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300 mb Heights and Wind - Forecasts for the 300mb conditions for 11 December 2000 at 00Z are shown in the animation. Each frame of the animation shows a forecast for the same time, from 12 hours to seven days before the observation time. Notice how the forecasts made three days to 12 hours before 11 December are very similar and show very little error. Forecasts beyond three days (out to seven days) show more variance from the actual conditions (the analysis shown in the first frame) and more error the further ahead the forecast is made.