Issued 4th of March 2021
Situation and medium-term forecast
Cold weather and rainfalls reduce the allergenic burden!
Moderate to high pollen concentrations were registered during this week. On Friday, a cold weather front will arrive with rainfalls in Austria. These weather conditions will cause a significant reduction of airborne pollen concentrations.
In the Danube valley, the Pannonian lowlands, the Graz basin, and the alpine valleys, the alder peak pollination period has been reached. The forecasted rainfalls will wash the air clean of airborne pollen. In higher elevations, alder is now reaching flower readiness. For this weekend, a low to moderate pollen concentrations has to be expected on sunny days.
At higher elevations and in the valleys of Carinthia, the hazels have passed their pollen release peak, and concentrations of airborne hazel pollen are declining.In the rest of Austria, only low pollen concentrations registered. The reason for this is, the hazels have passed their main pollination period. A low to moderate allergenic burden may still be reached.
The pollen of the following plants is also currently airborne in Austria: elm, poplar, willow, cypresses, and yews. Their pollen is only of minor allergological importance.
The forecasted start date of the birch pollen season is calculated based on forecast models. Due to the uncertainty of long-term temperature forecasts, birch’s actual flowering start can still vary. The predictions become more accurate as the season approaches.
|We expect the readiness to flower for birch in||on|
Forecast from 04.03.2021
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)