Spinning Cycle Squeaking

heavy rain eastern foothills and Alps - again extreme rainfall in parts of Vorarlberg in Bregenz Evening

A low has moved since last Thursday from Genoa to the Adriatic Sea to the northeast (see pictures below). A delicate Conditions with respect to precipitation, not only in Switzerland but in many parts of Central and Eastern Europe in particular (depending on the exact trajectory and activity of the lows). The track of the downs was already in 1891 by William Jacob van Bebber documented and received the designation "5b" (the original Vb). Accordingly, this weather is still referred to as the 5b position.

floor pressure map with fronts, the classic track of the surface low-5b
is beautiful recognizable. Source: German Weather Service rain

Yesterday it first, especially on the Southern Alps and in the Grisons, the wind shift to northwest, the rain moved in the evening and at night to become one of the central and eastern foothills. Due to the amount of flow of incoming cold air formed mainly in the easternmost strong thunderstorms, which were reinforced at the first pre-Alpine chain. It spreads fell 40 to 60 mm rain, occasionally, there were over 100 mm.

the basis of the total precipitation from the radar data is the focus of the fallout from the fabrics / SG on the Linthebene to the northernmost part of the canton of Glarus found:

24-hour precipitation derived from radar data
data: MeteoSwiss, Graphics: GIN-information platform

on the weather station Bilten / GL fell within 12 hours 87 mm rain (Source: Meteocentrale ). The flow of incoming cold air, snow levels dropped to 2,000 meters. Further details can be found in the Report of MeteoSwiss .

was feared Like neighboring Vorarlberg most affected by the rainfall. For the greater Bregenz, this was the fourth event of heavy rain within 14 days (see last blog entry ).

This time, the precipitation was more extensive scale, but significantly affected were the lower Rhine Valley and the Bregenzerwald. Within 24 hours were quite common in these regions, 100 mm rain, occasionally there were 130 to 160 mm. The greatest 24 hour total was measured at 166 mm on Bödele, 1150 m above Dornbirn:

course of precipitation (purple), hours total (blue)
and temperature (orange) at the weather station Bödele above
of Dornbirn . Source: Vorarlberg, water

At the station Schönbach in Bregenzerwald were only 50 mm of rain within an hour, a total were totalized 138 mm. Both of those regions are among the wettest in Vorarlberg. In the long term average fall here each year 2100 to almost 2400 mm of rain. Even in Switzerland there are areas with similar annual totals. These are most likely from Einsiedeln Alpthal south of the region associated with high Ybrig to Muotathal and in Alpstein (Schwägalp).