Issued 12th of April 2021
Situation and medium-term forecast
Pollination is limited – a reduction of allergenic burden can be expected!
A strong cold front reaches Austria which causes low temperatures as well as rain or snow for the first half of the week. These weather conditions will cause a reduced burden for pollen allergy sufferers since pollen concentrations will not exceed moderate levels.
Note: Pollen allergy sufferers may react differently to the current situation. While some will profit and feel a relief/hardly a burden after the decrease of the peak, others will still suffer from the prevailing pollen concentrations.
After the first peak of the birch pollination period the forecasted weather conditions will lead to reduced pollination during the first half of the week. The flowering potential of most of the plants has not been exhausted yet, therefore a rapid increase in pollen concentrations has to be expected once the weather conditions are more favorable. For the upcoming days low to moderate burden can be expected, depending on the location.
Furthermore, hornbeam and hop hornbeam are flowering as well as some oak trees. Pollen of these species may increase allergenic burden for birch pollen allergy sufferers due to cross-reaction.
Ash flowers, but it has already exceeded its peak in the lowlands and therefore burden will reach moderate levels at best.
In urban areas an increasing number of plane trees are starting to flower. In close vicinity to avenues of plane trees allergenic burden has to be expected already.
Pollen of alder and hazel are only recorded occasionally. Therefore, concentrations rarely reach the threshold for causing allergenic burden.
What else: The pollen spectrum contains pollen from cypresses and yews, poplar, maple, willow, and larch in addition, which is of a low allergological importance.
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, Mag. Maximilian Bastl PhD and Mag. Dr. Johannes Bouchal
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)