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Atlantic Tropical Action 2011 - Part III


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I understand M-F's old school displeasure with gales of tropical origins being labelled storms, but do we wanna get too complex, tropical depressions, tropical gales, tropical storms, hurricanes, super-hurricanes?

Besides, look back on Hurricane Humberto, and see how quickly that tropical gale spun up into a hurricane. An extra couple of hours over water, or landfall 50 miles down the coast (or both), that could have been a big deal.

Not super enthusiastic about marginal systems like Cindy getting a name, but if it meets the accepted criteria, well, what can they do? If they didn't name it someone else would complain.

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Frank comes from a heartier generation; one that defines "storm" as more than some nickel and dime disturbance that after microscopic examination is found to have a few acres of 35kt winds.

Outside the limited tropical cyclone world, the word "storm" refers to serious weather. When folks in the Mid-Atlantic or Northeast (or most the world for that matter) see a gale get upgraded to a storm, they know they're in for some big-time weather. The word "storm" has a place in everyday vernacular; and more specifically, for mariners and coastal residents the word "storm" refers to cyclones with winds 50 knots or greater.

But in the tropics? As soon as there's a cluster of clouds people pull out their magnifying glasses in search of any spot with 35 knot winds - and whey they find it they bestow a name on it, no matter how wretched the creature is. I've seen tropical storms make landfall in the Gulf states with winds no stronger than what I may get from a stiff sea breeze on a hot summer day!

What's happened over the years is the "tropically anal" people have diluted the meaning of the word "storm" down to a minimal threshold; they've so diluted the test that almost anyone can pass. Well.....school wasn't always that way.

pimp.gif

You do bring up an interesting point... why is 35 knots or 39mph designated as the tropical storm threshold. If mariners were only concerned with "storms" that got above 50 knots, why didn't we (the scientific community) put the tropical storm threshold at that value? Perhaps its worth digging up why the value was choosen.

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Frank comes from a heartier generation; one that defines "storm" as more than some nickel and dime disturbance that after microscopic examination is found to have a few acres of 35kt winds.

Outside the limited tropical cyclone world, the word "storm" refers to serious weather. When folks in the Mid-Atlantic or Northeast (or most the world for that matter) see a gale get upgraded to a storm, they know they're in for some big-time weather. The word "storm" has a place in everyday vernacular; and more specifically, for mariners and coastal residents the word "storm" refers to cyclones with winds 50 knots or greater.

But in the tropics? As soon as there's a cluster of clouds people pull out their magnifying glasses in search of any spot with 35 knot winds - and whey they find it they bestow a name on it, no matter how wretched the creature is. I've seen tropical storms make landfall in the Gulf states with winds no stronger than what I may get from a stiff sea breeze on a hot summer day!

What's happened over the years is the "tropically anal" people have diluted the meaning of the word "storm" down to a minimal threshold; they've so diluted the test that almost anyone can pass. Well.....school wasn't always that way.

<img src="http://208.71.34.143/public/style_emoticons/default/pimp.gif" />

This is a profoundly stupid post.

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Not very enthused with the future prospects of the Atlantic wave. Westerly shear should increase in a couple days as this gains latitude and the low-level easterly flow accelerates due to a combination of the subtropical ridge strengthening and the suppressed, easterly phase of the Kelvin wave. There's also an upper-level trough feature down the road as well. The global model support is lacking, and this faces a potential interaction with Hispaniola.

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I don't post much on TC's but I wanted to chime in on the whole 70's debate. It seems that with the technology we have now we are better able to identify TC's. Why in the world would we not want to start classifying them correctly. In 20-30 years we will have a whole new set of good data to compare hurricane seasons against each other with. The idea we should not scrutinize TC's to accurately identify their strength is ludicrous. If we continue to use old technology we will never have accurate season totals to compare with. With the way we look at storms today at least we will eventually have accurate numbers. Sure it will take time to get enough years of correct data but so what, it is better than the alternative imo. Why continue to classify storms incorrectly when we are perfectly capable of doing a better job today. As Phil said look at the correct data as far back as we can and eventually things over time will work themselves out.

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I understand M-F's old school displeasure with gales of tropical origins being labelled storms, but do we wanna get too complex, tropical depressions, tropical gales, tropical storms, hurricanes, super-hurricanes?

