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2/19-2/20 Miller A Magic?


fountainguy97
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The 18z GFS gives me 6 inches. The 18z ICON and RGEM give me 5 inches. The NAM had been giving 5 inches here but now it's down to 3 inches. The 3K paints 4+ all along Cross Mountain but areas to the immediate east get downsloped I assume, and get 2 inches. Because there are 0 temp issues imby on any model. I am in the lower to mid 20s the entire event. 

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  On 2/18/2025 at 10:22 PM, John1122 said:

The 18z GFS gives me 6 inches. The 18z ICON and RGEM give me 5 inches. The NAM had been giving 5 inches here but now it's down to 3 inches. The 3K paints 4+ all along Cross Mountain but areas to the immediate east get downsloped I assume, and get 2 inches. Because there are 0 temp issues imby on any model. I am in the lower to mid 20s the entire event. 

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That is what we affectionately call “The Big MRX Screw”. lol!

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  On 2/18/2025 at 10:50 PM, John1122 said:

I'm sure it's whatever the latest NBM is. They basically seem to never use anything but it. It's pretty much an ensemble mean it seems. 

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They've told me that's what they use. From a logical standpoint you'd think it's the right way to go but, several rather poor Models get factored in and makes it not so great. 

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  On 2/18/2025 at 11:01 PM, Daniel Boone said:

They've told me that's what they use. From a logical standpoint you'd think it's the right way to go but, several rather poor Models get factored in and makes it not so great. 

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Yes, I agree. And one or two bad models can really skew the mean in both directions. 

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  On 2/18/2025 at 10:50 PM, John1122 said:

I'm sure it's whatever the latest NBM is. They basically seem to never use anything but it. It's pretty much an ensemble mean it seems. 

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YES!!!  It seems they always go NMB hardcore.  It also seems NMB is often weighted in weird ways that seem to be way more conservative than actual verification.  Great example was the deep south snow and our January snow.  Both they seemed to align with NMB and in both cases it was way more conservative than actual verification.

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I don’t know why, but I just can’t get excited about this one. I’ve seen too many of the deal killers mentioned for me to get my hopes up:

• downsloping
• sun angle
• warm nose
• virga
• energy transfer / hand-off

I hope I’m wrong and we all get a good event, but mentally, I’m just expecting a nuisance event at best for my location in Knoxville.


.

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  On 2/18/2025 at 11:04 PM, ShawnEastTN said:

YES!!!  It seems they always go NMB hardcore.  It also seems NMB is often weighted in weird ways that seem to be way more conservative than actual verification.  Great example was the deep south snow and our January snow.  Both they seemed to align with NMB and in both cases it was way more conservative than actual verification.

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The Jan 2024 event I specifically remember the NMB showing higher amounts than other models and I was confident they would go with that because they always do. lol…. The literally said in an AFD before it started, they were going with the SREF. That mod(s) was the lightest one and MRX was off by about 1/2 lol…

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