指定気圧面の観測データ（日ごとの値）
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南大東島 1996年5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 | 1009.7 | 20 | 21.2 | 90 | 2.4 | 220 |
| 2 | 1012.3 | 20 | 21.3 | 83 | 2.8 | 30 |
| 3 | 1011.8 | 20 | 21.9 | 84 | 3.6 | 90 |
| 4 | 1004.9 | 20 | 23.5 | 93 | 5.5 | 230 |
| 5 | 1005.6 | 20 | 21.4 | 76 | 3.3 | 50 |
| 6 | 1009.4 | 20 | 21.6 | 81 | 2.5 | 40 |
| 7 | 1005.9 | 20 | 22.4 | 87 | 4.8 | 140 |
| 8 | 1002.6 | 20 | 22.8 | 82 | 4.8 | 310 |
| 9 | 1011.4 | 20 | 21.3 | 50 | 4.1 | 10 |
| 10 | 1014.6 | 20 | 21.1 | 63 | 4.4 | 90 |
| 11 | 1011.9 | 20 | 22.1 | 80 | 2.1 | 100 |
| 12 | 1012.2 | 20 | 18.4 | 89 | 4.6 | 20 |
| 13 | 1011.6 | 20 | 21.0 | 68 | 5.4 | 90 |
| 14 | 1011.4 | 20 | 21.8 | 79 | 6.8 | 80 |
| 15 | 1013.9 | 20 | 18.3 | 90 | 6.3 | 70 |
| 16 | 1010.6 | 20 | 19.5 | 89 | 8.4 | 80 |
| 17 | 998.5 | 20 | 20.8 | 84 | 12.0 | 40 |
| 18 | 1006.5 | 20 | 20.4 | 74 | 6.3 | 50 |
| 19 | 1010.3 | 20 | 20.7 | 73 | 4.2 | 80 |
| 20 | 1010.9 | 20 | 21.5 | 84 | 7.0 | 100 |
| 21 | 1010.7 | 20 | 21.5 | 95 | 1.2 | 200 |
| 22 | 1010.9 | 20 | 20.5 | 93 | 0.8 | 180 |
| 23 | 1009.8 | 20 | 20.9 | 92 | 4.3 | 140 |
| 24 | 1004.6 | 20 | 20.6 | 93 | 6.0 | 60 |
| 25 | 1011.3 | 20 | 21.4 | 86 | 1.9 | 10 |
| 26 | 1012.3 | 20 | 22.0 | 83 | 1.5 | 90 |
| 27 | 1009.9 | 20 | 22.9 | 90 | 3.8 | 110 |
| 28 | 1010.0 | 20 | 24.5 | 93 | 4.0 | 200 |
| 29 | 1011.7 | 20 | 24.8 | 94 | 4.3 | 180 |
| 30 | 1013.6 | 20 | 25.0 | 91 | 4.3 | 240 |
| 31 | 1012.2 | 20 | 22.3 | 86 | 4.3 | 50 |