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Converged on a 12/21/2024 coastal storm, however ... much higher than normal uncertainty relative to very shortterm. May need nowcast for impacting east/SE regions


Typhoon Tip
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'syzygy' storm, 1986 i believe it was.   then later on 10 years later, the 'megalopolis blizzard,'  1996  ... at first i was thinking there's been a dearth (historically ) of events in the first 10 days of january's. then i'm like, whaaaa.    i think it's just the last 10 year's worth of winters doing a fantastic job at gaslighting my memory ..heh.  

starting to like the 2-6th

edit,wrong thread -

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the nam has a nw bias at 60 hours.  

been pointing this out for years really ...

it seems this simple aspect just cannot penetrate heads -

so what happens in situations like this, over and over again ( and in a faster/gradient hemisphere as of late, this is common) any 'nw run' of that model, and there's this palpable giddiness that appears to not include the necessary constraint.   

this time - admittedly - it's a little more difficult because the euro appeared to be a little closer ... yeah, so there's empathy in the set-up 'miss-guidance' intangible here.   i get it.   

i think the back ground is what is toasting this scenario.   i mean there's a storm on the maps.  a fairly strong one at that.  ns should do well...etc.  but the back ground state of the local hemisphere has too much x-coordinate value to underpinning wave signal.   that i'm firmly confident is related to a badly timed phase 5 mjo dispersing it's turd into an otherwise impressive +pna surge.  bit of a destructive/negative interference that quite arithmetically dimmed the ability of this particular atmospheric cinema's interval to really go meridian enough

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7 minutes ago, ORH_wxman said:

RGEM moving east too...12z suite definitely saw something that is causing the eastward bump.

you know i remember back in the day .. they used to have a product/publication over at wpc called 'model diagnostic discussion'     it was based upon at least a cursory evaluation of the input grid to ferret out errors in the data that could effect the model processing out in time.   they'd even give recommendations.   like, 'recommend not weighting as much of the eta'  or the euro or mrf or ngm.  oh man, do you remember the "n"ot "g"ood "m"odel ?      just kidding, 'nested grid model'  

it may be that improvements in data and/or assimilations and both et al, got to where they figured they didn't need that. 

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7 minutes ago, Typhoon Tip said:

you know i remember back in the day .. they used to have a product/publication over at wpc called 'model diagnostic discussion'     it was based upon at least a cursory evaluation of the input grid to ferret out errors in the data that could effect the model processing out in time.   they'd even give recommendations.   like, 'recommend not weighting as much of the eta'  or the euro or mrf or ngm.  oh man, do you remember the "n"ot "g"ood "m"odel ?      just kidding, 'nested grid model'  

it may be that improvements in data and/or assimilations and both et al, got to where they figured they didn't need that. 

I remember that....mistake discontinuing it. Didn't realize that they had.

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  • Typhoon Tip changed the title to Converged on a 12/21/2024 coastal storm, however ... much higher than normal uncertainty relative to very shortterm. May need nowcast for impacting east/SE regions

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