NAO

[cycloneye]

I lost the links to the NAO data,but mainly my question here is how the North Atlantic Occillation (NAO) is right now.A negative NAO means weaker Azores/Bermuda Highs and positive NAO is the contrary.

I suspect the NAO is positive as the Azores high is fairly strong at this time.

[srainhoutx]

I lost the links to the NAO data,but mainly my question here is how the North Atlantic Occillation (NAO) is right now.A negative NAO means weaker Azores/Bermuda Highs and positive NAO is the contrary.

I suspect the NAO is positive as the Azores high is fairly strong at this time.

http://www.cpc.ncep.noaa.gov/products/p ... /nao.shtml

[cycloneye]

Thank you for the link.Plenty of information there about this important factor.Lets see how the NAO will be when the peak of the hurricane season arrives.

[MiamiensisWx]

I lost the links to the NAO data,but mainly my question here is how the North Atlantic Occillation (NAO) is right now.A negative NAO means weaker Azores/Bermuda Highs and positive NAO is the contrary.

I suspect the NAO is positive as the Azores high is fairly strong at this time.

Actually, a negative NAO correlates with a weaker or non-existant Bermuda ridge and a positive H5 anomaly near the Azores. This is particularly evident when the global circulation reflects a La Nina-esque pattern in June. On average, historical base averages show a positive correlation with a developing upper ridge over the desert Southwest. This is most prounounced in a negative PDO regime, which supports an upper ridge over the American Southwest and a broad H5 trough over the Midwest/Northeast in a similar -NAO configuration in regards to mean ridge position over Greenland. Exhaustive previous studies have also identified a correlation with higher heights in the Azores region during a base Nina state in the global pattern. Consequently, when coupled with the identifiable current pattern, negative heights in the typical "territory" of the Bermuda/Southeast ridge (western North Atlantic) is evident, along with a stronger ridge over the vicinity of the Azores.

[Blown Away]

Since the 1950's pretty much every Cane that impacted SFL occurred during a positive NAO. The graph shows the NAO moving into negative phase for now.
http://www.cpc.ncep.noaa.gov/data/teled ... series.gif

[cycloneye]

I lost the links to the NAO data,but mainly my question here is how the North Atlantic Occillation (NAO) is right now.A negative NAO means weaker Azores/Bermuda Highs and positive NAO is the contrary.

I suspect the NAO is positive as the Azores high is fairly strong at this time.

Actually, a negative NAO correlates with a weaker or non-existant Bermuda ridge and a positive H5 anomaly near the Azores. This is particularly evident when the global circulation reflects a La Nina-esque pattern in June. On average, historical base averages show a positive correlation with a developing upper ridge over the desert Southwest. This is most prounounced in a negative PDO regime, which supports an upper ridge over the American Southwest and a broad H5 trough over the Midwest/Northeast in a similar -NAO configuration in regards to mean ridge position over Greenland. Exhaustive previous studies have also identified a correlation with higher heights in the Azores region during a base Nina state in the global pattern. Consequently, when coupled with the identifiable current pattern, negative heights in the typical "territory" of the Bermuda/Southeast ridge (western North Atlantic) is evident, along with a stronger ridge over the vicinity of the Azores.

Good clarification about what the NAO does.I made this thread not only because I lost links of the data of NAO,but I wanted to have this thread as a learning one that I am sure that many members especially the newbies dont know what is the NAO and how it affects the hurricane seasons.