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November 2019 discussion


weathafella
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3 hours ago, weathafella said:

And for the record-normal first freeze at KBOS is 11/7.

Amazing what it takes now to get normal cold-seasonal related events to happen, and happen when they are supposed to. I submit we may achieve that this year, with a -2 SD pattern. 

I have a rude awakening message for folks... if it were not for these EPO explosions we've been dappling along the time lines of recent decades, winters would already be hugely stressed. But they are offsetting in a peculiar way.  It's either +10 at all times, or -20 ... but fewer COL times that happen to situated normalcy.    

..not exactly ..just making the point... 

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1 hour ago, ORH_wxman said:

If you don't radiate then it's even a bit late for freeze. But the Lowell coop up there actually had first freeze 10/6. That's earlier than their 10/14 average. But they are clearly a rad spot. 

I am around 170-180 ft, at the bottom of Fox Hill and further SW Billerica center which are like 250 350'+. I do radiate but it's not a hole. It seems late for not hitting 32.

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5 minutes ago, Dr. Dews said:

I am around 170-180 ft, at the bottom of Fox Hill and further SW Billerica center which are like 250 350'+. I do radiate but it's not a hole. It seems late for not hitting 32.

I'm 145 feet and further southwest and have 5 readings at or below 32.  I would think you would have had at least 1 or 2 by now.   

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16 hours ago, Mr. Kevin said:

Hi john. I am from Arkansas. I have a question. What do we need to see take place for the flow to slow down from being so fast like you have mentioned many times so far. Is it a -nao or more than that?

Hello Kevin, 

Unfortunately, the more formulative explanation requires one has had comprehensive and most importantly, learned exposure to a rather vast array of geophysical backgrounds - from academia to the frontiers of environmental observation and research. 

Firstly, this is not simply a matter of the North Atlantic Oscillation.  The NAO can ephemerally increase the overall mid tropospheric wind velocities ( usually more over regions of the continent east of your longitude..). However, those periods tend not to last more than 7 to 10 days in most extreme cases.  It may also recur after a relaxed intersession, when less height compression mid level winds are observed, and then as the index renews its descent, flow speeds again ... etc. That whole phenomenon is different than what is happening globally at mid latitude.

First, one needs to understand why the flow can be fast or slow. When you see a shorter distance between the geopotential lines on a standard 500 mb level chart, that means there are faster wind speeds taking place.  When the gaps widen...the opposite is true.  In the case of the NAO above,  heights usually lower over eastern Ontario, as they do, this introduces more lines ( which is a reflection of increasing gradient )  to the chart between that region and the mid Atlantic latitudes. Increasing the lines/gradient --> increasing the wind flow.  When height rise over eastern Ontario, naturally the opposite occurs.   

What you are asking has an answer that not found in that paragraph.   It's a global distinction having to do with warming the tropical band that encircles the global, and then having it begin to expand width. As it does, heigths at mid latitudes either have to rise with it, or, increase in gradient.   

In the N.H. Summer ( same in theirs..) this is not as noticeable. In fact, at times this tropical/sub-tropical band ( known as the 'Hadley Cell') will even blend with the gener R-wave layout and it's amorphous - you might think of summer as having lighter winds.  Then, the ensuing autumn begins to see the heights lower up N first of course, and as that expands south this 'ballooned' HC is not reducing as it used to, decades ago, because of the resident nature of the whole warming atmosphere.  That is creating the onset of the surplus gradient at mid latitudes.  

Hopefully from this you can get some idea why this is happening - difference with the NAO.   "What we need to see take place" is cool the whole HC - 

 

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Just now, Typhoon Tip said:

Hello Kevin, 

Unfortunately, the more formulative explanation requires one has had comprehensive and most importantly, learned exposure to a rather vast array geophysical backgrounds - from academia to the frontiers of environmental observation and research. 

Firstly, this is not simply a matter of the North Atlantic Oscillation.  The NAO can ephemerally increase the overall mid tropospheric wind velocities ( usually more over regions of the continent east your longitude..). However, those periods tend not to last more than 7 to 10 days in most extreme cases.  It may also recur after a relaxed intersession, when less height compression mid level winds are observed, and then as the index renews its descent, flow speeds again ... etc. That whole phenomenon is different than what is happening globally at mid latitude.

First, one needs to understand why the flow can be fast or slow. When you see a shorter distance between the geopotential lines on a standard 500 mb level chart, that means there are faster wind speeds taking place.  When the gaps widen...the opposite is true.  In the case of the NAO above,  heights usually lower over eastern Ontario, as they do, this introduces more lines ( which is a reflection of increasing gradient )  to the chart between that region and the mid Atlantic latitudes. Increasing the lines/gradient --> increasing the wind flow.  When height rise over eastern Ontario, naturally the opposite occurs.   

What you are asking has an answer that not found in that paragraph.   It's a global distinction having to do with warming the tropical band that encircles the global, and then having it begin to expand width. As it does, heigths at mid latitudes either have to rise with it, or, increase in gradient.   

In the N.H. Summer ( same in theirs..) this is not as noticeable. In fact, at times this tropical/sub-tropical band ( known as the 'Hadley Cell') will even blend with the gener R-wave layout and it's amorphous - you might think of summer as having lighter winds.  Then, the ensuing autumn begins to see the heights lower up N first of course, and as that expands south this 'ballooned' HC is not reducing as it used to, decades ago, because of the resident nature of the whole warming atmosphere.  That is creating the onset of the surplus gradient at mid latitudes.  

Hopefully from this you can get some idea why this is happening - difference with the NAO.   "What we need to see take place" is cool the whole HC - 

 

Hello Tip

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56 minutes ago, weathafella said:

It does?

How many times do we read his posts of standing on the side of a highway with his Polaroid camera, hair tied in a pony tail with his sleeves rolled up, ready for severe....only to be followed with subsequent posts so angered that another line failed to produce anything more than a grey cloud farting an occasional sprinkle. 

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1 minute ago, RUNNAWAYICEBERG said:

How many times do we read his posts of standing on the side of a highway with his Polaroid camera, hair tied in a pony tail with his sleeves rolled up, ready for severe....only to be followed with subsequent posts so angered that another line failed to produce anything more than a grey cloud farting an occasional sprinkle. 

Nothing will ever beat him selling hot dogs at the local high school baseball game when he could have been chasing in southern MA on 6/1/11

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37 minutes ago, RUNNAWAYICEBERG said:

How many times do we read his posts of standing on the side of a highway with his Polaroid camera, hair tied in a pony tail with his sleeves rolled up, ready for severe....only to be followed with subsequent posts so angered that another line failed to produce anything more than a grey cloud farting an occasional sprinkle. 

Finishing every chase with just a shelf cloud pic is kinda like going home with a girl and only getting a grinding with all clothes on.

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