1630 is an AM oldies station out of Englewood Cliffs, near the GW. Hoboken is 15 miles south. Possible that somebody overrode the signal at the location where the radio picked it up. Maybe some radio geek with a shortrange transmitter pulling a weird prank and now getting google hits.
Also emergency broadcast station for Chester township; that is in Chester, New Jersey, 20 miles from the Newark airport; it went on-air in October last year:
http://chestertownship.org/get-connected/emergency-radio-station-1630-am-now-active/
“...The station runs pre recorded loops, which are changed as the situation warrants. ...”
I had a friend listen; its saying “Trump April 26th”.
The Connecticut, Delaware, Maryland, Pennsylvania, and Rhode Island were held on April 26th of this year
http://www.freerepublic.com/focus/chat/3471995/posts?page=77#77