  Forecast of the atmospheric parameters and optical turbulence applied to the
ground-based astronomy is very crucial mainly for the queue scheduling. So far,
most efforts have been addressed by our group in developing algorithms for the
optical turbulence (CN2) and annexed integrated astroclimatic parameters and
quantifying the performances of the Astro-Meso-Nh package in reconstructing
such parameters. Besides, intensive analyses on the Meso-Nh performances= in
reconstructing atmospheric parameters relevant for the ground-based astronomy
has been carried out. Our studies referred always to the night time regime. To
extend the applications of our studies to the day time regime, we present, in
this contribution, preliminary results obtained by comparing model outputs and
measurements of classical atmospheric parameter relevant for the ground-based
astronomy in night and day time. We chose as a test case, the Roque de los
Muchachos Observatory (Canary Islands), that offers a very extended set of
measurements provided by different sensors belonging to different telescopes on
the same summit/Observatory. The convective regime close to the ground typical
of the day time is pretty different from the stable regime characterising the
night time. This study aims therefore to enlarge the domain of validity of the
Astro-Meso-Nh code to new turbulence regimes and it permits to cover the total
24 hours of a day. Such an approach will permit not only an application to
solar telescopes (e.g. EST) but also applications to a much extended set of
scientific fields, not only in astronomical context such as satellite
communications.
