Pollen Forecast for Centerville, Iowa
High
Cedar/Juniper, Elm, Maple
Discussion
Concentration of pollen grains in the air for Thursday will be falling but will remain in the very high range. The cause for the falling pollen levels is lack of winds and expected precipitation in the morning and evening which tends to wash pollen out of the air.
Allergy Facts
Although most elm trees pollinate in the spring, some species flower (shed pollen) in the fall. Chinese elm, which is common in the south and California, pollinates in the late summer through October.