I know what you guys like to use this site for, but I wish to tell you of a completely different way that you were likely unaware of in which I was using these historical forecasts.
Your historical forecasts, when combined with the Outgoing Longwave Radiation 1 week daily data from the United States National Oceanic and Atmospheric Administration's Earth Systems Research Laboratory allowed me to successfully find where the outgoing longwave radiation anomalies were due to prior days cloud cover, or due to something more nefarious.
With the information from your website, along with the OLR data from NOAA's ESRL I was successfully predicting the locations of larger M6.0+ earthquakes. These OLR anomaly maps for the day come out typically about 12 hours after the day has ended. Without this historical reference for cloud cover and rain/storms, I now have no reference to tell which OLR anomalies are due to cloud cover, or due to potential incoming large earthquakes.
I beg of you to please get this option back up and running as soon as it is physically possible. Lives are truly hanging in the balance for this special feature.