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40/70 Benchmark

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  1. This may come off the wrong way and induce some eye rolls, but I am really encouraged by my past couple of seasonal efforts despite the poor overall verification results. I honestly feel like my methods have continued to improve and the products are better than the ones that verified fairly well over the past decade. Its kind of analogous to a slugger with a statcast graphic adorned in red that isn't necessarily reflected by the poor surface stats. I feel like I have patched up some holes in my methodology and have fairly accurately predicited the gist of the hemispheric pattern, whereas some of those years that I ostensibly "nailed" were due to a good degree of luck that belied some huge forecast shortcomings. I have really improved with respect to the polar domain, but I obviously need to address the extra tropical Pacific and how to incoporate older analogs into a modern seasonal forecast.

    I will no longer be ignoring the West Pacific Osillation, that is for sure....the Pacific drives the bus over the US and the West Pacific drives the Pacific.

    • Like 5
  2. 5 hours ago, mitchnick said:

    There was speculation last fall that the volcano that ejected all that water vapor would cause a strong PV for the winter. That wasn't the case and it was below normal almost the entire winter. We'll need that again and hope for some weakening of the PDO to have a better winter. Worldwide ocean temps are going to be much cooler than last year which should help fwiw.

    That is one aspect that I nailed...I confidently called BS on that. However, we are beginning to reach the point in the solar cycle that is very favorable for potent PVs. We can maybe squeeze one more season before its up uphill battle for a few years in that respect.

    I would be pretty suprised if next season isn't somewhat better than last season, but that isn't saying much. The cooler oceans should help a bit.

    • Thanks 1
  3. On 5/1/2024 at 10:48 AM, Great Snow 1717 said:

    I've been saying that for quite some time. 

    Operative word being "almost"...I don't think they are entirely useless, but its clear now that you can't just rip and read these analogs from 20+ years ago.

    Agree.

  4. On 4/4/2024 at 11:41 AM, WxWatcher007 said:

    CSU forecasting ACE of 210 in their first forecast @40/70 Benchmark

     

    Top 10 Atlantic hurricane seasons
    Season TS HU MH ACE
    1933 20 11 6 258.57
    2005 28 15 7 245.3
    1893 12 10 5 231.15
    1926 11 8 6 229.56
    1995 19 11 5 227.10
    2004 15 9 6 226.88
    2017 17 10 6 224.88
    1950 16 11 6 211.28
    1961 12 8 5 188.9
    1998 14 10 3 181.76

    Individual storms in the Atlantic

    Boston Snowfall:

    1933: 62.7"

    2005: 39.9"

    1893: 64.0"

    1926: 60.3"

    1995: 107.6"

    2004: 86.6"

    2017: 59.9"

    1950: 29.7"

    1961" 44.7"

    1998: 36.4"

    59.2" Mean Seasonal Snowfall.

    • Like 1
  5. On 4/23/2024 at 9:19 PM, Stormchaserchuck1 said:

    @40/70 Benchmark
    The CPC came with +0.75 NAO for DJFM March, which was outside of my +0.54 SD range for NAO forecast, based on May-September N. Atlantic SSTs. But if you look at the actual maps, the SLP between Iceland and Azores (where the NAO is calculated) is a slightly negative or neutral NAO index reading for the Winter, which fits my forecast, which was near 0.0 in prediction.

    Cool...yea, you do a good job with that.

    I am going to delve into the post season analysis probably next week...I think my snowfall forecast was decent outside of SNE.

  6.  Long Duration Nor' Easter Very Well Forecast

    Here is the Final Call for the major, long duration nor' easter that continues to intermittently effect the area even into this weekend.
     
    AVvXsEhMj3en2HUVelgBSgDL2xRf05ZRjQWk9H8F

    Versus what actually transpired in terms of snowfall across the area.
     
    AVvXsEhDb32tICF3J4bf_tZyRxSJrBCt5XMb5wgd

    The only minor issues with the forecast being that the general 4-8" area over southern Vermont would have been better served to reflect 5-10". And the the 5-10" area over southern New Hampshire should have been more widespread, as opposed to being relegated to the higher terrain of the Monadnocks. But others this was a very skillful forecast that was honed a few days out in a what was a uniquely complex and multifaceted storm system.
     

    Final Grade: A-

     

     

  7. 3 hours ago, powderfreak said:

    Terrible QPF forecast.  Euro wasn’t even close here.  GFS won, IMO.

    Reggie and Canadian were way too far south (not getting big snows up here)… NAM wasn’t great.

    GFS had it the whole way.

    IMG_9164.jpeg.3c5ca9efb64f8a8f72647fb4ae6e7e67.jpeg

    Is there one of these for SNE? I haven't seen BOX post a map....

  8. 5 minutes ago, Ginx snewx said:

    You mean your backyard . I wouldn't use them unless like Chris said marginal column

    No, I mean in the aggregate. The most accurate forecast would have been PDC throughout NE....10:1 and Kutchera were worse in CNE than PDC was in NNE. I'm not sure how you argue that. Is that the case every storm? No, but it was today.

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