Issued 25th of January 2021
Situation and medium-term forecast
In eastern Austria, the hazel pollen season will soon start!
Except for Carinthia, the forecasts predict rainy and snowy weather for this week. These unfavourable conditions will lead to reduced amounts of pollen in the air.
The majority of hazel bushes and trees have not yet reached readiness to flower. But at climatically favoured sites (southern exposure, city centres, foehn regions) in Burgenland, Lower Austria, and Vienna, first hazels may start to flower. Pollen allergy sufferers may already experience allergic burden in the close vicinity of these plants. On days with strong foehn influence, long-distance transport of hazel pollen from our southern neighbouring countries can be expected, resulting in low to moderate allergenic burden in the affected areas, not only during the day but also during the night.
Note: The immune system of a pollen allergy sufferer may be more susceptible at the start of the pollen season. Birch pollen allergy sufferers may be potentially concerned by the hazel and Spaeth’s alder pollination due to cross-reaction.
In the urban areas of Styria, the Spaeth’s alders continue flowering. Sensitive pollen allergy sufferers may still experience allergenic burden in close vicinity to such trees. In the rest of Austria, the Spaeth’s alder already ceased flowering.
Members of the cypress family started flowering. 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|
Forecast from 25.01.2021
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. Start of flowering is not to be equated with the beginning of the pollen season. When the start of flowering is achieved, the majority of the plants have the potential to 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)