指定気圧面の観測データ（日ごとの値）
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稚内 2004年4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 | 1016.6 | 11 | 0.0 | 46 | 1.9 | 290 |
| 2 | 1009.6 | 11 | -1.6 | 49 | 6.4 | 80 |
| 3 | 1011.1 | 11 | 1.1 | 52 | 3.0 | 260 |
| 4 | 1010.3 | 11 | 4.2 | 67 | 5.4 | 250 |
| 5 | 1005.4 | 11 | 4.0 | 89 | 4.7 | 200 |
| 6 | 1011.1 | 11 | 4.7 | 83 | 0.6 | 200 |
| 7 | 1006.9 | 11 | 4.4 | 55 | 3.6 | 250 |
| 8 | 1005.5 | 11 | 3.7 | 59 | 5.5 | 250 |
| 9 | 1006.9 | 11 | 2.2 | 71 | 4.7 | 330 |
| 10 | 1016.4 | 11 | 2.4 | 56 | 3.0 | 220 |
| 11 | 1012.0 | 11 | 3.6 | 77 | 2.0 | 180 |
| 12 | 1012.9 | 11 | 5.3 | 53 | 2.7 | 280 |
| 13 | 1012.9 | 11 | 6.5 | 80 | 5.6 | 210 |
| 14 | 1005.8 | 11 | 5.7 | 60 | 4.2 | 230 |
| 15 | 1009.7 | 11 | 3.5 | 48 | 2.3 | 320 |
| 16 | 999.3 | 11 | 0.6 | 93 | 7.2 | 80 |
| 17 | 1011.0 | 11 | 2.9 | 72 | 4.0 | 240 |
| 18 | 1004.8 | 11 | 6.8 | 87 | 7.7 | 230 |
| 19 | 1002.4 | 11 | 10.2 | 84 | 2.2 | 180 |
| 20 | 983.0 | 11 | 2.6 | 89 | 6.9 | 320 |
| 21 | 1004.8 | 11 | 3.4 | 67 | 5.4 | 340 |
| 22 | 1006.2 | 11 | 1.8 | 72 | 7.6 | 360 |
| 23 | 1004.8 | 11 | 2.0 | 78 | 3.4 | 360 |
| 24 | 1004.1 | 11 | 2.4 | 60 | 2.3 | 290 |
| 25 | 1009.9 | 11 | 2.7 | 63 | 1.9 | 260 |
| 26 | 1009.8 | 11 | 6.3 | 71 | 4.5 | 220 |
| 27 | 1005.8 | 11 | 6.8 | 64 | 3.1 | 100 |
| 28 | 1006.1 | 11 | 4.9 | 67 | 1.1 | 200 |
| 29 | 1003.8 | 11 | 9.5 | 68 | 5.7 | 190 |
| 30 | 1015.8 | 11 | 5.8 | 66 | 2.7 | 330 |