Stay focused and watch for recent slide and wind activity as you drive to the trailhead.
Natural avalanche activity is a sure sign of instability. Note what aspect the slide occurred on, its slope angle and if you can, figure out the weak layer that failed.
Take note of all wind activity:
Watch for wind activity off ridges and across the highway which indicate possible slab formation. Next Section: At the Trailhead
Next Section: At the Trailhead