Serena Gray-Withers (Winnipeg, MB) lost 8-7 to Mackenzie Zacharias (Altona, MB) in the Final of the MJCT Tour Championships, held November 30 - December 2, 2018 at the Fort Garry Curling Club in Winnipeg, Canada. To advance to the championship game, Gray-Withers won 7-2 over Talyia Tober (Winnipeg, MB) in the semifinals of the 2018 MJCT Tour Championships in Winnipeg, Manitoba, Canada;
 
Gray-Withers finished 4-0 in the 0-team qualifying round. . In their opening game, Gray-Withers defeated Shae Bevan (Winnipeg, MB) 7-5, then won 6-4 against Victoria Beaudry (Winnipeg, MB) and 6-3 against Brooklyn Onagi (Winnipeg, MB). Gray-Withers won 8-1 against Meghan Walter (Winnipeg, MB) in their final qualifying round match.
 
. For week 16 of the event schedule, Gray-Withers did not improve upon their best events, remaining at th place on the World Ranking Standings with total points. Gray-Withers ranks th overall on the Year-to-Date rankings with points earned so far this season.