First, those scientists will tell you that the earth is warming. They've seen the numbers.
A warmer climate spurs the evaporation of water from land and sea and allows the atmosphere to hold more moisture—thus setting the stage for more extreme precipitation.
... Extreme precipitation is likely when a storm passes through a warmer atmosphere holding more water. In warmer months, it takes the form of torrential rainstorms; in winter, blizzards are more likely.
At the same time, most regions, in the face of warming temperatures, are losing snow cover on the ground that lasts longer than 30 days. Winters are shorter, fewer cold records are set, more precipitation is falling as rain and less as snow—although whopper snowstorms are even more likely..."