At 5:46, the surface of the lake was like a mirror...
At 5:50 — the "actual" sunrise time — the lake began to stir...
One minute later — at 5:51 — there were long swooping waves, criss-crossed with tiny ripples...
In half a minute, as the sun peeked over the line, the effect was distinctly more dramatic...
And at 5:53, it looked like this...