The experts of the TRANSWAT project (V. Akstinas, D. Jakimavičius and S. Nazarenko. Lithuanian energy institute) performed the last expedition of discharge measurements in the tributaries of Ilgė lake (Rokiškis District Municipality) on February 21-23, 2022. The extremely high water levels were obtained in the inflow and outflow of the lake. Such favourable hydrological conditions helped to estimate the maximum amplitude of fluctuations of hydrological indicators during the season of 2021/2022.