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