指定気圧面の観測データ（日ごとの値）
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石垣島 1999年4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 | 1014.1 | 7 | 24.7 | 83 | 2.0 | 150 |
| 2 | 1014.1 | 7 | 22.5 | 79 | 6.1 | 20 |
| 3 | 1014.8 | 7 | 21.8 | 69 | 5.1 | 60 |
| 4 | 1012.9 | 7 | 22.3 | 73 | 4.6 | 350 |
| 5 | 1012.0 | 7 | 21.0 | 70 | 1.4 | 10 |
| 6 | 1015.6 | 7 | 21.6 | 36 | 3.1 | 20 |
| 7 | 1017.9 | 7 | 21.5 | 52 | 3.8 | 70 |
| 8 | 1016.3 | 7 | 22.9 | 60 | 6.1 | 120 |
| 9 | 1013.0 | 7 | 24.8 | 79 | 4.7 | 160 |
| 10 | 1014.1 | 7 | 20.8 | 67 | 3.1 | 30 |
| 11 | 1009.7 | 7 | 22.5 | 64 | 2.8 | 150 |
| 12 | 1006.3 | 7 | 21.4 | 89 | 0.6 | 60 |
| 13 | 1015.9 | 7 | 20.4 | 62 | 4.2 | 50 |
| 14 | 1017.5 | 7 | 21.7 | 61 | 4.8 | 70 |
| 15 | 1014.2 | 7 | 23.8 | 71 | 3.6 | 110 |
| 16 | 1010.9 | 7 | 25.6 | 85 | 4.6 | 150 |
| 17 | 1006.6 | 7 | 26.2 | 88 | 3.3 | 180 |
| 18 | 1007.0 | 7 | 25.8 | 81 | 4.9 | 20 |
| 19 | 1009.7 | 7 | 24.5 | 83 | 4.5 | 50 |
| 20 | 1012.5 | 7 | 23.5 | 90 | 5.2 | 60 |
| 21 | 1009.9 | 7 | 25.9 | 84 | 3.1 | 190 |
| 22 | 1006.8 | 7 | 23.8 | 80 | 3.4 | 340 |
| 23 | 1008.0 | 7 | 22.4 | 72 | 2.8 | 50 |
| 24 | 1009.0 | 7 | 23.5 | 68 | 3.1 | 60 |
| 25 | 1009.1 | 7 | 23.3 | 68 | 2.2 | 30 |
| 26 | 1008.7 | 7 | 24.2 | 65 | 3.3 | 40 |
| 27 | 1010.6 | 7 | 23.0 | 59 | 4.4 | 10 |
| 28 | 1013.9 | 7 | 21.5 | 62 | 4.3 | 30 |
| 29 | 1015.8 | 7 | 22.5 | 59 | 2.1 | 10 |
| 30 | 1017.1 | 7 | 23.5 | 57 | 5.8 | 80 |