According to Time there will indeed be protests tomorrow, but the idea of violent unrest seems to have been largely blown out of proportion:
http://time.com/5008829/antifa-november-4-rumors/
There will indeed be anti-Trump rallies in 20 cities around the U.S. on Saturday, from Atlanta to Honolulu, organized by a left-wing political action group called Refuse Fascism whose goal is unseating Trump. But its tactics — including but not limited to a “passionate speak-out with music and participatory art” — are a far cry from violent insurrection.
Nor is it likely that the streets will be teeming with angry mobs: only 990 people have said that they’re attending the demonstration in New York, according to the event’s Facebook group.
(It’s also worth noting that “Antifa,” contrary to what many on the right believe, is not a single group. Rather it’s a broad term for a very loose confederation of left-wing activist types, acting both individually and under the aegis of smaller political groups. They’re all tenuously strung together by nothing more than an opposition to Trump and a willingness to make it known publicly.)
That these protests have metastasized in the far-right mind into a literal coup d’etat is a case study in how the internet alchemizes anxiety and immediacy to produce disinformation. Mainstream outlets like Fox News have amplified it, devoting airtime to the impending “Antifa apocalypse.” (President Trump himself has vilified the Antifa protest movement before, referring to “bad dudes on the other side” after the white nationalist demonstration in Charlotteville, Va. in August.)
Similar story as above by Newsweek:
http://www.newsweek.com/antifa-rallies-november-4-promise-remove-trump-white-house-700406
Ya, looks like it was what I thought it was:
https://www.buzzfeed.com/janelytvynenko/fox-news-ran-a-false-segment-warning-of-an-upcoming-antifa
On Saturday, Fox News ran a misleading segment and posted an article about an upcoming "antifa apocalypse," a term invented by right-wing commentators.
...
Many publications picked up on the claims to debunk them, including Time, Snopes, Washington Post, and BuzzFeed News. However, the Fox News report put more weight on the false claims of pro-Trump commentators. "Antifa apocalypse? Anarchist group's plan to overthrow Trump 'regime' starts Saturday," says the headline. The Fox News article already has 46,000 shares, comments, and likes on Facebook according to social tracking tool BuzzSumo. Fox News didn't immediately respond to a request for comment.