Weather informations
What a Desaster to find a decision :-(... I try to explain the weather forecasts:
Saturday
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We will have lots of clouds in the morning. But all models show a sunny window from 10 - 15 hour at the north side of the alps. Maybe check http://meteo.search.ch/cloud. If we have bad luck, a sort of "Lenti" will remain fix at any position. Probably not...
The frontal clouds arrive in the afternoon first with high (7000m), then middle layer (5000m). At the same time cold air will arrive. The stability will dissolve and strong valley wind will dominate.
- Wind at 2000m 14 hour about 10-15kn W to NW.
- Later and higher the wind is much stronger
If you check the thermal prognosis BEO you see, that the thermal top just arrives in a hight with wind. Ths could be the case at Grindelwald, Verbier.
Cloud base / thermal top 2200m - max 2500m (probably lower)
Pressure gradient rises from 5hp at noon to 10hp in the evening...
Sunday
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After the frontal system we will have some "Restwolken". They should disappear, especially at the west side of the swiss alps. But we will have very strong wind above 2500m (30kn).
Probably we will have a light inversion at cloud base. Together with a small Subsidence and Warmluftadvektion, the clouds should dry out. It can be, that the conditions below that layer are Ok for flying.
Where to go???
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Verbier:
Only local flights, because of clouds, wind, valley wind...
Wallis, Tessin:
Northwind (the snow will strengthen the downwinds)
Kandersteg
Difficult with low cloud base and strong velley wind.
Grindelwald
Would be one of the possibilities. Maybe it works for take off, flights to Burg and back would be possible.
Meiringen
Windy, local flying possible
Adelboden
Local flying possible, but Westerly in altitude and valley winds in lower level...
Decision
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After many phone calls with the locals, we decide to cancel the Swiss League Cup and make Regio-Flights at Interlaken and Verbier.
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