Sunday, November 20, 2011

18z GFS Renders 12z GFS Arctic Oscillation Forecast Void

The 12z GFS, which had been forecasting the Arctic Oscillation to extend its raging positive phase for the Arctic Oscillation, has been rendered void by the new 18z GFS as the 18z GFS has resumed the trend of nosediving the AO. You can see the marked areas of the 12z GFS and 18z GFS. We will continue watching the forecast, but this is the development as we see it right now.


Mike Paulocsak said...

Hello Andrew.Does a "NOSEDIVING AO"mean that the weather pattern will become snowy?

Andrew said...

The Arctic Oscillation is much like the NAO- When it goes negative, there is an increased chance for cool weather and yes, possibly some snow, in the US.