This is a very troublesome article that just came out

"Evidence of a tidal effect on the Polar Jet Stream" http://CliveBest.com/blog/?p=7278

> "The Spearman correlation coefficient calculated between all values of DA/DT and T(45) evaluates to 2.4%, which although small still deviates from zero (no correlation) by 3.7 $\sigma$ equating to a statistical significance of >99.7%."