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Models Have Us On Northern Edge Of Snow 3/4/16


bluewave

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GGEM is what you want for a big storm, and the nam looks nothing it, idk why we're even analyzing the 84hr nam this in depth but whatever

Nams the only model showing that low pressure in PA, and if that were the case you would get a light 1-3/2-4" overrunning event while the main show slips off the NC coast

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GFS OTS, pretty hard to ignore 3 straight nearly identical runs

I mean other than intensity variances, and slight 25 mile shifts the last 3 runs have been identical to the T

 

 

The heavier precip is just slightly offshore. Even though these 3 runs are about the same, it wouldnt take too big of a shift to give NYC a snowstorm. Still over 3 days to go. 

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If you consider over 200 miles "just slightly offshore" then sure

To me 200 miles is just slightly offshore, especially with a few days to go.  Look at where GFS had it 2 days ago. Not much of a shift is now needed to give NYC a snowstorm. We don't know if it will happen, but it's very close on this run. 

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It does but we need bigger improvements. It prob won't make a big difference in the end but small improvements do start adding up.

Let's be patient and see where we are by this time tomorrow. NAM will be nearing sweet spot and any additional model help is welcome
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THERE IS STILL QUITE A BIT OF UNCERTAINTY IN THE THURSDAY NIGHT-

FRIDAY NIGHT TIME FRAME. ONCE AGAIN...STILL DEPENDENT ON TIMING OF

ENERGY EJECTING FROM THE ALEUTIAN LOW. ANYTIME YOU ARE RELYING ON

ENERGY INTERACTING WITH/EJECTING FROM A CUTOFF LOW THERE IS A HIGHER

DEGREE OF UNCERTAINTY THAN NORMAL. ADDED TO THIS...THIS IS IN A

REGION NOT WELL SAMPLED BY RADIOSONDES...AND THIS INCREASES THE

UNCERTAINTY EVEN FURTHER. IF MODEL TIMING IS ANYWHERE NEAR

CORRECT...THE ENERGY IN QUESTION SHOULD REACH THE WEST COAST

SOMEWHERE IN THE NEXT 24-36 HOURS. CERTAINTY SHOULD BEGIN TO

INCREASE AFTER THAT POINT.

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Tell that to Upton. With balloon launches, they are then able to input data directly into to the models.

Occasionally the sampling thing still has impacts. We had a storm a few winters back, it may have been in 13-14 which was a lock on almost all guidance til about 84-96 hours out and as soon as the disturbance came ashore in California all models lost the storm. The system made a comeback to be a respectable hit but it never was what was depicted initially

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Anyway, strictly based on the cmc run, Eastern long island, those island, cape cod would do well with 3-6 extreme Eastern Suffolk, and upwards of 9 on cape cod.

Correction:

3-7 Eastern Suffolk with between Rhode Island and cape cod being the jackpot with upwards of 22 inches

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Occasionally the sampling thing still has impacts. We had a storm a few winters back, it may have been in 13-14 which was a lock on almost all guidance til about 84-96 hours out and as soon as the disturbance came ashore in California all models lost the storm. The system made a comeback to be a respectable hit but it never was what was depicted initially

I do remember that.
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