Global Warming…Then Why So Cold?

If Global Warming is really happening...why does it seem like it's taking FOREVER for the weather to warm for Spring?  Is Global Warming really happening? According to National Geographic it is.

Is It Happening? Yes. Earth is already showing many signs of worldwide climate change. Average temperatures have climbed 1.4 degrees Fahrenheit (0.8 degree Celsius) around the world since 1880, much of this in recent decades, according to NASA's Goddard Institute for Space Studies.

The rate of warming is increasing. The 20th century's last two decades were the hottest in 400 years and possibly the warmest for several millennia, according to a number of climate studies. And the United Nations' Intergovernmental Panel on Climate Change (IPCC) reports that 11 of the past 12 years are among the dozen warmest since 1850.