Re: 12/16 to 12/17 Godzilla - 1st Call Snow Map

by **CPcantmeasuresnow** Tue Dec 15, 2020 7:09 am

@docstox12 wrote:This stubborn GFS is reading that high pressure which could suppress this storm much further south.Glad the other models disagree, but would like to see this cave over the next 24 hours.Bad memories of that "snowmageddon" year when NYC didn't see a flake while Philly got over 20 inches.

GFS already making moves Doc. You see that 12 from this mornings GFS run right over Monroe/Highland Mills. We haven't seen anything close to that from GFS regarding this storm. IT even has a 6 up past Hyde and Jim where it's been insistent in past runs accumulating snows wouldn't even make it that far north.

We seem to be in a 12-24 inch range on every model now. I never spike the football until my yardstick goes in the ground to verify but after last nights 0Z suites and this mornings GFS I'm starting to breathe a little easier.

Also remember this is 10:1 ratios, in the HV ratios should be more in the 12:1 to 14:1 range.

12/16 to 12/17 Godzilla - 1st Call Snow Map - Page 3 Gfs_as15

by **sabamfa** Tue Dec 15, 2020 7:14 am

@phil155 wrote:
@SoulSingMG wrote:Good morning! We are locked in for what looks like will be our most impactful storm since Jan 2016:

This map makes me wonder just what to expect in the areas with extreme impacts.... Also wondering about potential mixing issues in middlesex county and the impact that will have on totals

Same. Looks like I’m in or bordering one of those purple areas.

by **Frank_Wx** Tue Dec 15, 2020 7:26 am

12/16 to 12/17 Godzilla - 1st Call Snow Map - Page 3 F76C1B35-6340-4282-B2C8-5A6182F541CC.png.8d167d2d90308f87bd980d4e10e117b4

The biggest open question is where exactly do the mid level lows track. Yesterday, they stayed south then scooted east off the coast, which allowed for heavy bands of snow to sit and rot over the area (deform). This morning, the 700mb low track right over NJ, which means dry slotting for the state including NYC on east. It also means more rain for the Jersey shore. What a huge difference! 06z euro snow map posted above

by **Frank_Wx** Tue Dec 15, 2020 7:27 am

Notice how the axis of heaviest snow moves back into central PA. Just when we thought there was some model agreement yesterday, we actually do not with about 1.5 days to go.

by **heehaw453** Tue Dec 15, 2020 7:28 am

How's this for a snowfall gradient. Personally, IMBY and Lehigh Valley my over/under is 1' which is a crushing in my book and will be ecstatic for it. To render the prodigious amounts shown so much has to go right. The ULL must stay in just the right spot to the SE, no dry slotting, etc., etc.

Fun to track, but expectations are in check.

12/16 to 12/17 Godzilla - 1st Call Snow Map - Page 3 Nwssno10

by **Frank_Wx** Tue Dec 15, 2020 7:31 am

Here’s your difference. EPS vs GEFS. The low being over SNJ will mean much reduced snowfall for almost everyone on this board, exception being N&W, while GEFS outcome would give everyone a significant storm event.

12/16 to 12/17 Godzilla - 1st Call Snow Map - Page 3 9DDBEB39-5CD0-4E73-89F8-95A0FA9ED6ED.png.b87f7156c04f1998890ce394d6520587

12/16 to 12/17 Godzilla - 1st Call Snow Map - Page 3 9DDBEB39-5CD0-4E73-89F8-95A0FA9ED6ED.png.b87f7156c04f1998890ce394d6520587

12/16 to 12/17 Godzilla - 1st Call Snow Map - Page 3 3FE46FEC-6C4D-4311-BD67-69B84F642E23.png.d55472dd528c60d97dced5dcbdf6f813

by **heehaw453** Tue Dec 15, 2020 7:36 am

@Frank_Wx wrote:Here’s your difference. EPS vs GEFS. The low being over SNJ will mean much reduced snowfall for almost everyone on this board, exception being N&W, while GEFS outcome would give everyone a significant storm event.

I would split the difference ATTM. I think Jersey coast has a decent shot of getting more than progged now. Like LBI does much better than an inch kind of thing and wind up with 4-6".

by **algae888** Tue Dec 15, 2020 7:38 am

The 6z Euro came a little Southeast 12 to 18 in for most of the tri-state area what I think it has most correct is you're not going to see one foot totals near Albany or Southern Vermont and New Hampshire very short cut off on the Northern extent

by **algae888** Tue Dec 15, 2020 7:42 am

This is a from a met from another board he is an excellent forecaster.

I think you’re going to see a correction back southeast today as the arctic airmass that’s building into the region throughout the day begins to get ingested into the models.

The temp drops throughout the day today....

This airmass is very cold and dry as the storm approaches...DENSE.

The orientation of the high is a classic CAD over performing location for northeast/mid Atlantic...

