How to display the slopes that only facing west using ArcGIS for Desktop?

Here is what I am struggling with ...

In ArcGIS for Desktop I have to Derive and symbolise areas considered susceptible to avalanche risk based on the following simple rules:

1. areas with a slope between 20 and 45 degrees,


2. facing towards the prevailing wind (west in this case)


3. not in forested areas.

By far I manage to display the Slopes and Aspects using tools from Spatial Analyst.

But how I can display the slopes in 3 different categories where they all facing west?

Photo attached shows what I manage to come up with

Any help will be much appreciate! thx