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SOI Graph since 1950.. I'm still learning the SOI stuff, Here's a quick overview.. Hate that they have red as negative and negative as warm. Just looks weird. lol Negative SOI indicates El Nino still present.
" The Southern Oscillation Index (SOI) is a standardized index based on the observed sea level pressure differences between Tahiti and Darwin, Australia. The SOI is one measure of the large-scale fluctuations in air pressure occurring between the western and eastern tropical Pacific (i.e., the state of the Southern Oscillation) during El Niño and La Niña episodes.
In general, smoothed time series of the SOI correspond very well with changes in ocean temperatures across the eastern tropical Pacific. The negative phase of the SOI represents below-normal air pressure at Tahiti and above-normal air pressure at Darwin. Prolonged periods of negative(positive) SOI values coincide with abnormally warm(cold) ocean waters across the eastern tropical Pacific typical of El Niño(La Niña) episodes. "
Hopefully not a blow torch La Nina event for east of the Rockies. Last winter was a complete joke with hardly any snow.
We had two historically cold winters in a row so maybe now we could get two historically warm winters in a row. I was really digging the 50s and 60s in December
Hopefully not a blow torch La Nina event for east of the Rockies. Last winter was a complete joke with hardly any snow.
Not likely with all that warm water off the PNW. We will not have a mild winter till that warm water is gone. It is very difficult for the eastern US to have a mild winter in a warm PDO. Mild winters in eastern US happen in cold PDO absent El Niño. That is why I want Seattle cold.
Not likely with all that warm water off the PNW. We will not have a mild winter till that warm water is gone. It is very difficult for the eastern US to have a mild winter in a warm PDO. Mild winters in eastern US happen in cold PDO absent El Niño. That is why I want Seattle cold.
Maybe more so you than me..... Positive PDO seems to have a big impact in the Southern states and on the East Coast which in terms of temps, are below average, and above average in the Upper Midwest.... For me, it's a neutral impact with near normal temps during the winter months.
Quote:
The PDO has two phases: positive and negative. In the positive phase, above normal sea surface temperatures preside over the waters immediately offshore the coastline from Alaska down to the Pacific Northwest. In the open northern Pacific waters, a body of below normal sea surface temperatures are observed. It can be thought of as warm water along the coastline surrounding the colder waters in the open northern Pacific. In the negative phase, it's exactly the opposite. Cooler waters are dispatched along the coastline from Anchorage to Seattle, and warmer than normal waters cover much of the northern Pacific. Until recently, we have been in a negative PDO phase. This meant that precipitation trends during the winter were very dry along most of the Southern US, including the Gulf Coast states. This dry trend continued into the Mid-Atlantic, before very slight above normal precipitation anomalies were favored in the Great Lakes region. The negative PDO tends to favor a very wet West Coast. In the temperature department, a negative phased PDO meant nearly everyone in the nation experienced increased chances above normal temperatures (outside of the Northern Plains, which was favored to experience below normal temperatures).Now that we are entering into a positive PDO that looks like it won't be going away anytime in the next several weeks, let's see what the positive PDO composites for temperature and precipitation look like.
Maybe more so you than me..... Positive PDO seems to have a big impact in the Southern states and on the East Coast which in terms of temps, are below average, and above average in the Upper Midwest.... For me, it's a neutral impact with near normal temps during the winter months.
This is why I have been saying all along, that for me, a +PDO alone, doesn't mean much, and I've proved this to you using data.
Cold summer for you.
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