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Remember 2005?

  • Kneel Turner
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13 years 3 months ago #206706 by Kneel Turner
Replied by Kneel Turner on topic Re: Remember 2005?



[size=30pt]"I believe in science!"[/size]

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  • garyabrill
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13 years 3 months ago - 13 years 3 months ago #206707 by garyabrill
Replied by garyabrill on topic Re: Remember 2005?
If faith does it for you, go for it.

This is the summary forecast which was updated October 18th. iri.columbia.edu/climate/ENSO/currentinfo/figure1.html
Note that the El Nino effect really dies off after mid-winter. Doubtless some of this is the seasonal effect of ENSO events and some may have to do with the inaccuracies that arise in longer forecast periods.

This must be the primary data point the CPC is basing their extended monthly outlooks on as it mirrors the forecast. They still show persistently dry conditions beginning again in December and lasting through the spring (the second, lower map is obviously the precipitation):
www.cpc.ncep.noaa.gov/products/predictio.../seasonal.php?lead=1

The complete discussion is here: www.cpc.ncep.noaa.gov/products/analysis_...visory/ensodisc.html

Click on any of the figure links to see the data from which the forecast is derived. The El Nino temperature indicators have weakened but in the past couple of months have risen again to +.3C. As the discussion indicates some models still expect the El Nino indicators to strengthen somewhat.

Personally, I still expect a strong ridge to form at some point because this late summer/early fall ridge was stronger (more persistent) than any we have ever seen. Since I don't go wholly on faith I have to think that something was causing that ridge to persist and it would be unusual for the ridge not to reemerge unless the causal factors for the ridge are all gone. The NWS said that late in that period the ridge was being enhanced by a typhoon in the Western Pacific, perhaps that typhoon has also caused a shift that has sent our weather in the opposite direction. Clearly there is now a tendency for zonal flow into our region. We will see. But I doubt faith will have anything to do about it.

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  • Jonn-E
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13 years 3 months ago #206708 by Jonn-E
Replied by Jonn-E on topic Re: Remember 2005?
If you look at Cliff Mass's from today you'll notice that the El Nino signal was larger and strengthing around the time that super-persistent ridge formed. I don't know if their is a defined causal relationship between high ENSO temps and summer/fall ridging up here in the PNW but it appears so from the armchair.

I choose to view this in a good light as the signal, and the ridge, are now both gone. Personally, I'm excited about the possibility this year of conquering some slopes that have alluded me for years, Like Genesee Chute and the West Face of Cap Hill.

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  • DG
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13 years 3 months ago #206369 by DG
Replied by DG on topic Re: Remember 2005?
For what it's worth, NOAA has discontinued their El Nino watch, and their forecast now favors ENSO-neutral conditions this winter...

www.cpc.ncep.noaa.gov/products/analysis_...dvisory/ensodisc.pdf

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