LOZ061-120900-  MAFOR 1203/  ONTARIO WEST 1/2...GALE WARNING IN EFFECT...11640 11650 12640  13630 11720. Waves 5 to 7 feet building to 10 to 14 feet, and  occasionally around 18 feet overnight. Waves 10 to 13 feet  subsiding to 5 to 9 feet, and occasionally around 16 feet  Thursday. Waves 4 to 7 feet, and occasionally around 9 feet  Thursday evening.    ONTARIO EAST 1/2...GALE WARNING IN EFFECT...11646 11650 12640  11630 11640 11630 11730. A chance of snow showers overnight and  Thursday morning. Waves 3 to 6 feet building to 12 to 16 feet,  and occasionally around 20 feet overnight. Waves 10 to 15 feet  subsiding to 7 to 11 feet, and occasionally around 19 feet  Thursday. Waves 6 to 10 feet, and occasionally around 13 feet  Thursday evening.    $$