The wx avoidance contingency procedure when beyond 10 nm from the awy centerline looks complicated, but it is something like:
All airplanes flying north of wx descend 300 ft, westboud or eastbound. All airplanes flying to the south, climb 300 ft.
In this manner, two airplanes in opposite direction will maintain 1000 ft separation. One airplane deviating and another clear of wx along its own nearby route in opposite crossing directions will be 1300 or 700 ft separated from you. And it will be 300 ft separated from a traffic at the same level in a converging route in same direction, or opposite at a non std level. Better than nothing...
And all the time you are considered to be at your original FL.
Again, I hate those
smileys...