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Jan 31/Feb 1 Clipper


Damage In Tolland

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Cobb for BDL


170131/1900Z  31  12005KT  24.9F  SNOW   14:1| 0.2|| 0.00|| 0.00|| 0.014   14:1|  0.2|
170131/2000Z  32  11005KT  24.9F  SNOW   14:1| 0.7|| 0.00|| 0.00|| 0.046   14:1|  0.9|
170131/2100Z  33  08006KT  24.9F  SNOW   14:1| 0.9|| 0.00|| 0.00|| 0.063   14:1|  1.7|| 0.00|| 0.00|| 0.12  100
170131/2200Z  34  07005KT  24.9F  SNOW   12:1| 0.5|| 0.00|| 0.00|| 0.045   14:1|  2.3|| 0.00|| 0.00|| 0.17  100| 
170131/2300Z  35  06005KT  25.1F  SNOW   11:1| 0.4|| 0.00|| 0.00|| 0.038   13:1|  2.7|| 0.00|| 0.00|| 0.21  100| 
170201/0000Z  36  05005KT  25.2F  SNOW    8:1| 0.2|| 0.00|| 0.00|| 0.029   12:1|  2.9|| 0.00|| 0.00|| 0.24  100|  
----------------------------------------------+----++-----+-------------++--------------++-------------++-----------+---+---
170201/0100Z  37  04004KT  25.6F  SNOW   10:1| 0.1|| 0.00|| 0.00|| 0.012   12:1|  3.0|| 0.00|| 0.00|| 0.25  100| 
170201/0200Z  38  05003KT  25.8F  SNOW   11:1| 0.1|| 0.00|| 0.00|| 0.005   12:1|  3.1|| 0.00|| 0.00|| 0.25  100|  
170201/0300Z  39  06003KT  25.6F  SNOW   15:1| 0.1|| 0.00|| 0.00|| 0.004   12:1|  3.2|| 0.00|| 0.00|| 0.26 

 

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7 minutes ago, CoastalWx said:

Some people  will get over 4" unless the models completely fail.

Yeah I'd be shocked if there weren't a few 4"+ lollis because someone is gonna get 0.25 of liquid and these ratios will be better than 15 to 1 probably...esp in any heavier bands with snow growth.

 

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Just now, Damage In Tolland said:

Snow advisories should be up with PM afd. And some small area will be upgraded to WSW after the snow is well underway. You can already envision it.

Be the future my friend. Tell us. 

Looks good for the state, I recall a clipper from 2015 that snuck up a bit and wrecked havoc during evening rush. Feeling something similar may occur. 

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3 minutes ago, RUNNAWAYICEBERG said:

Be the future my friend. Tell us. 

Looks good for the state, I recall a clipper from 2015 that snuck up a bit and wrecked havoc during evening rush. Feeling something similar may occur. 

I want something like that freak snow event in March '13 that ran north/south along the I91 corridor. Came out of nowhere and dropped a quick 4-5" and caused absolute chaos. I'd wager that one had Ryan scratching his head.

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I mentioned this late last evening ...the (then) NAM solution had a bit of a Norlund look to it.  Truth be told ...it's been in the cycles for a long time.  I just think it worth noting.

The idea of lower level pressure falls and convergence is present in many guidance. The NAM even weakly closes isobars near the Mass borders with NH/VT.  The cause for the surface trough appears to be in the particularly handling of mid level wavy dynamics.

24 or more straight hours of jet max ripping by to our south as others have noted. The equations of motion dictate that there should be a tendency for the flow to curl back east immediately on the polarward side of said channel of higher velocities aloft.  That cyclonic tendency imparts a steady upward motion (UVM, -omega...etc..); and, that requires lowering pressure near the surface up underneath the axis of rising air above.  

That convergence/pooling of moisture then forced to rise results in cloud and such.  Particularly because SNE sticks out over the ocean ... that convergence may include air source that is conditionally saturated... snow growth happens probably lower than the typical region of the sounding (700mb).  When this sort of pattern sets up...surprises can result.

I don't think very many IVT/"Norlund" type scenarios do very well to predict the actual extent of snow fall that has resulted.  It's just something to keep in mind. Also, keeping in mind that while flakes should be in the air for just about everyone in SNE at some point or the other ... if/when Norlund destines to over produce, history has shown that tends to take place in narrow bands close to the surface axis of convergence. It would be inherently difficult for the models to know where that axis will be. 

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16 minutes ago, Hoth said:

I want something like that freak snow event in March '13 that ran north/south along the I91 corridor. Came out of nowhere and dropped a quick 4-5" and caused absolute chaos. I'd wager that one had Ryan scratching his head.

Worst morning ever.

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20 minutes ago, ORH_wxman said:

Yeah I'd be shocked if there weren't a few 4"+ lollis because someone is gonna get 0.25 of liquid and these ratios will be better than 15 to 1 probably...esp in any heavier bands with snow growth.

 

Yeah agreed.  Probably all over New England.

This type of QPF possibility with that thermal profile will be a nice little event.

One of those where even like SVT up to Killington/Ludlow area could grab a 6-8" of fluff with that SE flow upglide into those temps.

gfs_tprecip_neng_14.png

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5 minutes ago, ORH_wxman said:

 

Mar' '13? what event was that?

Want to say it was like March 30 or 31st? Just a weird north/south oriented band that set up over I91 from Hartford to New Haven and caused chaos. I was driving back to Boston in it and was both weenieing out and freaking over the road conditions.

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20 minutes ago, ORH_wxman said:

 

Mar' '13? what event was that?

It wasn't much... we thought there could be a flip from rain to snow in the hills/Berkshires and instead it flipped to +SN on the I-91 corridor and dropped like 5" of snow in 90 minutes during the morning commute. My first inclination something was wrong was when I saw one of our cameras at BDL with 1/4SM +SN when I had said moments ago, "maybe a few flakes will mix in but it should just be rain".

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9 minutes ago, RUNNAWAYICEBERG said:

Its because you guys tricked him into Mar 13 not 14...so Will was right thinking "what event, that didnt happen in March '13" haha. 

Yeah I can't identify the event in March 2013 (there was actually a huge fluke snow on the south coast of MA I think on 3/22/13 from a norlun, but obviously that didn't affect the I-91 corridor)...in '14 there was an event on 3/31 I recall...big ULL, maybe thats the one.

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1 hour ago, RUNNAWAYICEBERG said:

Be the future my friend. Tell us. 

Looks good for the state, I recall a clipper from 2015 that snuck up a bit and wrecked havoc during evening rush. Feeling something similar may occur. 

 

3/20/15 perhaps? Not sure if it was a clipper...but my records show 4.1". Looks like a Friday afternoon/eve event.

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38 minutes ago, ORH_wxman said:

Yeah I can't identify the event in March 2013 (there was actually a huge fluke snow on the south coast of MA I think on 3/22/13 from a norlun, but obviously that didn't affect the I-91 corridor)...in '14 there was an event on 3/31 I recall...big ULL, maybe thats the one.

It was 2014

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