The pollen report for Thursday, May 12, 2016:
Trees: Very High
Grasses: Moderate
Ragweed: Not Seen
Other Weeds: Not Seen
Mold Spores: High
Predominant allergens: Oak and Mulberry Tree Pollen
Overall Tree Pollen remains Very High. Of particular note, Oak Tree Pollen and Mulberry Tree Pollen both increased significantly in the Philadelphia air sample: Oak tree pollen levels nearly quadrupled while Mulberry Tree Pollen volume almost doubled. Mulberry Tree Pollen also increased in the suburban (Mount Laurel, NJ) air sample. There also have ben observed increases in Pine Tree Pollen and Grass Pollen. The tree pollen count is higher today than Wednesday. Trees don't need to be at extreme levels in the air to trigger moderate to severe symptoms.
Source: The Asthma Center