I had a good sap run on Thursday night and Friday morning before the freeze set in. It was right at 3% sugar. Sunday did not run a much as Thursday.
I initailly had strange results with my beer hydrometer initially. It is calibrated at 70F. I tested sap from my tank at 32F. It read 0.5% sugar. I thought at lower temperatures it was supposed to subtract from your reading not add to the reading. After it warmed up in the house to room temperature it read 3%. It didn't seem like much water evaporated out of my cup because it still nearly filled my hydrometer sampling holder.
This was an exciting weekend for me as I made my first syrup ever. The first two batches were pretty light in color and tasted great!