指定気圧面の観測データ（日ごとの値）
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昭和 1998年11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 | 975.5 | 21 | -7.8 | 57 | 5.8 | 50 |
| 2 | 982.9 | 21 | -8.7 | 38 | 0.2 | - |
| 3 | 989.7 | 21 | -9.2 | 50 | 0.0 | - |
| 4 | 984.5 | 21 | -9.2 | 47 | 4.7 | 170 |
| 5 | 984.8 | 21 | -9.3 | 42 | 2.3 | 220 |
| 6 | 986.1 | 21 | -7.7 | 70 | 2.0 | 210 |
| 7 | 977.1 | 21 | -4.5 | 80 | 6.8 | 30 |
| 8 | 970.0 | 21 | -4.1 | 64 | 10.9 | 50 |
| 9 | 975.9 | 21 | -3.0 | 49 | 2.1 | 30 |
| 10 | 984.8 | 21 | -6.8 | 67 | 3.1 | 10 |
| 11 | 955.7 | 21 | -4.2 | 85 | 12.0 | 60 |
| 12 | 959.3 | 21 | -5.5 | 87 | 19.9 | 60 |
| 13 | 975.5 | 21 | -5.7 | 70 | 7.5 | 30 |
| 14 | 971.6 | 21 | -7.3 | 64 | 2.7 | 210 |
| 15 | 979.2 | 21 | -7.3 | 59 | 7.2 | 40 |
| 16 | 977.0 | 21 | -5.3 | 64 | 7.5 | 50 |
| 17 | 964.6 | 21 | -3.0 | 55 | 3.9 | 30 |
| 18 | 967.6 | 21 | -1.6 | 46 | 1.6 | 10 |
| 19 | 979.9 | 21 | -1.6 | 50 | 4.0 | 230 |
| 20 | 980.3 | 21 | -1.4 | 51 | 4.9 | 160 |
| 21 | 984.7 | 21 | -6.1 | 84 | 11.7 | 30 |
| 22 | 982.2 | 21 | -0.5 | 63 | 2.8 | 30 |
| 23 | 967.1 | 21 | 0.2 | 51 | 3.7 | 340 |
| 24 | 966.8 | 21 | 3.2 | 47 | 1.4 | 340 |
| 25 | 968.5 | 21 | 2.1 | 60 | 12.6 | 60 |
| 26 | 965.0 | 21 | -0.3 | 61 | 5.6 | 30 |
| 27 | 976.7 | 21 | 0.9 | 76 | 3.7 | 280 |
| 28 | 977.8 | 21 | -2.5 | 76 | 5.6 | 30 |
| 29 | 967.9 | 21 | 0.0 | 61 | 10.0 | 60 |
| 30 | 977.8 | 21 | 2.0 | 39 | 0.5 | 300 |