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Dec 9-10 storm threat


ORH_wxman

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Well nstar had a planned outage from 1am which ended up lasting 12 hours. Nice to have the house warm back up. Crazy folks who want unplanned power losses......

Im with ginxy. This is a fascinatingly crazy evolution and that alone is worth tracking despite no real expectation of much aside from rain and wind and maybe some oes tomorrow and minimal front end frozen overnight towards Tuesday. These evolutions become possible in sh'tty patterns when you get such a strong cold island north of us.

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BTV issues a Watch...

...WINTER STORM WATCH IN EFFECT FROM TUESDAY MORNING THROUGHWEDNESDAY AFTERNOON...THE NATIONAL WEATHER SERVICE IN BURLINGTON HAS ISSUED A WINTERSTORM WATCH...WHICH IS IN EFFECT FROM TUESDAY MORNING THROUGHWEDNESDAY AFTERNOON.* LOCATIONS...CENTRAL AND NORTHERN VERMONT AND NORTHERN NEW YORK  EXCEPT THE ST. LAWRENCE VALLEY.* HAZARD TYPES...HEAVY WET SNOW...SLEET...AND FREEZING RAIN.* ACCUMULATIONS...POTENTIAL FOR 6 TO 12 INCHES OF SNOW WITH  LOCALLY HIGHER AMOUNTS IN THE SOUTH CENTRAL GREEN MOUNTAINS.  THERE MAY ALSO BE UP TO A QUARTER OF AN INCH OF ICE IN EASTERN  VERMONT.* MAXIMUM SNOWFALL RATE...UP TO 2 INCHES PER HOUR...MAINLY  WEDNESDAY AFTERNOON THROUGH WEDNESDAY EVENING.
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Exactly,would be nice but eventually it will snow a lot

 

Ginxy, Joe DeLeo is in your corner as well with the blocking idea...says the storm is cut-off(obviously), but also blocked by Southern Canadian High Pressure. Says it is going to be a Major Storm...(JB says the real deal)..with High wind driven rain and Monstrous snows. A very long evolution/duration storm.

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Well they do real well on a NE wind at H85...real well. That to them is like a SE flow to Sunday River. That's why Whiteface got 3 feet on Memorial Day a couple years ago...prolonged NE flow. It's not even SLK as much but those eastern high peaks would get absolutely slaughtered in that ECMWF solution.

 

Yeah there's basically no NW upslope flow on the Euro lol.

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Ginxy, Joe DeLeo is in your corner as well with the blocking idea...says the storm is cut-off(obviously), but also blocked by Southern Canadian High Pressure. Says it is going to be a Major Storm...(JB says the real deal)..with High wind driven rain and Monstrous snows. A very long evolution/duration storm.

 

 

There's no true upper air block though like you often see in other monster storms...this is mostly due to just cutting off from the polar jet. The April 1997 storm did this...no real blocking for that storm either.

 

This storm has reminded some of us of a spring cutoff setup.

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Powder',  ... my issue is with tainting/spinning truth of a depiction relative to one's desires, up or down... It's the "act" of doing, not the up or the down.  And, motives being transparent despite the posters attempt to keep their bias concealed... that is ad nauseam. And, I argue that it is detectable -- even in the lesser communicative anonymity of the internet, you can see by word choice and "cadence" (if you will..) 

 

Will, Exactly!  I was thinking the same thing, that as we wring hands trying to eek a snow event out of a chicken schit, if it wasn't for this cut-off event we'd be talking one helluva extended, balmy Indian Summer.  This also hearkens back to my idea from yesterday, that this thing is acting very much like a cut-off spring April type west Atlantic gyre.  At lot of spring heat wave cancels have taken place in the past over tuck-in cut-offs that rattle around inside a much large scaled ridge tendency.  It's not an exact analog, of course.. it just sort of smacks as that.   Heck, 168 hours out and the oper. Euro still has this thing whirling around E of the MA, though in a weakened ineffectual form. 

 

Did you guys see the 18z NAM?   It actually wraps a new low back NW over the top of the closed low, and punches a new QPF max through southern NH/VT.  Interesting...

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Yes Will. This is more cutoff bootleg ridging to the north, but not a block. Those pretty reds indicate higher than normal heights, but it's not a block. Sometimes those higher heights above a cutoff low can help with keeping the cutoff in place.

 

 

Yeah, really what the height anomalies indicate is that the polar jet has retreated much further north than normal which leaves the cutoff behind and nothing to really kick it out...it's not blocked in the sense that a Feb 78 was blocked or a Feb '69 was blocked...it is simply cutoff and left behind by a retreating poleward PJ.

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no Tip we didn't see it

 

What ?   

 

whatever that means ... Anyway these better resolved model types (smaller mesh) might be able to cut through clatter, and it is entirely possible that these might first detect (save for the "Can'tnadian") just such a scenario where a first low was over-cooked all along.   

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Yes Will. This is more cutoff bootleg ridging to the north, but not a block. Those pretty reds indicate higher than normal heights, but it's not a block. Sometimes those higher heights above a cutoff low can help with keeping the cutoff in place.

[/quote

Joe Deleo calls it Blocking High pressure....his words not mine. You call it Bootleg Ridging. Something is in this things way in addition to it being cut off...hence it's being blocked from moving NNE and away from the area. Whatever words or phrase we choose to use to put a name on it probably doesn't matter. What matters is it's not able to move on a traditional path...hence it's Blocked. Yes it's not a traditional -NAO like we like to see, but it's a Banana High, blocking the system from moving away.

And isn't Blocking nothing more than HP/higher than normal heights in the artctic regions...aka Greenland, Northern Alaska, North Pole.?

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