The weather in Lappeenranta, South Karelia, Finland, for the next seven days, hour by hour. Ilma averages six forecast models and shows the band the models fall in: a narrow band means a confident forecast, a wide one means uncertainty.
Every night the forecast is checked against the Finnish Meteorological Institute's weather station in Lappeenranta, hour by hour, side by side with the forecasts of the Finnish Meteorological Institute, Foreca, Google and Yr. The map shows the rain radar and Ilma's estimate for the next hour.
How accurate forecasts have been in Lappeenranta →
Ilma averages six forecast models: ECMWF AIFS and its ensemble, ECMWF IFS, MET Nordic, the Finnish Meteorological Institute's edited forecast and Open-Meteo. The shaded band on the chart shows how much the models disagree.
Accuracy is verified every night against 14 Finnish weather stations, and the results are shown on the page. The site claims to beat a competitor only when the difference is statistically significant.
Yes, for Finland. The map shows the newest radar scan from the Finnish Meteorological Institute and Ilma's estimate of where the rain moves in the next hour, in 5-minute steps. Each future frame shows how often that estimate has been right over the last week.