Stormfur is a muscular, strong, broad-shouldered, long-haired, dark gray tom with amber eyes, a broad head, and sleek gray fur.
- He has been mistakingly described with blue eyes.
- He has SkyClan blood, because his grandparents, Willowpelt and Patchpelt, are Spottedleaf's siblings.
- Stormfur's grandmother, Willowbreeze, is half-WindClan, thus making him and his sister mixed with the blood of four Clans:ThunderClan, RiverClan, WindClan, and SkyClan.
- In Moonrise, he is mistakenly called "Sormfur" on page 16.
- In Sign of the Moon, he is a prey-hunter, but in other books he is a cave-guard. Found in Allegiances.
Mother: Silverstream, Verified StarClan member
Sister: Feathertail, Verified StarClan member
Half-Sisters: Blossomfall, Briarlight
Son: Pine that Clings to Rock
Mate: Brook where Small Fish Swim
Daughter: Lark that Sings at Dawn