Accretion (meteorology) Accretion (meteorology) Accretion is defined as the gradual collection of something over time. In meteorology or atmospheric science it is the process of accumulation of frozen water as precipitation over time as it descends through the atmosphere, in particular when an ice crystal or snowflake hits a supercooled liquid droplet, which then freeze together, increasing the size of the water particle. The collection of these particles eventually forms snow or hail in clouds and depending on lower atmosphere temperatures may become rain, sleet, or graupel. Accretion is the basis for cloud formation and can also be seen as water accumulates
Centenary 1000 Mt St Bernard and Hotham Heights. The stage however was interrupted with a torrential downpours of rain hail and sleet and the race was suspended at Mt Buffalo, after covering around . The riders were accommodated at the Mt Buffalo Chalet as they were effectively marooned, with the road to Wangaratta under of water, the Alpine road over Mt St Bernard was impassable and of snow fell at Mt Hotham. Milliken suffered a puncture on Mt Buffalo and had to wait more than an hour for a spare wheel. It was reported that he was almost frozen and he abandoned