The Portland radio board is reporting that KKXA-1520 in Snohomish has been running 20,000 watts non-directional 24/7, and will continue to do so until sometime in the Spring.
I haven't seen any confirmation of this, but the Portland person claims he got the information from the owner of the station.
If true, it would certainly explain the excellent reception in locations supposedly in a Null in their relevant published directional pattern.