Prognostic weather chart
 

Hi,
I am looking for information on how to decipher high and low level Prognostic charts, especially of the Indian Sub-Continent..I would be more than obliged if somebody could direct me to a website that can help me learn more about them with a few samples..I had seen one a while ago that depicted Cb clouds, Jet streams etc.


Thanks a lot in advance,
Sahil

It´s not exactly what you are looking for, but try this one:
http://aviationweather.gov/data/iffdp/2105.gif

Hi,
Thank you...All I need now is to understand how to decipher it..There are more types of wind and temperature Prognostic charts though..I really appreciate your help..These are rare to find on the internet..

Thank you,
Sahil

Try here and here.
Hope this helps.
HVIII

Thanks Henry VIII,
This explains how to decipher them very properly..Thank you so much...


Cheers,
Sahil

Hi,

It is plus minus 3 hours from the time of issue.

They are issued without an end time, so you use them until the next one comes out, which is six hours later.

The Australian explanation can be found at Airservices Australia - Aeronautical Information Package (AIP)
You will need to consent to the site conditions to enter.
Select AIP Book
General
3.5 Meterology Section
20 Sig.Wx Charts
24 Example and symbols.

I thought prognostic charts were valid for 12 hrs and issued every 6 hours (twice daily). Correct me if I am wrong.