NSWC

Nordic Significant Weather Chart is a review of the aviation forecasts in Sweden and neighbouring countries, valid for a fixed moment in time.

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