Monthly mean of stream lines at 200 hPa (upper) and 850 hPa (lower) in January A track of the tropical cyclone formed in January is superimposed on them. Areas of high-cloud amount greater than 30% are shaded on the 850 hPa chart. T01
Monthly mean of stream lines at 200 hPa (upper) and 850 hPa (lower) in February A track of the tropical cyclone formed in February is superimposed on them. Areas of high-cloud amount greater than 30% are shaded on the 850 hPa chart. T01 T02
Monthly mean of stream lines at 200 hPa (upper) and 850 hPa (lower) in March Areas of high-cloud amount greater than 30% are shaded on the 850 hPa chart.
Monthly mean of stream lines at 200 hPa (upper) and 850 hPa (lower) in April Areas of high-cloud amount greater than 30% are shaded on the 850 hPa chart. T06 T04 T05 T07
Monthly mean of stream lines at 200 hPa (upper) and 850 hPa (lower) in May A track of the tropical cyclone formed in May is superimposed on them. Areas of high-cloud amount greater than 30% are shaded on the 850 hPa chart. T03
Monthly mean of stream lines at 200 hPa (upper) and 850 hPa (lower) in June Tracks of the tropical cyclones formed in June are superimposed on them. Areas of high-cloud amount greater than 30% are shaded on the 850 hPa chart. T18 T15 T17 T19 T16 T04 T05 T06 T05T04
Monthly mean of stream lines at 200 hPa (upper) and 850 hPa (lower) in July Tracks of the tropical cyclones formed in July are superimposed on them. Areas of high-cloud amount greater than 30% are shaded on the 850 hPa chart. T08 T07 T10 T09 T11 T08 T09 T11 T10 T07
Monthly mean of stream lines at 200 hPa (upper) and 850 hPa (lower) in August Track of the tropical cyclone formed in August are superimposed on them. Areas of high-cloud amount greater than 30% are shaded on the 850 hPa chart. T14 T12 T16 T17 T13 T15 T12 T14 T17 T13 T15 T16
Monthly mean of stream lines at 200 hPa (upper) and 850 hPa (lower) in September Tracks of the tropical cyclones formed in September are superimposed on them. Areas of high-cloud amount greater than 30% are shaded on the 850 hPa chart. T21 T19 T18 T20 T18 T20 T19 T21
Monthly mean of stream lines at 200 hPa (upper) and 850 hPa (lower) in October Tracks of the tropical cyclones formed in October are superimposed on them. Areas of high-cloud amount greater than 30% are shaded on the 850 hPa chart. T22 T23 T22 T23
Monthly mean of stream lines at 200 hPa (upper) and 850 hPa (lower) in November Tracks of the tropical cyclones formed in November are superimposed on them. Areas of high-cloud amount greater than 30% are shaded on the 850 hPa chart. T25 T24 T25
Monthly mean of stream lines at 200 hPa (upper) and 850 hPa (lower) in December A track of the tropical cyclone formed in December is superimposed on them. Areas of high-cloud amount greater than 30% are shaded on the 850 hPa chart. T26