Chinook Posted January 26, 2011 Share Posted January 26, 2011 For some random reason, I was just looking at the SOI archives on this web site: http://www.bom.gov.au/climate/current/soihtm1.shtml I saw that December 2010 SOI was 27.1. Glancing back through the table, there was never a higher SOI index in December. The only higher monthly value of SOI was November 1973, when it was 31.6. There are a lot of numbers on the table, and I could have missed something. This just strikes me as weird. Now, looking at the 2-monthly MEI index from this web site: http://www.esrl.noaa.gov/psd/people/klaus.wolter/MEI/table.html the Nov/Dec 2010 MEI was -1.519. The most recent 2-month period when it was this low or lower was Feb/Mar 2008, when it was -1.529. Other low MEI values were: 1973-1974 winter 1954-1956 time period Jul/Aug 1964 January-April 1971. Link to comment Share on other sites More sharing options...
wxmx Posted January 26, 2011 Share Posted January 26, 2011 For some random reason, I was just looking at the SOI archives on this web site: http://www.bom.gov.a...t/soihtm1.shtml I saw that December 2010 SOI was 27.1. Glancing back through the table, there was never a higher SOI index in December. The only higher monthly value of SOI was November 1973, when it was 31.6. There are a lot of numbers on the table, and I could have missed something. This just strikes me as weird. Now, looking at the 2-monthly MEI index from this web site: http://www.esrl.noaa.../MEI/table.html the Nov/Dec 2010 MEI was -1.519. The most recent 2-month period when it was this low or lower was Feb/Mar 2008, when it was -1.529. Other low MEI values were: 1973-1974 winter 1954-1956 time period Jul/Aug 1964 January-April 1971. More impressive, IMO, is that is the second highest 6 month average SOI since 1876, just behind 1917...and Jan 2011 will make it 7 months around 20 Link to comment Share on other sites More sharing options...
JBG Posted January 27, 2011 Share Posted January 27, 2011 More impressive, IMO, is that is the second highest 6 month average SOI since 1876, just behind 1917...and Jan 2011 will make it 7 months around 20 And also impressive is the weather that's occurred in this uber-Niña context. Link to comment Share on other sites More sharing options...
DaculaWeather Posted January 27, 2011 Share Posted January 27, 2011 For some random reason, I was just looking at the SOI archives on this web site: http://www.bom.gov.a...t/soihtm1.shtml I saw that December 2010 SOI was 27.1. Glancing back through the table, there was never a higher SOI index in December. The only higher monthly value of SOI was November 1973, when it was 31.6. There are a lot of numbers on the table, and I could have missed something. This just strikes me as weird. Now, looking at the 2-monthly MEI index from this web site: http://www.esrl.noaa.../MEI/table.html the Nov/Dec 2010 MEI was -1.519. The most recent 2-month period when it was this low or lower was Feb/Mar 2008, when it was -1.529. Other low MEI values were: 1973-1974 winter 1954-1956 time period Jul/Aug 1964 January-April 1971. I created an Excel spreadsheet with the SOI data that I'll post when I get home. I did an average for each year and an overall average. Out of all that data the overall average was .1, it should make it fairly easy to correlate the years with the highest/lowest index to see whether it matches the Nina/Nino patterns. I'd personally like to see how this matches up with winter storms too. Link to comment Share on other sites More sharing options...
TXWXCHX Posted January 27, 2011 Share Posted January 27, 2011 I created an Excel spreadsheet with the SOI data that I'll post when I get home. I did an average for each year and an overall average. Out of all that data the overall average was .1, it should make it fairly easy to correlate the years with the highest/lowest index to see whether it matches the Nina/Nino patterns. I'd personally like to see how this matches up with winter storms too. Thank you! I look forward to looking at your data! Analogues for this year have been difficult; my favored pick (based on teleconnections) was an early 1950's double nina pattern (-pdo, +amo) and my humble prognostication is now officially dead in the water. This weather pattern in no way resembles that year for Central Texas. From all the data I can gather, this winter has been colder with more precipitation than expected... Link to comment Share on other sites More sharing options...
DaculaWeather Posted January 27, 2011 Share Posted January 27, 2011 Ok, here's the spreadsheet, It's uploaded as a .txt file, when you download it change the extension to .xlsx, this is in the newer Excel format. If you'd like the older format I can do one and upload it also. I added some conditional formatting to highlight the various levels of the index. You can delete those if you find it annoying! Right now it's sorted by yearly avg.soi.txt Link to comment Share on other sites More sharing options...
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