Topic summary
Main Divide

Extracted from the Wikipedia article Southern Alps.
Climate
New Zealand has a humid maritime, temperate climate with the Southern Alps lying perpendicular to the prevailing westerly flow of air. Annual precipitation varies greatly across the range, from 3,000 millimetres (120 in) at the West Coast, 15,000 millimetres (590 in) close to the Main Divide, to 1,000 millimetres (39 in) 30 kilometres (19 mi) east of the Main Divide. This high precipitation aids the growth of glaciers above the snow line. Large glaciers and snowfields can be found west of or on the Main Divide, with smaller glaciers farther east (See Glaciers of New Zealand).