Besides, look back on Hurricane Humberto, and see how quickly that tropical gale spun up into a hurricane. An extra couple of hours over water, or landfall 50 miles down the coast (or both), that could have been a big deal.

Not super enthusiastic about marginal systems like Cindy getting a name, but if it meets the accepted criteria, well, what can they do? If they didn't name it someone else would complain.

Oh I wasn't suggesting we change the nomenclatures (that would be more trouble than it's worth,) I was just noting how the criteria (itself subjective) has changed. And my comment was not directed towards anything this year (because I've paid scant little attention to the junk out there so far) but to storms in years past when I did follow closely even the bottom of the barrel stuff.

When one refers to a storm (tropical or otherwise) one is describing a thing. And the definition needs be useful to people. Since the dawn of civilization, people have come to know what a storm is. I could say "it snowed yesterday" or I could say "we had a snowstorm yesterday"; and anyone who knows anything about snow would know the difference - despite the fact there is no scientific difference (it's all in the vernacular of course.)

With oceanic systems we have a bunch of categories. We place delimiters (or definitions) on them but in the end their application is subjective and arbitrary.

Small craft advisory today? "Well...the winds meet the criteria but they won't be sustained long enough to generate seas dangerous for small boats....so let's just skip it." Judgment calls like that are made every day. Gale warning or Storm warning? Ditto.

Tropical Storm or not a Tropical Storm? Does it have a broad wind field that meets criteria or is it 35kts in a tiny area and 15kts everywhere else? How much of a wind field is required? Is it producing unusual seas? If so, how high and in how many quadrants?

See where this is going?

I would suggest that throwing a name on something simply because an obscure 35kt wind is found somewhere out in the middle of nowhere...is not science, it is nonsense. A storm is not a formula, it's a dynamic physical thing. By putting every disturbance under a magnifying glass and tossing out humanity's view of what a storm is - we end up creating a new reality just to satisfy record keeping.

pimp.gif

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See where this is going?

I would suggest that throwing a name on something simply because an obscure 35kt wind is found somewhere out in the middle of nowhere...is not science, it is nonsense. A storm is not a formula, it's a dynamic physical thing. By putting every disturbance under a magnifying glass and tossing out humanity's view of what a storm is - we end up creating a new reality just to satisfy record keeping.

pimp.gif

I could not disagree more with this post.

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I don't post much on TC's but I wanted to chime in on the whole 70's debate. It seems that with the technology we have now we are better able to identify TC's. Why in the world would we not want to start classifying them correctly. In 20-30 years we will have a whole new set of good data to compare hurricane seasons against each other with. The idea we should not scrutinize TC's to accurately identify their strength is ludicrous. If we continue to use old technology we will never have accurate season totals to compare with. With the way we look at storms today at least we will eventually have accurate numbers. Sure it will take time to get enough years of correct data but so what, it is better than the alternative imo. Why continue to classify storms incorrectly when we are perfectly capable of doing a better job today. As Phil said look at the correct data as far back as we can and eventually things over time will work themselves out.

No one is suggesting we use old technology.

That we find more storms today due to better technology is a simple fact. And as you noted, the data will average out over time.

The only question some people have is; just exactly what is a storm?

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I would suggest that throwing a name on something simply because an obscure 35kt wind is found somewhere out in the middle of nowhere...is not science, it is nonsense. A storm is not a formula, it's a dynamic physical thing. By putting every disturbance under a magnifying glass and tossing out humanity's view of what a storm is - we end up creating a new reality just to satisfy record keeping.

:axe:

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No one is suggesting we use old technology.

That we find more storms today due to better technology is a simple fact. And as you noted, the data will average out over time.

The only question some people have is; just exactly what is a storm?

Again I'm new to the science of TC's but the way I understand it there is specific criteria. A closed circulation with x amount of wind speeds is how they are classified. It actually seems quite simple and not subjective at all given enough data. Warm Core/Cold core comes into play also but again with the amount of data we can gather today it's pretty straight up.

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Again I'm new to the science of TC's but the way I understand it there is specific criteria. A closed circulation with x amount of wind speeds is how they are classified. It actually seems quite simple and not subjective at all given enough data. Warm Core/Cold core comes into play also but again with the amount of data we can gather today it's pretty straight up.

