Welcome to tephigram.ca. This site displays observed data and forecast 'data' available from
https://dd.weather.gc.ca.
The model 'data' is from the Canadian Regional model. It is displayed as is.
Clicking on a site on the map will present the latest upper air information in
two formats - a tephigram and a hodograph - on a separate tab. The date of
the desired 'data' can be chosen from the calendar control at the top of
the page. Chose either the 00Z or 12Z model run as well.
You can naviagate through the chosen 'data' set by moving to the next
valid time period pressing 'f' or the right arrow or moving to the previous
valid time period pressing 'b' or the left arrow.