The Finnish Meteorological Institute said that between Monday morning and Tuesday morning, 10 to 20 cm of snow fell in the southern and south-western parts of the country.

Matti Houtonen, a meteorologist at Finnish national broadcaster Yle, says temperatures in southern Finland have dropped to zero point, a sharp contrast to typical springtime temperatures of about 10 degrees Celsius or more.

Helsinki Regional Transport Authority (HSL) announced the complete closure of the city's tram network due to freezing rain and snow accumulation, which led to ice accumulation on overhead power lines and disruption of various networks, Xinhua news agency reported. Obstacles arose at places.

As a result, many HSL bus services experienced delays or cancellations, with some commuter trains operating at reduced service. The Finnish Meteorological Institute described conditions as "very bad".

HSL media spokesperson Johannes Lettila highlighted the unprecedented nature of the situation, noting that freezing rain had blocked overhead power wire lines, exacerbating the challenges posed by heavy snowfall.

Meanwhile, Finnish airport operator Finavia reported flight delays and cancellations due to adverse weather conditions.

Apart from Helsinki, bus services in other cities in southern Finland including Turku were disrupted due to the snowstorm on Tuesday morning, Yle reported. Some buses went off the road and ended up in ditches.

Despite the disruptions, tram services in the capital region gradually resumed on Tuesday afternoon, according to the latest information provided by HSL.