yesterday (observation)	currently (observation)	today (forecast)	tomorrow (forecast)
Belgium	poor - 6	moderate - 5	moderate - 5	fairly good - 4
Flanders	poor - 6	moderate - 5	poor - 6	fairly good - 4
Brussels	very poor - 7	poor - 6	moderate - 5	fairly good - 4
Wallonia	poor - 6	good - 3	moderate - 5	fairly good - 4