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Mid FEB through March Threats/Snow Storms


mitchnick

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Southerly flow on west side of Bermuda high for the loss.

 

You'd think a low that tracks through northwest LA would be good news.

 

Interesting transition from winter-like system with CCB to spring-like system with most of the precipitation in advance of the low.  Dreaded SE ridge. 

 

Still a long ways in the future --- not sure we should think in terms of trending yet --- just another possible solution

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Sorry for the noob question, but how exactly do these work? It picks a period of time (one day? 7 days?) and tries to analyze which prior patterns best match up?

 

It's an 11 day ensemble mean and pulls the 10 closest matches to similar height patterns within a reasonable timeframe. I'm not sure the forward and back date parameters but they are always within 2-3 weeks before and after the target date. 

 

Top left is correlation. In this case, .946 which is pretty high. 

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It's an 11 day ensemble mean and pulls the 10 closest matches to similar height patterns within a reasonable timeframe. I'm not sure the forward and back date parameters but they are always within 2-3 weeks before and after the target date. 

 

Top left is correlation. In this case, .946 which is pretty high. 

It's a 5 day centered mean centered on day 11.   I look for storm that are within 3 days of the centered mean dates provided. I think anything beyoond that is risky to do. 

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It's a 5 day centered mean centered on day 11.   I look for storm that are within 3 days of the centered mean dates provided. I think anything beyoond that is risky to do. 

 

I do the same after you posted about that a while back. The superstorm is at the edge but close...LOL

 

I read my post and it came off wrong. I meant centered on d11 and not "an 11 day". That didn't make sense. 

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It seems to me that all trends are south on the 17th-18th threat but the overall pattern would not support much of an over-correction so you may end up with a snowstorm out of this one (finally). Severe cold does make it all the way to the Gulf coast in the wake of the system so broadly speaking the climo would support a coastal track. A slight snow cover laid down on Sunday would help your chances too. But that massive albedo changer in the past three weeks over the northeast is the real high card in the deck here, every weak high that gets over that snow pack is going to radiate like crazy and feed back cold enough surface layers to help your chances.

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To know one's surprised, Euro is a hit for SNE/NNE.    It's between there and the Lakes...I'm traveling, screw this.

it's snowing there right now, and has been for hours, thanks to a breeze off the ocean

idk, as much as I want a decent storm, that is more than this area could ever handle

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To know one's surprised, Euro is a hit for SNE/NNE.    It's between there and the Lakes...I'm traveling, screw this.

Eventually they gotta fail but Euro/GFS aren't that far off.. not to mention the northern model. Hard to argue against SNE if there's solid proof it's going to happen again.

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