Frankly I'm not optimistic about this, but I am willing to try an antenna to get local news and cut the cable. I live in a deep valley surrounded by treed hills 30 miles from the nearest transmitter. I could mount a mast on the one-story roof, but probably no higher than about 10 feet (so perhaps 25 feet total). An indoor antenna is out - we have a metal roof.
The tvfool site gives me no green and 2 yellow stations and 4 red stations, ranging from -67.8 to -95.2 dBm and 23.1 to -3.7 NM. The two yellow are in the same direction, the other 4 in the exact opposite direction (we live between two small cities, neither of which has all four networks).
Given that info, and that a small mast is probably the limit for me, any suggestions on a decent antenna?