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Storm Concept Purple

Photo and specs courtesy of bowwwl.com. Reproduced with credit to the maker.

How it moves

Foul lineArrows · 15 ft46 ft · board 104.7° entry
Arcing turn (symmetric core). Dotted is skid, then the turn, then the roll into the pocket. Estimated from the coverstock, finish, core, and differential for a right-handed bowler with medium revs on a house shot. Lane conditions, speed, and layout move all of this.
Storm

Concept Purple

Overseas only
Hook potential5 (est.)5 of 10, estimated

How much the ball wants to hook, 1 (straight, a spare ball) to 10 (the strongest oil-eaters). The maker publishes no number for this ball, so this is estimated from the coverstock, core, finish, and differential.

Coverstock
ARC Pearl
Reactive pearl
Core
Radius
Symmetric
Factory finish
1000 Abralon
Color
Not listed
Released
2026-06-25
Sold
Overseas only
USBC
Approved 2026-05-26

Weights and specs

WeightRGDifferentialInt. diff
12 lb2.650.011—
13 lb2.630.009—
14 lb2.620.019—
15 lb2.610.020—
16 lb2.590.019—

Surface

oil · laneCoarse grit
oil · laneCoarse and fine
oil · laneFine grit or polish
1000 Abralon. Bites through heavy oil, so the ball reads the lane early and hooks sooner. Sanded balls (500 to 1000 grit) live here. Surface changes over games, and a pro shop can take any ball either way with a pad.

Balls like this

Same coverstock and core type; the closest company for this ball in a bag.