In the lee of one of the Great Lakes works well during fall or winter, when an active low pressure area is moving quickly across the continent. Follow the strong system east from Lake Superior to Montreal and you're certain to find high moisture content. (Read E.K. Gann, et al, about flying the mail routes across the northern border!).
Alternatively, one can always find 'good' ice immediately off the east coast of Newfoundland (Gander, or St Johns are both good bases) in stratus cloud conditions which are very common in the 1,000' to 3,000' range and predictable in the right winter conditions.
Then, go do crosswind landing limit expansion when the system passes over Keflavik. Great winds, long, wide runways with no obstructions and no topographic features to disturb the strong westerly flow across the ocean.
Last edited by twochai; 29th September 2010 at 14:29.
Reason: Clarity