Issued 1st of August 2019
Situation and medium-term forecast for August 2019
Burden from mugwort and ragweed pollen!
The ragweed pollen season will soon dominate in relation to the caused burden for pollen allergy sufferers: First ragweed plants already started flowering during the first half of August and will burden in a low to moderate extent. Ragweed pollen concentrations will reach high to very high concentrations during the second half of August in concerned regions. The burden from ragweed will play a major role during August in the concerned regions of Austria, especially in Burgenland, Vienna, Lower Austria, Styria, parts of Upper Austria and Carinthia.
A higher burden prevails in proximity to flowering ragweed, however the distribution varies. The burden of weed pollen allergy sufferers might be augmented due to cross-reactivity in the overlapping flowering phases of mugwort and ragweed.
Remark: The burden may vary daily and in the course of a day – please consult the daily pollen load and our hourly forecasts such as the allergy risk! Please pay special attention to a possible burden during the night.
A burden may occur on occasion in other regions of Austria as well or might be increased in the concerned regions of Austria due to long distant transport of ragweed pollen and to the more progressed flower of ragweed in the East and South of Europe. The West of Austria is still a recommended region for ragweed pollen allergy sufferers.
Mugwort and ragweed pollen is the main aeroallergen within the forecasted period. Mugwort already burdened during the End of July. The main burden and the highest mugwort pollen concentrations are expected for mid of August in the whole of Austria. The mugwort pollen season will fade towards end of August. However, mugwort is more frequent and thus intense in pollination in the East of Austria.
Mugwort occurs more frequent at weed fields, fallow lands and dumps and thus its pollen has to be expected there. Mugwort pollen allergy sufferers could evade into higher altitudes. Hardly any burden is expected at a sea level of 1200 meters and above.
The grass pollen season fades during the forecasted time period. Low grass pollen concentrations will dominate.
Corn fields finish flowering during the beginning of August and should be avoided by grass pollen allergy sufferers. Intense pollination has to be expected in proximity to flowering fields due to the remarkable size of corn pollen.
Dock and plantain flower and may burden in addition.
Golden rod is flowering. This plant is insect pollinated and does not cause a noticeable widespread pollination, but might be of importance for sensitive persons with sensitization to composite plants (such as mugwort and ragweed) in direct contact. Canada golden rod is a neophyte of importance in Austria and is used as ornamental plant in bouquets.
What else: The pollen spectrum contains pollen from the nettle and the goosefoot family in addition, which is of a low allergological importance.
The burden from fungal spores is favored with hot and humid weather. Fungal spores occur in up to high concentrations in the air in the lowlands. We are in the period of the peak burden from fungal spores. The burden from fungal spores decreases with the sea level.
Responsible for the content:
pollenwarndienst.at and the Department of Oto-Rhino-Laryngology of the Medical University Vienna, Research group aerobiology and pollen information
Uwe E. Berger MBA und Mag. Dr. Katharina Bastl
medium-term forecast based on model and pollen data from Austria and surrounding countries
reprint and publication in parts or completely is permitted only quoting the source
weather data and today´s forecasts based synoptic data: ZAMG (Zentralanstalt für Meteorologie und Geodynamik)