Convective inhibition, significance to thunderstorms

[dave48]

Does anyone know exactly how significant CIN is to the development of thunderstorms? What are the sort of values that would generate different strengths of storms and what would be the sort of thresholds that would prevent them.

[Rustynailer]

This may help http://en.wikipedia.org/wiki/Convective_inhibition

A better more thorough explanation can be had from one of the Netweather forecast team mind B)

Russ

[johnholmes]

Does anyone know exactly how significant CIN is to the development of thunderstorms? What are the sort of values that would generate different strengths of storms and what would be the sort of thresholds that would prevent them.

its another 'new' term to explain what has been known all along.

difficult to give numbers and little to be gained from trying to use it.

simply use the t-phi or skew-t, use the dewpoint and max temp expected and that will show whether a parcel of air will rise or not, also how high it will rise before it becomes colder than the environment and thus unable to rise any more.

I'm happy to try and answer any questions by pm but I suggest you have a look in the Guides on the long thread trying to explain how a skew-t diagram works.

If you get stuck pm me and I'll try and help.

welcome to NW by the way, I'm sure you will enjoy it.

[dave48]

Thanks very much for your help guys , really appreciate it, found the skew t guide but having trouble opening from the third pictures onwards, is there anywhere else I can get that guide or way I can open the pictures in that one as it looks just the sort of thing I was looking for?

[johnholmes]

hi Dave

Not sure what the problem is, I'll scout through my pc files to see if I have the originals. Otherwsie it will have to wait until Paul comes back althoughKarl(IF UOU READ THIS??) might be able to help.

sorry about that, I'll come back later today hopefully with the original files.

Otherwise are you able to follow what I'm trying to get across?

[grab my graupel]

hi Dave

Not sure what the problem is, I'll scout through my pc files to see if I have the originals. Otherwsie it will have to wait until Paul comes back althoughKarl(IF UOU READ THIS??) might be able to help.

sorry about that, I'll come back later today hopefully with the original files.

Otherwise are you able to follow what I'm trying to get across?

Hi John

I would be very grateful also, if you are able to sort this problem

I had the same difficulty when I was wanting to read the above yesterday evening. I am trying to get to grips with reading

these Skew Ts myself, at the moment, particulary since you highlighted to me recently, what a useful forecasting tool they are.

Much appreciated

Brian.

[NL]

In the mean-time maybe this link will be useful.

http://www.geo.mtu.edu/department/classes/ge406/cledlin/

[grab my graupel]

In the mean-time maybe this link will be useful.

http://www.geo.mtu.edu/department/classes/ge406/cledlin/

Thanks for that Looks like my evening is sorted.

Brian

[johnholmes]

hi Brian and Dave

having problems in getting the original charts/diagrams to download other than doing every one.

Can you each tell me just which diagrams you cannot download and I'll then put those up for each of you.

cheers

John

[grab my graupel]

hi Brian and Dave

having problems in getting the original charts/diagrams to download other than doing every one.

Can you each tell me just which diagrams you cannot download and I'll then put those up for each of you.

cheers

John

Hi John

They are Diagrams 5. 8. 9. that don't open for me. I just get an error saying some files are missing

Regards

Brian

[johnholmes]

okay I'll dig em out and post up on here

diagrams 5, 8 and 9

simple it would seem. However when I did them they are numbered a bit different so you may get a couple you can already access!

diagram 4

diagram 8

or is it this one?

diagram 9

are they ok and the ones you wanted Brian?

b----etc ignore the ones at the end!

[grab my graupel]

I think that those are right thanks John.

I will spend some time tonight matching them to the thread, and I should be able to let you know in the morning

Regards

Brian

[dave48]

Thanks for putting them up, I am still missing diagram 2 though, the one about the pressure heights and dry bulb temperatures.

[johnholmes]

coming up

is that the one?

[dave48]

It's the third one down on the page, it has a bit of text on it. I think I have worked it out though, I have looked about on the internet to try and cover that bit so don't worry if you can't find it. Thanks again for you help, I really appreciate it.

[johnholmes]

try this one?

any good?

[J07]

From an historical point of view, how come the Americans went for a SkewT/log(p) diagram, whilst the Commonwealth went with Tephigrams?

A good thing about tephigrams is that area = energy, is this also the case for SkewT's? I have often wondered, but never found the answer.

It also seems that sounding data is more readily available on the internet in the form of SkewT's, which is only going to boost its popularity amongst non-professionals.

[grab my graupel]

Hi John

I think I am just one chart short now, the DALR the one, which Dave has mentioned. I should manage without that particular one though

thanks.

Regards

Brian

[johnholmes]

tell me just where in the text it is and I'll put it up tomorrow as not sure which you mean

ok it appears to be diagram 3

hope that is the one?

[grab my graupel]

Hi John

It is this one Which wont open for me, so I'm unable to read the text

[johnholmes]

got me stumped mate cannot find that one?

ok I see it, daigram 2, pressure lines and dalr lines; like you I'm unable to open it to see what the text is, although I think I can guess.

bit late now Brian/Dave I'll sort something out tomorrow, okay?

[grab my graupel]

got me stumped mate cannot find that one?

ok I see it, daigram 2, pressure lines and dalr lines; like you I'm unable to open it to see what the text is, although I think I can guess.

bit late now Brian/Dave I'll sort something out tomorrow, okay?

Yes that's the problm John....I just get a board message saying some files are missing

Thanks for trying John there is no rush, I will bear with you

Kind regards

Brian.

[johnholmes]

sorry Brian other commitments mean I will not have time to put a new version of that pressure-height DALR/temperature up until over the weekend, but it will be done

John

[grab my graupel]

sorry Brian other commitments mean I will not have time to put a new version of that pressure-height DALR/temperature up until over the weekend, but it will be done

John

Thanks John

No Problem at all

Brian

[johnholmes]

skew-t are the 'most' popular as its an American thing thus GFS shows them. As to area I THINK its pretty much the same but don't quote me.

for Brian/Dave and anyone else wanting the learning section this is the one you asked for, I've redone it in simple terms so hope its a suitable replacement for the original.

Eventually I'll check through all the links and replace where there is a problem.

skew_t_repeat.doc