By Ollie Millin Weather
LONG RANGE-WINTER 2014/2015 Good evening and welcome to my first winter post of 2014! In today’s post I will be talking about Eurasian Snow Cover/Advance in October (SAI) and how this correlates to winter, the OPI Index, solar sunspots and some early stratosphere warming!
So, first up I will go to a subject that has been floating around social media and the media in general: The OPI. You may be thinking: what is the OPI? The OPI is short for the October Pattern Index, it is a numerical summary for the northern hemispheric conditions during October! A lot of research has gone into this tool and a really good correlation (when looking back at previous data) has been found! When the OPI is really negative overall, there is a much stronger likelihood that winter will be colder and harsher; this is due to the increased likelihood of a negative AO (probability that cold air will be displaced from the pole). Please click on the following link to read more http://olliemillinweather.wordpress.com/long-range/
By Ryan Saunby
Update on how things have progressed
Right, so its the beginning of November and time to have another look on how things are progressing.
We was looking for rapid snow cover growth during October and that is what we got. SAI figures suggest this is one of the strongest SAI’s we have seen.
Furthermore October had the second largest Eurasian snowpack on record.
To read more, please click on the following link http://ukweatherwatcher.wordpress.com/