指定気圧面の観測データ（日ごとの値）
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八丈島 2001年1月9時 地上
| 日 | 気圧(hPa) | 高度(m) | 気温(℃) | 相対湿度(%) | 風速(m/s) | 風向(°) |
|---|---|---|---|---|---|---|
| 1 | 985.0 | 153 | 11.4 | 62 | 5.0 | 310 |
| 2 | 993.2 | 153 | 12.6 | 54 | 5.1 | 250 |
| 3 | 992.4 | 153 | 11.5 | 57 | 4.3 | 280 |
| 4 | 994.7 | 153 | 8.5 | 46 | 4.5 | 260 |
| 5 | 1001.2 | 153 | 7.6 | 52 | 3.8 | 260 |
| 6 | 1004.9 | 153 | 8.0 | 60 | 3.9 | 290 |
| 7 | 1007.7 | 153 | 10.4 | 62 | 1.9 | 70 |
| 8 | 985.6 | 153 | 14.8 | 82 | 3.6 | 300 |
| 9 | 1004.3 | 153 | 12.3 | 56 | 3.4 | 50 |
| 10 | 989.3 | 153 | 17.4 | 93 | 5.1 | 210 |
| 11 | 991.5 | 153 | 12.3 | 60 | 5.3 | 270 |
| 12 | 994.0 | 153 | 9.2 | 56 | 4.6 | 260 |
| 13 | 996.4 | 153 | 8.5 | 66 | 2.9 | 300 |
| 14 | 988.3 | 153 | 5.0 | 74 | 4.3 | 280 |
| 15 | 994.7 | 153 | 5.4 | 44 | 5.5 | 270 |
| 16 | 998.9 | 153 | 4.8 | 68 | 3.2 | 280 |
| 17 | 1002.3 | 153 | 5.9 | 55 | 4.2 | 280 |
| 18 | 1003.9 | 153 | 7.8 | 61 | 2.7 | 290 |
| 19 | 1006.4 | 153 | 6.8 | 57 | 3.5 | 280 |
| 20 | 1003.7 | 153 | 9.1 | 72 | 2.2 | 320 |
| 21 | 992.4 | 153 | 11.0 | 66 | 3.6 | 300 |
| 22 | 1000.3 | 153 | 8.6 | 63 | 3.1 | 260 |
| 23 | 998.7 | 153 | 9.6 | 93 | 0.7 | 320 |
| 24 | 1004.7 | 153 | 7.0 | 57 | 3.9 | 40 |
| 25 | 1004.2 | 153 | 10.8 | 59 | 1.7 | 120 |
| 26 | 987.0 | 153 | 12.9 | 94 | 5.6 | 360 |
| 27 | 985.0 | 153 | 12.9 | 96 | 5.1 | 70 |
| 28 | 995.4 | 153 | 9.8 | 58 | 3.8 | 270 |
| 29 | 996.1 | 153 | 7.8 | 57 | 3.6 | 270 |
| 30 | 1001.5 | 153 | 7.0 | 58 | 2.5 | 260 |
| 31 | 1003.4 | 153 | 10.0 | 55 | 2.1 | 280 |