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December 27/28 Storm Threat


Baroclinic Zone

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Chuck 'em long, chuck 'em far. First thoughts. Biggest spots that I'm concerned with are near BOS, and central CT...will tweak later as needed.

Also, the northern VT 14"+ will be orographically enhanced and banding dependent on the north end of the system. Might have to lower them to 10-14" if VV banding signal isn't there as we get closer.

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I would take that in a second thanks for posting!

Chuck 'em long, chuck 'em far. First thoughts. Biggest spots that I'm concerned with are near BOS, and central CT...will tweak later as needed.

Also, the northern VT 14"+ will be orographically enhanced and banding dependent on the north end of the system. Might have to lower them to 10-14" VV banding signal isn't there as we get closer.

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Anyone had an in depth look at the EURO, and could let me know how much of that 1.5" of QPF falls prior to tainting?

Thanks.

It looks to me like between 0.75-0.90" falls as snow there. You are just starting to taint at 75 hours. But it could hold on as long as 78h...gradient is close. When you are getting 0.10"-0.20" per hour qpf rates, even an hour or two makes a big difference.

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It looks to me like between 0.75-0.90" falls as snow there. You are just starting to taint at 75 hours. But it could hold on as long as 78h...gradient is close. When you are getting 0.10"-0.20" per hour qpf rates, even an hour or two makes a big difference.

So, looks like pretty good agreement on 6-10", prior to a turn to rain here, right now....will wait until agter 00z suite to make that call.

Wouldn't be surprised to see a tick back nw.

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Chuck 'em long, chuck 'em far. First thoughts. Biggest spots that I'm concerned with are near BOS, and central CT...will tweak later as needed.

Also, the northern VT 14"+ will be orographically enhanced and banding dependent on the north end of the system. Might have to lower them to 10-14" if VV banding signal isn't there as we get closer.

Looks good... :snowing:

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Chuck 'em long, chuck 'em far. First thoughts. Biggest spots that I'm concerned with are near BOS, and central CT...will tweak later as needed.

Also, the northern VT 14"+ will be orographically enhanced and banding dependent on the north end of the system. Might have to lower them to 10-14" if VV banding signal isn't there as we get closer.

Nice...I'm liking 8-14" here honestly but I'll ramp up if this holds.

The NW deform band as SE flow aloft runs into a more NE turning NW flow in the low levels could be very productive. Also temps in snow growth region look optimal up this way.

Then once the flow backs NW, we'll clean up quietly while everyone else stops snowing. That'll boost storm totals an extra several inches as per the Greens SOP.

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Nice...I'm liking 8-14" here honestly but I'll ramp up if this holds.

The NW deform band as SE flow aloft runs into a more NE turning NW flow in the low levels could be very productive. Also temps in snow growth region look optimal up this way.

Then once the flow backs NW, we'll clean up quietly while everyone else stops snowing. That'll boost storm totals an extra several inches as per the Greens SOP.

Right. I think everyone in VT sees at least 7 or 8"ish, with shadowing/enhancement included. Wouldn't surprise me to see Littleton, NH come in with 7" while LSC sees 12"...and meanwhile you're making nude snow angels with 18" up high lol

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I am excited to see these runs but like I said 2 days ago. I am waiting until Christmas runs to throw out amounts. It's still an evolving situation. Safe to say NNE looks fantastic anyway.

Yeah I gotta catch myself...two days of model runs can change a lot. This could still end up jackpotting you to Bob.

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Nice...I'm liking 8-14" here honestly but I'll ramp up if this holds.

The NW deform band as SE flow aloft runs into a more NE turning NW flow in the low levels could be very productive. Also temps in snow growth region look optimal up this way.

Then once the flow backs NW, we'll clean up quietly while everyone else stops snowing. That'll boost storm totals an extra several inches as per the Greens SOP.

Already a pretty nice signal showing up in the SREF products for DGZ depths of 50-100 mb. Once you're pushing triple digits that's when you'll start seeing real healthy (i.e. 20:1) ratios.

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I am excited to see these runs but like I said 2 days ago. I am waiting until Christmas runs to throw out amounts. It's still an evolving situation. Safe to say NNE looks fantastic anyway.

Agree, but I think there is enough support for first forecasts 54-60 hours out. It will change for sure. What is discussed here and what would be told publicly are two totally different things.

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Okay, I had 128 as really going to Concord area.

I generally agree with you, but there are many times that the Lexington/Burlington area taints and we stay frozen. For example, in last week's icing event we did not go above freezing until well into the morning whereas the 128 towns went above in the early morning hours. Typically, I like to go with a blend of 495 and the 128 forecasts. Often the dividing line is the hill in Lincoln on route 2 near the gas station.

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