Nollakelissä

Nollakelissä is a Finnish term that literally translates to "in zero weather" or "at zero degrees." It refers to the specific atmospheric conditions and associated challenges that occur when the temperature hovers around the freezing point of water, 0 degrees Celsius (32 degrees Fahrenheit). This temperature range is particularly problematic because it can lead to a variety of hazardous situations, especially concerning precipitation and its effects on surfaces.

When the temperature is around zero, precipitation can fall as rain, snow, or a mixture of both. If the ground surface is at or below freezing, falling rain can freeze on contact, creating a layer of ice. This phenomenon is known as freezing rain and is a significant cause of slippery roads and sidewalks, leading to increased risk of accidents and falls. Similarly, if snow falls and then the temperature drops to or below zero, existing slush or wet snow can freeze into hard ice.

Nollakelissä poses challenges for transportation, infrastructure, and daily life. Driving becomes treacherous due to reduced traction. Pedestrians must navigate icy patches. Buildings and structures can be affected by ice buildup. Municipal services often face increased demands for de-icing and snow removal during these periods. The unpredictable nature of temperature fluctuations around the freezing point makes planning and preparedness crucial for mitigating the difficulties associated with nollakelissä. This weather condition is common in many temperate and subarctic climates during autumn and spring.