指定気圧面の観測データ（日ごとの値）
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昭和 1999年1月9時（現地時間 3時） 250hPa
| 日 | ジオポテンシャル 高度(m) | 気温(℃) | 相対湿度(%) | 風速(m/s) | 風向(°) |
|---|---|---|---|---|---|
| 1 | 9762 | -53.8 | /// | 11 | 350 |
| 2 | 9721 | -55.2 | /// | 14 | 40 |
| 3 | 9779 | -56.8 | /// | 20 | 20 |
| 4 | 9722 | -55.8 | /// | 23 | 78 |
| 5 | 9675 | -58.0 | /// | 16 | 120 |
| 6 | 9703 | -51.8 | /// | 16 | 241 |
| 7 | 9810 | -56.7 | /// | 17 | 305 |
| 8 | 9731 | -48.8 | /// | 26 | 7 |
| 9 | 9787 | -52.5 | /// | 24 | 53 |
| 10 | 9785 | -50.6 | /// | 12 | 10 |
| 11 | 9837 | -55.0 | /// | 16 | 24 |
| 12 | 9759 | -46.0 | /// | 8 | 342 |
| 13 | 9858 | -44.9 | /// | 23 | 247 |
| 14 | 10060 | -54.8 | /// | 26 | 239 |
| 15 | 10063 | -56.2 | /// | 25 | 261 |
| 16 | 9868 | -58.2 | /// | 24 | 156 |
| 17 | 9666 | -44.7 | /// | 19 | 153 |
| 18 | 9669 | -48.2 | /// | 6 | 208 |
| 19 | 9695 | -49.0 | /// | 6 | 156 |
| 20 | 9726 | -51.2 | /// | 7 | 146 |
| 21 | 9685 | -51.4 | /// | 1 | 189 |
| 22 | 9715 | -54.2 | /// | 8 | 262 |
| 23 | 9692 | -50.7 | /// | 5 | 279 |
| 24 | 9675 | -49.5 | /// | 4 | 235 |
| 25 | 9706 | -48.8 | /// | 8 | 230 |
| 26 | 9743 | -51.4 | /// | 16 | 261 |
| 27 | 9747 | -58.1 | /// | 8 | 346 |
| 28 | 9716 | -53.0 | /// | 10 | 334 |
| 29 | 9636 | -46.0 | /// | 14 | 29 |
| 30 | 9630 | -52.2 | /// | 8 | 40 |
| 31 | 9631 | -52.1 | /// | 4 | 13 |