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