指定気圧面の観測データ（日ごとの値）
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昭和 1974年4月21時（現地時間 15時） 地上
| 日 | 気圧(hPa) | 高度(m) | 気温(℃) | 相対湿度(%) | 風速(m/s) | 風向(°) |
|---|---|---|---|---|---|---|
| 1 | 983.6 | 21 | -5.4 | 73 | 10.9 | 40 |
| 2 | /// | /// | /// | /// | /// | /// |
| 3 | 974.3 | 21 | -6.3 | 79 | 2.5 | 30 |
| 4 | 979.6 | 21 | -11.4 | 85 | 4.7 | 180 |
| 5 | 991.9 | 21 | -20.1 | 57 | 5.8 | 200 |
| 6 | 996.6 | 21 | -8.7 | 66 | 10.3 | 30 |
| 7 | 989.5 | 21 | -7.0 | 83 | 2.5 | 190 |
| 8 | 978.2 | 21 | -10.6 | 69 | 2.2 | 160 |
| 9 | 976.8 | 21 | -10.5 | 54 | 8.2 | 50 |
| 10 | 986.4 | 21 | -10.0 | 58 | 8.1 | 60 |
| 11 | /// | /// | /// | /// | /// | /// |
| 12 | /// | /// | /// | /// | /// | /// |
| 13 | 988.5 | 21 | -6.0 | 61 | 17.7 | 60 |
| 14 | 986.5 | 21 | -9.8 | 61 | 9.3 | 70 |
| 15 | 985.3 | 21 | -7.7 | 67 | 8.9 | 60 |
| 16 | 983.4 | 21 | -9.1 | 52 | 9.3 | 80 |
| 17 | 986.4 | 21 | -9.3 | 71 | 3.1 | 60 |
| 18 | 986.8 | 21 | -7.6 | 66 | 9.0 | 90 |
| 19 | 986.3 | 21 | -10.2 | 64 | 8.8 | 90 |
| 20 | 993.6 | 21 | -13.2 | 55 | 7.5 | 80 |
| 21 | 996.2 | 21 | -11.3 | 52 | 5.2 | 110 |
| 22 | 994.9 | 21 | -10.8 | 71 | 2.6 | 130 |
| 23 | 991.3 | 21 | -15.1 | 60 | 2.2 | 190 |
| 24 | 992.5 | 21 | -20.3 | 58 | 3.9 | 170 |
| 25 | 987.8 | 21 | -20.9 | 66 | 4.3 | 210 |
| 26 | 981.5 | 21 | -27.4 | 59 | 0.3 | 260 |
| 27 | 978.8 | 21 | -10.1 | 89 | 19.0 | 60 |
| 28 | 997.6 | 21 | -11.5 | 70 | 0.8 | 70 |
| 29 | 997.9 | 21 | -11.0 | 69 | 8.9 | 60 |
| 30 | 985.9 | 21 | -6.9 | 69 | 3.7 | 100 |