Everyone seems to have their own favourite sources of information.
I use the Space Environment Centre
Vast amount of resources are housed at this site.
A bit of digging in the gopher area will lead to archives of daily
measurements , alerts and forecasts.
The 3 day satellite environment plots of proton flux, electron flux, GOES
satellite Hp and the estimated Kp is the one that I find particularly
see last weekends chart at
Also 2 typical examples of forecasts