¥Start a forecast using an analysis at
some time T for initial conditions.
¥Perform additional forecasts starting
from times T+1, T+2, T+3,... all ending at the same time as the first forecast.
¥The overlap
period gives an ensemble of forecasts starting from different but physically plausible
initial states.
¥here, forecasts begin at 00 UTC 15 May
1993 and at preceding 12-hourly times