I think it was a couple of years ago, JB was all inflamed, there was something off the SE Coast not upgraded after recon because NHC declared it was frontal, despite having a warmer center flight level, and no obvious wind direction/dewpoint/temp discontinuities which suggested a front anyway from scanning the HDOBs. I don't remember which year, but I'm guessing either 2007 or 2009, if that rings any bells. (Not his 'Jersey Devil')

JB is always closed circulation, gales over one quad, over water warmer than 25 or 26ºC, name it.

Which is funny, because I made a point of checking his Twitter and he thought Cindy shouldn't be upgraded and was a waste of a name...

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If a system meets the scientific definition of a tropical storm, then it gets classified as such and gets a name... period... and that's the way it should be.

I completely agree. A TC should be identified if it exists anywhere in the ocean because it gives us a more realistic history of what actually happened. Identifying all TC's in any given season is also important for calculating the Tropical ACE index.

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It merely reflects my personal view. Of course you have yours and so on across the board.

If I made a few people pause and think (even if off on a tangent) then it was worth my time.

sun.gif

That's why we need science...objective guidelines, not personal opinions... I don't want to research and need to check if it was a storm for someone specific.

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I understand M-F's old school displeasure with gales of tropical origins being labelled storms, but do we wanna get too complex, tropical depressions, tropical gales, tropical storms, hurricanes, super-hurricanes?

Besides, look back on Hurricane Humberto, and see how quickly that tropical gale spun up into a hurricane. An extra couple of hours over water, or landfall 50 miles down the coast (or both), that could have been a big deal.

Not super enthusiastic about marginal systems like Cindy getting a name, but if it meets the accepted criteria, well, what can they do? If they didn't name it someone else would complain.

and heres how I would classify each category

tropical depressions 20mph to 35mph

tropical gales 40mph to 50mph

tropical storms 55mph to 70mph

hurricane 75mph to 110mph

major hurricane 115mph to 145mph

super hurricane 150mph+

how would that be Ed

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It merely reflects my personal view. Of course you have yours and so on across the board.

If I made a few people pause and think (even if off on a tangent) then it was worth my time.

sun.gif

and heres how I would classify each category

tropical depressions 20mph to 35mph

tropical gales 40mph to 50mph

tropical storms 55mph to 70mph

hurricane 75mph to 110mph

major hurricane 115mph to 145mph

super hurricane 150mph+

how would that be Ed

What's going on? :unsure:

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Recon may go Sunday for P07L

WEATHER RECONNAISSANCE FLIGHTS

NATIONAL HURRICANE CENTER, MIAMI, FL.

1100 AM EDT THU 21 JULY 2011

3. ADDITIONAL DAY OUTLOOK: POSSIBLE LOW LEVEL INVEST AT 24/1800Z NEAR 21.0N 69.0W.

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Recon may go Sunday for P07L

WEATHER RECONNAISSANCE FLIGHTS

NATIONAL HURRICANE CENTER, MIAMI, FL.

1100 AM EDT THU 21 JULY 2011

3. ADDITIONAL DAY OUTLOOK: POSSIBLE LOW LEVEL INVEST AT 24/1800Z NEAR 21.0N 69.0W.

http://wwwghcc.msfc.nasa.gov/cgi-bin/get-goes?satellite=GOES-E%20HURRICANE&lat=13&lon=-52&info=vis&zoom=1&width=1024&height=768&type=Animation&quality=90&numframes=10

Looks pretty legit.

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There is a reason why they are called MAXIMUM sustained winds, not most of the winds are around this value. Why does it make logical sense? Because this way, you can warn individuals about the worst potential threat, rather than guessing that most people will be affected by the less threatening part of the storm. You can argue all you want about what wind threshold is considered dangerous to a person, but using maximum sustained winds (be it gusts or wind averages) to identify a storm is pretty much accepted universally.

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and heres how I would classify each category

tropical depressions 20mph to 35mph

tropical gales 40mph to 50mph

tropical storms 55mph to 70mph

hurricane 75mph to 110mph

major hurricane 115mph to 145mph

super hurricane 150mph+

how would that be Ed

The current system works well enough.

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