The largest snowflake officially recorded measured an astonishing 15 inches in diameter. This incredible natural phenomenon was documented near Missoula, Montana, in the year 1887.
Details of the Record-Holder
This colossal snowflake, noted for its immense size, stands as a testament to unique atmospheric conditions. Its impressive diameter makes it the largest individual snowflake ever observed and formally recognized, a record that has stood for over a century.
| Feature | Detail |
|---|---|
| Size | 15 inches (38 cm) in diameter |
| Location | Near Missoula, Montana |
| Year | 1887 |
| Status | World Record |
How Do Snowflakes Grow So Large?
While typical snowflakes are much smaller, certain specific atmospheric conditions can lead to the formation of these extraordinary giants. The term "snowflake" can refer to a single ice crystal or, more commonly, an aggregate of many ice crystals that have clumped together during their descent. The record-setting snowflake from Montana was almost certainly an aggregate of numerous crystals.
Several factors contribute to the growth of exceptionally large snowflakes:
- Temperature: Temperatures slightly below freezing (around -10°C to 0°C or 14°F to 32°F) are ideal. In this range, ice crystals tend to be "sticky," making it easier for them to collide and adhere to one another.
- Humidity: High humidity ensures there's ample water vapor available in the air for ice crystals to grow and coalesce.
- Atmospheric Stability: Calm air with minimal turbulence allows individual ice crystals sufficient time to grow, collide, and stick together without being broken apart.
- Long Fall: A long fall through a consistent layer of optimal temperature and humidity provides more opportunity for crystals to grow and gather other crystals, forming a larger aggregate.
The Challenge of Measuring Giant Snowflakes
Accurately measuring such delicate and transient structures poses significant challenges. Snowflakes are inherently fragile and melt quickly upon contact, making precise measurements difficult. This was particularly true in the 19th century when advanced measurement tools were not available. Despite these challenges, the consistent reports and the sheer scale of the 1887 observation have cemented its place in meteorological history.
For more information on the largest snowflake record, you can refer to the Guinness World Records entry. To understand more about how snowflakes form and achieve their unique structures, explore resources like the National Oceanic and Atmospheric Administration (NOAA).
