Crude oil prices drop more than 1 percent as weak outlook prevails

* U.S., European cold snap to be short-lived * Unusually warm weather has so far dominated winter By Henning Gloystein SINGAPORE, Dec 30 (Reuters) - Crude oil futures fell around half a dollar early on Wednesday as the market remained under pressure from slowing demand and high supplies, while forecasts that a cold snap in Europe and the United States would be short-lived also hurt prices. Crude prices have plunged by two-thirds since mid-2014 as soaring output from the Organiza