There have been huge swings in signal strengths here the last few days again. There have been periods of especially good conditions to Mt. Sutro. The previously troublesome KBCW was SNR 31 dB this afternoon and KPIX was SNR 28 dB. KGO was SNR 31 dB for several hours. The really good conditions were to Salinas again. I've attached a composite spectrum analyzer image showing KSBW towering above all the other VHF stations. Even KCBA was equal to or better than Walnut Grove. The red line is the minimum signal strength of the pilot carrier necessary for the station to decode if the rest of the signal is flat.
A couple hours later KCBA was falling off the cliff.