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December 2022 Medium-Long Range Disco


WxUSAF
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1 minute ago, stormtracker said:

It really is.  H5 maps are nice, just 500 miles too far west. :facepalm:.  Maybe this storm sets something up after

The TNH pattern has been killing us. We’ve wasted several NAO blocks over the last 5 years the exact same way. The TNH ridge being pumped by “ya know” links to with the NAO ridge and pushes out any 50/50 way too fast so that systems can still cut. It’s been a repetitive issue. 

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2 minutes ago, psuhoffman said:

The TNH pattern has been killing us. We’ve wasted several NAO blocks over the last 5 years the exact same way. The TNH ridge being pumped by “ya know” links to with the NAO ridge and pushes out any 50/50 way too fast so that systems can still cut. It’s been a repetitive issue. 

Seems to be a decadal oscillation. It’s been pos for a while now  

https://www.cpc.ncep.noaa.gov/data/teledoc/tnh_ts.shtml

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3 minutes ago, Terpeast said:

Seems to be a decadal oscillation:

https://www.cpc.ncep.noaa.gov/data/teledoc/tnh_ts.shtml

It is and it’s always been better for us when it’s negative. BUT there were more examples in the past of a -NAO being able to beat down the +TNH pattern and suppress systems under us.  Recently the TNH seems to be winning even when the AO/NAO are ridiculously negative. 

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