Well, for the nerds that like to look at data. Warning, this is a full armchair in home office at 23°C mental onanism exercise.
Guys were found near the summit of the TĂȘte Blanche, the IT/CH border. Not at the summit, but quite probably above 3â000 m above sea level. The map below is from meteosuisse, triangles are stations that measure precipitation, circles are full ones that measure wind, temp, sun radiation, etc. So, there is no meteo station nearby. Zermatt and EvolĂšne are relatively far away and both below 2â000m.
Gorgergrat station is even farther away, but itâs at 3â129 meters above sea level. I guess it could be a good proxy of what happened above 3â000m last weekend. Temperature was around -10°C in the night from Saturday to Sunday.
What is really interesting is the wind. Before the weekend, between 10-30 kmh, that cool mountain breeze. During the night from from Friday to Saturday it gained strength, and reached 60 kmh during the first hours of Saturday. It changed direction, slowed down to 20 kmh at 9h00 and then increased to 1 second long gusts at 128 kmh at 15h00. Wind kept above 100 kmh until noon of Sunday. Then, back to that cool mountain breeze.
Itâs feasible to assume -10°C, wind around 100 kmh, thatâs a wind chill of -25°C according to this online calculator. It may have been even colder or wind blowing stronger, no way to know. Also, going up the mountain leads to sweating, which is not good survival in the cold. Only sure thing is that the outcome of the natural experiment is that digging a hole was not that useful.
@Tom1234, I guess anyone can make the mental experiment of riding on the roof of a car at 100+kmh and trying to unpack a 1.5x1.5m tarp, then try to get inside it. Are you just blow by the wind while trying to hold the tarp? Are your freezing hands inside gloves capable to enough to hold the tarp while the whiteout makes hard to see your own hands?. FSS, letâs assume you and your buddies are super strong and can hold the tarp, is the tarp sheared to pieces by the wind? Just look at that wind plot once again and realize successfully unpacking and getting inside a wind shelter was a matter of minutes. If the decision was not taken at the right time, there was not much left to do after the wind picked up more speed. Sometimes things get that ugly that the only way to survive is not being there in first place.
So, awful conditions, poor guys. Itâs sad that the decision process did not lead to the right answer.