Hour by hour forecast shows full Sun, on the radar it shows overcast clouds

[jeroenvdb]

I encounter more and more discrepancies between forecast and realtime radar. The hour by hour forecast shows full Sun but when I look at the realtime radar it shows overcast clouds which is, when I look outside, the reality. How can it be that the hour to hour forecast is totally wrong and not updated when the radar tells me another story.

[Gkikas LGPZ]

@jeroenvdb
Forecast models update mostly
every 6 hrs, so may not take into account latest radar data.
Also, radar data are many times wrong for various reasons (ground-sea clutter, ducting, interference with wifi masts etc).
Thus, must overpass a quality control before assimilation into a model.