Forecast

Changeable weather and fluctuating pollen load!

The extensive rainfall has increased the pollen count of hazel and alder finished. Now the blossoming of the ash. Thursday and Friday are the sunniest and warmest days, when moderate to high levels of ash pollen are possible. The weather forecast promises rain again on Saturday and Sunday. This will slow down the release of pollen and provide relief for allergy sufferers.

Ash trees have started to flower in the valleys of Vorarlberg. The local population has been greatly reduced in recent years due to disease and fungal infestation. However, as they are wind-pollinated and produce large amounts of pollen, they are still relevant for sensitised people.

The flowering of hazels and alders is over; only individual corkscrew hazels in parks and gardens can still provide a very localised pollen load. The catkins of the birch are still firmly closed. The birch is not expected to start flowering this weekend.

The fluffy catkins of the sal willow, commonly known as pussy willow, are also currently in bloom. Their pollen is classified as moderately allergenic. Allergy sufferers who are allergic to willow and poplar should not place the branches of these pre-Easter heralds of spring in their rooms.

The pollen spectrum includes maple, elm, yew and cypress plants have been detected. In the lowlands of Vorarlberg, the pollen load from these early bloomers is low to moderate.

From a current perspective, the data from our birch flowering readiness model indicates that this will be reached in mid-March.

Forecast from 2026-03-12

Note: The data shown here are model data for the expected start of flowering. For more detailed information on the expected pollen count, please refer to the text forecasts.