It will be wet around the edges and dry in the middle. Forests burn every summer; grass grows in their place. Wind: hurricanes, tornadoes, typhoons, blizzards, sandstorms.
People wandering about in large and small groups, the large, better-armed ones wiping out the small whenever they encounter one another; eating up the last animals and fish - which are mostly radioactive from all those destroyed coastal nuclear reactors and missile bases; pretty much all the maritime people have cancer and ugly babies. New, ever-more-barbaric religious cults spread.
Some half dozen isolated mountain villages survive intact. In a thousand more years... who knows?
Many events were predicted and didn't happen. That makes people optimistic: "I didn't die when I jumped off the barn roof, and that proves I'll be okay jumping off the 17th floor balcony."
And some extinctions did happen, even though nobody predicted them.