The Barbados international had been initially recalled by the Iron as cover for their injury problems, but he has now been allowed to return to County.
Magpies manager Ian McParland told the club's official website: "I'm delighted we've struck a deal to bring Jonathan back. He enjoyed his time with us earlier in the season so we were always in with a good chance of getting him back, especially with the good relationship we have with Scunthorpe.
"The lads and the fans know what Jonathan is all about and we're delighted to have him back with us.
"His pace will again give us an extra dimension in attack and I'm looking forward to seeing him back in our colours."