qWhen winds are weak, the heat of the lake will force air over
the lake to rise, drawing
air in from both shores toward the center of the lake.
qA snow
band develops where these airflows meet.
qShore-parallel bands are typically deeper than wind-parallel
rolls, often extending to a depth of 3km.
qShore-parallel bands are common over Lakes Erie and Ontario,
where the lake axis is
west-east.