One more: We ARE at the time of year where we have T-storms. When people make comments about ODD weather, I wonder where they've been in past years?
Adding to what Richard said... Just my two cents worth here:
It was a year ago last (this?) week that the huge flash flood came down through the Portal area and did all that damage to the road, also a flood flashed into Independence.. took out the Whitney Hatchery.
This time last year I was tracking the weather hourly for at least two weeks (I still have the spread sheet on it). Thunderstorm activity during this time of the year is not only NOT unusual.. it should pretty much be accepted as the norm and should be prepared for anytime anyone will be venturing out.
There is nothing ODD about the weather patterns as they are... and only preparation and knowledge will get you through.
It all goes back to doing your homework. Winter and High altitude aren't the only things you have to worry about when your going out there...