指定気圧面の観測データ（日ごとの値）
 |  |
 |  |  |  |  |  |  |  |  |  |  |  |  |
 |  |  |  |  |  |  |  |  |  |  |  |  |
 |  |  |  |  |  |
南大東島 1999年7月21時 地上
| 日 | 気圧(hPa) | 高度(m) | 気温(℃) | 相対湿度(%) | 風速(m/s) | 風向(°) |
|---|---|---|---|---|---|---|
| 1 | 1007.8 | 20 | 25.8 | 90 | 2.6 | 170 |
| 2 | 1007.8 | 20 | 27.8 | 84 | 4.4 | 170 |
| 3 | 1008.0 | 20 | 27.1 | 85 | 0.0 | - |
| 4 | 1006.6 | 20 | 27.8 | 83 | 1.7 | 240 |
| 5 | 1006.1 | 20 | 27.8 | 83 | 3.6 | 250 |
| 6 | 1006.3 | 20 | 26.1 | 88 | 2.7 | 300 |
| 7 | 1004.3 | 20 | 26.5 | 87 | 3.2 | 210 |
| 8 | 1004.3 | 20 | 27.2 | 77 | 4.5 | 250 |
| 9 | 1000.0 | 20 | 25.9 | 90 | 8.0 | 220 |
| 10 | 999.2 | 20 | 27.5 | 85 | 5.5 | 250 |
| 11 | 997.6 | 20 | 26.2 | 91 | 2.7 | 330 |
| 12 | 996.5 | 20 | 27.5 | 84 | 2.8 | 270 |
| 13 | 999.7 | 20 | 28.1 | 82 | 5.4 | 250 |
| 14 | 1002.3 | 20 | 28.2 | 80 | 5.0 | 270 |
| 15 | 1004.5 | 20 | 26.9 | 84 | 1.2 | 260 |
| 16 | 1005.4 | 20 | 26.7 | 85 | 1.7 | 220 |
| 17 | 1004.0 | 20 | 26.5 | 91 | 2.2 | 360 |
| 18 | 1002.3 | 20 | 28.3 | 80 | 2.3 | 310 |
| 19 | 1002.0 | 20 | 28.5 | 81 | 1.8 | 50 |
| 20 | 1000.3 | 20 | 26.7 | 92 | 0.3 | 260 |
| 21 | 1004.8 | 20 | 27.9 | 83 | 7.9 | 120 |
| 22 | 1006.6 | 20 | 28.0 | 79 | 6.7 | 110 |
| 23 | 1004.9 | 20 | 28.1 | 76 | 5.8 | 110 |
| 24 | 1002.4 | 20 | 26.9 | 82 | 9.6 | 110 |
| 25 | 997.5 | 20 | 25.6 | 91 | 11.1 | 120 |
| 26 | 999.9 | 20 | 26.4 | 92 | 10.4 | 190 |
| 27 | 1005.6 | 20 | 25.6 | 88 | 7.6 | 190 |
| 28 | 1008.5 | 20 | 26.7 | 87 | 5.5 | 140 |
| 29 | 1008.2 | 20 | 27.2 | 88 | 4.0 | 90 |
| 30 | 1006.0 | 20 | 27.2 | 83 | 4.2 | 60 |
| 31 | 999.4 | 20 | 26.6 | 89 | 10.7 | 90 |