Issued 17th of December 2018
Situation and medium-term forecast
First preview on the pollen season 2019 – Spaeth´s alder does not flower yet!
A special alder species, Spaeth´s alder, shows still closed catkins and will start flowering probably next week in some places and will cause a first local burden. This species is known for its flower around Christmas time and occurs only where it was planted.
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, the actual flowering start of hazel and alder can still vary. The forecasts become more accurate as the season approaches.
Currently, there is no reason to worry: hardly any pollen is in the air, because a widespread pollination is not taking place. At most, the first low burden from hazel pollen might be recorded in foehn areas before the mid of January.
|We expect the readiness to flower for hazel in||on|
Forecast from 17.12.2018
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 und Mag. Dr. Katharina Bastl
medium-term forecast based on model and pollen data from Austria and surrounding countries
weather data and today´s forecasts based synoptic data: ZAMG (Zentralanstalt für Meteorologie und Geodynamik)