I would strongly hedge higher than current guidance for snowfall amounts in LI/NYC area...

by **amugs** Tue Dec 15, 2020 7:47 am

@algae888 wrote:This is a from a met from another board he is an excellent forecaster.

I think you’re going to see a correction back southeast today as the arctic airmass that’s building into the region throughout the day begins to get ingested into the models.

The temp drops throughout the day today....

This airmass is very cold and dry as the storm approaches...DENSE.

The orientation of the high is a classic CAD over performing location for northeast/mid Atlantic...

I would strongly hedge higher than current guidance for snowfall amounts in LI/NYC area...

Al the inevitable NW ticks then to adjust SE then the track.
I just said this in a text to Mike P - adjust the models about 15-20 miles SE today and for teh storm and that is what you'll get - crippling blow could be to the City and NNJ

by crippo84 Tue Dec 15, 2020 8:01 am

I know this board hates to hear it, but TWC is all in on big snow into NYC metro with 12-18.

...running away now.

by DAYBLAZER Tue Dec 15, 2020 8:04 am

Morning all.

Great write-up Frank, and excellent analysis all around from you guys. Makes everything easy to understand for sure.

Looking forward to the model runs today. That being said, I've consistently been in the bullseye for highest snow totals here in NW NJ.

Now, being in the bullseye this far in advance has proven disastrous in the past, so I am managing my expectations accordingly. THAT being said, I really like what I see for Sussex NJ. I can't remember being in a better spot this late in the game.

by **jmanley32** Tue Dec 15, 2020 8:11 am

Okay so GFS finally caves but very concerning the SR models are now coming way far NW heaviest snows far far north. Looks like could even rain at coast?! Thought a? Northern people if the SR holds you guys may be the jackpot.

by **heehaw453** Tue Dec 15, 2020 8:15 am

Yes this is the surface low pressure, but it illustrates the point that 1-2 days out that there is not consensus within Euro ensembles ATTM. To me that is a big spread at this lead time.

12/16 to 12/17 Godzilla - 1st Call Snow Map - Page 3 Eps18

by **jmanley32** Tue Dec 15, 2020 8:21 am

@sabamfa wrote:
@phil155 wrote:
@SoulSingMG wrote:Good morning! We are locked in for what looks like will be our most impactful storm since Jan 2016:

This map makes me wonder just what to expect in the areas with extreme impacts.... Also wondering about potential mixing issues in middlesex county and the impact that will have on totals

Same. Looks like I’m in or bordering one of those purple areas.

what exactly is it saying extreme property damage in red and purple? From winds? Snow causing damage?

by elkiehound Tue Dec 15, 2020 9:11 am

Will this be wet and heavy or light and fluffy (Hunterdon county)? Thx

by **Scullybutcher** Tue Dec 15, 2020 9:16 am

@crippo84 wrote:I know this board hates to hear it, but TWC is all in on big snow into NYC metro with 12-18.

...running away now.

They have me at 7 - 14 now

by **essexcountypete** Tue Dec 15, 2020 9:19 am

@jmanley32 wrote:
@sabamfa wrote:
@phil155 wrote:
@SoulSingMG wrote:Good morning! We are locked in for what looks like will be our most impactful storm since Jan 2016:

This map makes me wonder just what to expect in the areas with extreme impacts.... Also wondering about potential mixing issues in middlesex county and the impact that will have on totals

Same. Looks like I’m in or bordering one of those purple areas.
what exactly is it saying extreme property damage in red and purple? From winds? Snow causing damage?

Just wondering the same thing jman. I read it out loud to my wife and were both like "Wahhhh"! It's worded in a way that seems more appropriate for a hurricane that a winter storm, and it seems a tad bit overblown.

by **aiannone** Tue Dec 15, 2020 9:22 am

12z NAM is ugly

12/16 to 12/17 Godzilla - 1st Call Snow Map - Page 3 13189210

by DAYBLAZER Tue Dec 15, 2020 9:27 am

yikes. Windshield wiper effect?

Now someone post another model that shows the opposite. Please (lol)

by **heehaw453** Tue Dec 15, 2020 9:29 am

If the lows (700/850) track that far north as shown by NAM then a lot of folks will be dry slotted and taint with sleet. This is NAM out of its good range, but nonetheless it's possible.

I guess the all bets are still on the table.

by **SoulSingMG** Tue Dec 15, 2020 9:30 am

@aiannone wrote:12z NAM is ugly

Yup. Not what I wanted to see at 12z day before storm. NAM can be deadly around now. smh.

by DAYBLAZER Tue Dec 15, 2020 9:32 am

It's amazing. In the span of 12 hours, we have worries about suppression and worries about the lows getting TOO far north....

by **jimv45** Tue Dec 15, 2020 9:32 am

Where is RB? the Nam plus others may be on to what he said might happen!!!

by dsix85 Tue Dec 15, 2020 9:33 am

It's one model run, as Aaron Rodgers so perfectly said.. "R-E-L-A-XXXXXXXXXXXXXXX"

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