指定気圧面の観測データ（日ごとの値）
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八丈島 2007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 | 989.4 | 164 | 22.1 | 88 | 3.5 | 278 |
| 2 | 986.5 | 164 | 25.4 | 97 | 5.7 | 225 |
| 3 | 986.9 | 164 | 24.6 | 99 | 5.6 | 215 |
| 4 | 984.4 | 164 | 25.1 | 97 | 9.2 | 218 |
| 5 | 986.2 | 164 | 23.5 | 88 | 5.1 | 242 |
| 6 | 986.3 | 164 | 23.9 | 99 | 15.0 | 222 |
| 7 | 983.9 | 164 | 23.3 | 96 | 2.6 | 269 |
| 8 | 987.6 | 164 | 22.7 | 89 | 5.7 | 48 |
| 9 | 987.4 | 164 | 22.0 | 95 | 5.6 | 28 |
| 10 | 990.9 | 164 | 23.7 | 90 | 4.2 | 217 |
| 11 | 990.7 | 164 | 25.4 | 97 | 6.8 | 238 |
| 12 | 994.3 | 164 | 23.0 | 85 | 4.6 | 308 |
| 13 | 993.1 | 164 | 22.9 | 95 | 2.1 | 286 |
| 14 | 987.9 | 164 | 25.5 | 99 | 8.3 | 183 |
| 15 | 974.0 | 164 | 26.3 | 84 | 3.8 | 250 |
| 16 | 985.7 | 164 | 21.8 | 94 | 3.9 | 48 |
| 17 | 982.6 | 164 | 24.0 | 99 | 3.7 | 205 |
| 18 | 985.4 | 164 | 22.2 | 99 | 7.5 | 66 |
| 19 | 988.5 | 164 | 22.3 | 97 | 2.5 | 63 |
| 20 | 988.2 | 164 | 22.1 | 96 | 1.2 | 297 |
| 21 | 987.8 | 164 | 23.8 | 92 | 4.2 | 250 |
| 22 | 987.3 | 164 | 23.9 | 95 | 5.2 | 248 |
| 23 | 988.8 | 164 | 25.0 | 93 | 0.5 | 10 |
| 24 | 993.0 | 164 | 22.2 | 93 | 5.4 | 38 |
| 25 | 992.8 | 164 | 21.7 | 94 | 2.5 | 10 |
| 26 | 990.5 | 164 | 24.9 | 96 | 4.3 | 214 |
| 27 | 989.8 | 164 | 24.5 | 95 | 3.6 | 266 |
| 28 | 988.0 | 164 | 25.8 | 96 | 4.6 | 201 |
| 29 | 989.3 | 164 | 25.9 | 91 | 3.0 | 259 |
| 30 | 988.6 | 164 | 25.5 | 98 | 4.8 | 219 |
| 31 | 991.7 | 164 | 25.3 | 92 | 1.9 | 250 |