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February 4th-6th Storm Threat Discussion


Sn0waddict

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sorry to drift off topic but the HRRR runs off the RAP and the RAP uses the RUC snow accumulation variable.

 

"Snow Accumulation: This field is calculated using a 10:1 ratio from the accumulated snow water equivalent. This ratio varies in reality, but the ratio used here was set at this constant value so that users will know the water equivalent exactly. The snow accumulation (through the snow liquid water equivalent) is explicitly forecast through the mixed-phase cloud microphysics in the model."

 

source: http://ruc.noaa.gov/vartxt.html#Snow

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Those amounts may not be so shocking if the snow comes in like a wall and dumps crazy amounts over a few hours before transitioning to IP/ZR. This would only make the situation tomorrow even worse with a glaze on top of more snow cover.

Sure, but not ONE longer range model saw it?  Those amounts are insane.  I just can't believe it.  I want to.  I just can't.  I think sleet/ZR is in the mix for those totals.

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The more concerning thing is the 4km NAM, at 1.33km resolution, showing temperatures in the upper 20's for the duration of the event anywhere west of NYC and north of Trentons latitude.

It's very concerning especially with so much snow still on the trees and power lines, so it'll only add to the weight. 

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The Local News And NYC School System is underestimating the ice threat! Kids have school! Parents will be driving, people will slip and cars will crash! This is serious and I personally would tell everyone to stay home! I hate our mayor and local news

It's almost impossible to get an ice storm in NYC.

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The Local News And NYC School System is underestimating the ice threat! Kids have school! Parents will be driving, people will slip and cars will crash! This is serious and I personally would tell everyone to stay home! I hate our mayor and local news

Your probably in high school just like me hoping for Deblasio to close, lol I can tell

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The funny thing is the worste part of the storm is smack in the middle of rush hour! Tomorrow morni is going to be a mess especially here where earlier we were thinking rain an now it's look to be ice with a tiny bit of rain at te end

We're in some cases 5-6 degrees colder than the NAM had us for now, and that was a ton of ice for most of the area. That should be very concerning, given there will be an offshore wind throughout the event. Maybe we'll luck out and have more sleet, but the potential for significant ZR is real and growing here.

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