Hazelnut, Basel, 3 January 2012 (photo: MeteoSwiss pollen forecasts)
BERN, SWITZERLAND – Massive amounts of snow cover the Jura and Alps, but on the Lake Geneva region plains the weather has been clement, and for hay fever sufferers that translates into the hazelnut trees budding. Where the air is dry, pollen is already being released.
The amounts are small but measurable near Geneva, MeteoSwiss’s pollen map shows, but by tomorrow in Ticino, with flowering already occurring Thursday 12 January, the rating will go up to “average”, as they have done in some very locally confined areas, such as Buchs in eastern Switzerland.
Flowering of troublesome pollen-bearing plants has been happening earlier since the 1990s, says the national weather service but traditionally this happens anywhere from December to March depending on the combination of a number of factors. Hazelnuts are now forecast to flower 24 January in Geneva and Lausanne, a full two weeks earlier than the average.
MeteoSwiss is now offering a daily pollen forecasting service, in French, German and Italian, with maps showing the daily situation for the main varieties that cause problems. A smart-phone application is free of charge.
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News story, GenevaLunch, 12 January 2012.
Tags: flowering, forecasts, Geneva, hazelnuts, Lausanne, Pollen, Swiss national weather service, weather