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January Medium/Long Range: A snowy January ahead?


mappy
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  On 1/15/2025 at 7:30 PM, mitchnick said:

If I could step in and say from experience that it's just best not to respond to others you may not agree with historically. 

For example, there's a guy on this site who I won't even answer. He's nothing but trouble. I can't remember his screen name, but all I can say is that I  Hate'm. I mean I  really Hate'm and have stopped all contact.

Just a thought.

 

P.s. intended as a joke by the way

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Jihad is not a bad guy deep down. 

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  On 1/15/2025 at 6:14 PM, WEATHER53 said:

So you now agree with me that the models DO NOT predict  weather but rather provide samples of a wide variety of possible outcomes. Then change that every 6 hours. I would also say the rest of them did not show “nothing” 

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do you not understand how probabilisitic modeling works - like just from a foundational statistical perspective?

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  On 1/15/2025 at 7:07 PM, mitchnick said:

EuroAI MUCH wetter for Sunday and a light to mod hit for Wednesday. 

Here's the link to scroll through precip. Easier thame posting separate maps.

https://charts.ecmwf.int/products/aifs_medium-mslp-rain?base_time=202501151200&interval=6&projection=opencharts_north_america&valid_time=202501151800

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Excuse me if this was already covered in depth, but does this "AI" model use verification data as a training set for the model and offset the  prognosticated/ computed values at each forecast hour based on historical bias/ machine learning?

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  On 1/15/2025 at 5:31 PM, WeatherQ said:

Haven’t seen your name since NWS Philly on Arch Street back when I interned before the Mount Holly move when Chet and Dean were there!  Hello Sir 

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Hi!  That's wayyyyyy back even before. my last move BOX got PHI in June 2010 (HOT summer there).  Hopefully it's a good life for all participants hereon. 

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  On 1/15/2025 at 8:15 PM, stormtracker said:

I'm telling yall, we're gonna keep getting all sevens on each model every few runs.   The choice time is when they all settle on triple 7s...which we won't know probably until Friday for the Sunday thing and Sunday for the mid week thing.   Fun times, IMO.   Even better is watching most folks here swing like human pendulums run to run.  Oh what a time!

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Verifications:

images?q=tbn:ANd9GcSKMBOIiCnaFf3WhmGyBk7

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  On 1/15/2025 at 7:40 PM, SomeguyfromTakomaPark said:

Scrolling through the past Euro AI runs it has been remarkably consistent for the Sunday event, all the way back to 18z on Janaury 11th it has basically shown the same thing.  It's been way more consistent than the GFS and even a bit more consistent than the regular Euro.  I'm not saying that means it will be correct but it's interesting how little it's oscillated. 

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It doesn’t mean this is a lock, guarentee, etc…but that’s a pretty good sign at lead that it might be on to something. Now, this pattern incoming is very complex, so it might not grasp the magnitude of what’s to come, but you want to see run-to-run consistency on the AI, that’s for sure. Hopefully it’s seeing something that the operational ECMWF can connect with as we move closer. We shall see. A good experiment for this pattern. I’ll be keeping tabs. 

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  On 1/15/2025 at 9:23 PM, Weather Will said:

Don't worry.  Extended EPS like February.  Hard to believe it now goes into March...

IMG_4876.png

IMG_4878.png

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The key to this is whether the scandinavian ridge connects with the aleutian ridge to drop the AO and keep the cold across the CONUS. Something to keep an eye on, because if this connection fails, we may see more SE ridging.

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  On 1/15/2025 at 9:36 PM, Terpeast said:

The key to this is whether the scandinavian ridge connects with the aleutian ridge to drop the AO and keep the cold across the CONUS. Something to keep an eye on, because if this connection fails, we may see more SE ridging.

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EPS and CMC ens have been trending in that direction for late month. GEFS took a step towards that today.

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