Frostfalls

Frostfalls refers to a natural phenomenon where supercooled water droplets in the atmosphere come into contact with surfaces and freeze instantly. This typically occurs in sub-zero temperatures when there is moisture present, such as fog or light precipitation, and the temperature of exposed objects is at or below the freezing point of water. Unlike ice storms which involve liquid precipitation freezing on contact, frostfalls are characterized by the direct freezing of airborne moisture.

The formation of frostfalls can lead to the rapid accumulation of ice on various surfaces, including trees, power lines, roads, and buildings. The ice deposited by frostfalls is often clear and can be quite dense, adding significant weight to structures. This can cause damage to infrastructure, including fallen branches and power outages. The appearance of frostfalls can create striking visual effects, coating landscapes in a layer of ice.

Factors influencing the severity of frostfalls include the temperature, humidity, wind speed, and the nature of the exposed surface. Surfaces that are already cold and smooth tend to accumulate ice more quickly. While often associated with colder climates, frostfalls can occur anywhere with the right atmospheric conditions. Understanding the conditions that lead to frostfalls is important for predicting and mitigating potential hazards.