Ok, if there is snow around the Flagstaff area, then can I go from Albuquerque to Phoenix and then I-10 to Pasadena? I mean, looking at the stretch that I will travel (Columbus -> St. Louis -> OKC -> Albuquerque -> Needles -> Pasadena), there is a potential for snow between Albuquerque and Needles.

So, via Phoenix to Pasadena may be my alternative?

Also, may be I can book the Hotels (if I have to feel better by planning ahead), may be I can book it in the first 4 cities of my trip and leave the Needles/Phoenix option open because it could change due to weather? Thanks