指定気圧面の観測データ（日ごとの値）
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八丈島 2012年11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 | 992.7 | 155 | 18.6 | 71 | 4.8 | 264 |
| 2 | 998.1 | 155 | 15.0 | 57 | 5.8 | 282 |
| 3 | 999.9 | 155 | 14.9 | 66 | 1.4 | 323 |
| 4 | 1003.6 | 155 | 14.5 | 80 | 2.2 | 26 |
| 5 | 1001.5 | 155 | 19.1 | 73 | 5.4 | 164 |
| 6 | 991.8 | 155 | 17.6 | 97 | 1.6 | 207 |
| 7 | 992.0 | 155 | 16.4 | 54 | 5.4 | 267 |
| 8 | 995.5 | 155 | 17.1 | 60 | 6.0 | 255 |
| 9 | 998.5 | 155 | 16.9 | 64 | 2.8 | 299 |
| 10 | 1002.9 | 155 | 16.4 | 57 | 4.4 | 50 |
| 11 | 997.6 | 155 | 17.9 | 79 | 7.6 | 159 |
| 12 | 993.5 | 155 | 18.3 | 73 | 5.3 | 253 |
| 13 | 987.0 | 155 | 18.2 | 62 | 7.1 | 237 |
| 14 | 990.2 | 155 | 13.5 | 50 | 6.7 | 267 |
| 15 | 997.0 | 155 | 10.4 | 64 | 4.8 | 343 |
| 16 | 1005.8 | 155 | 10.2 | 89 | 1.3 | 309 |
| 17 | 984.1 | 155 | 19.3 | 89 | 17.9 | 211 |
| 18 | 997.4 | 155 | 13.9 | 68 | 2.0 | 322 |
| 19 | 994.8 | 155 | 14.7 | 77 | 4.1 | 239 |
| 20 | 994.9 | 155 | 14.0 | 60 | 6.4 | 275 |
| 21 | 1001.2 | 155 | 11.7 | 82 | 0.9 | 59 |
| 22 | 997.6 | 155 | 13.9 | 86 | 2.7 | 276 |
| 23 | 988.3 | 155 | 15.7 | 87 | 1.7 | 296 |
| 24 | 996.7 | 155 | 12.6 | 72 | 5.6 | 40 |
| 25 | 1003.4 | 155 | 12.0 | 85 | 1.4 | 40 |
| 26 | 983.6 | 155 | 18.9 | 96 | 12.0 | 226 |
| 27 | 998.6 | 155 | 11.8 | 64 | 6.0 | 290 |
| 28 | 1002.7 | 155 | 10.1 | 85 | 3.0 | 299 |
| 29 | 999.1 | 155 | 10.9 | 78 | 6.3 | 356 |
| 30 | 993.3 | 155 | 14.1 | 91 | 7.3 | 22 |