Snowman Workshop

Snow

Air temperature-2.0 °C

Snowballs

Drag on the snow, or use the arrow keys. A ball grows as it picks up snow.

Add ball of size

Add-ball skips the rolling: it appears already full size at the current density.

Stack big to small: roll next to the tower and let go, or press Enter.

Decorations

Every piece has mass, a wind area and a colour: dark coal soaks up sunlight.

Tower

Wind0 m/s

Gustiness0.30

Yard slope0.0°

Wind and slope both push towards the downhill side. A garden slope, not a mountain.

Force arrows (1 m = 1500 N): weight, wind, ground reaction.

Stability

Sunshine

Peak sunlight in W/m². Air temperature is the daily mean (±3 °C swing). Wind from the Test tab speeds up melting.

Time of day18:36

Radius over time (G)

Snowman Workshop

Warming up the workshop...

Did you know? A snowball roughly doubles its radius when it has rolled four times as far as it needed to grow the first time (r² grows in step with path length).

3D view unavailable

This simulation needs WebGL2. Please try another browser or device.