Pollen Alerts For Portland, MO

Pollen Index: 11.8 Pollen Level: high Predominant Pollen: Oak, Cedar/Juniper and Maple. Concentration of pollen grains in the air for Wednesday will be falling in the moderate range. This relief in pollen levels is caused in part by falling temperatures, rising humidity and heavy rains in the morning and evening which tend to wash pollen out of the air. That's good news for allergy sufferers.