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