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Stormchaserchuck1

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Everything posted by Stormchaserchuck1

  1. Stormchaserchuck1
    599dm SE of Greenland! That has to be a record The SE usually averages BN in such a pattern. It's called a south-based -NAO (one of 6 major patterns in the N. Hemisphere).
  2. Stormchaserchuck1
    18z gfs: Widespread 0.1-0.5"
  3. Stormchaserchuck1
    One thing I have noticed is our tendency for -NAO around Christmas since 2017, in the midst of a pretty +NAO time. Here's +1-3 days from 12/25 since 2017: https://ibb.co/nw0L2D6
  4. Stormchaserchuck1
    This is more accurate
  5. Stormchaserchuck1
    Keeping a ridge over the NE, but if we see the same Pacific in January we are likely to see a trough lol
  6. Stormchaserchuck1
    snow depth maps always verify the best
  7. Stormchaserchuck1
    This forum has an obsession with the element water. In fact, water is very heavy and does not quickly hold or make trends. So many years it's about snow accreting or declination but it really means very little. Same with the PDO, low and high pressures care not about water temps. Air>water.
  8. Stormchaserchuck1
    Yeah because cold air is coming in from the west.
  9. Stormchaserchuck1
    Opposite of last year https://ibb.co/dL5941t
  10. Stormchaserchuck1
    That's one heck of a +PNA/Aleutian trough on the 18z GFS ensembles.. but believe it or not, PNA is only correlated to Mid Atlantic weather at 0.1-0.2 in December. In January it goes up to 0.5-0.6 https://ibb.co/PWB2bSx https://ibb.co/160H289 https://ibb.co/2WBZ6tx https://ibb.co/KKP2ZHQ Still a <-240dm ensemble mean average this far out (days 12-15) is very strong.
  11. Stormchaserchuck1
    We had like 80 snow days in 02-03
  12. Stormchaserchuck1
    It's pretty cool out today. I was driving around thinking that this is a chilly airmass for it being the start of the warmer period (indexes). It does feel like cooler Dec's before cooler Winter's imo.. Models do trend based on current conditions.
  13. Stormchaserchuck1
    It's very hard to go into and out of a -NAO without a Trace or some light snow. I had a dusting last March when the NAO was heading back to 0, and in December it snowed briefly when the NAO was lifting up too.
  14. Stormchaserchuck1
    ^ Since 1948, El Nino/-QBO correlates to +anomaly at 10mb in the Winter 75% of the time, and La Nina/+QBO correlates to -anomaly at 10mb in the Winter 75% of the time. The El Nino is +2.1, and QBO -19, so they are both top 15% strongest.
  15. Stormchaserchuck1
    If it's starting today, the highest correlation to 500mb -NAO starts ~Jan 5-10.
  16. Stormchaserchuck1
    This is a strong 11-15 day signal for +EPO on the 6z GEFS. https://ibb.co/sq5tH7X We haven't had any snow in stronger +EPO I think for at least the last 5-6 years. Looking for the model to change (it's been in flux more than average this year), or for that AK trough to become +PNA in the time after... but we likely won't see any snow for the next 15-16 days after today. That can also be a very warm pattern as it evolves.
  17. Stormchaserchuck1
    Doesn't explain why the N. Pacific low ends up in Alaska. Truth is it's just a handful of years, and given more examples, the normal forcing rules will prevail: North and South of where the OLR/heat is on the equator. Here's Jan-Feb.. no correlation over Alaska https://ibb.co/1XjjcNm December.. gasp.. a 0.1 correlation over Alaska lol which I think is just a lack of samples https://ibb.co/V2CyLcG Wavelengths does make Jan-Feb overall a higher correlation though.. no doubt the correlation could kick into gear then.. but I do think it's something else at play really fighting +PNA right now.
  18. Stormchaserchuck1
    The actual tropical forcing should favor a cooler Dec as well. What is so special about the month December that makes it break normal ENSO-forcing? Too many lazy correlations imo
  19. Stormchaserchuck1
    500mb low over Alaska is the worst pattern for snow.
  20. Stormchaserchuck1
    I know.. I'm starting to root for January to be warm lol. Euro weeklies bust and every other seasonal model.
  21. Stormchaserchuck1
    It looks to me like it's a load pattern for late Dec/early Jan -NAO.. Ridge over the NE-eastern Canada and Scandinavia roll forward to about a +60dm anomaly over Greenland in 1-2 weeks. in other words, all the forecasts for cold coming around and after Christmas are giving us a blowtorch pattern before then lol. There is heavy model agreement for a +10mb in the first week of Jan too, so that may also be part of what we are seeing as a -NAO load pattern.
  22. Stormchaserchuck1
    So tired of hearing about the MJO, it's stale. In that last 5 years, real time, I found that it's not a very successful forecasting method. My roll forward methods also showed close to random success beyond D-0. Nino 3.4 is +2.15, why not focus on that? That's what's not working. lol
  23. Stormchaserchuck1
    They actually vary at different times of the year. In Nov, it takes 10mb 40-50 days to downwell, and in March, 10-15 days on average. Dec 25th the lag is 30 days, and Jan 15 the lag is 25 days, so that would make the Jan 25-Feb 10 period the highest likely to have -NAO.
  24. Stormchaserchuck1
    10mb Correlation to 500mb -NAO around Jan 9th is ~+25 days, so that would favor -NAO centered on Feb 3.
  25. Stormchaserchuck1
    We held the -NAO through the end of December that year, with the N. Pacific ridge even intensifying (expanded -AO re-up). https://ibb.co/qB11CVd https://ibb.co/vZCvYJd Current models today have -NAO sticking in the medium range, and maybe the long range. The -PNA in Dec 2010 was actually the start of a phase shift, We hadn't seen values anywhere near that in the PNA region since satellite era in 1948. Dec 2021 eventually topped that.
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