Garrett’s Blog: Ragweed Made Worse By Wind & Dry Weather

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Scanning Electron Micrograph (SEM) of ragweed (Ambrosia artemisiifolia) pollen; magnification x2400.

While most of the the notorious allergy producers occur in the Spring months, the late summer is when Ragweed allergies kick into full gear.

According to one study at the University of Tulsa the peak concentration of airborne Ragweed allergens is around September 10th. Image 27

The highest amount of allergens occur with warm and windy weather; the lowest amount with humid & wet weather.

The highest amounts of irritants in the atmosphere is around the 10am-3pm each day.

Image 28

Ragweed isn’t the only allergen out there. According to the Hedberg Allergy Clinic in Northwest Arkansas, mold and grass are both at above normal levels. This is due (in part) to the above normal rainfall we’ve had over the summer months which has kept the allergy season going well into the summer months and likely had a role in the higher than normal ragweed counts underway right now.

Ragweed season typically comes to an abrupt end with the arrival of the fall cold fronts and freezing overnight weather. This should start to occur around the 1st or 2nd week of October.