Issued on 28 May 2025
Unsettled weather, fluctuating pollen load!
It remains changeable and unstable. Rain showers give pollen allergy sufferers a brief respite. However, as soon as the sun comes out again and the flowers dry out, pollen concentrations rise again. Grasses are the main allergen at the moment and people who are sensitised to them must be prepared for fluctuating levels.
In the meadows and along the roadsides, couch grass, grass grass, smooth oat, foxtail and bluegrass are currently in full bloom. Rye has also started to flower. As rye pollen is relatively large and heavy, it is mainly found in the vicinity of rye fields.
In the meadow aspect, the flowering dock and plantain can intensify the pollution.
The white flakes that are currently increasingly visible in the air are poplar cotton wool. It cannot cause allergic symptoms as it is not pollen but poplar seeds and seed hairs. As the flight of poplar cotton wool usually coincides with the flowering of grasses, symptoms are often wrongly attributed to poplar.
In the Lower Austrian Alps, the green alders are in bloom. They have already passed the peak of their bloom and are largely a nuisance in their alpine distribution area. In sunny phases and when there is a suitable wind current, green alder pollen can be transported to the lowlands and cause additional pollution there.
The flowering of green alder is progressing in the mountainous south of Lower Austria. This is also where the main exposure to this late-flowering alder species is expected. When the sun is shining and the wind is blowing in the right direction, relevant amounts of pollen can be transported to the lowlands and cause pollution there.
Other types of pollen in the ambient air: nettle, umbellifers, dogwood, elder, pine, robinia, roses, horse chestnut, rhododendron, sour grasses, wine and cypress. These are of minor allergological importance.
Responsible for the content
AZ Pollenresearch GmbH im Auftrag der Niederösterreichischen Landesregierung, Gruppe Gesundheit und Soziales, Abteilung Umwelthygiene.
Dr. rer. nat. Johannes M. Bouchal, Lukas Dirr, MSc und Mag. Sabine Kottik.
Wetterdaten und Prognosen basierend auf synoptischen Daten:
GeoSphere Austria, Bundesanstalt für Geologie, Geophysik, Klimatologie und Meteorologie (ehemals ZAMG).
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