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General Severe Weather Discussion 2018


weatherwiz

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  On 6/18/2018 at 7:45 PM, tamarack said:

TOR warning for Lincoln, NH and environs - storm looks to be coming straight down Rt 116 from Kinsman's Notch.  Would losing 1,000+ ft elev in a dozen miles keep a funnel from touching ground, or have no effect?

Nice line of showers moving into central Maine from the mts, though all the pretty colors separated and went N & S of the home front - doubt if we got more than a tenth or so.

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  On 6/18/2018 at 7:48 PM, dendrite said:

It may intensify it as it stretches and tightens. 

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I had always thought going down the slope would help stretch an updraft, but I think latest research is showing mesos tightening up as they move up the slope instead. 

Loon webcam is down now. :o

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  On 6/18/2018 at 6:28 PM, weatherwiz said:

RAP/HRRR continue to really suggest enlarging hodographs as we move into the evening as stronger winds aloft move in. Also looks like a surge of higher theta-e air moving into western areas with a push of higher low-level moisture. that could help keep instability up there even for a few hours after sunset. Too bad lapse rates are awful but if some cell can get some updraft enhancement it will have lots to work with. 

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but only after buying 'er supper -

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  On 6/18/2018 at 7:50 PM, OceanStWx said:

 

I had always thought going down the slope would help stretch an updraft, but I think latest research is showing mesos tightening up as they move up the slope instead. 

Loon webcam is down now. :o

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All youtube live broke for me just as the storm went by.  Now of course it's back :(

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  On 6/18/2018 at 7:50 PM, OceanStWx said:

 

I had always thought going down the slope would help stretch an updraft, but I think latest research is showing mesos tightening up as they move up the slope instead. 

Loon webcam is down now. :o

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Cool. Learn something new everyday. 

edit...I haven’t seen the research, but is it some sort of frictional cyclonic aid deal? Then on the downstream side the friction is temporarily lost favoring anticyclonic behavior? Or is it something different altogether?

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  On 6/18/2018 at 9:05 PM, dendrite said:

Cool. Learn something new everyday. 

edit...I haven’t seen the research, but is it some sort of frictional cyclonic aid deal? Then on the downstream side the friction is temporarily lost favoring anticyclonic behavior? Or is it something different altogether?

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I'm going to have to find that research now (maybe NROW?), but I can't recall exactly the mechanism, I just remember being surprised.

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