The 19-year-old becomes the second Ram to move temporarily to Meadow Lane following Alefe Santos's loan switch on Friday.
Thomas was named Derby's Under-21 Player of the Year in 2013-14 and made his first-team debut as a substitute against Leeds United in November.
He could make his Magpies debut at home to Crewe Alexandra on Saturday.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | West Bromwich AlbionWest Brom | 6 | 5 | 1 | 0 | 10 | 2 | 8 | 16 |
| 2 | Sunderland | 6 | 5 | 0 | 1 | 13 | 4 | 9 | 15 |
| 3 | Burnley | 6 | 4 | 1 | 1 | 13 | 4 | 9 | 13 |
| 4 | Sheffield UnitedSheff Utd | 6 | 4 | 2 | 0 | 9 | 3 | 6 | 12 |
| 5 | Blackburn RoversBlackburn | 5 | 3 | 2 | 0 | 12 | 6 | 6 | 11 |
| 6 | Leeds UnitedLeeds | 6 | 3 | 2 | 1 | 9 | 4 | 5 | 11 |
| 7 | Swansea CitySwansea | 6 | 3 | 1 | 2 | 7 | 4 | 3 | 10 |
| 8 | Watford | 6 | 3 | 1 | 2 | 10 | 9 | 1 | 10 |
| 9 | Oxford UnitedOxford Utd | 6 | 3 | 0 | 3 | 10 | 8 | 2 | 9 |
| 10 | Derby CountyDerby | 6 | 3 | 0 | 3 | 8 | 7 | 1 | 9 |
| 11 | Norwich CityNorwich | 6 | 2 | 2 | 2 | 8 | 7 | 1 | 8 |
| 12 | Middlesbrough | 6 | 2 | 2 | 2 | 6 | 5 | 1 | 8 |
| 13 | Bristol City | 6 | 2 | 2 | 2 | 8 | 12 | -4 | 8 |
| 14 | Queens Park RangersQPR | 6 | 1 | 4 | 1 | 8 | 9 | -1 | 7 |
| 15 | Luton TownLuton | 6 | 2 | 1 | 3 | 5 | 8 | -3 | 7 |
| 16 | Hull City | 6 | 1 | 3 | 2 | 5 | 7 | -2 | 6 |
| 17 | Stoke CityStoke | 6 | 2 | 0 | 4 | 4 | 9 | -5 | 6 |
| 18 | Millwall | 6 | 1 | 2 | 3 | 9 | 9 | 0 | 5 |
| 19 | Coventry CityCoventry | 6 | 1 | 2 | 3 | 6 | 8 | -2 | 5 |
| 20 | Plymouth ArgylePlymouth | 6 | 1 | 2 | 3 | 5 | 10 | -5 | 5 |
| 21 | Sheffield WednesdaySheff Weds | 6 | 1 | 1 | 4 | 6 | 12 | -6 | 4 |
| 22 | Preston North EndPreston | 5 | 1 | 1 | 3 | 3 | 9 | -6 | 4 |
| 23 | Portsmouth | 6 | 0 | 3 | 3 | 7 | 13 | -6 | 3 |
| 24 | Cardiff CityCardiff | 6 | 0 | 1 | 5 | 1 | 13 | -12 | 1 |
| > Championship Full Table | |||||||||
