Issued 8th of March 2021
Situation and medium-term forecast
In the Alps, alder and hazel are flowering, in the Austrian lowlands, their catkins are wilting!
In the Austrian lowlands, except for the Carinthian valleys, the alders have released most of their pollen. Here, only a low to moderate allergenic burden is to be expected for this week. In the Alps at higher elevations, the alders have recently started flowering. Moderate to high pollen concentrations may here be reached during sunny and dry weather conditions.
In the Austrian lowlands, the hazel pollen concentrations continue to decline. In higher altitudes, they are still flowering. A low to moderate allergenic burden may occur in the coming days all over Austria. The corkscrew hazel, an ornamental bush commonly cultivated in gardens and parks, is currently in full bloom. Pollen allergy sufferers sensitized to hazel should avoid this plant’s close vicinity, because here a high allergenic burden may reach a high level.
A harbringer of spring are the flowering pussy willows. Their flowers and pollen are an important food source for the bees. Only very few pollen allergy sufferers react to willow pollen.
The pollen of the following plants is also currently airborne in Austria: elm, maple, poplar, 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 08.03.2021
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)