Issued 13th of July 2020
Situation and medium-term forecast
Rainfalls arrive in the middle of the week resulting in a reduced allergenic burden!
On Saturday, the airborne pollen and fungal spore loads were significantly reduced by the rainfalls all over Austria. The start of this week will be sunny again causing a rise in pollen and fungal spore concentrations. At the middle of this week, the rainfalls return and deliver short-term relief to pollen and spore allergy sufferers.
At higher elevations, the flowering of the grasses is now in full swing resulting in moderate to high pollen concentrations at the start of this week. In the lowlands and valleys, the peak grass pollen season has passed and the allergenic burden will reach only low to moderate levels. At the middle of the week, the predicted rainfalls will lower the grass pollen concentrations and its accompanying burden. Currently, flowering yellow oat grass, Bermuda grass, cock’s-foot grass, ryegrass, timothy and meadow-grass can be encountered. Grass pollen allergy sufferers should avoid flowering meadows and green spaces because here the local burden is higher. Dock and plantain are flowering and may cause additional allergenic burden in the vicinity of meadows.
Cornfields are in flower and should be avoided by grass pollen allergy sufferers. Intense pollination has to be expected in proximity to flowering fields due to the remarkable size of corn pollen.
We expect the start of the mugwort pollen season for mid to end of July depending on region and development.
Only in the south-east of Styria sweet chestnut remains flowering. Here, its pollen may be of relevance to birch pollen allergy sufferers due to possible cross-reactions. In the rest of Austria, it has ceased flowering.
Besides the main aeroallergens, the following pollen types were registered in the pollen spectrum: lime tree, members of the nettle and the goosefoot family. Their pollen is only of low allergenic relevance.
The humid weather conditions promote fungal spore production and release. For the start of this working week moderate to high fungal spore burden can be expected. The predicted rainfalls in the middle of the week will decrease the allergenic burden. Fungal spore concentrations are decreasing with the altitude.
|We expect the readiness to flower for grasses in||on|
|Vienna||ready to flower|
|Eisenstadt||ready to flower|
|St. Pölten||ready to flower|
|Linz||ready to flower|
|Salzburg||ready to flower|
|Innsbruck||ready to flower|
|Bregenz||ready to flower|
|Graz||ready to flower|
|Klagenfurt||ready to flower|
|Bolzano||ready to flower|
|Munich||ready to flower|
Forecast from 13.07.2020
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. Katharina Bastl
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)