Daily How Much

A white Christmas usually means at least 1 inch of snow on the ground on December 25; Canada uses 2 cm, and the UK counts any falling snow.

On average, about 10 inches of snow equals one inch of water, but real storms range from 5:1 in wet snow to 20:1 or more in dry powder.

At a 10:1 ratio, about 16 inches of new snow over 1 sq ft equals a gallon of water; wet 5:1 snow needs ~8 inches, fluffy 20:1 ~32 inches.

About 16 inches of typical 10:1 snow over 1 square foot melts into 1 gallon of water.

There’s no fixed snowfall amount to cancel flights; snowfall rate, visibility, runway condition, and deicing capacity drive decisions.

There’s no single inch count; airport closures depend on rate, runway condition codes, visibility, wind, and snow-removal capacity.

Most districts call a snow day around 4–6 inches of snow or any glazing ice, but timing, wind chill, and road safety often matter more.

Light snowfall near 0.5–1 inch turns the ground white; around 1–2 inches brings near-continuous cover, depending on surface and temperature.

A modern snowmaker produces roughly 25–95 m³ of snow per hour, depending on wet-bulb temperature, water flow, and model.

One inch of liquid typically yields around 10 inches of snow, but real outcomes range from about 5 to 30 inches.