Wild weekend weather pattern to exhibit nation divided by extremes

It’s that time of year where the seasons change. But this weekend, the season you get might not be fall. It could feel like spring, summer or winter depending on where you live — all thanks to a highly amplified jet stream pattern set to spill wacky weather over the Lower 48.
The jet stream, diving south across the Western states, will unleash unusually cold weather and, in the mountains, snow. But, like a seesaw, the jet stream will bulge northward over the eastern United States, allowing warm tropical air to follow by Sunday. In the middle, over the Plains and Upper Midwest, stormy conditions will prevail.


https://www.washingtonpost.com/weather/2018/10/05/wild-weekend-weather-pattern-exhibit-nation-divided-by-extremes/?utm_term=.9bb44ef62430