[sryanbruen]

This Polar Vortex doesn't give it a rest.



GFS forecasting another wave of anomalous positive AO to propagate close to the troposphere in the foreseeable future but staying around the lower strat on this particular forecast. Nevertheless, no end in sight to the zonal westerlies!



Remember that this is, climatologically speaking, usually the time of year of the weakening phase of the Polar Vortex. Mean date for the Polar Vortex to go into summer hibernation is April 15th with extreme examples as early as near the start of March (2016) and as late as near mid-May (1981). We could be waiting a while yet.

This 2019-20 season is a real turn up for the books with its relentlessly strong Polar Vortex.

[PukkaStukka]

Originally Posted by sryanbruen

Mean date for the Polar Vortex to go into summer hibernation is April 15th with extreme examples as early as near the start of March (2016) and as late as near mid-May (1981). We could be waiting a while yet.

What is the impact on or implications for summer weather if the hibernation is considerably later than the mean?