After introducing MediaWiki train - European version, European Mid-day SWAT was moved to an earlier time. On Mondays it is now at the same time as Wikimedia Portals Update, see Deployments page.
Since Wikimedia Portals Update takes just a few minutes, and European Mid-day SWAT sometimes extends over an hour, and on Mondays Wikimedia Portals Update/European Mid-day SWAT are the first deployment of the day, the easiest solution would be to move Wikimedia Portals Update to 15-30-60 minutes earlier.
@Jdrewniak: do you agree?
If you agree, I'll update Deployments page/template. Just let me know how much earlier would you like to move the window.