This isn't exactly true (actually, it's false.). The shift to using the "climate change" wording happened not because warming was slower than forecast (it's actually remained well within the IPCC's "most likely" forecast). It's because "climate change" is actually a more accurate term for what warming means.You’re late to the party. When the warming part of global warming turned out to be less true than advocates liked it was rebranded as climate change years ago. It’s tougher to disprove climate change and more opportunities abound for government funded research, so it’s a win all the way around.
Anyone with any meteorology background knows that all weather on the planet is ultimately driven by the sun. Thermal gradients, coupled with the planet's rotation, create every wx phenomenon in existence. More latent heat means steeper gradients, which means more - and more severe - weather of all types, from heat waves and droughts to severe Arctic storms spreading farther south.
As OzPiper noted, we're seeing an increase in all types of severe wx these days. For sure, one event like this storm in CA isn't evidence of anything, but we have long term trends of increasing frequency of outlier weather now... Which is exactly what we've always expected to see with a warming climate.
It's almost like the science actually works.