Need Help with a Route

Be aware that Tehachapi Pass on 58 into Bakersfield could be closed for weather. Ditto the Grape Vine Pass on I5 north of LA. You could always go through LA to 101 and north. One crossing back to I5 would be route 46.

I-10 would have the least amount of snow....anything else higher more of a chance especially crossing the Sierra's. Now the warning.....El Nino is 90% chance of occurring probably starting in January 2016....That means a lot of rain for California, Arizona....epic amounts up to 50 inches. This is going to make for some rough travel so be prepared to hold up if necessary.

Be flexible. There are two main routes across Texas east to west. I-20 across north central TX merging with I-10 out toward El Paso. And I-10 across south Texas. I-20 would be the shorter route. We don't get a lot of ice/snow in this area. But it does happen. And it does sometimes happen in December. The good news is that the highways are rarely a problem longer than 2-3 days.

But even I-10 farther south can also get its share of ice/snow, especially out west of I-35. Once again rarely a problem more than 2-3 days.

But there have been many years when you could go across I-40 thru OKC and the TX panhandle in Dec and not see snow.

Just have to keep up with the weather forecast and be prepared for unplanned stop overs and/or route changes. You could start out on a shorter more northerly route and drop to the south as needed. There are lots of options at getting from one interstate down to the next one.