I'm planning a roadtrip with some friends in January from Los Angeles to Austin, TX. What kind of weather and road conditions can we expect in January? The map says were driving on I-5 south, I-8 east, I-10 east, US-290 east. Do we need chains for snow? Are we going to be delayed by flash flooding? How many days do we need to give ourselves to get there. Any information would be helpful thanx!!