The DeSart & Holbrook model published an updated forecast of the election outcome. The model currently forecasts a major vote share of 58.5% for Clinton, and 41.5% for Trump in Washington.
Putting the results in context
As any other method, models are subject to bias. Hence, you should not focus too much on the results of a single econometric model. At least, one should check how a model's results compare to benchmark forecasts.
Results compared to the combined PollyVote prediction
The most recent PollyVote anticipates Clinton to gain 58.0% of the two-party vote in Washington. PollyVote currently predicts Clinton to gain 0.5 percentage points less compared to the results of the DeSart & Holbrook model.