yesterday (observation)	currently (observation)	today (forecast)	tomorrow (forecast)
Belgium	poor - 6	moderate - 5	poor - 6	poor - 6
Flanders	poor - 6	poor - 6	moderate - 5	poor - 6
Brussels	poor - 6	poor - 6	poor - 6	poor - 6
Wallonia	poor - 6	moderate - 5	poor - 6	poor - 6