yesterday (observation)	currently (observation)	today (forecast)	tomorrow (forecast)
Belgium	good - 3	very good - 2	good - 3	good - 3
Flanders	good - 3	very good - 2	good - 3	fairly good - 4
Brussels	fairly good - 4	very good - 2	good - 3	fairly good - 4
Wallonia	good - 3	very good - 2	fairly good - 4	good - 3