|Update frequency:||every 12 hours|
|Resolution:||0.5°, 30.0nm, 55.6km|
|Model duration:||48 forecasts starting at 0 hr, ending at 16 days|
|Parameters:||pressure, wind, rain, temperature, humidity, convection, vertical velocity, 250 mb, 500 mb, 850 mb, ensemble standard deviation, ensemble control (GDPS)|
|GRIB model date:||Sat Apr 20 12:00:00 2019 UTC|
|Download date:||Sat Apr 20 18:20:29 2019 UTC|
|Download delay:||6hr 20min|
This model is first produced by Environment Canada, and then processed and made available by NOAA to the general public.
This is an ensemble model, and in this case, it is the result of averaging 21 slightly different weather models together. The idea in an ensemble model is that there is instability in many weather systems and that capturing the initial state of the atmosphere for the weather models can not be done perfectly. The ensemble process slightly alters the initial inputs and/or the numerical model in order to generate a range of different results. This suite of results can be analyzed to generate the average and standard deviation.
You can download the ensemble mean (average), standard deviation and the control member, which allows you estimate the uncertainty in the forecasts being generated.
For more information on the model, see this link.