Not to mention it's easy to run a sneaky positive temp mean in a nino if you choke off the arctic source and repeatedly get rain or cloudy days. The sensible effect is cool bc days are in that 50 degree range but if nights are only 40-45 bc of clouds or rain you can stack up loads of +4-8 days but never "torch"Not really. That map is taking into account what will probably be an overall quite mild December. Also with the active STJ developing, you can expect to see many days this winter that sees highs a couple degrees below average, but clouds and moisture holds lows up a good bit above normal…. 2019-2020 is a great example of that.