Sunday, August 12, 2012

Transformation into Positive PDO May Be Occurring
A difference in temperature anomalies between June and July shows a cooling pattern now occurring in portions of the Northern Pacific, as well as a warming trend being observed on the Canadian and Alaskan coast, typical to what would be seen in a positive PDO.
A warm phase, or positive PDO, is characterized by a cool North Pacific, as well as a warm coast of western Canada and southern Alaska. Also of interest is the warm anomalies in the Equatorial region and ENSO monitoring area. That said, it can be said that a positive PDO has a correlation with El Nino's. That does not mean that every El Nino has a positive PDO, but typically, they can occur together.
On the other hand, a cool phase of the PDO contains warm temperature anomalies spread across the North Pacific, as well as a cool Gulf of Alaska coast. Additionally, cool temperature anomalies are found in the ENSO monitoring area, showing a correlation between a negative PDO and La Nina.

A positive PDO typically brings about a warm and dry spell in the Northwest, which indicates a ridge of high pressure is in the area. Additionally, cool and wet conditions are found in the Southeast, showing that many disturbances move through the area during the October - March period.
You can find more effects in other areas in response to the PDO by clicking here.



Randy the Random Dude said...

Dear Andrew,

I love this blog of yours. I think it is a great way for me to see what is going on in the weather world. I just have two suggestions, which in my mind would make this blog go the distance:
1. A profile page. It seems that all that we know you as is "Andrew". It would be nice if you had a profile page with stuff such as age, what you do for a living, things you do for fun, etc. That would allow us to connect more with you, the author. Secondly, I think it would be cool if the blog had its own email address, such as That way we could ask you questions in private via email, without having to have it shown publicly on the comments. Thanks for reading this!

Anonymous said...

will Charlotte n.c. see any cold/snow this year?

Andrew said...

Randy: Those are great ideas, and I may be able to try them out in the not-so-distant future. Thanks!

Anonymous: Definitely better snow/cold chances this year compared to last year.