It looks as though they just couldn't resist the urge to link every known weather event to climate change. The Union of Concerned Scientists has apparently said that this winter's crazy weather in the USA was caused by global warming:
This winter's heavy snowfalls and other extreme storms could well be related to increased moisture in the air due to global climate change, a panel of scientists said on Tuesday. This extra moisture is likely to bring on extraordinary flooding with the onset of spring in the Northern Hemisphere, as deep snowpack melts and expected heavy rains add to seasonal run-off, the scientists said in a telephone briefing.