¥0-12 hrs:
Can track individual severe storms
¥12-48 hrs: Can predict daily weather
changes well, including
regions threatened by severe weather.
¥3-5 days: Can predict major winter
storms, excessive heat and cold
snaps. Rainfall forecasts are less accurate.
¥6-15 days: Can predict average temp and
rain over 5 day period
well, but daily changes are not forecast well.
¥30-90 days: Some skill for average temp
but not so much for rainfall
over period. Forecasts use combination of model forecasts
and statistical relationships (e.g. El Nino).
¥90-360 days:
ÒSlightÓ skill for SST anomalies.