Mindful of their corporate liability many airfields no longer report runway Mu meter readings but only pass on pilot reports. Most snow/ice excursions these days happen because the first 1/3 of the runway is fine, having already hosted many landings today. However the upwind end can remain as icy as hell, well into a period of operations as nobody has been that far down the runway today. In this case it looks more likely they found a whole lot of impingement drag on one side, probably from slush/snow lurking on the runway margins. Landing on the centreline pays dividends.