The Thunderbolts made a fast start at Suncorp but ultimately fell to the NYC Broncos 48-18.
Storm's Under-20s scored three tries in four minutes early in the first half as they looked at their very best.
They took an 18-12 half-time lead however they were unable to continue that wave of momentum.
The Thunderbolts would fail to trouble to scorers following the restart as the NYC Broncos began to take control.
Six unanswered tries saw the home side run out convincing winners to leave Storm's Under-20s on the outskirts of the NYC top eight.