Weather report at www.weather.com/weather/today/Norden+CA+95724
current temp 35F, zero precipitation last 24 hours
Forecast:
today's high, 47F, 10% chance of precipitation
tonight's low, 28F, 10% chance of precipitation
tomorrow's high, 56F, 10% chance of precipitation.
Sounds like there should be no problem with the train making it over the pass.
A general thought: Don't rely on the "someones" and "somebodies" of this world. They will have you running around in circles like a headless chicken. Go to sources and get the facts directly from there. Most of the "someones" and "somebodies" running around with their jaws flapping are operating in a fact-free world.