Oak pollen, which gets very high counts here at times, is a very light pollen and can be very widely spread. Pine pollen, also high at times, is large and heavy and is not as widely distributed - unfortunately the trees are tall and there are a lot of them here. Probably the best use of this report is to know when certain types of plants are pollinating. Weather conditions affect the pollen count greatly. Dry weather usually causes an increase in the amount of pollen dropping.
Rain usually washes a lot of pollen out of the air - counts go down.
Wind can cause pollen to be carried farther. Our pollen sampling covers a 24 hour period. Pollen concentrations are usually highest between 5 am and 10 am and this can make a difference in how much you are affected by pollen. We try to use the common name of plants. People from different parts of the country sometimes have different names for them.