指定気圧面の観測データ（日ごとの値）
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南大東島 2018年12月9時 850hPa
| 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 | 1575 | 9.3 | 90 | 9 | 117 |
| 2 | 1570 | 13.1 | 61 | 3 | 106 |
| 3 | 1580 | 16.9 | 43 | 2 | 165 |
| 4 | 1582 | 17.4 | 64 | 6 | 178 |
| 5 | 1566 | 15.2 | 86 | 4 | 341 |
| 6 | 1557 | 16.3 | 72 | 7 | 240 |
| 7 | 1558 | 16.1 | 75 | 2 | 273 |
| 8 | 1569 | 13.5 | 91 | 1 | 190 |
| 9 | 1572 | 10.7 | 95 | 7 | 114 |
| 10 | /// | /// | /// | /// | /// |
| 11 | 1551 | 13.2 | 91 | 14 | 131 |
| 12 | 1539 | 14.2 | 93 | 9 | 283 |
| 13 | 1550 | 6.4 | 91 | 6 | 344 |
| 14 | 1579 | 7.8 | 97 | 3 | 16 |
| 15 | 1577 | 5.1 | 89 | 5 | 23 |
| 16 | 1561 | 8.5 | 72 | 1 | 36 |
| 17 | 1521 | 13.0 | 68 | 12 | 282 |
| 18 | 1543 | 5.6 | 77 | 5 | 330 |
| 19 | 1566 | 5.1 | 83 | 5 | 90 |
| 20 | 1548 | 6.9 | 93 | 6 | 170 |
| 21 | 1558 | 12.5 | 64 | 4 | 65 |
| 22 | 1558 | 14.0 | 67 | 3 | 241 |
| 23 | 1556 | 13.7 | 92 | 2 | 87 |
| 24 | 1546 | 12.1 | 96 | 3 | 174 |
| 25 | 1546 | 12.3 | 96 | 4 | 156 |
| 26 | 1530 | 15.0 | 81 | 9 | 180 |
| 27 | 1501 | 13.8 | 87 | 11 | 328 |
| 28 | 1533 | 7.8 | 65 | 12 | 323 |
| 29 | 1552 | 3.3 | 92 | 11 | 343 |
| 30 | 1572 | 2.6 | 79 | 9 | 25 |
| 31 | 1597 | 5.1 | 96 | 7 | 29 |