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November Mid/Long Range Discussion


WxUSAF
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Yesterday it was a -pna forecast through and through, and today half and half. The models are so volatile because of the ENSO/PDO battle that they really have no idea who’s going to win in the near term. Their guesses are as good as ours. 

Think this is what Chuck was alluding to - unusually volatile model forecasts.

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Yesterday it was a -pna forecast through and through, and today half and half. The models are so volatile because of the ENSO/PDO battle that they really have no idea who’s going to win in the near term. Their guesses are as good as ours. 
Think this is what Chuck was alluding to - unusually volatile model forecasts.

The pna has been showing up on tgiving week for several days now
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10 hours ago, Terpeast said:

Yesterday it was a -pna forecast through and through, and today half and half. The models are so volatile because of the ENSO/PDO battle that they really have no idea who’s going to win in the near term. Their guesses are as good as ours. 

Think this is what Chuck was alluding to - unusually volatile model forecasts.

A lot depends on the Pac jet strength/position of the exit region. Recent ens runs are digging a trough into the GoA just beyond mid month, but right at the end of the runs it seems to flatten and the PNA appears to trend positive. Definitely some volatility wrt the Pacific pattern. I have no expectations for November/early Dec other than seasonable weather, and we could use a little rain.

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If we are going to be in a cold/warm oscillating pattern then it can stay warm until early December then we can go cold mid Dec through mid January have our Jan thaw then February through March end with a bang. Im not a fan of October and November snows when it comes to what it means for the rest of winter but if it's the only snow we get then bring it.

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1 hour ago, Weather Will said:

Potential for a good year is falling into place, but it will be a wild ride of model watching- look at the GFS temperature differences in the long range between WB 6Z and 12Z.  In central NC about a 40 degree swing in one run....

IMG_1905.png

IMG_1904.png

The model run looks nothing like the last at hour 240+? Wow!!!! This happens all the time. Unless something is inside 120 this winter I ain’t even paying attention. 

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On 11/4/2023 at 6:58 PM, WxUSAF said:

Definitely been signs of a stout +PNA possibly forming 5ish days before thanksgiving. Also looks like precipitation finally ramps up after mid month.

I was checking dry Oct/Nov periods and since 1950 all 5 combinations of Oct and Nov that were well below normal (<1.5" precip/month) were in Nina or negative neutral periods.  So, it would certainly argue for an increase in precipitation later in the month.  

(1964, 1974, 1998, 2001, 2016 - winters were below normal precip and snow, but again, all Nina-like)

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