The map will be prepared every six hours, four hours before the validity time. In the event of major changes before the validitytime, there will be an updated map, a so-called AMD NSWC.
The chart is produced in cooperation with Aviation services at the Finnish Meteorological Institute, FMI
NSWC
Last updated
Published
Nordic Significant Weather Chart is a review of the aviation forecasts in Sweden and neighbouring countries, valid for a fixed moment in time.