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January 4th Mothrazilla: Final Call & Observations

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January 4th Mothrazilla: Final Call & Observations  Empty January 4th Mothrazilla: Final Call & Observations

Post by Frank_Wx Wed Jan 03, 2018 5:06 pm

I mentioned this is the other thread but this is definitely one of the most challenging storms I've ever had to forecast. All week we've been pointing out how surface is not matching the upper air pattern. We were expecting bigger outcomes but the Global models kept showing a minor to moderate event. Since early this morning - the NAM - and some other models - have dramatically increased QPF. These mesoscale models tend to perform better with system where a lot of convection is jet dynamics are involved. The NAM closed off H5 this morning and even the Global models have come around to this idea today. However, they're still not showing the type of precip the NAM is. The latest GFS even throws more uncertainty into the wrench showing MIX for central LI and RAIN for eastern LI. This goes to show the west trend we've been seeing the last several days is real.

January 4th Mothrazilla: Final Call & Observations  Pmsl

The 500mb trough is going negative and you'll notice isobars associated with our storm are pointing more north than northeast. This is one piece of evidence the storm will track closer to the coast than where some Globals show.


January 4th Mothrazilla: Final Call & Observations  850mb_sf

The 850mb low (shown here) and the 700mb low will be key to follow. We want this features to stack over the 500mb low. The 500mb low is likely to close off early tomorrow morning near the BM. But some models put the 850/700mb low EAST of the 500mb low which keeps the heaviest banding / forcing confined to LI or off the coast entirely. Obviously higher snowfall rates will increase accumulation amounts. 

January 4th Mothrazilla: Final Call & Observations  IMG_0796.thumb.PNG.8966f403db8c42b96ba09266c490eb7c

Much of the 500mb PVA will stay over coastal NJ and Long Island. NYC may even get into some of it at times. The Hi-Res NAM does push it more west. This is where the forecast becomes most challenging. Where does the best banding set-up? 

January 4th Mothrazilla: Final Call & Observations  Northeast_loop

Precipitation is ahead of schedule. Early in means early out. I am thinking snow could break out, especially for southern areas, by 1am-3am then taper off between 3-5pm on Thursday. 


Here is my final call snow map. 

January 4th Mothrazilla: Final Call & Observations  Final_call


Based off the aforementioned observations this will be my final call. I will not adjust after the 00z runs tonight. Note: it is possible there could be shifts with the cut-off zones EITHER DIRECTION by as much as 25 to maybe even 50 miles. That's how much uncertainty there is at the moment with where banding sets up and how heavy the precip rates will be. It will be a fun one to track. 

Mothrazilla 2K18!

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Post by mikeypizano Wed Jan 03, 2018 5:10 pm

Still don’t like it frank, can you make me 12 inch plus?
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Post by frank 638 Wed Jan 03, 2018 5:11 pm

frank thank you for ur post and maps you put up even almost all weather stations are saying we will see 6 plus for the city and a foot for east of longisland

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Post by hyde345 Wed Jan 03, 2018 5:14 pm

That map makes a lot of sense Frank. Good call. This one has been tough.
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Post by Carter bk Wed Jan 03, 2018 5:16 pm

Like it frank but i really think the 10 to 15 should be from city east and is that with ratios

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Post by Guest Wed Jan 03, 2018 5:19 pm

Put a ruler down on the 10-15" line starting jersey shore into eastern LI and Ct. it takes a right over LI then back left enough in Ct just enough to miss me being in it by 2 miles. Done on purpose by our leader

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Post by Scullybutcher Wed Jan 03, 2018 5:21 pm

Love the map. Puts me in the 10 - 15. I hope it’s busts high but it will be moving at a good pace.
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Post by Guest Wed Jan 03, 2018 5:22 pm

You mean busts low scully. Frank and Scott have a habit of doing this. Lol

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Post by frank 638 Wed Jan 03, 2018 5:22 pm

even lonnie is saying manhattan will get 6 inches then brooklyn queens and the bronx will get 6 to 12 inches

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Post by Guest Wed Jan 03, 2018 5:23 pm

Bronx 2-4 and no wind

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Post by RJB8525 Wed Jan 03, 2018 5:28 pm

ohhh i'm at the line split between 1-3/3-6 lol hopefully i can squeak out 3"
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Post by Frank_Wx Wed Jan 03, 2018 5:28 pm

Carter bk wrote:Like it frank but i really think the 10 to 15 should be from city east and is that with ratios

Yes with ratios.

syosnow94 wrote:Put a ruler down on the 10-15" line starting jersey shore into eastern LI and Ct. it takes a right over LI then back left enough in Ct just enough to miss me being in it by 2 miles. Done on purpose by our leader

lol! not on purpose. But I do mention there could be 25 to 50 mile shifts in either direction. So you can consider yourself more in an 8-12 zone with 12+ possible. It's how you interpret the map Wink

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Post by Guest Wed Jan 03, 2018 5:31 pm

I was hoping it was in purpose. It's funny. I'm going 10-18" from NYC east

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Post by billg315 Wed Jan 03, 2018 5:37 pm

Solid map. I do think most in the 3-6 zone end up at or close to the 6” with a sharp drop off to 3 near the border wit the 1-3 zone.
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Post by amugs Wed Jan 03, 2018 5:47 pm

Excellent work. .
As Frank pointed out a w5 mile shift west with the trends so far would bring the entire NYC metro area in the Secs to mecs category. I think the HI RES NAM will verify and put us about 10-15 more miles west looking at convection and latest radar.

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Post by GreyBeard Wed Jan 03, 2018 5:48 pm

Like the map Frank, but a quick question. With forecast winds both during and after the storm, we could theoretically be looking at blizzard conditions all the way through the weekend,no?

