Your groundspeed increases to 110 kts in a sweeping downwind turn. Absolutely nothing else happens (disregarding any wind gradient affecting the lower wing in the turn, and assuming the odd visual effects at such low level don't confuse you into reducing your airspeed and possibly stalling the aeroplane).
I wondered when someone would answer ... You're right of course, but it was the wind gradient I was alluding too. If you've climbed out of it then great, but with a 50 knot windspeed the gradient will be steep and turning downwind whilst still low enough to be in it could be .... interesting?
SS