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Extreme Cold, Snow & Sleet: SECS 1/24 - 1/26


TriPol
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6 minutes ago, snowman19 said:

It’s time to use the mesoscale models from here on out. Follow the tracks of the midlevel lows, not the surface features, they will determine where/when the changeover to sleet and subsequent dry slot happens. I would definitely follow the NAM when it comes to showing the progression of the midlevel warm nose, we are now in its “wheelhouse” time frame for that, the only thing that model actually excels in

What about the hrdps? Its not terribly different than the nam but seems thumpier

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8 minutes ago, snowman19 said:

It’s time to use the mesoscale models from here on out. Follow the tracks of the midlevel lows, not the surface features, they will determine where/when the changeover to sleet and subsequent dry slot happens. I would definitely follow the NAM when it comes to showing the progression of the midlevel warm nose, we are now in its “wheelhouse” time frame for that, the only thing that model actually excels in

Yeah we are all pretty sure you said that about the NAM like 5 times yesterday! 

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2 hours ago, weatherpruf said:

Superintendent is a power position like the mayor; I had one who sent home flyers saying they don’t close for snow in places like Michigan so we don’t either. We’d be open when no one else was. Half the teachers would be out and I had to cover their classes and mine. So I decided to call out as well. Was glad to leave that district.

It happens in my job too as I have another power position.

 

Half the time we deice, we dont have to. It costs thousands if dollars, wastes 15-30 mins, and spreads a ton of toxic chemicals.

I often bypass the process when its not needed by a simple wing check. but in this day and age, you better be confident im your decision. You better be right in your decision. You better be in control of your decision, and you better be in the air safely and quickly in your decision.

 

When it involves 1000 school kids you can’t say any of.

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21 minutes ago, snowman19 said:

The HRDPS is the high res RGEM. It gets good closer in. I’d start following it at 0z tonight

You were right on this one. Starting to think closer to 6 before the flip but will range 6 to 10 in case the initial thump is impressive. Is that what your thoughts are?

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Just now, Snowlover11 said:

Uk has been showing a snow hole over nyc gor like 6 runs lol

British embassy asked the Met office to go gentle on the city - there has been a tendency on UK and GGEM but it doesnt have much other support QPF has been amazingly consistent in the >1.00 inch range (LE)

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19 minutes ago, sussexcountyobs said:

And of course on the coldest day of the year, pre snowstorm, my heat upstairs isn't working. I think it's the circulator pump?

Check the pump if it’s cold while the heat is running it’s toast 

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Positive possibilities

Front end overrunning over performs (>0.6) of the total 1.0 - 1.4 QPF at 12:1 or 15:1 ratios and the mix / sleet is light precip.  That first 6 - 8 hours is key to the front end WAA snows.

 

Snowfall from 0.65" Liquid (LE)

Snow Ratio Snowfall
12:1 7.8 inches
15:1 9.8 inches

 

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7 minutes ago, EastonSN+ said:

You were right on this one. Starting to think closer to 6 before the flip but will range 6 to 10 in case the initial thump is impressive. Is that what your thoughts are?

The initial front end thump is definitely going to be impressive. That’s locked in, I think the only remaining question is, when does the changeover to sleet with the warm nose then dry slot happen? As a sweeping generality, I’d say 6-10 in the NYC metro area (including the immediate north and west suburbs) before the changeover/dry slot

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