Lost control twice now, what happened?

It's possible the trailer tires don't have enough tread depth to clear the water in certain conditions. If the tires on one side of the trailer lose traction before the tires on the other side it can cause the trailer to move sideways.

There is a big difference between DOT legal tread depth and enough tread depth for heavy rain.

 

Unless you pull tankers. Then high crosswinds are just something you see happening to box-pullers.

 

And curtian siders, covered wagons, congas etc.

I once used 4 straps every two feet in Lubbock one spring storm on my ravens. 50 dollars in tarp cords. Then broke out the rope and started tying. About roughly 200 feet worth. It finally snugged that tarp down. (Ravens covered wagon) Unroll rope at one end (Front corner) start through all holes and reach the back and tie one time. Add more as needed.

 

Maybe trailer was lighter on the Drives than trailer? Sometimes, usually in the beginning of summer, oil from tires wearing on the road, comes up to the surface, Due to warmer weather/ sun hitting the road. Add a little bit of water, and it’s an oil slick!!!

 

I think it was your drives breaking loose.

Even coasting down a slight decline there is resistance from the drive train plus the momentum of the trailer pushing on you. Sometimes it doesn't take much.

 

Really, you don't know what your tires look like??
I have lots of times hit a spot in the road that made it feel like I had broke loose, when nothing had, but you could be hydroplaning just a little too.

 

Didnt see it asked anywhere, are you running duals or super singles, just curious.

 

Hydroplaning.

 

I'll second ruts worn into the road by heavy trucks. That always makes me think I'm getting squirrely and about to wreck.

 

I rarely move my fifth wheel forward and have never had the wondering front end syndrome. My fifth wheel stays over the rear axle 90% of the time.