We need to aggregate to daily inputs for loadest / EGRET. New forecasts are created every 6 hours for medium / long range, but we want an equal number of valid times for each forecasted day. If we kept the reference times that did not occur on midnight, then valid days 1 and 10 would have 6 fewer valid times than days 2-9. Thus, just take the reference times that start at midnight.
We need to aggregate to daily inputs for loadest / EGRET. New forecasts are created every 6 hours for medium / long range, but we want an equal number of valid times for each forecasted day. If we kept the reference times that did not occur on midnight, then valid days 1 and 10 would have 6 fewer valid times than days 2-9. Thus, just take the reference times that start at midnight.