[mcfunk]

This average increase mark is obviously very useful and important, but there's another dimension to add on to that when it comes to temperature trends.

In the Twin Cities, for instance, the altered jet stream has greatly increased both colder-than-usual and hotter-than-usual patterns that stick around for longer. So although our average increase looks low, for instance this summer espeially we are having unusually hot streaks followed by unusually cold streaks (and the winters have been very bad over the past several years, with two 'polar vortex' years due to arctic air masses displacing on us, which is greatly impacted by climate change and arctic warming).

TL;DR I'd be very interested to look at the data shifts in temperature more deeply and see which areas are impacted by both hotter AND colder weather, which wouldn't show up in an examination of averages.

[cknoxrun]

I agree, in my city (Edmonton), the weather forecast even 1 day in advance has effectively become useless this summer. It has been record breaking in terms of the amount/days of rain, and I can say with confidence on at least half of those days rain was not in the forecast.

The system has become completely unstable to the point where weather models no longer seem to be able to output accurate results.

[jihadjihad]

I think the key concept is variance -- the mean might change a little but if the variance changes a lot, there will be "extreme" events with more regularity.