number of freeze days and wetbulb temperature

[AlteVite]

Hi at all, i have two questions for you:
- how number of freeze days are numbered? may be the number of days when the minimum temperature is less than zero?
- there is a method (tag or something like this) to calculate the wet-bulb temperature? (and the dry one?)

can someone help me?

thanks!

[jturlier]

Hello,
Freeze days are days with temperature below °C.

The major aim of GW is to draw graphs. It is not intended to perform all meteorological parameter calculation.
there is no wet bulb calculation, in fact the only purpose of wet bulb temperature measurement is to calculate dewpoint. As long ad dewo=point is provided, I don't see any reason to have WB.
However, if it does not matter, could you explain why you want it ?

Would you mind adding in your signature your station model, software driving it, GW version, windows version and any information that may help if you have problems.

[AlteVite]

Hi jturlier thank you so much for your reply.

About wet-bulb temperature: for me it's important to study it in snowfalls, help me to foresee snowfalls...etc but this is not a problem.. i'll find other method to calculate it.

About freeze days, i understand what is calculated:
- a freeze day has min <0
- a ice day has max <0

Does GW stats calculate also "ice days" number?

thanks

ps i added on signature information you asked me!

[jturlier]

Buongiorno,
GW does not have a tag for iced days so you can't see it in the statistics, however, this information is available in the NOAA part of the statistics

icyday.PNG

As you can see the days with high temperature being below 0 are icy days.

Ok for your signature.

Being a bit curious, I'm interested in what you intend to do. If it doesn't bother you, would you mind to give me some more informations (by MP).

Ciao

A presto

Jean

PS : I forgot that if you use the NOAA compare script (search noaa compare), icy days are shown

[jturlier]

Hello !
As said in my mail, Wet bulb thermometer temperature is dewpoint temperature.
For dry thermometer temperature, this is the outside temp.

I hope it answers your question.

Ciao

Jean

[AlteVite]

Yes it is!

thank you so much!

[Jim_AFCB]

Hello !
As said in my mail, Wet bulb thermometer temperature is dewpoint temperature.
For dry thermometer temperature, this is the outside temp.

I hope it answers your question.

Ciao

Jean

Actually... dewpoint and wet-bulb temp are not the same! The dewpoint is usually lower unless RH is 100%, is it not?

AlteVite - nice signature - is it generated by Graphweather?

[AlteVite]

Yes, Jim_AFCB the image is generated by GraphWeather.

From my website you can download all template i wrote.
Here the link
http://valdeimochenimeteo.altervista.org/risorse.php

i've analized deeply wet bulb temperature and dewpoint temperature: they are not the same measure.

best regards

[Jim_AFCB]

Thanks for those! I will have a look later. Need to translate from Italian as I know almost none.

Cheers!

[jturlier]

Hi Jim,
I would suggest you to use REVERSO, in my opinion it's better than Google to translate from Italian to french or english. For other languages I don't know.
Jean

i've analized deeply wet bulb temperature and dewpoint temperature: they are not the same measure.

Buongiorno Gianluca,
please would you mind posting the major diferences between the two, that will make me a bit less stupid !
Ciao ed a presto

Jean