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Post by Artechmetals Wed Jan 03, 2018 5:50 pm

Hi Frank we are about 11 miles apart are we in the 3 to 6 range ?
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Post by Frank_Wx Wed Jan 03, 2018 5:58 pm

GreyBeard wrote:Like the map Frank, but a quick question. With forecast winds both during and after the storm, we could theoretically be looking at blizzard conditions all the way through the weekend,no?

Yes, great point. Blowing and drifting snow. Extreme cold and high winds behind this storm. The aftermath will not be pretty.

Artechmetals wrote:Hi Frank we are about 11 miles apart are we in the 3 to 6 range ?

Yes but on the high end

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Post by amugs Wed Jan 03, 2018 6:00 pm

From Super storm Deep Thunder wow qpf
January 4th Mothrazilla: Final Call & Observations  0highthundermgweb_wrf_20180103-180000_aneus_empas_f00330000_pgeneraltotalprecip_r15km.jpg.a561f3ce6b2bfc01b1648ee5de515c3b

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Post by rb924119 Wed Jan 03, 2018 6:02 pm

Frank_Wx wrote:
Carter bk wrote:Like it frank but i really think the 10 to 15 should be from city east and is that with ratios

Yes with ratios.

syosnow94 wrote:Put a ruler down on the 10-15" line starting jersey shore into eastern LI and Ct. it takes a right over LI then back left enough in Ct just enough to miss me being in it by 2 miles. Done on purpose by our leader

lol! not on purpose. But I do mention there could be 25 to 50 mile shifts in either direction. So you can consider yourself more in an 8-12 zone with 12+ possible. It's how you interpret the map Wink

Taking the politically correct approach so as not to upset the tribe.....I respect it, I respect it ahahahaha jk, buddy, I like it! Personally, I think you can bank on that shift west versus east, and increase totals across EPa, but seeing as though I have not made a map myself, I will not nitpick lol I know you put a lot of work in with this, and for once, do not envy being in your position, as I know the despair of trying to decide on what to do all too well aha. This has been, and continues to be, a nightmare for all of us. That said, I think it's important that we recognize the fact that you are taking a stand and putting your thoughts out there for judgement, rather than broadbrushing. Bravo, and can't wait to see how this verifies!!! Great work!!

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Post by hyde345 Wed Jan 03, 2018 6:04 pm

I was looking at the water vapor loop and radar and man it looks impressive.
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Post by Frank_Wx Wed Jan 03, 2018 6:06 pm

rb924119 wrote:
Frank_Wx wrote:
Carter bk wrote:Like it frank but i really think the 10 to 15 should be from city east and is that with ratios

Yes with ratios.

syosnow94 wrote:Put a ruler down on the 10-15" line starting jersey shore into eastern LI and Ct. it takes a right over LI then back left enough in Ct just enough to miss me being in it by 2 miles. Done on purpose by our leader

lol! not on purpose. But I do mention there could be 25 to 50 mile shifts in either direction. So you can consider yourself more in an 8-12 zone with 12+ possible. It's how you interpret the map Wink

Taking the politically correct approach so as not to upset the tribe.....I respect it, I respect it ahahahaha jk, buddy, I like it! Personally, I think you can bank on that shift west versus east, and increase totals across EPa, but seeing as though I have not made a map myself, I will not nitpick lol I know you put a lot of work in with this, and for once, do not envy being in your position, as I know the despair of trying to decide on what to do all too well aha. This has been, and continues to be, a nightmare for all of us. That said, I think it's important that we recognize the fact that you are taking a stand and putting your thoughts out there for judgement, rather than broadbrushing. Bravo, and can't wait to see how this verifies!!! Great work!!

If the HRRR has it's way all western regions will see a few flakes. With ratios you may crack 1 inch.
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Post by rb924119 Wed Jan 03, 2018 6:07 pm

Looking at present WV imagery it looks to me like our establishing low-level circulation is on a "B" line directly WEST of Hatteras. If that trajectory maintains, my god......you'd have your best banding set up as far west as EPa.

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Post by rb924119 Wed Jan 03, 2018 6:13 pm

Frank_Wx wrote:
rb924119 wrote:
Frank_Wx wrote:
Carter bk wrote:Like it frank but i really think the 10 to 15 should be from city east and is that with ratios

Yes with ratios.

syosnow94 wrote:Put a ruler down on the 10-15" line starting jersey shore into eastern LI and Ct. it takes a right over LI then back left enough in Ct just enough to miss me being in it by 2 miles. Done on purpose by our leader

lol! not on purpose. But I do mention there could be 25 to 50 mile shifts in either direction. So you can consider yourself more in an 8-12 zone with 12+ possible. It's how you interpret the map Wink

Taking the politically correct approach so as not to upset the tribe.....I respect it, I respect it ahahahaha jk, buddy, I like it! Personally, I think you can bank on that shift west versus east, and increase totals across EPa, but seeing as though I have not made a map myself, I will not nitpick lol I know you put a lot of work in with this, and for once, do not envy being in your position, as I know the despair of trying to decide on what to do all too well aha. This has been, and continues to be, a nightmare for all of us. That said, I think it's important that we recognize the fact that you are taking a stand and putting your thoughts out there for judgement, rather than broadbrushing. Bravo, and can't wait to see how this verifies!!! Great work!!

If the HRRR has it's way all western regions will see a few flakes. With ratios you may crack 1 inch.

Lucky for me I actually despise that model. Every single time I look at it/use it I get burned. So I don't even bother, and therefore that solution doesn't exist ahaha

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Post by Scullybutcher Wed Jan 03, 2018 6:18 pm

syosnow94 wrote:You mean busts low scully. Frank and Scott have a habit of doing this. Lol

Yes. I want the most snow for everyone possible. It’s like turning the ac up or down always confusion.
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