Glossary of Terms for Weather Posts
Written by Sig Silber
Last updated November 6, 2016
First I direct you to the extremely good glossary developed by Meteorologist Jeff Habyi which can be found here. The first page is a general discussion with some useful links and then there is a long alphabetical list of meteorological terms. It is very complete but focuses on meteorolgoical terms not climate teminology. So when I have extracted part of a NOAA discussion and there is some terminology that you do not understand you will find it in this glossary. It will also allow you to access the Haby Hints index. Remember to get back you have to hit the back arrow and depending on how many levels you delve into Jeff Haby's Jargon Discussion, that is how many times you will have to hit the back arrow to return here and then one more time to return to the article from whence you started.
The following are almost totally terms not discussed by Jeff Haby as they are climate terms not meteorology terms or they are terms where I wanted to add additional information. So you may have to first look at Haby's Glossary and if you do not find what you want look below. With a little practice you will quickly learn what you can find in Haby's Glossary and what you will find below as the difference is that what is below is not usually found in a daily weather report and everything in the Jeff Haby Glossary is terminology or symbols that would be found in a daily weather report.
Items are alphabetical. One can use Cntrl +F to more quickly find your item. When finished hit your Backspace Key to return to the Article.
AMO = Atlantic Multidecadal Oscillation
Analogs Here is how NOAA describes it.
You may or may not be able to tell that there are two sets of analogs one that correlates with the initial conditions and one that correlates with the forecast. The initial conditions analogs are published with the 6 - 14 Day Outlook. The correlation with the forcast can be found by clicking on the map where it says analogs. I find the first set more meaningful but some find the second set of most value.
IRI ENSO Forecast
The Southern Oscillation Index, or SOI, gives an indication of the development and intensity of El Niño or La Niña events in the Pacific Ocean. The SOI is calculated using the pressure differences between Tahiti and Darwin. Sustained negative values of the SOI below −7 often indicate El Niño episodes. These negative values are usually accompanied by sustained warming of the central and eastern tropical Pacific Ocean and a decrease in the strength of the Pacific Trade Winds. Sustained positive values of the SOI above +7 are typical of a La Niña episode. They are associated with stronger Pacific trade winds and warmer sea temperatures to the north of Australia. Waters in the central and eastern tropical Pacific Ocean become cooler during this time.
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