Issued 25th of February 2021
Situation and medium-term forecast
Hazel and alder continue flowering!
In the Austrian lowlands (except Carinthia), the hazel pollen season peak has passed, and the amount of airborne hazel pollen is decreasing. Pollen allergy sufferers reacting to hazel will have to expect a low to moderate allergenic burden. In moderate elevations of the Alps and the Bohemian Massif, hazel is now reaching flower readiness and pollen allergy sufferers should expect in these regions a low to moderate allergenic burden.
Over the weekend, the main pollination period of alder will be reached in lowlands and alpine valleys. Pollen concentrations may reach moderate to high levels in these areas. Only low allergenic burden has to be expected at higher elevations, because here the alder catkins have not yet reached their flower readiness.
Note: Pollination from alder and hazel is favoured especially during sunny periods. Regions with frequent occurrence of hazel (edges of the forests) and alder (river-meadows) should be avoided when taking a walk.
The FFP2 face masks, which are at the moment obligatory for using public transportation and shopping groceries in Austria, are also very useful for pollen allergy sufferers. If worn correctly, the face masks provide protection against pollen and keep it from entering the respiratory system.
The pollen of the following plants is also currently airborne in Austria: poplar, willow, cypresses and yews. Their pollen is only of minor allergological importance.
The forecasted start date of the hazel and alder pollen season is calculated based on forecast models. Due to the uncertainty of long-term temperature forecasts, hazel’s and alder’s actual flowering start can still vary. The predictions become more accurate as the season approaches.
|We expect the readiness to flower for alder and hazel in||on|
|Vienna||ready to flower|
|Eisenstadt||ready to flower|
|St. Pölten||ready to flower|
|Linz||ready to flower|
|Salzburg||ready to flower|
|Innsbruck||ready to flower|
|Bregenz||ready to flower|
|Graz||ready to flower|
|Bolzano||ready to flower|
|Munich||ready to flower|
Forecast from 25.02.2021
Note: The model results give an indication of the expected start of flowering, based on information provided by local pollen warning services with direct reference to the local situation. Readiness to flowering is not equal to the beginning of the pollen season. When the start of flowering is achieved, most of the plants can release pollen, but only when weather conditions are favourable.
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)