Describe the historic error trend for each forecast lead time (24,48 and 72 hours). 1400 -700 1200 24-hr forecasts ames 48-hr forecasts - 600 1000 72-hr forecasts - 500 800 400 Mean error (kilometers) Mean error (nautical miles) 600 - - 300 400 200 200 100 0 1970 1975 1980 1985 1990 1995 2000 2005 Year

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