指定気圧面の観測データ（日ごとの値）
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根室 2003年5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 | 1007.7 | 39 | 4.2 | 70 | 10.3 | 220 |
| 2 | 1004.0 | 39 | 10.3 | 59 | 7.5 | 220 |
| 3 | 1005.7 | 39 | 1.8 | 95 | 2.4 | 110 |
| 4 | 1011.7 | 39 | 6.9 | 56 | 5.2 | 20 |
| 5 | 1012.1 | 39 | 6.4 | 63 | 3.6 | 150 |
| 6 | 1014.2 | 39 | 5.0 | 92 | 3.2 | 160 |
| 7 | 998.6 | 39 | 5.7 | 98 | 3.9 | 190 |
| 8 | 999.4 | 39 | 4.3 | 70 | 8.0 | 320 |
| 9 | 1009.9 | 39 | 4.6 | 60 | 3.3 | 350 |
| 10 | 1018.9 | 39 | 3.5 | 85 | 4.0 | 190 |
| 11 | 1025.1 | 39 | 5.8 | 88 | 4.5 | 190 |
| 12 | 1021.4 | 39 | 5.4 | 93 | 3.8 | 190 |
| 13 | 1014.9 | 39 | 6.5 | 98 | 7.8 | 210 |
| 14 | 1011.2 | 39 | 7.9 | 98 | 4.6 | 160 |
| 15 | 1011.5 | 39 | 5.6 | 80 | 2.5 | 70 |
| 16 | 1006.2 | 39 | 3.0 | 88 | 6.2 | 20 |
| 17 | 1010.5 | 39 | 4.3 | 85 | 4.7 | 230 |
| 18 | 1012.0 | 39 | 4.4 | 89 | 3.3 | 170 |
| 19 | 1008.6 | 39 | 3.6 | 94 | 4.0 | 150 |
| 20 | 1005.7 | 39 | 6.9 | 98 | 3.9 | 200 |
| 21 | 1009.4 | 39 | 5.3 | 83 | 3.8 | 360 |
| 22 | 1014.9 | 39 | 5.4 | 84 | 3.0 | 190 |
| 23 | 1018.9 | 39 | 3.5 | 97 | 3.5 | 170 |
| 24 | 1022.6 | 39 | 5.4 | 94 | 2.3 | 190 |
| 25 | 1020.2 | 39 | 5.6 | 91 | 6.1 | 200 |
| 26 | 1013.9 | 39 | 6.7 | 91 | 7.3 | 200 |
| 27 | 1011.1 | 39 | 8.4 | 97 | 4.9 | 200 |
| 28 | 1014.8 | 39 | 6.6 | 91 | 2.8 | 170 |
| 29 | 1014.9 | 39 | 10.2 | 98 | 7.3 | 220 |
| 30 | 1013.2 | 39 | 10.4 | 98 | 9.2 | 210 |
| 31 | 1005.1 | 39 | 9.6 | 97 | 7.0 | 190 |