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February 11-12; 12-13: Are they real??


stormtracker
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4 minutes ago, BTRWx's Thanks Giving said:

What is the maximum range for the NBM?

           You can't really define a range for it, as it is combining forecasts from multiple ensemble systems with some extra adjustments made with bias correction techniques for amounts (not spatial coverage).   Ultimately, it only has much accuracy as the overall synoptic skill and skill-spread ratios of the various inputs, but its purpose is that it's not as prone to wild swings from individual solutions.      That said, the "deterministic" solution shown in that previous post is worth looking at, but it should be done in conjunction with percentiles and probabilities.  

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2 minutes ago, high risk said:

           You can't really define a range for it, as it is combining forecasts from multiple ensemble systems with some extra adjustments made with bias correction techniques for amounts (not spatial coverage).   Ultimately, it only has much accuracy as the overall synoptic skill and skill-spread ratios of the various inputs, but its purpose is that it's not as prone to wild swings from individual solutions.      That said, the "deterministic" solution shown in that previous post is worth looking at, but it should be done in conjunction with percentiles and probabilities.  

Thanks for the explanation.  Always wondered about how the ensembles factored into that.  Much appreciated. 

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This is starting to feel like January 6th. The northern crew is starting to pack it in (although I think there is more upside for you guys with this one). Jackpot zone from Quantico to Alexandria. With nice snows close to warning level up to Baltimore. I hope everyone scores big, but this is how it looks now. We don’t have the temps leading in to get a foot plus again, but 6-10 in the jackpot zone seems not unreasonable.

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1 minute ago, NorthArlington101 said:

You kinda are - this doesn’t include the lingering snow and the start of the second wave, which was included in the maps people posted earlier… this is only the “meat”

Anything anywhere for round 2 before it craps the bed?

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Wow! Richmond and north to Fredericksburg look like the jackpot to me. I think it is a bit south, but not coming north anymore. Just hoping for precipitation expansion now
 

We got 4 days. More to gain than to lose
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Just now, stormtracker said:

I don't think anybody, plus or minus, should be locking anything in yet.  There is still plenty of time for changes, especially with the models windshield wipe-ring every run.   We we start getting into tomorrow, then models should start to converge I would think.

 Yup if I recall the jan 6th event didn't get locked down till we were only 48 hours out.  And even then it still drifted a bit north  in the last 24 hours

 

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