指定気圧面の観測データ（日ごとの値）
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昭和 1997年12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 | 982.0 | 21 | 4.3 | 64 | 11.2 | 80 |
| 2 | 992.7 | 21 | 3.5 | 62 | 3.3 | 30 |
| 3 | 991.7 | 21 | 0.8 | 62 | 2.3 | 80 |
| 4 | 988.6 | 21 | 0.0 | 64 | 5.0 | 170 |
| 5 | 991.3 | 21 | 0.7 | 71 | 3.0 | 360 |
| 6 | 996.2 | 21 | 2.3 | 67 | 3.9 | 290 |
| 7 | 993.3 | 21 | 1.3 | 65 | 2.5 | 300 |
| 8 | 987.3 | 21 | -0.2 | 55 | 0.1 | - |
| 9 | 982.9 | 21 | 2.5 | 60 | 1.7 | 50 |
| 10 | 990.8 | 21 | 3.0 | 61 | 1.1 | 340 |
| 11 | 979.2 | 21 | 0.7 | 59 | 5.8 | 180 |
| 12 | 983.2 | 21 | 1.0 | 71 | 1.1 | 50 |
| 13 | 988.3 | 21 | -0.2 | 68 | 5.2 | 20 |
| 14 | 987.1 | 21 | 0.3 | 72 | 4.5 | 20 |
| 15 | 988.6 | 21 | 1.3 | 78 | 0.0 | - |
| 16 | 984.4 | 21 | 1.6 | 57 | 2.8 | 360 |
| 17 | 989.8 | 21 | 3.8 | 60 | 5.4 | 180 |
| 18 | 976.2 | 21 | 2.5 | 71 | 5.4 | 30 |
| 19 | 986.2 | 21 | 1.7 | 74 | 7.2 | 50 |
| 20 | 993.2 | 21 | 1.1 | 82 | 5.5 | 30 |
| 21 | 989.4 | 21 | 2.9 | 50 | 4.5 | 170 |
| 22 | 987.6 | 21 | 4.5 | 45 | 2.0 | 30 |
| 23 | 992.6 | 21 | 1.9 | 50 | 3.6 | 350 |
| 24 | 994.4 | 21 | 1.3 | 46 | 1.7 | 360 |
| 25 | 991.8 | 21 | 1.9 | 37 | 0.5 | 50 |
| 26 | 996.2 | 21 | 1.0 | 57 | 4.5 | 210 |
| 27 | 993.6 | 21 | -1.1 | 72 | 8.8 | 20 |
| 28 | 993.8 | 21 | 0.2 | 60 | 2.2 | 40 |
| 29 | 988.5 | 21 | -0.1 | 70 | 5.5 | 40 |
| 30 | 986.2 | 21 | 1.3 | 74 | 14.5 | 50 |
| 31 | 980.0 | 21 | 2.6 | 75 | 4.7 | 30 |