Písavý

Písavý is a type of smoke or fog that forms when the temperature of the air near the surface of a lake or a stream is cooled, causing the water to evaporate and create a heavy, damp mist.

This phenomenon typically occurs in areas with cold water sources, such as glaciers or rivers that flow from them. When the warm air from the surrounding landscape meets the cold water, it forces the air to rise and cool, creating the condiions necessary for psisavy to form.

Písavý often appears as a veil-like cloud or fog that hangs in the air and can be difficult to see through. In some cases, it can reduce visibility to near zero, making it challenging for people to navigate through the area.

The term "písavý" is often used specifically in the mountainous regions of Slovakia and the Czech Republic to describe this type of atmospheric condition. In scientific literature, it is sometimes referred to as "cold fog" or "evaporative fog".

Písavý is an atmospheric condition that poses special challenges to hikers, hunters, and other outdoor enthusiasts who venture into areas with cold water sources. It requires careful navigation and planning to avoid getting lost or caught off guard by the reduced visibility.

While pisavy can pose challenges for outdoor enthusiasts, it is not typically a hazardous condition for people who are prepared and familiar with the area. However, it does highlight the importance of being aware of local weather conditions, even in seemingly idyllic mountainous regions.