yesterday (observation)	currently (observation)	today (forecast)	tomorrow (forecast)
Belgium	fairly good - 4	fairly good - 4	moderate - 5	fairly good - 4
Flanders	fairly good - 4	fairly good - 4	moderate - 5	fairly good - 4
Brussels	fairly good - 4	fairly good - 4	moderate - 5	moderate - 5
Wallonia	good - 3	very good - 2	moderate - 5	fairly good - 4