW SQUALL WARNING FOR:

=NEW= MANITOULIN ISLAND.

SNOWSQUALLS WITH WHITEOUTS FROM HEAVY SNOW TODAY AND TONIGHT.

SNOW SQUALL WATCH FOR:

=NEW= WAWA - WHITE RIVER - PUKASKWA
=NEW= AGAWA - LAKE SUPERIOR PARK.

SNOWSQUALLS WITH WHITEOUTS FROM HEAVY SNOW POSSIBLE TONIGHT.

==DISCUSSION==

LAKE EFFECT SNOW BANDS OVER LAKE HURON WILL DRIFT NORTHWARD OVER EASTERN PARTS OF MANITOULIN ISLAND THIS MORNING AND CONTINUE INTO THIS EVENING. THERE IS ALSO THE POSSIBILITY OF A SECOND LAKE EFFECT SNOW BAND DEVELOPING OFF OF NORTHERN LAKE MICHIGAN WHICH COULD EXTEND INTO WESTERN PARTS OF MANITOULIN ISLAND THIS AFTERNOON AND EVENING.

LOCAL SNOWFALL ACCUMULATIONS OF 15 CENTIMETRES ARE EXPECTED IN THE HEAVIEST SNOWSQUALLS. IN ADDITION NEAR ZERO VISIBILITY IN BURSTS OF HEAVY SNOW ARE ALSO EXPECTED. AN OCCASIONAL CLAP OF THUNDER IS NOT OUT OF THE QUESTION IN THE MOST INTENSE SNOWSQUALLS.

IN AREAS TO THE NORTHEAST OF LAKE SUPERIOR FROM JUST NORTH OF MONTREAL RIVER TO PUKASKWA SNOWSQUALLS ARE QUITE POSSIBLE TONIGHT INTO SATURDAY IN A COLD SOUTHWESTERLY FLOW OFF OF THE LAKE.

SIGNIFICANT SNOWFALL AMOUNTS OF 15 CM OR MORE ALONG WITH WHITEOUT CONDITIONS FROM BURSTS OF HEAVY SNOW AND LOCAL BLOWING SNOW MAY BE ISSUES TO CONTEND WITH.

MOTORISTS SHOULD BE PREPARED FOR DANGEROUS WINTER DRIVING CONDITIONS AND ALLOW EXTRA TIME TO REACH THEIR DESTINATION. WHITEOUT CONDITIONS IN HEAVY SNOW AND BLOWING SNOW OFTEN DEVELOP SUDDENLY EVEN WHEN CONDITIONS JUST PRIOR TO THE SNOWSQUALL INCLUDED GOOD VISIBILITY WITH LITTLE OR NO SNOW.

PLEASE REFER TO THE LATEST PUBLIC FORECASTS FOR FURTHER DETAILS.