If the prediction for Thursday evening, 3-26-15, is accurate, Mt Pinos/Lockwood Valley and vicinity looks, at the time of this post, to be as good as it gets...
http://cleardarksky.com/c/MtPinoskey.html?1
If it holds, you'd probably have sub second arc seeing in combo with excellent transparency. I bet Floyd Blue could really punch the envelope on that one! The moon would set around midnight or thereabouts and there's a bubble of high pressure over the mountain keeping the air dry and stable. That combo in the clock doesn't happen very often...
http://cleardarksky.com/c/MtPinoskey.html?1
If it holds, you'd probably have sub second arc seeing in combo with excellent transparency. I bet Floyd Blue could really punch the envelope on that one! The moon would set around midnight or thereabouts and there's a bubble of high pressure over the mountain keeping the air dry and stable. That combo in the clock doesn't happen very often...