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NYC/PHL January 7-9 Potential Part Deux


NickD2011

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We'll need to keep an eye on the SREFs and other short term models tomorrow but this is why its foolish 48 hours out for forecasters to be calling for 4"+ in any specific location yet in this type of storm.

the Euro is the outlier with storm 1 right now..most other modela spitting out .25-.50 with higher amounts in norlun locations..

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For my money, I'd take the WRF ARW in any mesoscale situation

I remember that Feb 09 Norlan on that day WRF ARW had a 12"+ band cutting across Berks County, Reading getting 15", we ended up with an inch or two. As the action was from Phl southeastward into NJ. A seperate band did develop in east centeral PA a narrow band of 12" snows in Lancaster County. About 40 miles sw of Berks/Reading area. Point being that even though the WRF ARW depicted the event and its effects very well, it can be such a narrow band that the placement can't be predicted well even on the hi res model.

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Would anyone hazard a guess as to where the trough is most likely to set up, based on the positioning of the low.

Pick a spot between PHL & boston. Get a large map out, blindfold yourself and try to pin the norlun on the area! Kinda like pin the tail on the donkey, but with weather and inverted troughs. YAY!

But seriously, these things are so tough to pin point, you need to wait to like 12-18 hours to even get a marginal idea of where it could set up. In other words - Nobody really knows, not even the models or baby Jesus.

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Looks like the 18z NAM is making a move towards the Euro/GGEM this run. At 30 hours, the leading shortwave is significantly further north compared to the 12z run. Also, some minor changes with the backend shortwave based on the changing position of the PV. The PV looks more consolidated + further north on the 18z.

More of the same at hour 36,,,unfortunately.

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Looks like the 18z NAM is making a move towards the Euro/GGEM this run. At 30 hours, the leading shortwave is significantly further north compared to the 12z run. Also, some minor changes with the backend shortwave based on the changing position of the PV. The PV looks more consolidated + further north on the 18z.

More of the same at hour 36,,,unfortunately.

Still shows the norlun feature. Not sure what you are complaining about.

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Jackpot this time moves to the North and east of the city...I wonder if the NAM's higher resolution will help it see this event better than the globals

It should and I think it is signaling the potential magnitude of the mesoscale features. But in terms of exact placement of the jackpot of this event 60hrs out, it will keepo flipping around, and thats why no one should get excited in my opinion until its snowing outside their window

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Jackpot this time moves to the North and east of the city...I wonder if the NAM's higher resolution will help it see this event better than the globals

I'm diggin it, it just needs to stop trending east now.

Looks like the 18z nam would give good snowfalls to people between NYC and HVN

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Jackpot this time moves to the North and east of the city...I wonder if the NAM's higher resolution will help it see this event better than the globals

Those living between Englewood Cliffs, Poughkeepsie, and Bridgeport are in the consistent bullseye.

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