Thanks for the response on the stay tension. When I put the jib up, everything made sense. Lots of clever designs on these boats..
Regarding the Tornado, Park County Colorado has had one recorded Tornado since they started keeping records in about 1950 and it happened to be this one. They are rare because its high mountain country (the lake is at 8600 feet). The forcast that day was for 5-10 mph winds and 30% chance of thunderstorms which is actually on the "calm" side for this lake.
I set out about noon in sunny skys (motoring with the 1990 Honda 8 hp outboard), put up the sails about 1 PM and about 2 PM, saw what looked like a big dust storm at the end of the lake - but not on the lake. Looked big enough that I decided to drop the sails and motor. By the time I had the sails dropped, this thing had moved onto the lake and was forming the funnel. I tried to start the outboard but was getting minor shocks- sparking - tingling on the outboard and it would just sputter and not start. I beleive the charge in the air (lightning was going on) was messing with the electronic ignition. For a long time, Im sitting there trying to start the motor knowing that condtions were ripe for a lightning strike but no choice since this big ass and getting bigger ass tornado was bearing down on me. But.. I kept taking pictures and the one in the link was during a real "come to jesus" time period when I figured I was going to have to go below, tie down the hatch and ride it out.
Finally - probably sometime close to when the picture was taken, I got the outboard started and headed South as I thought the Tornado was going North. After some time, it looked like I had been going the wrong direction and I dd a U turn and headed back North. The Tornado kept going South and went on to land at a fishing/picknic area and threw over some trucks/campers with people in them and blew out some windows. There were some minor injuries but that was about it.
I then got rained and hailed on motoring back in, got soaking wet and am just now getting over the cold I got.
It really scared the crap out of me

and Im looking forward to some time on the Hobie cat staying a little closer to shore.