A Convection Nowcasting Method Based on Machine Learning

Figure 8

Comparison between the composite reflectivity factor forecast results and the actual weather conditions for the 2 h starting at 0400UTC August 1 2017. The forecast results of the optical flow method: (a) 30 min, (b) 60 min, (c) 90 min, and (d) 120 min after the start time of 1100UTC, respectively; the forecast results of the ConvLSTM method: (e) 30 min, (f) 60 min, (g) 90 min, and (h) 120 min after the start time of 1100UTC, respectively; the actual weather conditions: (i) 30 min, (j) 60 min, (k) 90 min, and (l) 120 min after the start time of 1100UTC, respectively; red square lines represents the area where the predicted radar echoes of ConvLSTM are closer to the observation than the prediction of the optical flow method.

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