Regional water situation

Eastern and Southeast Finland 12.4.

Snow melted by the warm weather has caused the water levels to rise earlier than usual throughout the Vuoksi river basin. Near Lake Saimaa, snow has already largely melted and the water levels in smaller lakes are approaching flood peaks. In the regions of North Savo and North Karelia, the water levels in lakes have started rising earlier than is usual in the spring, but the weather will become cooler next week and decelerate the rise in water levels. Spring flood peaks are forecast to be higher than usual due to the larger-than-usual amounts of snow.

In the regions of South Savo and South Karelia, the water levels in lakes will reach exceptionally high levels in places. For example, it is forecast that the water level of Lake Kuolimo will rise by around 10 cm by May Day. If this realises, its water level would be at its highest since 1995. The water level of Lake Suurjärvi in Savonlinna is forecast to reach its highest level in the 21st century as early as the beginning of next week.

The water level in Lake Saimaa is over 50 cm above the median level of the time period due to the rainy autumn. The water level has started to rise, amounting 30–60 cm by mid-June according to forecasts. Additional flow regulation has been carried out in Lake Saimaa since the autumn due to the high water level. Despite the flow regulation, the water level may reach flood levels in May and June.

The water level of Lake Pielinen is approximately 30 cm above the average level and has started to rise earlier than usual due to the melting snow. According to the forecast, the spring flood in late May or early June will be considerably greater than usual. For this reason, special flow regulation has been initiated from Lake Kaltimo to avoid potential flood damage.

The melting snow has caused the water level of Lake Kallavesi to rise rapidly. According to the forecast, the water level will rise by another 40–70 cm by mid-May. Lake Kallavesi is also forecast to reach a higher flood peak than usual.

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