After the early Pac firehose, we did finally get a mechanism in place long enough to inject some polar air into our source region- a favorable WPO/EPO and probably some impacts from the SWE. Since that time, the longwave pattern has only tickled this region briefly with any legit cold air. Just more bad luck, or failing for a different reason, but what I see is a pretty classic NINA pattern that is doing the screwing now, while at the same time we have some untimely relaxation in the HL blocking.