Google Webmaster Tools is usually the best friend for any webmaster trying to keep informed, but users have noticed the normally up-to-date service has not been updated in over a week.
The problem was noted by Search Engine Land last week and has been the main topic of conversation on the Webmaster Tools forums all weekend, but so far Google has no response.
The closest thing we have to a response comes from forum user ‘Kai Z’, who wrote “Known issue. […] Give it a few days to update/ return”. Normally forum posts like this wouldn’t carry much weight but it seems notable that Google webmaster trends analyst John Mueller marked this response as ‘best answer’. Naturally this has caused quite a bit of speculation but could potentially be meaningless.
The outage seems to line up with a similar issue in Google Analytics. Many users reported data in analytics was missing for Monday February 9, but Google that problem received a prompt response from Google on its product forums: “We’re sorry for our unusually bad case of the Mondays. We’ve fixed the issue and no data was lost. Analytics users should start seeing any missed [data] soon.”
Most likely the problem will be resolved fairly quickly, but the lack of transparency from Google on what is causing the lack of updating has caused some concern within the SEO community.