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ORH_wxman

Dec 16-17 obs/nowcast thread

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44 minutes ago, Henry's Weather said:

Lucky I got the insurance of a coastal front. We're usually guaranteed to not suck subsidence here. About a foot on the ground and the snow is super heavy.

Screenshot_20201217-090831_Gallery.jpg

I lived in Brighton on Cambridge STreet during the great winters of 1993/94 and 1995-96; that is the one scene from those winters I don't miss...was tough owning a car those winters, got towed a time or two

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1 hour ago, JC-CT said:

Isn't that 10" total now? Or are we supposed to take the highest measured depth

I’m not a meteo, but I measure the open areas, and adjust on account of the drifts. It has kept snowing longer than I thought and willi is over 9” now at the River. 

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3 minutes ago, dendrite said:

27.8”...2.8” past hour

New depth is 25”

I’d kind of like to get up to about 600mb and float around in the frontogenetic circulation. 

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12 minutes ago, Typhoon Tip said:

You're scraping your way to a meager snow-life as a pedestrian deal ... while the rich like Brian trample on the bruised backs of the labors - lol...

Seriously though, this systems intensely banded nature is making the deposition layout very uneven. In a step-back larger 'physical' sense, ...take from one region, and load it into another - relative to this system's forcing, this stuff's gotta come from somewhere. 

I mean, we've got a 'yard-sticker' event up there in NY and frankly - was that even well handled?  I'm 'pretty sure' - though didn't pay very close attention admittedly ... - that NWS offices didn't have those regions ...you know, doing that ... But who knows..  But if you take half off their totals and up along this pig CEO band and spread it more 'fairly' and ubiquitously, the system ...we're all in for two footer.   It's interesting if one can disconnect disappointment and just look at it analytically actually ... Probably won't be able do that for about 9.4 years, or ironically the same total in snow inches we get in this ... gravity well ?

That's something I've wondering ...if the offset DVM imposed by a compensating standing wave is partly to blame for this rather striking systemic dearth in this zone, too -

When all is said and done there will likely be more than a foot in Methuen. NWS offices in several states are going to have some explaining  to do. As will TV mets in the Boston area.  The storm is going to be an interesting case study once all is said and done. 

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12 minutes ago, dendrite said:

My god this may be the heaviest I’ve seen it yet this morning. 16.5°F

The moment Dendy turned into Dave looking into the Jupiter monolith.

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17 minutes ago, DomNH said:

Really just weenie -SN that approaches moderate here and there. May be enough to eek us into double digits but mostly just mood snow at this point. 

Yeah here too now. Slot closed up enough for a tease, now back to watching it rip 5 miles north. 

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2 minutes ago, dryslot said:

Well this is fun

 

that band is awesome eh?  think about what the write up and maps of this storm will be.  a 30+ band that runs from central PA all the way through NY, across VT, NH and then maybe into ME.

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14 minutes ago, TheSnowman said:

12”, 10.5” Compact.  
 

And I NEVER got dryslotted, Never got into a subby zone...
 

...and it still took 14 hours to get 12”.  And the Radar is done here.  0.5” in the past 90 minutes so the radar has been done for a while.  

You have been whining since midnight CP

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Still an impressive amount here in Westford given we’ve been in that hole all morning. Must have been some good overnight rates. I didn’t measure, but there’s a spotter in town that had us at 9” this morning at 6. I would guess another 1 or 2 inches since then and still some light snow going on. 

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Update: the submission I posted a couple hours ago was premature and it has kept on snowing despite the radar-influenced expectation. 
 

At LEAST 8.5 inches now at the Riverside after measuring open areas and drifts over a foot. Not a history maker but a solid storm for Willimantic here. Nice drifts.

It’s no bust, but rather a modestly low-balled result 

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1 hour ago, bobbutts said:

Crushed..   Probably about 15"

Up to 17" now so roughly 2" per hour.  Great storm, enough snow so I don't even notice missing the jackpot.

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24 minutes ago, The 4 Seasons said:

Hey everyone when its all said and done plz send me your final reports when its all said and done. Taking a final measurement now as the snow is pretty much done.

I’ll let @Spanks45 give you the southbury ct usa report...his setup is legit. Trust that over mine. 

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I see what happened here...

ah - yeah...it's pretty obvious.  

Sparring a lot of thesaurus work - satellite really shows it all... There is a clear mid level rotation that's moving roughly ALB-RUT- ..destined to mid Coast Maine if it gets that far before it starts to open up and lose identity atoning to the models that sold that phenomenon leading up to this... Anyway, there is clearly a lower tropospheric low pressure SE of ISP by a few clicks ( dry air seclusion is noted on hi res vis)... 

Meanwhile, what separates these two is unsually cold air here in the interior.   It seems this system's losing mechanical punch - and the GFS ...albeit too aggressive in doing so, does get a nod for seeing this attenuation of the total wave-space mechanics leaving our skies...  But the forcing was split by the polar wedge, which is too damn strong/thick - this system didn't need 9 F DPs through 300 mb of the tropospheric lower sounding, and air temps hung up at 21 F to get the job done.  It was too much and as the SW come up and road over the N edge of that polar boundary's fascia wall, it didn't have the ability to cut the low level circulation through the viscus low level air... 

That's why this split happened... The snow/totals there in the SE are coming from a lower growth region in the sounding ( I bet ...) associated with their proximity to that low level cyclonic reflection ..probably entirely driven by 700 ( or so..) mb mechanics/ that is probably going to die off out there S of NS ... while the stuff up along the frontogen axis is purely a mid level blizzard overcoming the lower dry air... It's pretty cool to watch this happen..

I feel very confident if the mid level wind max/ DPVA trajectories were farther S along the actual polar interface/LLV thickness packing therein... you would have collocated that torsional energy with the low level and this would have been more of a 2005 idealized structure...   In a sense, this is like taking the 2005 Dec event and pulling it apart/stressing and tiling it's vertical structure... which unfortunately, creates this red-headed step-child negation band from NE CT to SE NH

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