This type of cold is part of global warming. With the lack of Arctic ice, the temperature difference between the North Pole and the mid-latitudes has decreased. It is this temperature difference that drives the jet stream.
As the strength of the jet stream decreases, the Rossby waves in the jet stream increase in deviation, that is, the loops in the jet stream that let cold air penetrate farther south and warm air penetrate farther north increase. See image!
This increase in the Rossby waves has been gradual and going on for decades. For example, once upon a time, northern Florida grew oranges - no more.
Aside from this process putting the rest of Florida's citrus industry at risk, there will be numerous other economic consequences - particularly when you consider this process could lead to killing frosts occurring much later in the spring.
Between this and the OP we find the difference between science and the Cult of Ignorance. Respectively.
It appears we are heading for a period of global COOLING. The sun is not very active....you know? ...that big ball of fire in the sky...do you think man has more power over our climate than it?
WISHING FOR GLOBAL WARMING
The below chart shows solar activity crashing down. With the lowest sunspot count in a hundred years, with agricultural sectors hit hard and food prices continuing to spiral up, what USA Today said is not funny. The weekend of June 11, 2017 saw more snow in California and thoughtful people are starting to think of using more than tar and feathers to put certain individuals from NOAA and NASA in their place.
I know it is not easy to think with facts in this world of climate lies but solar cycle 24 has seen very low solar activity thus far meaning the last thing we need to be afraid of is global warming. Dr. L.E. Kaiser writes, “It’s already the month of June and both air and water temperatures are well behind the seasonally adjusted “global warming = climate change = frying planet” conditions that were proclaimed by so many climate doomsters.”
Regarding the sun, my post was not discussing that issue. It is simply about the jet stream, what drives the system, and why it is weakening.
I understand that solar output this cycle is low, but this could be a disaster. Imagine that the planet cools because of the lack of solar output, and the world decides it is just fine to continue with business as usual regarding burning fossil fuels.
This will lead to a disastrous outcome when the sun returns to the output of previous cycles. We are already so deep into climate change that both the Greenland and West Antarctic ice sheets will likely disintegrate to a large degree resulting in meters of sea level rise in the distant future.
As Wallace Broecker, from Columbia University, says "Climate is an angry beast and we are poking at it with sticks”