指定気圧面の観測データ（日ごとの値）
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昭和 1974年10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 | 989.4 | 21 | -11.4 | 70 | 3.9 | 60 |
| 2 | 976.8 | 21 | -7.9 | 91 | 15.9 | 50 |
| 3 | 973.6 | 21 | -10.2 | 93 | 22.5 | 40 |
| 4 | 969.6 | 21 | -14.1 | 70 | 0.4 | 80 |
| 5 | 974.3 | 21 | -14.1 | 74 | 5.9 | 30 |
| 6 | 985.4 | 21 | -11.8 | 69 | 3.5 | 180 |
| 7 | 980.7 | 21 | -14.2 | 60 | 0.8 | 250 |
| 8 | 981.1 | 21 | -18.3 | 64 | 0.3 | 280 |
| 9 | 981.3 | 21 | -17.9 | 53 | 1.7 | 190 |
| 10 | 977.6 | 21 | -20.0 | 62 | 1.5 | 210 |
| 11 | 974.4 | 21 | -18.9 | 59 | 0.7 | 210 |
| 12 | 980.2 | 21 | -22.0 | 65 | 3.5 | 220 |
| 13 | 978.2 | 21 | -17.3 | 69 | 0.7 | 170 |
| 14 | 980.1 | 21 | -16.9 | 59 | 4.0 | 240 |
| 15 | 983.7 | 21 | -23.3 | 66 | 0.7 | 280 |
| 16 | 986.0 | 21 | -16.1 | 55 | 3.5 | 180 |
| 17 | 987.2 | 21 | -11.7 | 56 | 0.5 | 280 |
| 18 | 974.1 | 21 | -7.5 | 62 | 5.1 | 210 |
| 19 | 987.2 | 21 | -5.3 | 90 | 6.3 | 30 |
| 20 | 989.8 | 21 | -6.5 | 84 | 5.1 | 30 |
| 21 | 982.8 | 21 | -7.0 | 83 | 1.6 | 140 |
| 22 | 984.0 | 21 | -10.4 | 80 | 1.5 | 30 |
| 23 | 980.5 | 21 | -12.6 | 67 | 1.0 | 290 |
| 24 | 980.7 | 21 | -12.3 | 61 | 2.2 | 20 |
| 25 | 981.0 | 21 | -13.3 | 59 | 3.3 | 180 |
| 26 | 980.3 | 21 | -10.2 | 83 | 9.5 | 30 |
| 27 | 976.1 | 21 | -5.2 | 94 | 17.1 | 50 |
| 28 | 971.9 | 21 | -3.6 | 88 | 20.9 | 60 |
| 29 | 991.5 | 21 | -4.1 | 83 | 0.6 | 100 |
| 30 | 987.1 | 21 | -7.5 | 54 | 8.7 | 40 |
| 31 | 957.7 | 21 | -3.6 | 85 | 26.0 | 50 |