So here we are, 9:30 on the night before Christmas. Not a creature is stirring - except for the Christmas storm that is getting closer and closer to the Northwest! But will that storm bring a white Christmas to Portland?
The latest computer model updates have recently come in, and they are largely unchanged - which means my forecast of rain, and only rain, in Portland for tomorrow afternoon still looks pretty reliable. Of course, above 1,000 feet, we're still talking snow - and it will accumulate! Up to 4 inches of snow may fall in the highest West Hills locales by mid-day Wednesday.
There is always that outside chance that the snow level will be lower than 1,000 feet. But with each successive computer-model run coming in unchanged - and still indicating just rain for the valley floor - the chance of a huge shift is getting smaller and smaller. There will probably be some snow mixing in with the rain showers by Wednesday. But steady and accumulating snow on the valley floor is looking increasingly unlikely with this system.