As an iceberg travels across to the surface of the water above Bikini Bottom, causing it to snow underwater. Everyone is having fun in the snow, and SpongeBob and Patrick decide to have a snowball fight. Meanwhile, Squidward is relaxing at home with a cup of tea. He hears the sounds of SpongeBob and Patrick's fighting and tells them to quiet down. They try to convince him to come out and play with them, both trying to get him on their own side.
Squidward decides that, as entertainment, he will watch them fight, hoping they will get hurt. SpongeBob and Patrick realize that snowball fights are for children, and they sign a peace treaty. Squidward tries to convince them to continue, but gets hit with a snowball. He then decides to join in the fight. He makes a small fort which provides him no protection, and soon begins making it larger. He begins relentlessly pelting SpongeBob and Patrick with snowballs, and hits everyone with snowballs, and soon his fort has grown into a tower.
After being hit by a snowball containing his clarinet, SpongeBob and Patrick decide that Squidward is taking it far too seriously, and go back inside. A paranoid and riled-up Squidward does not realize that the fight is over, and continues to throw snowballs, as an overhead palm branch keeps dropping snow on his head. Meanwhile, SpongeBob and Patrick relax in the pineapple watching TV with hot chocolate and popcorn.
( ‣ ) Associated production music
( • ) Original music
( ◦ ) SpongeBob music
‣Wonderland of Snow - Terry Day [title card] ‣America, A Dream Comes True - Gregor F. Narholz [opening] ‣Jolly Sleighride - Ib Glindemann [Bikini Bottom covered in snow] ‣Danger Zone - Mike Sunderland ["This is serious, SpongeBob."] ‣ ? ["Snowball fight?"] • ? - Nicolas Carr [Patrick trying to make a snowball] ‣ ? [SpongeBob and Patrick glare at each other] ‣Romantic Waltz - Geoffrey Herman [Squidward relaxing] ‣The Merry March (a) - Paddy Kingsland [SpongeBob and Patrick building forts] ‣Tomfoolery - David Snell [Patrick choking on snow] ‣Comic Walk - Sidney Torch ["Snowball fights are for immature children."] • ? - Nicolas Carr ["Hmm..."] ‣Tympup A - Sammy Burdson, John Charles Fiddy [SpongeBob and Patrick shake hands] ‣Comic Walk - Sidney Torch [peace treaty] •Twelfth Street Rag - Sage Guyton, Jeremy Wakefield [Squidward trying to start another snowball fight] ‣Marshall Strength Link - David Snell [SpongeBob and Patrick throw snowballs at Squidward] ‣I Saw Three Ships 29 (c) - Richard A. Harvey ["That was actually kind of exciting."] • ? - Sage Guyton, Jeremy Wakefield [Squidward throwing snowballs] •Vibe Sting - Nicolas Carr ["What's going on?"] ‣Chase Cue 2 - Sage Guyton, Jeremy Wakefield [Squidward rebuilding his fort]
"Snowball Effect" was ranked #20 during the Best Day Ever event on November 9–10, 2006.
While it was Bikini Bottom's first actual snow day, this really marks SpongeBob and Patrick's second winter-based fun since "Survival of the Idiots".
Running Gag: Squidward's fireplace is put out by a snowball that was thrown.
When Squidward is sitting next to his fireplace, a replica of his head with moose antlers is seen hanging on a plaque on his wall.
A tiny clip of this episode was shown in a Lego SpongeBob commercial.
Netflix mistook the title for, "The Snowball Affect".
When Patrick tries to make a snow angel, he only makes a circle. This might be a reason because he's a sea star, and he is already a snow angel shape.
Patrick's alias "Pink Menace" is a reference to the "Red Menace", a nickname for the Soviet Union that was popular during the Cold War.
The Title is a reference to the phrase "snowball effect" which means:
Literally: The effect used in a cartoon when a skier is skiing and trips and falls and makes a snowball that grows bigger and bigger.
Metaphorically: When a situation gets out of hand.
"The Snowball Effect"" is also the title of a famous short story by Katherine MacLean.
In the beginning during the news report,when the sign changes from stop to go, the snow that was on it before it changed levitates.
When Squidward speaks about his being attacked in the rear, there is already a wall there and all he does is turn around, laugh, and pat the wall. But he is never seen building it.
When Mrs. Puff blows the snow off her boat and onto a nearby fish, the fish pops his head out, and yells "Hey!", although his mouth doesn't move.
When Squidward is demonstrating his fort and how it should be used, and Patrick throws snowballs at him, his arm doesn't move.
When SpongeBob is first seen with his fort, it is circular and shorter than him. But when the camera returns to SpongeBob, his fort has changed shape and is about as tall as him. And when the camera returns to SpongeBob again, his fort returns to how it originally was.
When Squidward drops his snowball after he refuses to be on neither Patrick or SpongeBob's side, the mark that he makes in the snow disappears when the camera pans out.
When the camera shows Patrick laughing after hitting SpongeBob with a snowball, his fort is smooth. Before, it was full of bumps. Also, when Patrick comes upon the barrage of snowballs SpongeBob serves at him, his fort is bumpy again. Also, all the square snowballs he was seen with are gone.
When a closeup of the DNA strand snowball Patrick made is shown, the sky is light blue instead of gray.