指定気圧面の観測データ（日ごとの値）
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昭和 1998年1月9時（現地時間 3時） 地上
| 日 | 気圧(hPa) | 高度(m) | 気温(℃) | 相対湿度(%) | 風速(m/s) | 風向(°) |
|---|---|---|---|---|---|---|
| 1 | 976.3 | 21 | 3.0 | 69 | 21.6 | 50 |
| 2 | 977.8 | 21 | 3.5 | 60 | 16.6 | 70 |
| 3 | 978.5 | 21 | -2.2 | 82 | 4.0 | 40 |
| 4 | 975.4 | 21 | -0.9 | 67 | 0.8 | 20 |
| 5 | 981.4 | 21 | -0.3 | 79 | 2.0 | 20 |
| 6 | 987.0 | 21 | -1.6 | 92 | 4.7 | 20 |
| 7 | 986.8 | 21 | 0.1 | 82 | 0.0 | - |
| 8 | 993.7 | 21 | -0.9 | 86 | 0.0 | - |
| 9 | 992.3 | 21 | -1.7 | 90 | 3.6 | 200 |
| 10 | 982.3 | 21 | -1.7 | 89 | 1.0 | 180 |
| 11 | 981.5 | 21 | -2.4 | 89 | 2.6 | 50 |
| 12 | 985.2 | 21 | -1.6 | 78 | 18.7 | 60 |
| 13 | 987.3 | 21 | -1.8 | 58 | 14.4 | 70 |
| 14 | 981.8 | 21 | -2.8 | 63 | 7.3 | 70 |
| 15 | 980.3 | 21 | 0.0 | 77 | 14.1 | 50 |
| 16 | 985.3 | 21 | -1.5 | 66 | 12.9 | 60 |
| 17 | 986.3 | 21 | -1.4 | 67 | 1.9 | 100 |
| 18 | 987.2 | 21 | -4.2 | 67 | 5.2 | 60 |
| 19 | 987.9 | 21 | -2.2 | 64 | 0.0 | - |
| 20 | 985.9 | 21 | -5.9 | 64 | 1.6 | 100 |
| 21 | 981.2 | 21 | -4.2 | 63 | 1.9 | 150 |
| 22 | 980.9 | 21 | -6.6 | 64 | 0.8 | 110 |
| 23 | 982.5 | 21 | -5.4 | 58 | 0.4 | 130 |
| 24 | 982.9 | 21 | -2.8 | 70 | 3.7 | 30 |
| 25 | 979.6 | 21 | -0.8 | 85 | 16.3 | 50 |
| 26 | 981.9 | 21 | -2.9 | 70 | 6.6 | 60 |
| 27 | 979.7 | 21 | -1.9 | 71 | 4.0 | 70 |
| 28 | 978.3 | 21 | -1.2 | 71 | 9.8 | 50 |
| 29 | 983.0 | 21 | -1.8 | 65 | 6.8 | 60 |
| 30 | 987.2 | 21 | -1.2 | 74 | 3.0 | 170 |
| 31 | 988.4 | 21 | -3.7 | 76 | 5.8 | 60 |