Calendar periods are fixed to a constant period definition

Weekly: Monday to Sunday
Monthly: Calendar months
Quarterly: DJF, MAM, JJA, SON

Only complete periods are shown.

Choose an initialization date.

Hindcasts are available from 2000 for weekly and monthly timescales and from 1981 for quarterly timescales.

Rolling periods are calculated from the init date (inclusive) plus lead time

Weekly: 7 days, e.g. if the init date is August 15, the week will start on August 15 and end on August 21.

Monthly: 30 days
Quarterly: 90 days

Forecast View Introduction