 The city of Vancouver was under a boil water advisory due to two of the main reservoirs overflowing.The snowstorm occurred because of another huge low pressure system, but this time, colliding with an arctic ridge resulted in extremely heavy snow and causing overnight temperatures to dip to well below seasonal values; -12 °C (10.4 °F) on the 28th and -11.6 °C (12.9 °F) on the 29th.Daily high temperatures hovered at a frigid -5 °C (23 °F) on the 28th as the arctic ridge began to stabilize over the south coast.