指定気圧面の観測データ（日ごとの値）
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那覇 1999年5月9時 400hPa
| 日 | ジオポテンシャル 高度(m) | 気温(℃) | 相対湿度(%) | 風速(m/s) | 風向(°) |
|---|---|---|---|---|---|
| 1 | 7552 | -16.5 | 82 | 23 | 261 |
| 2 | 7552 | -17.4 | 81 | 14 | 269 |
| 3 | 7549 | -18.1 | 74 | 9 | 302 |
| 4 | 7532 | -17.4 | 70 | 15 | 264 |
| 5 | 7501 | -17.1 | 60 | 20 | 251 |
| 6 | 7472 | -18.6 | 73 | 30 | 266 |
| 7 | 7447 | -19.1 | 79 | 25 | 244 |
| 8 | 7505 | -19.6 | 23 | 24 | 268 |
| 9 | 7520 | -17.0 | 77 | 23 | 248 |
| 10 | 7500 | -15.4 | 72 | 24 | 244 |
| 11 | 7504 | -18.2 | 25 | 27 | 243 |
| 12 | 7517 | -17.9 | 75 | 28 | 246 |
| 13 | 7517 | -18.1 | 79 | 27 | 238 |
| 14 | 7516 | -17.3 | 1 | 20 | 303 |
| 15 | 7519 | -18.6 | 20 | 7 | 274 |
| 16 | 7508 | -17.7 | 34 | 15 | 289 |
| 17 | 7524 | -16.3 | 75 | 14 | 283 |
| 18 | 7555 | -15.1 | 38 | 17 | 277 |
| 19 | 7564 | -17.6 | 36 | 12 | 243 |
| 20 | 7556 | -18.5 | 84 | 22 | 252 |
| 21 | 7564 | -19.6 | 28 | 11 | 252 |
| 22 | 7572 | -17.1 | 59 | 9 | 276 |
| 23 | 7593 | -16.3 | 80 | 12 | 274 |
| 24 | 7585 | -15.5 | 65 | 13 | 250 |
| 25 | 7566 | -16.4 | 45 | 22 | 246 |
| 26 | 7581 | -15.9 | 88 | 20 | 253 |
| 27 | 7568 | -14.9 | 45 | 23 | 242 |
| 28 | 7530 | -14.8 | 89 | 23 | 234 |
| 29 | 7488 | -17.8 | 15 | 31 | 278 |
| 30 | 7507 | -20.1 | 41 | 23 | 302 |
| 31 | 7541 | -16.1 | 74 | 18 | 291 |